3x-ui

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/release.yml

@@ -0,0 +1,146 @@
+name: Release 3X-ui
+on:
+  push:
+    tags:
+      - "*"
+  workflow_dispatch:
+jobs:
+  release:
+    runs-on: ubuntu-20.04
+    outputs:
+      upload_url: ${{ steps.create_release.outputs.upload_url }}
+    steps:
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          draft: true
+          prerelease: true
+  linuxamd64build:
+    name: build x-ui amd64 version
+    needs: release
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+      - name: build linux amd64 version
+        run: |
+          CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -o xui-release -v main.go
+          mkdir x-ui
+          cp xui-release x-ui/xui-release
+          cp x-ui.service x-ui/x-ui.service
+          cp x-ui.sh x-ui/x-ui.sh
+          cd x-ui
+          mv xui-release x-ui
+          mkdir bin
+          cd bin
+          wget https://github.com/XTLS/Xray-core/releases/latest/download/Xray-linux-64.zip
+          unzip Xray-linux-64.zip
+          rm -f Xray-linux-64.zip geoip.dat geosite.dat
+          wget https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geoip.dat
+          wget https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat
+          mv xray xray-linux-amd64
+          cd ..
+          cd ..
+      - name: package
+        run: tar -zcvf x-ui-linux-amd64.tar.gz x-ui
+      - name: upload
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ needs.release.outputs.upload_url }}
+          asset_path: x-ui-linux-amd64.tar.gz
+          asset_name: x-ui-linux-amd64.tar.gz
+          asset_content_type: application/gzip
+  linuxarm64build:
+    name: build x-ui arm64 version
+    needs: release
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+      - name: build linux arm64 version
+        run: |
+          sudo apt-get update
+          sudo apt install gcc-aarch64-linux-gnu
+          CGO_ENABLED=1 GOOS=linux GOARCH=arm64 CC=aarch64-linux-gnu-gcc go build -o xui-release -v main.go
+          mkdir x-ui
+          cp xui-release x-ui/xui-release
+          cp x-ui.service x-ui/x-ui.service
+          cp x-ui.sh x-ui/x-ui.sh
+          cd x-ui
+          mv xui-release x-ui
+          mkdir bin
+          cd bin
+          wget https://github.com/XTLS/Xray-core/releases/latest/download/Xray-linux-arm64-v8a.zip
+          unzip Xray-linux-arm64-v8a.zip
+          rm -f Xray-linux-arm64-v8a.zip geoip.dat geosite.dat
+          wget https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geoip.dat
+          wget https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat
+          mv xray xray-linux-arm64
+          cd ..
+          cd ..
+      - name: package
+        run: tar -zcvf x-ui-linux-arm64.tar.gz x-ui
+      - name: upload
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ needs.release.outputs.upload_url }}
+          asset_path: x-ui-linux-arm64.tar.gz
+          asset_name: x-ui-linux-arm64.tar.gz
+          asset_content_type: application/gzip
+  linuxs390xbuild:
+    name: build x-ui s390x version
+    needs: release
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+      - name: build linux s390x version
+        run: |
+          sudo apt-get update
+          sudo apt install gcc-s390x-linux-gnu -y
+          CGO_ENABLED=1 GOOS=linux GOARCH=s390x CC=s390x-linux-gnu-gcc go build -o xui-release -v main.go
+          mkdir x-ui
+          cp xui-release x-ui/xui-release
+          cp x-ui.service x-ui/x-ui.service
+          cp x-ui.sh x-ui/x-ui.sh
+          cd x-ui
+          mv xui-release x-ui
+          mkdir bin
+          cd bin
+          wget https://github.com/XTLS/Xray-core/releases/latest/download/Xray-linux-s390x.zip
+          unzip Xray-linux-s390x.zip
+          rm -f Xray-linux-s390x.zip geoip.dat geosite.dat
+          wget https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geoip.dat
+          wget https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat
+          mv xray xray-linux-s390x
+          cd ..
+          cd ..
+      - name: package
+        run: tar -zcvf x-ui-linux-s390x.tar.gz x-ui
+      - name: upload
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ needs.release.outputs.upload_url }}
+          asset_path: x-ui-linux-s390x.tar.gz
+          asset_name: x-ui-linux-s390x.tar.gz
+          asset_content_type: application/gzip

.gitignore

@@ -0,0 +1,13 @@
+.idea
+tmp
+bin/xray-darwin-arm64
+bin/config.json
+dist/
+x-ui-*.tar.gz
+/x-ui
+/release.sh
+.sync*
+main
+release/
+access.log
+.cache

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -0,0 +1,41 @@
+# 3x-ui
+> **Disclaimer: This project is only for personal learning and communication, please do not use it for illegal purposes, please do not use it in a production environment**
+
+# Install & Upgrade
+
+```
+bash <(curl -Ls https://raw.githubusercontent.com/mhsanaei/3x-ui/master/install.sh)
+```
+
+# SSL
+```
+apt-get install certbot -y
+certbot certonly --standalone --agree-tos --register-unsafely-without-email -d yourdomain.com
+certbot renew --dry-run
+```
+
+# Default settings
+
+- Port: 2053
+- user: admin
+- password: admin
+- database path: /etc/x-ui/x-ui.db
+
+- before you set ssl on settings
+- http:// ip or domain:2053/xui
+
+- After you set ssl on settings 
+- https://yourdomain:2053/xui
+
+# suggestion system
+- Ubuntu 20.04+
+
+# pic
+
+![1](https://raw.githubusercontent.com/MHSanaei/3x-ui/main/media/1.png)
+![2](https://raw.githubusercontent.com/MHSanaei/3x-ui/main/media/2.png)
+![3](https://raw.githubusercontent.com/MHSanaei/3x-ui/main/media/3.png)
+![4](https://raw.githubusercontent.com/MHSanaei/3x-ui/main/media/4.png)
+
+
+

config/config.go

@@ -0,0 +1,50 @@
+package config
+
+import (
+	_ "embed"
+	"fmt"
+	"os"
+	"strings"
+)
+
+//go:embed version
+var version string
+
+//go:embed name
+var name string
+
+type LogLevel string
+
+const (
+	Debug LogLevel = "debug"
+	Info  LogLevel = "info"
+	Warn  LogLevel = "warn"
+	Error LogLevel = "error"
+)
+
+func GetVersion() string {
+	return strings.TrimSpace(version)
+}
+
+func GetName() string {
+	return strings.TrimSpace(name)
+}
+
+func GetLogLevel() LogLevel {
+	if IsDebug() {
+		return Debug
+	}
+	logLevel := os.Getenv("XUI_LOG_LEVEL")
+	if logLevel == "" {
+		return Info
+	}
+	return LogLevel(logLevel)
+}
+
+func IsDebug() bool {
+	return os.Getenv("XUI_DEBUG") == "true"
+}
+
+func GetDBPath() string {
+	return fmt.Sprintf("/etc/%s/%s.db", GetName(), GetName())
+}

config/name

@@ -0,0 +1 @@
+x-ui

config/version

@@ -0,0 +1 @@
+0.5.3

database/db.go

@@ -0,0 +1,104 @@
+package database
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+	"io/fs"
+	"os"
+	"path"
+	"x-ui/config"
+	"x-ui/xray"
+	"x-ui/database/model"
+)
+
+var db *gorm.DB
+
+func initUser() error {
+	err := db.AutoMigrate(&model.User{})
+	if err != nil {
+		return err
+	}
+	var count int64
+	err = db.Model(&model.User{}).Count(&count).Error
+	if err != nil {
+		return err
+	}
+	if count == 0 {
+		user := &model.User{
+			Username: "admin",
+			Password: "admin",
+		}
+		return db.Create(user).Error
+	}
+	return nil
+}
+
+func initInbound() error {
+	return db.AutoMigrate(&model.Inbound{})
+}
+
+func initSetting() error {
+	return db.AutoMigrate(&model.Setting{})
+}
+func initInboundClientIps() error {
+	return db.AutoMigrate(&model.InboundClientIps{})
+}
+func initClientTraffic() error {
+	return db.AutoMigrate(&xray.ClientTraffic{})
+}
+
+func InitDB(dbPath string) error {
+	dir := path.Dir(dbPath)
+	err := os.MkdirAll(dir, fs.ModeDir)
+	if err != nil {
+		return err
+	}
+
+	var gormLogger logger.Interface
+
+	if config.IsDebug() {
+		gormLogger = logger.Default
+	} else {
+		gormLogger = logger.Discard
+	}
+
+	c := &gorm.Config{
+		Logger: gormLogger,
+	}
+	db, err = gorm.Open(sqlite.Open(dbPath), c)
+	if err != nil {
+		return err
+	}
+
+	err = initUser()
+	if err != nil {
+		return err
+	}
+	err = initInbound()
+	if err != nil {
+		return err
+	}
+	err = initSetting()
+	if err != nil {
+		return err
+	}
+	err = initInboundClientIps()
+	if err != nil {
+		return err
+	}
+	err = initClientTraffic()
+	if err != nil {
+		return err
+	}
+	
+	return nil
+}
+
+func GetDB() *gorm.DB {
+	return db
+}
+
+func IsNotFound(err error) bool {
+	return err == gorm.ErrRecordNotFound
+}

database/model/model.go

@@ -0,0 +1,81 @@
+package model
+
+import (
+	"fmt"
+	"x-ui/util/json_util"
+	"x-ui/xray"
+)
+
+type Protocol string
+
+const (
+	VMess       Protocol = "vmess"
+	VLESS       Protocol = "vless"
+	Dokodemo    Protocol = "Dokodemo-door"
+	Http        Protocol = "http"
+	Trojan      Protocol = "trojan"
+	Shadowsocks Protocol = "shadowsocks"
+)
+
+type User struct {
+	Id       int    `json:"id" gorm:"primaryKey;autoIncrement"`
+	Username string `json:"username"`
+	Password string `json:"password"`
+}
+
+type Inbound struct {
+	Id         int    `json:"id" form:"id" gorm:"primaryKey;autoIncrement"`
+	UserId     int    `json:"-"`
+	Up         int64  `json:"up" form:"up"`
+	Down       int64  `json:"down" form:"down"`
+	Total      int64  `json:"total" form:"total"`
+	Remark     string `json:"remark" form:"remark"`
+	Enable     bool   `json:"enable" form:"enable"`
+	ExpiryTime int64  `json:"expiryTime" form:"expiryTime"`
+    ClientStats []xray.ClientTraffic  `gorm:"foreignKey:InboundId;references:Id" json:"clientStats" form:"clientStats"`
+
+	// config part
+	Listen         string   `json:"listen" form:"listen"`
+	Port           int      `json:"port" form:"port" gorm:"unique"`
+	Protocol       Protocol `json:"protocol" form:"protocol"`
+	Settings       string   `json:"settings" form:"settings"`
+	StreamSettings string   `json:"streamSettings" form:"streamSettings"`
+	Tag            string   `json:"tag" form:"tag" gorm:"unique"`
+	Sniffing       string   `json:"sniffing" form:"sniffing"`
+}
+type InboundClientIps struct {
+	Id       int    `json:"id" gorm:"primaryKey;autoIncrement"`
+	ClientEmail string `json:"clientEmail" form:"clientEmail" gorm:"unique"`
+	Ips string `json:"ips" form:"ips"`
+}
+
+func (i *Inbound) GenXrayInboundConfig() *xray.InboundConfig {
+	listen := i.Listen
+	if listen != "" {
+		listen = fmt.Sprintf("\"%v\"", listen)
+	}
+	return &xray.InboundConfig{
+		Listen:         json_util.RawMessage(listen),
+		Port:           i.Port,
+		Protocol:       string(i.Protocol),
+		Settings:       json_util.RawMessage(i.Settings),
+		StreamSettings: json_util.RawMessage(i.StreamSettings),
+		Tag:            i.Tag,
+		Sniffing:       json_util.RawMessage(i.Sniffing),
+	}
+}
+
+type Setting struct {
+	Id    int    `json:"id" form:"id" gorm:"primaryKey;autoIncrement"`
+	Key   string `json:"key" form:"key"`
+	Value string `json:"value" form:"value"`
+}
+type Client struct {
+	ID       string `json:"id"`
+	AlterIds uint16 `json:"alterId"`
+	Email string `json:"email"`
+	LimitIP int `json:"limitIp"`
+	Security string `json:"security"`
+	TotalGB      int64  `json:"totalGB" form:"totalGB"`
+	ExpiryTime int64  `json:"expiryTime" form:"expiryTime"`
+}

go.mod

@@ -0,0 +1,55 @@
+module x-ui
+
+go 1.19
+
+require (
+	github.com/BurntSushi/toml v1.2.0
+	github.com/Workiva/go-datastructures v1.0.53
+	github.com/gin-contrib/sessions v0.0.5
+	github.com/gin-gonic/gin v1.8.1
+	github.com/go-cmd/cmd v1.4.1
+	github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1
+	github.com/nicksnyder/go-i18n/v2 v2.2.0
+	github.com/op/go-logging v0.0.0-20160315200505-970db520ece7
+	github.com/robfig/cron/v3 v3.0.1
+	github.com/shirou/gopsutil v3.21.11+incompatible
+	github.com/xtls/xray-core v1.7.5
+	go.uber.org/atomic v1.10.0
+	golang.org/x/text v0.6.0
+	google.golang.org/grpc v1.53.0
+	gorm.io/driver/sqlite v1.3.6
+	gorm.io/gorm v1.23.8
+)
+
+require (
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/go-playground/locales v0.14.0 // indirect
+	github.com/go-playground/universal-translator v0.18.0 // indirect
+	github.com/go-playground/validator/v10 v10.10.0 // indirect
+	github.com/goccy/go-json v0.10.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/gorilla/context v1.1.1 // indirect
+	github.com/gorilla/securecookie v1.1.1 // indirect
+	github.com/gorilla/sessions v1.2.1 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mattn/go-sqlite3 v2.0.3+incompatible // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
+	github.com/pires/go-proxyproto v0.6.2 // indirect
+	github.com/tklauser/go-sysconf v0.3.5 // indirect
+	github.com/tklauser/numcpus v0.2.2 // indirect
+	github.com/ugorji/go/codec v1.2.7 // indirect
+	github.com/yusufpapurcu/wmi v1.2.2 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/net v0.5.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	google.golang.org/genproto v0.0.0-20230202175211-008b39050e57 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)

go.sum

@@ -0,0 +1,206 @@
+github.com/BurntSushi/toml v1.0.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/BurntSushi/toml v1.2.0 h1:Rt8g24XnyGTyglgET/PRUNlrUeu9F5L+7FilkXfZgs0=
+github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/Workiva/go-datastructures v1.0.53 h1:J6Y/52yX10Xc5JjXmGtWoSSxs3mZnGSaq37xZZh7Yig=
+github.com/Workiva/go-datastructures v1.0.53/go.mod h1:1yZL+zfsztete+ePzZz/Zb1/t5BnDuE2Ya2MMGhzP6A=
+github.com/andybalholm/brotli v1.0.4 h1:V7DdXeJtZscaqfNuAdSRuRFzuiKlHSC/Zh3zl9qY3JY=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgryski/go-metro v0.0.0-20211217172704-adc40b04c140 h1:y7y0Oa6UawqTFPCDw9JG6pdKt4F9pAhHv0B7FMGaGD0=
+github.com/francoispqt/gojay v1.2.13 h1:d2m3sFjloqoIUQU3TsHBgj6qg/BVGlTBeHDUmyJnXKk=
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install.sh

@@ -0,0 +1,175 @@
+#!/bin/bash
+
+red='\033[0;31m'
+green='\033[0;32m'
+yellow='\033[0;33m'
+plain='\033[0m'
+
+cur_dir=$(pwd)
+
+# check root
+[[ $EUID -ne 0 ]] && echo -e "${red}Fatal error：${plain} Please run this script with root privilege \n " && exit 1
+
+# check os
+if [[ -f /etc/redhat-release ]]; then
+    release="centos"
+elif cat /etc/issue | grep -Eqi "debian"; then
+    release="debian"
+elif cat /etc/issue | grep -Eqi "ubuntu"; then
+    release="ubuntu"
+elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then
+    release="centos"
+elif cat /proc/version | grep -Eqi "debian"; then
+    release="debian"
+elif cat /proc/version | grep -Eqi "ubuntu"; then
+    release="ubuntu"
+elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then
+    release="centos"
+else
+    echo -e "${red} Check system OS failed, please contact the author! ${plain}\n" && exit 1
+fi
+
+arch=$(arch)
+
+if [[ $arch == "x86_64" || $arch == "x64" || $arch == "amd64" ]]; then
+    arch="amd64"
+elif [[ $arch == "aarch64" || $arch == "arm64" ]]; then
+    arch="arm64"
+elif [[ $arch == "s390x" ]]; then
+    arch="s390x"
+else
+    arch="amd64"
+    echo -e "${red} Failed to check system arch, will use default arch: ${arch}${plain}"
+fi
+
+echo "arch: ${arch}"
+
+if [ $(getconf WORD_BIT) != '32' ] && [ $(getconf LONG_BIT) != '64' ]; then
+    echo "x-ui dosen't support 32-bit(x86) system, please use 64 bit operating system(x86_64) instead, if there is something wrong, please get in touch with me!"
+    exit -1
+fi
+
+os_version=""
+
+# os version
+if [[ -f /etc/os-release ]]; then
+    os_version=$(awk -F'[= ."]' '/VERSION_ID/{print $3}' /etc/os-release)
+fi
+if [[ -z "$os_version" && -f /etc/lsb-release ]]; then
+    os_version=$(awk -F'[= ."]+' '/DISTRIB_RELEASE/{print $2}' /etc/lsb-release)
+fi
+
+if [[ x"${release}" == x"centos" ]]; then
+    if [[ ${os_version} -le 6 ]]; then
+        echo -e "${red} Please use CentOS 7 or higher ${plain}\n" && exit 1
+    fi
+elif [[ x"${release}" == x"ubuntu" ]]; then
+    if [[ ${os_version} -lt 16 ]]; then
+        echo -e "${red} Please use Ubuntu 16 or higher ${plain}\n" && exit 1
+    fi
+elif [[ x"${release}" == x"debian" ]]; then
+    if [[ ${os_version} -lt 8 ]]; then
+        echo -e "${red} Please use Debian 8 or higher ${plain}\n" && exit 1
+    fi
+fi
+
+install_base() {
+    if [[ x"${release}" == x"centos" ]]; then
+        yum install wget curl tar -y
+    else
+        apt install wget curl tar -y
+    fi
+}
+
+#This function will be called when user installed x-ui out of sercurity
+config_after_install() {
+    echo -e "${yellow}Install/update finished! For security it's recommended to modify panel settings ${plain}"
+    read -p "Do you want to continue with the modification [y/n]? ": config_confirm
+    if [[ x"${config_confirm}" == x"y" || x"${config_confirm}" == x"Y" ]]; then
+        read -p "Please set up your username:" config_account
+        echo -e "${yellow}Your username will be:${config_account}${plain}"
+        read -p "Please set up your password:" config_password
+        echo -e "${yellow}Your password will be:${config_password}${plain}"
+        read -p "Please set up the panel port:" config_port
+        echo -e "${yellow}Your panel port is:${config_port}${plain}"
+        echo -e "${yellow}Initializing, please wait...${plain}"
+        /usr/local/x-ui/x-ui setting -username ${config_account} -password ${config_password}
+        echo -e "${yellow}Account name and password set successfully!${plain}"
+        /usr/local/x-ui/x-ui setting -port ${config_port}
+        echo -e "${yellow}Panel port set successfully!${plain}"
+    else
+        echo -e "${red}Canceled, will use the default settings.${plain}"
+    fi
+}
+
+install_x-ui() {
+    systemctl stop x-ui
+    cd /usr/local/
+
+    if [ $# == 0 ]; then
+        last_version=$(curl -Ls "https://api.github.com/repos/mhsanaei/3x-ui/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
+        if [[ ! -n "$last_version" ]]; then
+            echo -e "${red}Failed to fetch x-ui version, it maybe due to Github API restrictions, please try it later${plain}"
+            exit 1
+        fi
+        echo -e "Got x-ui latest version: ${last_version}, beginning the installation..."
+        wget -N --no-check-certificate -O /usr/local/x-ui-linux-${arch}.tar.gz https://github.com/mhsanaei/3x-ui/releases/download/${last_version}/x-ui-linux-${arch}.tar.gz
+        if [[ $? -ne 0 ]]; then
+            echo -e "${red}Downloading x-ui failed, please be sure that your server can access Github ${plain}"
+            exit 1
+        fi
+    else
+        last_version=$1
+        url="https://github.com/mhsanaei/3x-ui/releases/download/${last_version}/x-ui-linux-${arch}.tar.gz"
+        echo -e "Begining to install x-ui $1"
+        wget -N --no-check-certificate -O /usr/local/x-ui-linux-${arch}.tar.gz ${url}
+        if [[ $? -ne 0 ]]; then
+            echo -e "${red}Download x-ui $1 failed,please check the version exists${plain}"
+            exit 1
+        fi
+    fi
+
+    if [[ -e /usr/local/x-ui/ ]]; then
+        rm /usr/local/x-ui/ -rf
+    fi
+
+    tar zxvf x-ui-linux-${arch}.tar.gz
+    rm x-ui-linux-${arch}.tar.gz -f
+    cd x-ui
+    chmod +x x-ui bin/xray-linux-${arch}
+    cp -f x-ui.service /etc/systemd/system/
+    wget --no-check-certificate -O /usr/bin/x-ui https://raw.githubusercontent.com/mhsanaei/3x-ui/main/x-ui.sh
+    chmod +x /usr/local/x-ui/x-ui.sh
+    chmod +x /usr/bin/x-ui
+    config_after_install
+    #echo -e "If it is a new installation, the default web port is ${green}2053${plain}, The username and password are ${green}admin${plain} by default"
+    #echo -e "Please make sure that this port is not occupied by other procedures,${yellow} And make sure that port 2053 has been released${plain}"
+    #    echo -e "If you want to modify the 2053 to other ports and enter the x-ui command to modify it, you must also ensure that the port you modify is also released"
+    #echo -e ""
+    #echo -e "If it is updated panel, access the panel in your previous way"
+    #echo -e ""
+    systemctl daemon-reload
+    systemctl enable x-ui
+    systemctl start x-ui
+    echo -e "${green}x-ui ${last_version}${plain} installation finished, it is running now..."
+    echo -e ""
+    echo -e "x-ui control menu usages: "
+    echo -e "----------------------------------------------"
+    echo -e "x-ui              - Enter     Admin menu"
+    echo -e "x-ui start        - Start     x-ui"
+    echo -e "x-ui stop         - Stop      x-ui"
+    echo -e "x-ui restart      - Restart   x-ui"
+    echo -e "x-ui status       - Show      x-ui status"
+    echo -e "x-ui enable       - Enable    x-ui on system startup"
+    echo -e "x-ui disable      - Disable   x-ui on system startup"
+    echo -e "x-ui log          - Check     x-ui logs"
+    echo -e "x-ui v2-ui        - Migrate   v2-ui Account data to x-ui"
+    echo -e "x-ui update       - Update    x-ui"
+    echo -e "x-ui install      - Install   x-ui"
+    echo -e "x-ui uninstall    - Uninstall x-ui"
+    echo -e "----------------------------------------------"
+}
+
+echo -e "${green}Running...${plain}"
+install_base
+install_x-ui $1

logger/logger.go

@@ -0,0 +1,58 @@
+package logger
+
+import (
+	"github.com/op/go-logging"
+	"os"
+)
+
+var logger *logging.Logger
+
+func init() {
+	InitLogger(logging.INFO)
+}
+
+func InitLogger(level logging.Level) {
+	format := logging.MustStringFormatter(
+		`%{time:2006/01/02 15:04:05} %{level} - %{message}`,
+	)
+	newLogger := logging.MustGetLogger("x-ui")
+	backend := logging.NewLogBackend(os.Stderr, "", 0)
+	backendFormatter := logging.NewBackendFormatter(backend, format)
+	backendLeveled := logging.AddModuleLevel(backendFormatter)
+	backendLeveled.SetLevel(level, "")
+	newLogger.SetBackend(backendLeveled)
+
+	logger = newLogger
+}
+
+func Debug(args ...interface{}) {
+	logger.Debug(args...)
+}
+
+func Debugf(format string, args ...interface{}) {
+	logger.Debugf(format, args...)
+}
+
+func Info(args ...interface{}) {
+	logger.Info(args...)
+}
+
+func Infof(format string, args ...interface{}) {
+	logger.Infof(format, args...)
+}
+
+func Warning(args ...interface{}) {
+	logger.Warning(args...)
+}
+
+func Warningf(format string, args ...interface{}) {
+	logger.Warningf(format, args...)
+}
+
+func Error(args ...interface{}) {
+	logger.Error(args...)
+}
+
+func Errorf(format string, args ...interface{}) {
+	logger.Errorf(format, args...)
+}

main.go

@@ -0,0 +1,302 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+	_ "unsafe"
+	"x-ui/config"
+	"x-ui/database"
+	"x-ui/logger"
+	"x-ui/v2ui"
+	"x-ui/web"
+	"x-ui/web/global"
+	"x-ui/web/service"
+
+	"github.com/op/go-logging"
+)
+
+func runWebServer() {
+	log.Printf("%v %v", config.GetName(), config.GetVersion())
+
+	switch config.GetLogLevel() {
+	case config.Debug:
+		logger.InitLogger(logging.DEBUG)
+	case config.Info:
+		logger.InitLogger(logging.INFO)
+	case config.Warn:
+		logger.InitLogger(logging.WARNING)
+	case config.Error:
+		logger.InitLogger(logging.ERROR)
+	default:
+		log.Fatal("unknown log level:", config.GetLogLevel())
+	}
+
+	err := database.InitDB(config.GetDBPath())
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var server *web.Server
+
+	server = web.NewServer()
+	global.SetWebServer(server)
+	err = server.Start()
+	if err != nil {
+		log.Println(err)
+		return
+	}
+
+	sigCh := make(chan os.Signal, 1)
+	//信号量捕获处理
+	signal.Notify(sigCh, syscall.SIGHUP, syscall.SIGTERM, syscall.SIGKILL)
+	for {
+		sig := <-sigCh
+
+		switch sig {
+		case syscall.SIGHUP:
+			err := server.Stop()
+			if err != nil {
+				logger.Warning("stop server err:", err)
+			}
+			server = web.NewServer()
+			global.SetWebServer(server)
+			err = server.Start()
+			if err != nil {
+				log.Println(err)
+				return
+			}
+		default:
+			server.Stop()
+			return
+		}
+	}
+}
+
+func resetSetting() {
+	err := database.InitDB(config.GetDBPath())
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	settingService := service.SettingService{}
+	err = settingService.ResetSettings()
+	if err != nil {
+		fmt.Println("reset setting failed:", err)
+	} else {
+		fmt.Println("reset setting success")
+	}
+}
+
+func showSetting(show bool) {
+	if show {
+		settingService := service.SettingService{}
+		port, err := settingService.GetPort()
+		if err != nil {
+			fmt.Println("get current port fialed,error info:", err)
+		}
+		userService := service.UserService{}
+		userModel, err := userService.GetFirstUser()
+		if err != nil {
+			fmt.Println("get current user info failed,error info:", err)
+		}
+		username := userModel.Username
+		userpasswd := userModel.Password
+		if (username == "") || (userpasswd == "") {
+			fmt.Println("current username or password is empty")
+		}
+		fmt.Println("current pannel settings as follows:")
+		fmt.Println("username:", username)
+		fmt.Println("userpasswd:", userpasswd)
+		fmt.Println("port:", port)
+	}
+}
+
+func updateTgbotEnableSts(status bool) {
+	settingService := service.SettingService{}
+	currentTgSts, err := settingService.GetTgbotenabled()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	logger.Infof("current enabletgbot status[%v],need update to status[%v]", currentTgSts, status)
+	if currentTgSts != status {
+		err := settingService.SetTgbotenabled(status)
+		if err != nil {
+			fmt.Println(err)
+			return
+		} else {
+			logger.Infof("SetTgbotenabled[%v] success", status)
+		}
+	}
+	return
+}
+
+func updateTgbotSetting(tgBotToken string, tgBotChatid int, tgBotRuntime string) {
+	err := database.InitDB(config.GetDBPath())
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	settingService := service.SettingService{}
+
+	if tgBotToken != "" {
+		err := settingService.SetTgBotToken(tgBotToken)
+		if err != nil {
+			fmt.Println(err)
+			return
+		} else {
+			logger.Info("updateTgbotSetting tgBotToken success")
+		}
+	}
+
+	if tgBotRuntime != "" {
+		err := settingService.SetTgbotRuntime(tgBotRuntime)
+		if err != nil {
+			fmt.Println(err)
+			return
+		} else {
+			logger.Infof("updateTgbotSetting tgBotRuntime[%s] success", tgBotRuntime)
+		}
+	}
+
+	if tgBotChatid != 0 {
+		err := settingService.SetTgBotChatId(tgBotChatid)
+		if err != nil {
+			fmt.Println(err)
+			return
+		} else {
+			logger.Info("updateTgbotSetting tgBotChatid success")
+		}
+	}
+}
+
+func updateSetting(port int, username string, password string) {
+	err := database.InitDB(config.GetDBPath())
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	settingService := service.SettingService{}
+
+	if port > 0 {
+		err := settingService.SetPort(port)
+		if err != nil {
+			fmt.Println("set port failed:", err)
+		} else {
+			fmt.Printf("set port %v success", port)
+		}
+	}
+	if username != "" || password != "" {
+		userService := service.UserService{}
+		err := userService.UpdateFirstUser(username, password)
+		if err != nil {
+			fmt.Println("set username and password failed:", err)
+		} else {
+			fmt.Println("set username and password success")
+		}
+	}
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		runWebServer()
+		return
+	}
+
+	var showVersion bool
+	flag.BoolVar(&showVersion, "v", false, "show version")
+
+	runCmd := flag.NewFlagSet("run", flag.ExitOnError)
+
+	v2uiCmd := flag.NewFlagSet("v2-ui", flag.ExitOnError)
+	var dbPath string
+	v2uiCmd.StringVar(&dbPath, "db", "/etc/v2-ui/v2-ui.db", "set v2-ui db file path")
+
+	settingCmd := flag.NewFlagSet("setting", flag.ExitOnError)
+	var port int
+	var username string
+	var password string
+	var tgbottoken string
+	var tgbotchatid int
+	var enabletgbot bool
+	var tgbotRuntime string
+	var reset bool
+	var show bool
+	settingCmd.BoolVar(&reset, "reset", false, "reset all settings")
+	settingCmd.BoolVar(&show, "show", false, "show current settings")
+	settingCmd.IntVar(&port, "port", 0, "set panel port")
+	settingCmd.StringVar(&username, "username", "", "set login username")
+	settingCmd.StringVar(&password, "password", "", "set login password")
+	settingCmd.StringVar(&tgbottoken, "tgbottoken", "", "set telegrame bot token")
+	settingCmd.StringVar(&tgbotRuntime, "tgbotRuntime", "", "set telegrame bot cron time")
+	settingCmd.IntVar(&tgbotchatid, "tgbotchatid", 0, "set telegrame bot chat id")
+	settingCmd.BoolVar(&enabletgbot, "enabletgbot", false, "enable telegram bot notify")
+
+	oldUsage := flag.Usage
+	flag.Usage = func() {
+		oldUsage()
+		fmt.Println()
+		fmt.Println("Commands:")
+		fmt.Println("    run            run web panel")
+		fmt.Println("    v2-ui          migrate form v2-ui")
+		fmt.Println("    setting        set settings")
+	}
+
+	flag.Parse()
+	if showVersion {
+		fmt.Println(config.GetVersion())
+		return
+	}
+
+	switch os.Args[1] {
+	case "run":
+		err := runCmd.Parse(os.Args[2:])
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		runWebServer()
+	case "v2-ui":
+		err := v2uiCmd.Parse(os.Args[2:])
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		err = v2ui.MigrateFromV2UI(dbPath)
+		if err != nil {
+			fmt.Println("migrate from v2-ui failed:", err)
+		}
+	case "setting":
+		err := settingCmd.Parse(os.Args[2:])
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		if reset {
+			resetSetting()
+		} else {
+			updateSetting(port, username, password)
+		}
+		if show {
+			showSetting(show)
+		}
+		if (tgbottoken != "") || (tgbotchatid != 0) || (tgbotRuntime != "") {
+			updateTgbotSetting(tgbottoken, tgbotchatid, tgbotRuntime)
+		}
+	default:
+		fmt.Println("except 'run' or 'v2-ui' or 'setting' subcommands")
+		fmt.Println()
+		runCmd.Usage()
+		fmt.Println()
+		v2uiCmd.Usage()
+		fmt.Println()
+		settingCmd.Usage()
+	}
+}

util/common/err.go

@@ -0,0 +1,29 @@
+package common
+
+import (
+	"errors"
+	"fmt"
+	"x-ui/logger"
+)
+
+var CtxDone = errors.New("context done")
+
+func NewErrorf(format string, a ...interface{}) error {
+	msg := fmt.Sprintf(format, a...)
+	return errors.New(msg)
+}
+
+func NewError(a ...interface{}) error {
+	msg := fmt.Sprintln(a...)
+	return errors.New(msg)
+}
+
+func Recover(msg string) interface{} {
+	panicErr := recover()
+	if panicErr != nil {
+		if msg != "" {
+			logger.Error(msg, "panic:", panicErr)
+		}
+	}
+	return panicErr
+}

util/common/format.go

@@ -0,0 +1,21 @@
+package common
+
+import (
+	"fmt"
+)
+
+func FormatTraffic(trafficBytes int64) (size string) {
+	if trafficBytes < 1024 {
+		return fmt.Sprintf("%.2fB", float64(trafficBytes)/float64(1))
+	} else if trafficBytes < (1024 * 1024) {
+		return fmt.Sprintf("%.2fKB", float64(trafficBytes)/float64(1024))
+	} else if trafficBytes < (1024 * 1024 * 1024) {
+		return fmt.Sprintf("%.2fMB", float64(trafficBytes)/float64(1024*1024))
+	} else if trafficBytes < (1024 * 1024 * 1024 * 1024) {
+		return fmt.Sprintf("%.2fGB", float64(trafficBytes)/float64(1024*1024*1024))
+	} else if trafficBytes < (1024 * 1024 * 1024 * 1024 * 1024) {
+		return fmt.Sprintf("%.2fTB", float64(trafficBytes)/float64(1024*1024*1024*1024))
+	} else {
+		return fmt.Sprintf("%.2fEB", float64(trafficBytes)/float64(1024*1024*1024*1024*1024))
+	}
+}

util/common/multi_error.go

@@ -0,0 +1,30 @@
+package common
+
+import (
+	"strings"
+)
+
+type multiError []error
+
+func (e multiError) Error() string {
+	var r strings.Builder
+	r.WriteString("multierr: ")
+	for _, err := range e {
+		r.WriteString(err.Error())
+		r.WriteString(" | ")
+	}
+	return r.String()
+}
+
+func Combine(maybeError ...error) error {
+	var errs multiError
+	for _, err := range maybeError {
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) == 0 {
+		return nil
+	}
+	return errs
+}

util/common/stringUtil.go

@@ -0,0 +1,9 @@
+package common
+
+import "sort"
+
+func IsSubString(target string, str_array []string) bool {
+	sort.Strings(str_array)
+	index := sort.SearchStrings(str_array, target)
+	return index < len(str_array) && str_array[index] == target
+}

util/context.go

@@ -0,0 +1,12 @@
+package util
+
+import "context"
+
+func IsDone(ctx context.Context) bool {
+	select {
+	case <-ctx.Done():
+		return true
+	default:
+		return false
+	}
+}

util/json_util/json.go

@@ -0,0 +1,24 @@
+package json_util
+
+import (
+	"errors"
+)
+
+type RawMessage []byte
+
+// MarshalJSON 自定义 json.RawMessage 默认行为
+func (m RawMessage) MarshalJSON() ([]byte, error) {
+	if len(m) == 0 {
+		return []byte("null"), nil
+	}
+	return m, nil
+}
+
+// UnmarshalJSON sets *m to a copy of data.
+func (m *RawMessage) UnmarshalJSON(data []byte) error {
+	if m == nil {
+		return errors.New("json.RawMessage: UnmarshalJSON on nil pointer")
+	}
+	*m = append((*m)[0:0], data...)
+	return nil
+}

util/random/random.go

@@ -0,0 +1,43 @@
+package random
+
+import (
+	"math/rand"
+	"time"
+)
+
+var numSeq [10]rune
+var lowerSeq [26]rune
+var upperSeq [26]rune
+var numLowerSeq [36]rune
+var numUpperSeq [36]rune
+var allSeq [62]rune
+
+func init() {
+	rand.Seed(time.Now().UnixNano())
+
+	for i := 0; i < 10; i++ {
+		numSeq[i] = rune('0' + i)
+	}
+	for i := 0; i < 26; i++ {
+		lowerSeq[i] = rune('a' + i)
+		upperSeq[i] = rune('A' + i)
+	}
+
+	copy(numLowerSeq[:], numSeq[:])
+	copy(numLowerSeq[len(numSeq):], lowerSeq[:])
+
+	copy(numUpperSeq[:], numSeq[:])
+	copy(numUpperSeq[len(numSeq):], upperSeq[:])
+
+	copy(allSeq[:], numSeq[:])
+	copy(allSeq[len(numSeq):], lowerSeq[:])
+	copy(allSeq[len(numSeq)+len(lowerSeq):], upperSeq[:])
+}
+
+func Seq(n int) string {
+	runes := make([]rune, n)
+	for i := 0; i < n; i++ {
+		runes[i] = allSeq[rand.Intn(len(allSeq))]
+	}
+	return string(runes)
+}

util/reflect_util/reflect.go

@@ -0,0 +1,21 @@
+package reflect_util
+
+import "reflect"
+
+func GetFields(t reflect.Type) []reflect.StructField {
+	num := t.NumField()
+	fields := make([]reflect.StructField, 0, num)
+	for i := 0; i < num; i++ {
+		fields = append(fields, t.Field(i))
+	}
+	return fields
+}
+
+func GetFieldValues(v reflect.Value) []reflect.Value {
+	num := v.NumField()
+	fields := make([]reflect.Value, 0, num)
+	for i := 0; i < num; i++ {
+		fields = append(fields, v.Field(i))
+	}
+	return fields
+}

util/sys/psutil.go

@@ -0,0 +1,8 @@
+package sys
+
+import (
+	_ "unsafe"
+)
+
+//go:linkname HostProc github.com/shirou/gopsutil/internal/common.HostProc
+func HostProc(combineWith ...string) string

util/sys/sys_darwin.go

@@ -0,0 +1,23 @@
+// +build darwin
+
+package sys
+
+import (
+	"github.com/shirou/gopsutil/net"
+)
+
+func GetTCPCount() (int, error) {
+	stats, err := net.Connections("tcp")
+	if err != nil {
+		return 0, err
+	}
+	return len(stats), nil
+}
+
+func GetUDPCount() (int, error) {
+	stats, err := net.Connections("udp")
+	if err != nil {
+		return 0, err
+	}
+	return len(stats), nil
+}

util/sys/sys_linux.go

@@ -0,0 +1,70 @@
+// +build linux
+
+package sys
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+)
+
+func getLinesNum(filename string) (int, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return 0, err
+	}
+	defer file.Close()
+
+	sum := 0
+	buf := make([]byte, 8192)
+	for {
+		n, err := file.Read(buf)
+
+		var buffPosition int
+		for {
+			i := bytes.IndexByte(buf[buffPosition:], '\n')
+			if i < 0 || n == buffPosition {
+				break
+			}
+			buffPosition += i + 1
+			sum++
+		}
+
+		if err == io.EOF {
+			return sum, nil
+		} else if err != nil {
+			return sum, err
+		}
+	}
+}
+
+func GetTCPCount() (int, error) {
+	root := HostProc()
+
+	tcp4, err := getLinesNum(fmt.Sprintf("%v/net/tcp", root))
+	if err != nil {
+		return tcp4, err
+	}
+	tcp6, err := getLinesNum(fmt.Sprintf("%v/net/tcp6", root))
+	if err != nil {
+		return tcp4 + tcp6, nil
+	}
+
+	return tcp4 + tcp6, nil
+}
+
+func GetUDPCount() (int, error) {
+	root := HostProc()
+
+	udp4, err := getLinesNum(fmt.Sprintf("%v/net/udp", root))
+	if err != nil {
+		return udp4, err
+	}
+	udp6, err := getLinesNum(fmt.Sprintf("%v/net/udp6", root))
+	if err != nil {
+		return udp4 + udp6, nil
+	}
+
+	return udp4 + udp6, nil
+}

v2ui/db.go

@@ -0,0 +1,28 @@
+package v2ui
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+var v2db *gorm.DB
+
+func initDB(dbPath string) error {
+	c := &gorm.Config{
+		Logger: logger.Discard,
+	}
+	var err error
+	v2db, err = gorm.Open(sqlite.Open(dbPath), c)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func getV2Inbounds() ([]*V2Inbound, error) {
+	inbounds := make([]*V2Inbound, 0)
+	err := v2db.Model(V2Inbound{}).Find(&inbounds).Error
+	return inbounds, err
+}

v2ui/models.go

@@ -0,0 +1,41 @@
+package v2ui
+
+import "x-ui/database/model"
+
+type V2Inbound struct {
+	Id             int `gorm:"primaryKey;autoIncrement"`
+	Port           int `gorm:"unique"`
+	Listen         string
+	Protocol       string
+	Settings       string
+	StreamSettings string
+	Tag            string `gorm:"unique"`
+	Sniffing       string
+	Remark         string
+	Up             int64
+	Down           int64
+	Enable         bool
+}
+
+func (i *V2Inbound) TableName() string {
+	return "inbound"
+}
+
+func (i *V2Inbound) ToInbound(userId int) *model.Inbound {
+	return &model.Inbound{
+		UserId:         userId,
+		Up:             i.Up,
+		Down:           i.Down,
+		Total:          0,
+		Remark:         i.Remark,
+		Enable:         i.Enable,
+		ExpiryTime:     0,
+		Listen:         i.Listen,
+		Port:           i.Port,
+		Protocol:       model.Protocol(i.Protocol),
+		Settings:       i.Settings,
+		StreamSettings: i.StreamSettings,
+		Tag:            i.Tag,
+		Sniffing:       i.Sniffing,
+	}
+}

v2ui/v2ui.go

@@ -0,0 +1,51 @@
+package v2ui
+
+import (
+	"fmt"
+	"x-ui/config"
+	"x-ui/database"
+	"x-ui/database/model"
+	"x-ui/util/common"
+	"x-ui/web/service"
+)
+
+func MigrateFromV2UI(dbPath string) error {
+	err := initDB(dbPath)
+	if err != nil {
+		return common.NewError("init v2-ui database failed:", err)
+	}
+	err = database.InitDB(config.GetDBPath())
+	if err != nil {
+		return common.NewError("init x-ui database failed:", err)
+	}
+
+	v2Inbounds, err := getV2Inbounds()
+	if err != nil {
+		return common.NewError("get v2-ui inbounds failed:", err)
+	}
+	if len(v2Inbounds) == 0 {
+		fmt.Println("migrate v2-ui inbounds success: 0")
+		return nil
+	}
+
+	userService := service.UserService{}
+	user, err := userService.GetFirstUser()
+	if err != nil {
+		return common.NewError("get x-ui user failed:", err)
+	}
+
+	inbounds := make([]*model.Inbound, 0)
+	for _, v2inbound := range v2Inbounds {
+		inbounds = append(inbounds, v2inbound.ToInbound(user.Id))
+	}
+
+	inboundService := service.InboundService{}
+	err = inboundService.AddInbounds(inbounds)
+	if err != nil {
+		return common.NewError("add x-ui inbounds failed:", err)
+	}
+
+	fmt.Println("migrate v2-ui inbounds success:", len(inbounds))
+
+	return nil
+}

web/assets/[email protected]/antd.less

@@ -0,0 +1,2 @@
+@import "../lib/style/index.less";
+@import "../lib/style/components.less";

web/assets/css/custom.css

@@ -0,0 +1,152 @@
+#app {
+    height: 100%;
+}
+
+.ant-space {
+    width: 100%;
+}
+
+.ant-layout-sider-zero-width-trigger {
+    display: none;
+}
+
+.ant-card {
+    border-radius: 30px;
+}
+
+.ant-card-hoverable {
+    cursor: auto;
+}
+
+.ant-card+.ant-card {
+    margin-top: 20px;
+}
+
+.drawer-handle {
+    position: absolute;
+    top: 72px;
+    width: 41px;
+    height: 40px;
+    cursor: pointer;
+    z-index: 0;
+    text-align: center;
+    line-height: 40px;
+    font-size: 16px;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    background: #fff;
+    right: -40px;
+    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.15);
+    border-radius: 0 4px 4px 0;
+}
+
+@media (min-width: 769px) {
+    .drawer-handle {
+        display: none;
+    }
+}
+
+.fade-in-enter, .fade-in-leave-active, .fade-in-linear-enter, .fade-in-linear-leave, .fade-in-linear-leave-active, .fade-in-linear-enter, .fade-in-linear-leave, .fade-in-linear-leave-active {
+    opacity: 0
+}
+
+.fade-in-linear-enter-active, .fade-in-linear-leave-active {
+    -webkit-transition: opacity .2s linear;
+    transition: opacity .2s linear
+}
+
+.fade-in-linear-enter-active, .fade-in-linear-leave-active {
+    -webkit-transition: opacity .2s linear;
+    transition: opacity .2s linear
+}
+
+.fade-in-enter-active, .fade-in-leave-active {
+    -webkit-transition: all .3s cubic-bezier(.55, 0, .1, 1);
+    transition: all .3s cubic-bezier(.55, 0, .1, 1)
+}
+
+.zoom-in-center-enter-active, .zoom-in-center-leave-active {
+    -webkit-transition: all .3s cubic-bezier(.55, 0, .1, 1);
+    transition: all .3s cubic-bezier(.55, 0, .1, 1)
+}
+
+.zoom-in-center-enter, .zoom-in-center-leave-active {
+    opacity: 0;
+    -webkit-transform: scaleX(0);
+    transform: scaleX(0)
+}
+
+.zoom-in-top-enter-active, .zoom-in-top-leave-active {
+    opacity: 1;
+    -webkit-transform: scaleY(1);
+    transform: scaleY(1);
+    -webkit-transition: opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    transition: opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    transition: transform .3s cubic-bezier(.23, 1, .32, 1), opacity .3s cubic-bezier(.23, 1, .32, 1);
+    transition: transform .3s cubic-bezier(.23, 1, .32, 1), opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    -webkit-transform-origin: center top;
+    transform-origin: center top
+}
+
+.zoom-in-top-enter, .zoom-in-top-leave-active {
+    opacity: 0;
+    -webkit-transform: scaleY(0);
+    transform: scaleY(0)
+}
+
+.zoom-in-bottom-enter-active, .zoom-in-bottom-leave-active {
+    opacity: 1;
+    -webkit-transform: scaleY(1);
+    transform: scaleY(1);
+    -webkit-transition: opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    transition: opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    transition: transform .3s cubic-bezier(.23, 1, .32, 1), opacity .3s cubic-bezier(.23, 1, .32, 1);
+    transition: transform .3s cubic-bezier(.23, 1, .32, 1), opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    -webkit-transform-origin: center bottom;
+    transform-origin: center bottom
+}
+
+.zoom-in-bottom-enter, .zoom-in-bottom-leave-active {
+    opacity: 0;
+    -webkit-transform: scaleY(0);
+    transform: scaleY(0)
+}
+
+.zoom-in-left-enter-active, .zoom-in-left-leave-active {
+    opacity: 1;
+    -webkit-transform: scale(1, 1);
+    transform: scale(1, 1);
+    -webkit-transition: opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    transition: opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    transition: transform .3s cubic-bezier(.23, 1, .32, 1), opacity .3s cubic-bezier(.23, 1, .32, 1);
+    transition: transform .3s cubic-bezier(.23, 1, .32, 1), opacity .3s cubic-bezier(.23, 1, .32, 1), -webkit-transform .3s cubic-bezier(.23, 1, .32, 1);
+    -webkit-transform-origin: top left;
+    transform-origin: top left
+}
+
+.zoom-in-left-enter, .zoom-in-left-leave-active {
+    opacity: 0;
+    -webkit-transform: scale(.45, .45);
+    transform: scale(.45, .45)
+}
+
+.list-enter-active, .list-leave-active {
+    -webkit-transition: all .3s;
+    transition: all .3s
+}
+
+.list-enter, .list-leave-active {
+    opacity: 0;
+    -webkit-transform: translateY(-30px);
+    transform: translateY(-30px)
+}
+
+.ant-progress-inner {
+    background-color: #EBEEF5;
+}
+
+.deactive-client .ant-collapse-header{
+    color:rgb(255, 255, 255) !important;
+    background-color: rgb(255, 127, 127);
+}

web/assets/[email protected]/theme-chalk/display.css

@@ -0,0 +1 @@
+@media only screen and (max-width:767px){.hidden-xs-only{display:none!important}}@media only screen and (min-width:768px){.hidden-sm-and-up{display:none!important}}@media only screen and (min-width:768px) and (max-width:991px){.hidden-sm-only{display:none!important}}@media only screen and (max-width:991px){.hidden-sm-and-down{display:none!important}}@media only screen and (min-width:992px){.hidden-md-and-up{display:none!important}}@media only screen and (min-width:992px) and (max-width:1199px){.hidden-md-only{display:none!important}}@media only screen and (max-width:1199px){.hidden-md-and-down{display:none!important}}@media only screen and (min-width:1200px){.hidden-lg-and-up{display:none!important}}@media only screen and (min-width:1200px) and (max-width:1919px){.hidden-lg-only{display:none!important}}@media only screen and (max-width:1919px){.hidden-lg-and-down{display:none!important}}@media only screen and (min-width:1920px){.hidden-xl-only{display:none!important}}

web/assets/js/axios-init.js

@@ -0,0 +1,12 @@
+axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
+axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
+
+axios.interceptors.request.use(
+    config => {
+        config.data = Qs.stringify(config.data, {
+            arrayFormat: 'repeat'
+        });
+        return config;
+    },
+    error => Promise.reject(error)
+);

web/assets/js/langs.js

@@ -0,0 +1,84 @@
+supportLangs = [
+    {
+       name : "English",
+       value : "en-US",
+       icon : "🇺🇸"
+    },
+	{
+        name : "Farsi",
+        value : "fa_IR",
+        icon : "🇮🇷"
+    },
+    {
+        name : "汉语",
+        value : "zh-Hans",
+        icon : "🇨🇳"
+    },
+]
+
+function getLang(){
+    let lang = getCookie('lang')
+
+    if (! lang){
+        if (window.navigator){
+            lang = window.navigator.language || window.navigator.userLanguage;
+
+            if (isSupportLang(lang)){
+                setCookie('lang' , lang , 150)
+            }else{
+                setCookie('lang' , 'en-US' , 150)
+                window.location.reload();
+            }
+        }else{
+            setCookie('lang' , 'en-US' , 150)
+            window.location.reload();
+        }
+    }
+
+    return lang;
+}
+
+function setLang(lang){
+
+    if (!isSupportLang(lang)){
+        lang = 'en-US';
+    }
+
+    setCookie('lang' , lang , 150)
+    window.location.reload();
+}
+
+function isSupportLang(lang){
+    for (l of supportLangs){
+        if (l.value === lang){
+            return true;
+        }
+    }
+
+    return false;
+}
+
+
+
+function getCookie(cname) {
+    let name = cname + "=";
+    let decodedCookie = decodeURIComponent(document.cookie);
+    let ca = decodedCookie.split(';');
+    for(let i = 0; i <ca.length; i++) {
+        let c = ca[i];
+        while (c.charAt(0) == ' ') {
+            c = c.substring(1);
+        }
+        if (c.indexOf(name) == 0) {
+            return c.substring(name.length, c.length);
+        }
+    }
+    return "";
+}
+
+function setCookie(cname, cvalue, exdays) {
+    const d = new Date();
+    d.setTime(d.getTime() + (exdays*24*60*60*1000));
+    let expires = "expires="+ d.toUTCString();
+    document.cookie =  cname + "=" + cvalue + ";" + expires + ";path=/";
+}

web/assets/js/model/models.js

@@ -0,0 +1,185 @@
+class User {
+
+    constructor() {
+        this.username = "";
+        this.password = "";
+    }
+}
+
+class Msg {
+
+    constructor(success, msg, obj) {
+        this.success = false;
+        this.msg = "";
+        this.obj = null;
+
+        if (success != null) {
+            this.success = success;
+        }
+        if (msg != null) {
+            this.msg = msg;
+        }
+        if (obj != null) {
+            this.obj = obj;
+        }
+    }
+}
+
+class DBInbound {
+
+    constructor(data) {
+        this.id = 0;
+        this.userId = 0;
+        this.up = 0;
+        this.down = 0;
+        this.total = 0;
+        this.remark = "";
+        this.enable = true;
+        this.expiryTime = 0;
+
+        this.listen = "";
+        this.port = 0;
+        this.protocol = "";
+        this.settings = "";
+        this.streamSettings = "";
+        this.tag = "";
+        this.sniffing = "";
+        this.clientStats = ""
+        if (data == null) {
+            return;
+        }
+        ObjectUtil.cloneProps(this, data);
+    }
+
+    get totalGB() {
+        return toFixed(this.total / ONE_GB, 2);
+    }
+
+    set totalGB(gb) {
+        this.total = toFixed(gb * ONE_GB, 0);
+    }
+
+    get isVMess() {
+        return this.protocol === Protocols.VMESS;
+    }
+
+    get isVLess() {
+        return this.protocol === Protocols.VLESS;
+    }
+
+    get isTrojan() {
+        return this.protocol === Protocols.TROJAN;
+    }
+
+    get isSS() {
+        return this.protocol === Protocols.SHADOWSOCKS;
+    }
+
+    get isSocks() {
+        return this.protocol === Protocols.SOCKS;
+    }
+
+    get isHTTP() {
+        return this.protocol === Protocols.HTTP;
+    }
+
+    get address() {
+        let address = location.hostname;
+        if (!ObjectUtil.isEmpty(this.listen) && this.listen !== "0.0.0.0") {
+            address = this.listen;
+        }
+        return address;
+    }
+
+    get _expiryTime() {
+        if (this.expiryTime === 0) {
+            return null;
+        }
+        return moment(this.expiryTime);
+    }
+
+    set _expiryTime(t) {
+        if (t == null) {
+            this.expiryTime = 0;
+        } else {
+            this.expiryTime = t.valueOf();
+        }
+    }
+
+    get isExpiry() {
+        return this.expiryTime < new Date().getTime();
+    }
+
+    toInbound() {
+        let settings = {};
+        if (!ObjectUtil.isEmpty(this.settings)) {
+            settings = JSON.parse(this.settings);
+        }
+
+        let streamSettings = {};
+        if (!ObjectUtil.isEmpty(this.streamSettings)) {
+            streamSettings = JSON.parse(this.streamSettings);
+        }
+
+        let sniffing = {};
+        if (!ObjectUtil.isEmpty(this.sniffing)) {
+            sniffing = JSON.parse(this.sniffing);
+        }
+
+        const config = {
+            port: this.port,
+            listen: this.listen,
+            protocol: this.protocol,
+            settings: settings,
+            streamSettings: streamSettings,
+            tag: this.tag,
+            sniffing: sniffing,
+            clientStats: this.clientStats,
+        };
+        return Inbound.fromJson(config);
+    }
+
+    hasLink() {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+            case Protocols.VLESS:
+            case Protocols.TROJAN:
+            case Protocols.SHADOWSOCKS:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    genLink() {
+        const inbound = this.toInbound();
+        return inbound.genLink(this.address, this.remark);
+    }
+}
+
+class AllSetting {
+
+    constructor(data) {
+        this.webListen = "";
+        this.webPort = 54321;
+        this.webCertFile = "";
+        this.webKeyFile = "";
+        this.webBasePath = "/";
+        this.tgBotEnable = false;
+        this.tgBotToken = "";
+        this.tgBotChatId = 0;
+        this.tgRunTime = "";
+        this.xrayTemplateConfig = "";
+
+        this.timeLocation = "Asia/Shanghai";
+
+        if (data == null) {
+            return
+        }
+        ObjectUtil.cloneProps(this, data);
+    }
+
+    equals(other) {
+        return ObjectUtil.equals(this, other);
+    }
+}

web/assets/js/model/xray.js

@@ -0,0 +1,1819 @@
+const Protocols = {
+    VMESS: 'vmess',
+    VLESS: 'vless',
+    TROJAN: 'trojan',
+    SHADOWSOCKS: 'shadowsocks',
+    DOKODEMO: 'dokodemo-door',
+    MTPROTO: 'mtproto',
+    SOCKS: 'socks',
+    HTTP: 'http',
+};
+
+const VmessMethods = {
+    AES_128_GCM: 'aes-128-gcm',
+    CHACHA20_POLY1305: 'chacha20-poly1305',
+    AUTO: 'auto',
+    NONE: 'none',
+};
+
+const SSMethods = {
+    // AES_256_CFB: 'aes-256-cfb',
+    // AES_128_CFB: 'aes-128-cfb',
+    // CHACHA20: 'chacha20',
+    // CHACHA20_IETF: 'chacha20-ietf',
+    CHACHA20_POLY1305: 'chacha20-poly1305',
+    AES_256_GCM: 'aes-256-gcm',
+    AES_128_GCM: 'aes-128-gcm',
+	BLAKE3_AES_128_GCM: '2022-blake3-aes-128-gcm',
+    BLAKE3_AES_256_GCM: '2022-blake3-aes-256-gcm',
+    BLAKE3_CHACHA20_POLY1305: '2022-blake3-chacha20-poly1305',
+};
+
+const RULE_IP = {
+    PRIVATE: 'geoip:private',
+    CN: 'geoip:cn',
+};
+
+const RULE_DOMAIN = {
+    ADS: 'geosite:category-ads',
+    ADS_ALL: 'geosite:category-ads-all',
+    CN: 'geosite:cn',
+    GOOGLE: 'geosite:google',
+    FACEBOOK: 'geosite:facebook',
+    SPEEDTEST: 'geosite:speedtest',
+};
+
+const XTLS_FLOW_CONTROL = {
+    ORIGIN: "xtls-rprx-origin",
+    DIRECT: "xtls-rprx-direct",
+};
+
+const TLS_FLOW_CONTROL = {
+    VISION: "xtls-rprx-vision",
+};
+
+const TLS_VERSION_OPTION = {
+    TLS10: "1.0",
+    TLS11: "1.1",
+    TLS12: "1.2",
+    TLS13: "1.3",
+}
+
+const TLS_CIPHER_OPTION = {
+    RSA_AES_128_CBC: "TLS_RSA_WITH_AES_128_CBC_SHA",
+    RSA_AES_256_CBC: "TLS_RSA_WITH_AES_256_CBC_SHA",
+    RSA_AES_128_GCM: "TLS_RSA_WITH_AES_128_GCM_SHA256",
+    RSA_AES_256_GCM: "TLS_RSA_WITH_AES_256_GCM_SHA384",
+    AES_128_GCM: "TLS_AES_128_GCM_SHA256",
+    AES_256_GCM: "TLS_AES_256_GCM_SHA384",
+    CHACHA20_POLY1305: "TLS_CHACHA20_POLY1305_SHA256",
+    ECDHE_ECDSA_AES_128_CBC: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
+    ECDHE_ECDSA_AES_256_CBC: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
+    ECDHE_RSA_AES_128_CBC: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
+    ECDHE_RSA_AES_256_CBC: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
+    ECDHE_ECDSA_AES_128_GCM: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
+    ECDHE_ECDSA_AES_256_GCM: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
+    ECDHE_RSA_AES_128_GCM: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
+    ECDHE_RSA_AES_256_GCM: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
+    ECDHE_ECDSA_CHACHA20_POLY1305: "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
+    ECDHE_RSA_CHACHA20_POLY1305: "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
+};
+
+const UTLS_FINGERPRINT = {
+    UTLS_CHROME: "chrome",
+    UTLS_FIREFOX: "firefox",
+    UTLS_SAFARI: "safari",
+    UTLS_IOS: "ios",
+    UTLS_android: "android",
+    UTLS_EDGE: "edge",
+    UTLS_360: "360",
+    UTLS_QQ: "qq",
+    UTLS_RANDOM: "random",
+    UTLS_RANDOMIZED: "randomized",
+};
+
+Object.freeze(Protocols);
+Object.freeze(VmessMethods);
+Object.freeze(SSMethods);
+Object.freeze(RULE_IP);
+Object.freeze(RULE_DOMAIN);
+Object.freeze(XTLS_FLOW_CONTROL);
+Object.freeze(TLS_FLOW_CONTROL);
+Object.freeze(TLS_VERSION_OPTION);
+Object.freeze(TLS_CIPHER_OPTION);
+
+class XrayCommonClass {
+
+    static toJsonArray(arr) {
+        return arr.map(obj => obj.toJson());
+    }
+
+    static fromJson() {
+        return new XrayCommonClass();
+    }
+
+    toJson() {
+        return this;
+    }
+
+    toString(format=true) {
+        return format ? JSON.stringify(this.toJson(), null, 2) : JSON.stringify(this.toJson());
+    }
+
+    static toHeaders(v2Headers) {
+        let newHeaders = [];
+        if (v2Headers) {
+            Object.keys(v2Headers).forEach(key => {
+                let values = v2Headers[key];
+                if (typeof(values) === 'string') {
+                    newHeaders.push({ name: key, value: values });
+                } else {
+                    for (let i = 0; i < values.length; ++i) {
+                        newHeaders.push({ name: key, value: values[i] });
+                    }
+                }
+            });
+        }
+        return newHeaders;
+    }
+
+    static toV2Headers(headers, arr=true) {
+        let v2Headers = {};
+        for (let i = 0; i < headers.length; ++i) {
+            let name = headers[i].name;
+            let value = headers[i].value;
+            if (ObjectUtil.isEmpty(name) || ObjectUtil.isEmpty(value)) {
+                continue;
+            }
+            if (!(name in v2Headers)) {
+                v2Headers[name] = arr ? [value] : value;
+            } else {
+                if (arr) {
+                    v2Headers[name].push(value);
+                } else {
+                    v2Headers[name] = value;
+                }
+            }
+        }
+        return v2Headers;
+    }
+}
+
+class TcpStreamSettings extends XrayCommonClass {
+    constructor(
+        type = 'none',
+        acceptProxyProtocol = false,
+        request = new TcpStreamSettings.TcpRequest(),
+        response = new TcpStreamSettings.TcpResponse(),
+    ) {
+        super();
+        this.type = type;
+        this.request = request;
+        this.response = response;
+        this.acceptProxyProtocol = acceptProxyProtocol;
+    }
+
+    static fromJson(json = {}) {
+        let header = json.header;
+        if (!header) {
+            header = {};
+        }
+        return new TcpStreamSettings(
+            header.type,
+            json.acceptProxyProtocol,
+            TcpStreamSettings.TcpRequest.fromJson(header.request),
+            TcpStreamSettings.TcpResponse.fromJson(header.response),
+        );
+    }
+
+    toJson() {
+        return {
+            header: {
+                type: this.type,
+                request: this.type === 'http' ? this.request.toJson() : undefined,
+                response: this.type === 'http' ? this.response.toJson() : undefined,
+            },
+            acceptProxyProtocol: this.acceptProxyProtocol,
+        };
+    }
+}
+
+TcpStreamSettings.TcpRequest = class extends XrayCommonClass {
+    constructor(version = '1.1',
+        method = 'GET',
+        path = ['/'],
+        headers = [],
+    ) {
+        super();
+        this.version = version;
+        this.method = method;
+        this.path = path.length === 0 ? ['/'] : path;
+        this.headers = headers;
+    }
+
+    addPath(path) {
+        this.path.push(path);
+    }
+
+    removePath(index) {
+        this.path.splice(index, 1);
+    }
+
+    addHeader(name, value) {
+        this.headers.push({ name: name, value: value });
+    }
+
+    getHeader(name) {
+        for (const header of this.headers) {
+            if (header.name.toLowerCase() === name.toLowerCase()) {
+                return header.value;
+            }
+        }
+        return null;
+    }
+
+    removeHeader(index) {
+        this.headers.splice(index, 1);
+    }
+
+    static fromJson(json = {}) {
+        return new TcpStreamSettings.TcpRequest(
+            json.version,
+            json.method,
+            json.path,
+            XrayCommonClass.toHeaders(json.headers),
+        );
+    }
+
+    toJson() {
+        return {
+            method: this.method,
+            path: ObjectUtil.clone(this.path),
+            headers: XrayCommonClass.toV2Headers(this.headers),
+        };
+    }
+};
+
+TcpStreamSettings.TcpResponse = class extends XrayCommonClass {
+    constructor(version = '1.1',
+        status = '200',
+        reason = 'OK',
+        headers = [],
+    ) {
+        super();
+        this.version = version;
+        this.status = status;
+        this.reason = reason;
+        this.headers = headers;
+    }
+
+    addHeader(name, value) {
+        this.headers.push({ name: name, value: value });
+    }
+
+    removeHeader(index) {
+        this.headers.splice(index, 1);
+    }
+
+    static fromJson(json = {}) {
+        return new TcpStreamSettings.TcpResponse(
+            json.version,
+            json.status,
+            json.reason,
+            XrayCommonClass.toHeaders(json.headers),
+        );
+    }
+
+    toJson() {
+        return {
+            version: this.version,
+            status: this.status,
+            reason: this.reason,
+            headers: XrayCommonClass.toV2Headers(this.headers),
+        };
+    }
+};
+
+class KcpStreamSettings extends XrayCommonClass {
+    constructor(mtu=1350, tti=20,
+                uplinkCapacity=5,
+                downlinkCapacity=20,
+                congestion=false,
+                readBufferSize=2,
+                writeBufferSize=2,
+                type='none',
+                seed=RandomUtil.randomSeq(10),
+                ) {
+        super();
+        this.mtu = mtu;
+        this.tti = tti;
+        this.upCap = uplinkCapacity;
+        this.downCap = downlinkCapacity;
+        this.congestion = congestion;
+        this.readBuffer = readBufferSize;
+        this.writeBuffer = writeBufferSize;
+        this.type = type;
+        this.seed = seed;
+    }
+
+    static fromJson(json={}) {
+        return new KcpStreamSettings(
+            json.mtu,
+            json.tti,
+            json.uplinkCapacity,
+            json.downlinkCapacity,
+            json.congestion,
+            json.readBufferSize,
+            json.writeBufferSize,
+            ObjectUtil.isEmpty(json.header) ? 'none' : json.header.type,
+            json.seed,
+        );
+    }
+
+    toJson() {
+        return {
+            mtu: this.mtu,
+            tti: this.tti,
+            uplinkCapacity: this.upCap,
+            downlinkCapacity: this.downCap,
+            congestion: this.congestion,
+            readBufferSize: this.readBuffer,
+            writeBufferSize: this.writeBuffer,
+            header: {
+                type: this.type,
+            },
+            seed: this.seed,
+        };
+    }
+}
+
+class WsStreamSettings extends XrayCommonClass {
+    constructor(acceptProxyProtocol=false, path='/', headers=[]) {
+        super();
+        this.acceptProxyProtocol = acceptProxyProtocol;
+        this.path = path;
+        this.headers = headers;
+    }
+
+    addHeader(name, value) {
+        this.headers.push({ name: name, value: value });
+    }
+
+    getHeader(name) {
+        for (const header of this.headers) {
+            if (header.name.toLowerCase() === name.toLowerCase()) {
+                return header.value;
+            }
+        }
+        return null;
+    }
+
+    removeHeader(index) {
+        this.headers.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        return new WsStreamSettings(
+            json.acceptProxyProtocol,
+            json.path,
+            XrayCommonClass.toHeaders(json.headers),
+        );
+    }
+
+    toJson() {
+        return {
+            acceptProxyProtocol: this.acceptProxyProtocol,
+            path: this.path,
+            headers: XrayCommonClass.toV2Headers(this.headers, false),
+        };
+    }
+}
+
+class HttpStreamSettings extends XrayCommonClass {
+    constructor(path='/', host=['']) {
+        super();
+        this.path = path;
+        this.host = host.length === 0 ? [''] : host;
+    }
+
+    addHost(host) {
+        this.host.push(host);
+    }
+
+    removeHost(index) {
+        this.host.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        return new HttpStreamSettings(json.path, json.host);
+    }
+
+    toJson() {
+        let host = [];
+        for (let i = 0; i < this.host.length; ++i) {
+            if (!ObjectUtil.isEmpty(this.host[i])) {
+                host.push(this.host[i]);
+            }
+        }
+        return {
+            path: this.path,
+            host: host,
+        }
+    }
+}
+
+class QuicStreamSettings extends XrayCommonClass {
+    constructor(security=VmessMethods.NONE,
+                key='', type='none') {
+        super();
+        this.security = security;
+        this.key = key;
+        this.type = type;
+    }
+
+    static fromJson(json={}) {
+        return new QuicStreamSettings(
+            json.security,
+            json.key,
+            json.header ? json.header.type : 'none',
+        );
+    }
+
+    toJson() {
+        return {
+            security: this.security,
+            key: this.key,
+            header: {
+                type: this.type,
+            }
+        }
+    }
+}
+
+class GrpcStreamSettings extends XrayCommonClass {
+    constructor(serviceName="") {
+        super();
+        this.serviceName = serviceName;
+    }
+
+    static fromJson(json={}) {
+        return new GrpcStreamSettings(json.serviceName);
+    }
+
+    toJson() {
+        return {
+            serviceName: this.serviceName,
+        }
+    }
+}
+
+class TlsStreamSettings extends XrayCommonClass {
+    constructor(serverName = '', minVersion = TLS_VERSION_OPTION.TLS12, maxVersion = TLS_VERSION_OPTION.TLS13,
+        cipherSuites = '',
+        certificates = [new TlsStreamSettings.Cert()], alpn = ["h2", "http/1.1"]) {
+        super();
+        this.server = serverName;
+        this.minVersion = minVersion;
+        this.maxVersion = maxVersion;
+        this.cipherSuites = cipherSuites;
+        this.certs = certificates;
+        this.alpn = alpn;
+    }
+
+    addCert(cert) {
+        this.certs.push(cert);
+    }
+
+    removeCert(index) {
+        this.certs.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        let certs;
+        if (!ObjectUtil.isEmpty(json.certificates)) {
+            certs = json.certificates.map(cert => TlsStreamSettings.Cert.fromJson(cert));
+        }
+
+        return new TlsStreamSettings(
+            json.serverName,
+            json.minVersion,
+            json.maxVersion,
+            json.cipherSuites,
+            certs,
+            json.alpn,
+        );
+    }
+
+    toJson() {
+        return {
+            serverName: this.server,
+            minVersion: this.minVersion,
+            maxVersion: this.maxVersion,
+            cipherSuites: this.cipherSuites,
+            certificates: TlsStreamSettings.toJsonArray(this.certs),
+            alpn: this.alpn
+        };
+    }
+}
+
+TlsStreamSettings.Cert = class extends XrayCommonClass {
+    constructor(useFile=true, certificateFile='', keyFile='', certificate='', key='') {
+        super();
+        this.useFile = useFile;
+        this.certFile = certificateFile;
+        this.keyFile = keyFile;
+        this.cert = certificate instanceof Array ? certificate.join('\n') : certificate;
+        this.key = key instanceof Array ? key.join('\n') : key;
+    }
+
+    static fromJson(json={}) {
+        if ('certificateFile' in json && 'keyFile' in json) {
+            return new TlsStreamSettings.Cert(
+                true,
+                json.certificateFile,
+                json.keyFile,
+            );
+        } else {
+            return new TlsStreamSettings.Cert(
+                false, '', '',
+                json.certificate.join('\n'),
+                json.key.join('\n'),
+            );
+        }
+    }
+
+    toJson() {
+        if (this.useFile) {
+            return {
+                certificateFile: this.certFile,
+                keyFile: this.keyFile,
+            };
+        } else {
+            return {
+                certificate: this.cert.split('\n'),
+                key: this.key.split('\n'),
+            };
+        }
+    }
+};
+
+class StreamSettings extends XrayCommonClass {
+    constructor(network='tcp',
+		security='none',
+		tlsSettings=new TlsStreamSettings(),
+		tcpSettings=new TcpStreamSettings(),
+		kcpSettings=new KcpStreamSettings(),
+		wsSettings=new WsStreamSettings(),
+		httpSettings=new HttpStreamSettings(),
+		quicSettings=new QuicStreamSettings(),
+		grpcSettings=new GrpcStreamSettings(),
+		) {
+        super();
+        this.network = network;
+        this.security = security;
+        this.tls = tlsSettings;
+        this.tcp = tcpSettings;
+        this.kcp = kcpSettings;
+        this.ws = wsSettings;
+        this.http = httpSettings;
+        this.quic = quicSettings;
+        this.grpc = grpcSettings;
+    }
+
+    get isTls() {
+        return this.security === 'tls';
+    }
+
+    set isTls(isTls) {
+        if (isTls) {
+            this.security = 'tls';
+        } else {
+            this.security = 'none';
+        }
+    }
+
+    get isXTls() {
+        return this.security === "xtls";
+    }
+
+    set isXTls(isXTls) {
+        if (isXTls) {
+            this.security = 'xtls';
+        } else {
+            this.security = 'none';
+        }
+    }
+
+    static fromJson(json={}) {
+        let tls;
+        if (json.security === "xtls") {
+            tls = TlsStreamSettings.fromJson(json.xtlsSettings);
+        } else {
+            tls = TlsStreamSettings.fromJson(json.tlsSettings);
+        }
+        return new StreamSettings(
+            json.network,
+            json.security,
+            tls,
+            TcpStreamSettings.fromJson(json.tcpSettings),
+            KcpStreamSettings.fromJson(json.kcpSettings),
+            WsStreamSettings.fromJson(json.wsSettings),
+            HttpStreamSettings.fromJson(json.httpSettings),
+            QuicStreamSettings.fromJson(json.quicSettings),
+            GrpcStreamSettings.fromJson(json.grpcSettings),
+        );
+    }
+
+    toJson() {
+        const network = this.network;
+        return {
+            network: network,
+            security: this.security,
+            tlsSettings: this.isTls ? this.tls.toJson() : undefined,
+            xtlsSettings: this.isXTls ? this.tls.toJson() : undefined,
+            tcpSettings: network === 'tcp' ? this.tcp.toJson() : undefined,
+            kcpSettings: network === 'kcp' ? this.kcp.toJson() : undefined,
+            wsSettings: network === 'ws' ? this.ws.toJson() : undefined,
+            httpSettings: network === 'http' ? this.http.toJson() : undefined,
+            quicSettings: network === 'quic' ? this.quic.toJson() : undefined,
+            grpcSettings: network === 'grpc' ? this.grpc.toJson() : undefined,
+        };
+    }
+}
+
+class Sniffing extends XrayCommonClass {
+    constructor(enabled=true, destOverride=['http', 'tls']) {
+        super();
+        this.enabled = enabled;
+        this.destOverride = destOverride;
+    }
+
+    static fromJson(json={}) {
+        let destOverride = ObjectUtil.clone(json.destOverride);
+        if (!ObjectUtil.isEmpty(destOverride) && !ObjectUtil.isArrEmpty(destOverride)) {
+            if (ObjectUtil.isEmpty(destOverride[0])) {
+                destOverride = ['http', 'tls'];
+            }
+        }
+        return new Sniffing(
+            !!json.enabled,
+            destOverride,
+        );
+    }
+}
+
+class Inbound extends XrayCommonClass {
+    constructor(port=RandomUtil.randomIntRange(10000, 60000),
+                listen='',
+                protocol=Protocols.VMESS,
+                settings=null,
+                streamSettings=new StreamSettings(),
+                tag='',
+                sniffing=new Sniffing(),
+                clientStats='',
+                ) {
+        super();
+        this.port = port;
+        this.listen = listen;
+        this._protocol = protocol;
+        this.settings = ObjectUtil.isEmpty(settings) ? Inbound.Settings.getSettings(protocol) : settings;
+        this.stream = streamSettings;
+        this.tag = tag;
+        this.sniffing = sniffing;
+        this.clientStats = clientStats;
+    }
+    getClientStats() {
+        return this.clientStats;
+    }
+
+    get protocol() {
+        return this._protocol;
+    }
+    
+    set protocol(protocol) {
+        this._protocol = protocol;
+        this.settings = Inbound.Settings.getSettings(protocol);
+        if (protocol === Protocols.TROJAN) {
+            this.tls = true;
+        }
+    }
+    get tls() {
+        return this.stream.security === 'tls';
+    }
+
+    set tls(isTls) {
+        if (isTls) {
+            this.stream.security = 'tls';
+        } else {
+            this.stream.security = 'none';
+        }
+    }
+
+    get xtls() {
+        return this.stream.security === 'xtls';
+    }
+
+    set xtls(isXTls) {
+        if (isXTls) {
+            this.stream.security = 'xtls';
+        } else {
+            this.stream.security = 'none';
+        }
+    }
+
+    get network() {
+        return this.stream.network;
+    }
+
+    set network(network) {
+        this.stream.network = network;
+    }
+
+    get isTcp() {
+        return this.network === "tcp";
+    }
+
+    get isWs() {
+        return this.network === "ws";
+    }
+
+    get isKcp() {
+        return this.network === "kcp";
+    }
+
+    get isQuic() {
+        return this.network === "quic"
+    }
+
+    get isGrpc() {
+        return this.network === "grpc";
+    }
+
+    get isH2() {
+        return this.network === "http";
+    }
+
+    isInboundEmpty() {
+        if (this.protocol == Protocols.VMESS && this.settings.vmesses.length == 0) {
+            return true;
+        } else if (this.protocol == Protocols.VLESS && this.settings.vlesses.length == 0) {
+            return true;
+        } else if (this.protocol == Protocols.TROJAN && this.settings.trojans.length == 0) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    // VMess & VLess
+    get uuid() {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+                return this.settings.vmesses[0].id;
+            case Protocols.VLESS:
+                return this.settings.vlesses[0].id;
+            default:
+                return "";
+        }
+    }
+
+    // VLess & Trojan
+    get flow() {
+        switch (this.protocol) {
+            case Protocols.VLESS:
+                return this.settings.vlesses[0].flow;
+            case Protocols.TROJAN:
+                return this.settings.trojans[0].flow;
+            default:
+                return "";
+        }
+    }
+
+    // VMess
+    get alterId() {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+                return this.settings.vmesses[0].alterId;
+            default:
+                return "";
+        }
+    }
+
+    // Socks & HTTP
+    get username() {
+        switch (this.protocol) {
+            case Protocols.SOCKS:
+            case Protocols.HTTP:
+                return this.settings.accounts[0].user;
+            default:
+                return "";
+        }
+    }
+
+    // Trojan & Shadowsocks & Socks & HTTP
+    get password() {
+        switch (this.protocol) {
+            case Protocols.TROJAN:
+                return this.settings.trojans[0].password;
+            case Protocols.SHADOWSOCKS:
+                return this.settings.password;
+            case Protocols.SOCKS:
+            case Protocols.HTTP:
+                return this.settings.accounts[0].pass;
+            default:
+                return "";
+        }
+    }
+
+    // Shadowsocks
+    get method() {
+        switch (this.protocol) {
+            case Protocols.SHADOWSOCKS:
+                return this.settings.method;
+            default:
+                return "";
+        }
+    }
+
+    get serverName() {
+        if (this.stream.isTls || this.stream.isXTls) {
+            return this.stream.tls.server;
+        }
+        return "";
+    }
+
+    get host() {
+        if (this.isTcp) {
+            return this.stream.tcp.request.getHeader("Host");
+        } else if (this.isWs) {
+            return this.stream.ws.getHeader("Host");
+        } else if (this.isH2) {
+            return this.stream.http.host[0];
+        }
+        return null;
+    }
+
+    get path() {
+        if (this.isTcp) {
+            return this.stream.tcp.request.path[0];
+        } else if (this.isWs) {
+            return this.stream.ws.path;
+        } else if (this.isH2) {
+            return this.stream.http.path[0];
+        }
+        return null;
+    }
+
+    get quicSecurity() {
+        return this.stream.quic.security;
+    }
+
+    get quicKey() {
+        return this.stream.quic.key;
+    }
+
+    get quicType() {
+        return this.stream.quic.type;
+    }
+
+    get kcpType() {
+        return this.stream.kcp.type;
+    }
+
+    get kcpSeed() {
+        return this.stream.kcp.seed;
+    }
+
+    get serviceName() {
+        return this.stream.grpc.serviceName;
+    }
+
+    isExpiry(index) {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+                if(this.settings.vmesses[index]._expiryTime != null)
+                    return this.settings.vmesses[index]._expiryTime < new Date().getTime();
+                return false
+            case Protocols.VLESS:
+                if(this.settings.vlesses[index]._expiryTime != null)
+                    return this.settings.vlesses[index]._expiryTime < new Date().getTime();
+                return false
+                case Protocols.TROJAN:
+                    if(this.settings.trojans[index]._expiryTime != null)
+                        return this.settings.trojans[index]._expiryTime < new Date().getTime();
+                    return false
+            default:
+                return false;
+        }
+    }
+
+    canEnableTls() {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+            case Protocols.VLESS:
+            case Protocols.TROJAN:
+            case Protocols.SHADOWSOCKS:
+                break;
+            default:
+                return false;
+        }
+
+        switch (this.network) {
+            case "tcp":
+            case "ws":
+            case "http":
+            case "quic":
+            case "grpc":
+                return true;
+            default:
+                return false;
+        }
+    }
+	
+    //this is used for xtls-rprx-vison
+    canEnableTlsFlow() {
+        if ((this.stream.security === 'tls') && (this.network === "tcp")) {
+            switch (this.protocol) {
+                case Protocols.VLESS:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        return false;
+    }
+	
+    canSetTls() {
+        return this.canEnableTls();
+    }
+
+    canEnableXTls() {
+        switch (this.protocol) {
+            case Protocols.VLESS:
+            case Protocols.TROJAN:
+                break;
+            default:
+                return false;
+        }
+        return this.network === "tcp";
+    }
+
+    canEnableStream() {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+            case Protocols.VLESS:
+			case Protocols.TROJAN:
+            case Protocols.SHADOWSOCKS:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    canSniffing() {
+        switch (this.protocol) {
+            case Protocols.VMESS:
+            case Protocols.VLESS:
+            case Protocols.TROJAN:
+            case Protocols.SHADOWSOCKS:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    reset() {
+        this.port = RandomUtil.randomIntRange(10000, 60000);
+        this.listen = '';
+        this.protocol = Protocols.VMESS;
+        this.settings = Inbound.Settings.getSettings(Protocols.VMESS);
+        this.stream = new StreamSettings();
+        this.tag = '';
+        this.sniffing = new Sniffing();
+    }
+
+    genVmessLink(address='', remark='', clientIndex=0) {
+        if (this.protocol !== Protocols.VMESS) {
+            return '';
+        }
+        let network = this.stream.network;
+        let type = 'none';
+        let host = '';
+        let path = '';
+        if (network === 'tcp') {
+            let tcp = this.stream.tcp;
+            type = tcp.type;
+            if (type === 'http') {
+                let request = tcp.request;
+                path = request.path.join(',');
+                let index = request.headers.findIndex(header => header.name.toLowerCase() === 'host');
+                if (index >= 0) {
+                    host = request.headers[index].value;
+                }
+            }
+        } else if (network === 'kcp') {
+            let kcp = this.stream.kcp;
+            type = kcp.type;
+            path = kcp.seed;
+        } else if (network === 'ws') {
+            let ws = this.stream.ws;
+            path = ws.path;
+            let index = ws.headers.findIndex(header => header.name.toLowerCase() === 'host');
+            if (index >= 0) {
+                host = ws.headers[index].value;
+            }
+        } else if (network === 'http') {
+            network = 'h2';
+            path = this.stream.http.path;
+            host = this.stream.http.host.join(',');
+        } else if (network === 'quic') {
+            type = this.stream.quic.type;
+            host = this.stream.quic.security;
+            path = this.stream.quic.key;
+        } else if (network === 'grpc') {
+            path = this.stream.grpc.serviceName;
+        }
+
+        if (this.stream.security === 'tls') {
+            if (!ObjectUtil.isEmpty(this.stream.tls.server)) {
+                address = this.stream.tls.server;
+            }
+        }
+
+        let obj = {
+            v: '2',
+            ps: remark,
+            add: address,
+            port: this.port,
+            id: this.settings.vmesses[clientIndex].id,
+            aid: this.settings.vmesses[clientIndex].alterId,
+            net: network,
+            type: type,
+            host: host,
+            path: path,
+            tls: this.stream.security,
+        };
+        return 'vmess://' + base64(JSON.stringify(obj, null, 2));
+    }
+
+    genVLESSLink(address = '', remark='', clientIndex=0) {
+        const settings = this.settings;
+        const uuid = settings.vlesses[clientIndex].id;
+        const port = this.port;
+        const type = this.stream.network;
+        const params = new Map();
+        params.set("type", this.stream.network);
+        if (this.xtls) {
+            params.set("security", "xtls");
+            address = this.stream.tls.server;
+        } else {
+            params.set("security", this.stream.security);
+        }
+        switch (type) {
+            case "tcp":
+                const tcp = this.stream.tcp;
+                if (tcp.type === 'http') {
+                    const request = tcp.request;
+                    params.set("path", request.path.join(','));
+                    const index = request.headers.findIndex(header => header.name.toLowerCase() === 'host');
+                    if (index >= 0) {
+                        const host = request.headers[index].value;
+                        params.set("host", host);
+                    }
+                    params.set("headerType", 'http');
+                }
+                break;
+            case "kcp":
+                const kcp = this.stream.kcp;
+                params.set("headerType", kcp.type);
+                params.set("seed", kcp.seed);
+                break;
+            case "ws":
+                const ws = this.stream.ws;
+                params.set("path", ws.path);
+                const index = ws.headers.findIndex(header => header.name.toLowerCase() === 'host');
+                if (index >= 0) {
+                    const host = ws.headers[index].value;
+                    params.set("host", host);
+                }
+                break;
+            case "http":
+                const http = this.stream.http;
+                params.set("path", http.path);
+                params.set("host", http.host);
+                break;
+            case "quic":
+                const quic = this.stream.quic;
+                params.set("quicSecurity", quic.security);
+                params.set("key", quic.key);
+                params.set("headerType", quic.type);
+                break;
+            case "grpc":
+                const grpc = this.stream.grpc;
+                params.set("serviceName", grpc.serviceName);
+                break;
+        }
+
+        if (this.stream.security === 'tls') {
+            if (!ObjectUtil.isEmpty(this.stream.tls.server)) {
+                address = this.stream.tls.server;
+                params.set("sni", address);
+            }
+			params.set("flow", this.settings.vlesses[clientIndex].flow);
+        }
+
+        if (this.xtls) {
+            params.set("flow", this.settings.vlesses[clientIndex].flow);
+        }
+
+        const link = `vless://${uuid}@${address}:${port}`;
+        const url = new URL(link);
+        for (const [key, value] of params) {
+            url.searchParams.set(key, value)
+        }
+        url.hash = encodeURIComponent(remark);
+        return url.toString();
+    }
+
+    genSSLink(address = '', remark = '') {
+        let settings = this.settings;
+        const server = this.stream.tls.server;
+        if (!ObjectUtil.isEmpty(server)) {
+            address = server;
+        }
+        if (settings.method == SSMethods.BLAKE3_AES_128_GCM || settings.method == SSMethods.BLAKE3_AES_256_GCM || settings.method == SSMethods.BLAKE3_CHACHA20_POLY1305) {
+            return `ss://${settings.method}:${settings.password}@${address}:${this.port}#${encodeURIComponent(remark)}`;
+        } else {
+            return 'ss://' + safeBase64(settings.method + ':' + settings.password + '@' + address + ':' + this.port)
+                + '#' + encodeURIComponent(remark);
+        }
+    }
+
+    genTrojanLink(address = '', remark = '', clientIndex = 0) {
+        let settings = this.settings;
+        const port = this.port;
+        const type = this.stream.network;
+        const params = new Map();
+        params.set("type", this.stream.network);
+        if (this.xtls) {
+            params.set("security", "xtls");
+        } else {
+            params.set("security", this.stream.security);
+        }
+        switch (type) {
+            case "tcp":
+                const tcp = this.stream.tcp;
+                if (tcp.type === 'http') {
+                    const request = tcp.request;
+                    params.set("path", request.path.join(','));
+                    const index = request.headers.findIndex(header => header.name.toLowerCase() === 'host');
+                    if (index >= 0) {
+                        const host = request.headers[index].value;
+                        params.set("host", host);
+                    }
+                    params.set("headerType", 'http');
+                }
+                break;
+            case "kcp":
+                const kcp = this.stream.kcp;
+                params.set("headerType", kcp.type);
+                params.set("seed", kcp.seed);
+                break;
+            case "ws":
+                const ws = this.stream.ws;
+                params.set("path", ws.path);
+                const index = ws.headers.findIndex(header => header.name.toLowerCase() === 'host');
+                if (index >= 0) {
+                    const host = ws.headers[index].value;
+                    params.set("host", host);
+                }
+                break;
+            case "http":
+                const http = this.stream.http;
+                params.set("path", http.path);
+                params.set("host", http.host);
+                break;
+            case "quic":
+                const quic = this.stream.quic;
+                params.set("quicSecurity", quic.security);
+                params.set("key", quic.key);
+                params.set("headerType", quic.type);
+                break;
+            case "grpc":
+                const grpc = this.stream.grpc;
+                params.set("serviceName", grpc.serviceName);
+                break;
+        }
+
+        if (this.stream.security === 'tls') {
+            if (!ObjectUtil.isEmpty(this.stream.tls.server)) {
+                address = this.stream.tls.server;
+                params.set("sni", address);
+            }
+            params.set("flow", this.settings.trojans[clientIndex].flow);
+        }
+        if (this.xtls) {
+            params.set("flow", this.settings.trojans[clientIndex].flow);
+        }
+        const link = `trojan://${settings.trojans[clientIndex].password}@${address}:${this.port}#${encodeURIComponent(remark+"-"+settings.trojans[clientIndex].email)}`;
+        const url = new URL(link);
+        for (const [key, value] of params) {
+            url.searchParams.set(key, value)
+        }
+        url.hash = encodeURIComponent(remark);
+        return url.toString();
+    }
+
+    genLink(address='', remark='', clientIndex=0) {
+        switch (this.protocol) {
+            case Protocols.VMESS: return this.genVmessLink(address, remark, clientIndex);
+            case Protocols.VLESS: return this.genVLESSLink(address, remark, clientIndex);
+            case Protocols.SHADOWSOCKS: return this.genSSLink(address, remark);
+            case Protocols.TROJAN: return this.genTrojanLink(address, remark, clientIndex);
+            default: return '';
+        }
+    }
+
+    static fromJson(json={}) {
+        return new Inbound(
+            json.port,
+            json.listen,
+            json.protocol,
+            Inbound.Settings.fromJson(json.protocol, json.settings),
+            StreamSettings.fromJson(json.streamSettings),
+            json.tag,
+            Sniffing.fromJson(json.sniffing),
+            json.clientStats
+        )
+    }
+
+    toJson() {
+        let streamSettings;
+        if (this.canEnableStream() || this.protocol === Protocols.TROJAN) {
+            streamSettings = this.stream.toJson();
+        }
+        return {
+            port: this.port,
+            listen: this.listen,
+            protocol: this.protocol,
+            settings: this.settings instanceof XrayCommonClass ? this.settings.toJson() : this.settings,
+            streamSettings: streamSettings,
+            tag: this.tag,
+            sniffing: this.sniffing.toJson(),
+            clientStats: this.clientStats
+        };
+    }
+}
+
+Inbound.Settings = class extends XrayCommonClass {
+    constructor(protocol) {
+        super();
+        this.protocol = protocol;
+    }
+
+    static getSettings(protocol) {
+        switch (protocol) {
+            case Protocols.VMESS: return new Inbound.VmessSettings(protocol);
+            case Protocols.VLESS: return new Inbound.VLESSSettings(protocol);
+            case Protocols.TROJAN: return new Inbound.TrojanSettings(protocol);
+            case Protocols.SHADOWSOCKS: return new Inbound.ShadowsocksSettings(protocol);
+            case Protocols.DOKODEMO: return new Inbound.DokodemoSettings(protocol);
+            case Protocols.MTPROTO: return new Inbound.MtprotoSettings(protocol);
+            case Protocols.SOCKS: return new Inbound.SocksSettings(protocol);
+            case Protocols.HTTP: return new Inbound.HttpSettings(protocol);
+            default: return null;
+        }
+    }
+
+    static fromJson(protocol, json) {
+        switch (protocol) {
+            case Protocols.VMESS: return Inbound.VmessSettings.fromJson(json);
+            case Protocols.VLESS: return Inbound.VLESSSettings.fromJson(json);
+            case Protocols.TROJAN: return Inbound.TrojanSettings.fromJson(json);
+            case Protocols.SHADOWSOCKS: return Inbound.ShadowsocksSettings.fromJson(json);
+            case Protocols.DOKODEMO: return Inbound.DokodemoSettings.fromJson(json);
+            case Protocols.MTPROTO: return Inbound.MtprotoSettings.fromJson(json);
+            case Protocols.SOCKS: return Inbound.SocksSettings.fromJson(json);
+            case Protocols.HTTP: return Inbound.HttpSettings.fromJson(json);
+            default: return null;
+        }
+    }
+
+    toJson() {
+        return {};
+    }
+};
+
+Inbound.VmessSettings = class extends Inbound.Settings {
+    constructor(protocol,
+                vmesses=[new Inbound.VmessSettings.Vmess()],
+                disableInsecureEncryption=false) {
+        super(protocol);
+        this.vmesses = vmesses;
+        this.disableInsecure = disableInsecureEncryption;
+    }
+
+    indexOfVmessById(id) {
+        return this.vmesses.findIndex(vmess => vmess.id === id);
+    }
+
+    addVmess(vmess) {
+        if (this.indexOfVmessById(vmess.id) >= 0) {
+            return false;
+        }
+        this.vmesses.push(vmess);
+    }
+
+    delVmess(vmess) {
+        const i = this.indexOfVmessById(vmess.id);
+        if (i >= 0) {
+            this.vmesses.splice(i, 1);
+        }
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.VmessSettings(
+            Protocols.VMESS,
+            json.clients.map(client => Inbound.VmessSettings.Vmess.fromJson(client)),
+            ObjectUtil.isEmpty(json.disableInsecureEncryption) ? false : json.disableInsecureEncryption,
+        );
+    }
+
+    toJson() {
+        return {
+            clients: Inbound.VmessSettings.toJsonArray(this.vmesses),
+            disableInsecureEncryption: this.disableInsecure,
+        };
+    }
+};
+Inbound.VmessSettings.Vmess = class extends XrayCommonClass {
+    constructor(id=RandomUtil.randomUUID(), alterId=0, email='', totalGB=0, expiryTime='') {
+        super();
+        this.id = id;
+        this.alterId = alterId;
+        this.email = email;
+        this.totalGB = totalGB;
+        this.expiryTime = expiryTime;
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.VmessSettings.Vmess(
+            json.id,
+            json.alterId,
+            json.email,
+            json.totalGB,
+            json.expiryTime,
+
+        );
+    }
+    get _expiryTime() {
+        if (this.expiryTime === 0 || this.expiryTime === "") {
+            return null;
+        }
+        return moment(this.expiryTime);
+    }
+
+    set _expiryTime(t) {
+        if (t == null || t === "") {
+            this.expiryTime = 0;
+        } else {
+            this.expiryTime = t.valueOf();
+        }
+    }
+    get _totalGB() {
+        return toFixed(this.totalGB / ONE_GB, 2);
+    }
+
+    set _totalGB(gb) {
+        this.totalGB = toFixed(gb * ONE_GB, 0);
+    }
+
+};
+
+Inbound.VLESSSettings = class extends Inbound.Settings {
+    constructor(protocol,
+                vlesses=[new Inbound.VLESSSettings.VLESS()],
+                decryption='none',
+                fallbacks=[],) {
+        super(protocol);
+        this.vlesses = vlesses;
+        this.decryption = decryption;
+        this.fallbacks = fallbacks;
+    }
+
+    addFallback() {
+        this.fallbacks.push(new Inbound.VLESSSettings.Fallback());
+    }
+
+    delFallback(index) {
+        this.fallbacks.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.VLESSSettings(
+            Protocols.VLESS,
+            json.clients.map(client => Inbound.VLESSSettings.VLESS.fromJson(client)),
+            json.decryption,
+            Inbound.VLESSSettings.Fallback.fromJson(json.fallbacks),
+        );
+    }
+
+    toJson() {
+        return {
+            clients: Inbound.VLESSSettings.toJsonArray(this.vlesses),
+            decryption: this.decryption,
+            fallbacks: Inbound.VLESSSettings.toJsonArray(this.fallbacks),
+        };
+    }
+
+};
+Inbound.VLESSSettings.VLESS = class extends XrayCommonClass {
+
+    constructor(id=RandomUtil.randomUUID(), flow='', email='', totalGB=0, fingerprint = UTLS_FINGERPRINT.UTLS_CHROME, expiryTime='') {
+        super();
+        this.id = id;
+        this.flow = flow;
+        this.email = email;
+        this.totalGB = totalGB;
+        this.fingerprint = fingerprint;
+        this.expiryTime = expiryTime;
+
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.VLESSSettings.VLESS(
+            json.id,
+            json.flow,
+            json.email,
+            json.totalGB,
+            json.fingerprint,
+            json.expiryTime,
+
+        );
+    }
+
+    get _expiryTime() {
+        if (this.expiryTime === 0 || this.expiryTime === "") {
+            return null;
+        }
+        return moment(this.expiryTime);
+    }
+
+    set _expiryTime(t) {
+        if (t == null || t === "") {
+            this.expiryTime = 0;
+        } else {
+            this.expiryTime = t.valueOf();
+        }
+    }
+    get _totalGB() {
+        return toFixed(this.totalGB / ONE_GB, 2);
+    }
+
+    set _totalGB(gb) {
+        this.totalGB = toFixed(gb * ONE_GB, 0);
+    }
+};
+Inbound.VLESSSettings.Fallback = class extends XrayCommonClass {
+    constructor(name="", alpn='', path='', dest='', xver=0) {
+        super();
+        this.name = name;
+        this.alpn = alpn;
+        this.path = path;
+        this.dest = dest;
+        this.xver = xver;
+    }
+
+    toJson() {
+        let xver = this.xver;
+        if (!Number.isInteger(xver)) {
+            xver = 0;
+        }
+        return {
+            name: this.name,
+            alpn: this.alpn,
+            path: this.path,
+            dest: this.dest,
+            xver: xver,
+        }
+    }
+
+    static fromJson(json=[]) {
+        const fallbacks = [];
+        for (let fallback of json) {
+            fallbacks.push(new Inbound.VLESSSettings.Fallback(
+                fallback.name,
+                fallback.alpn,
+                fallback.path,
+                fallback.dest,
+                fallback.xver,
+            ))
+        }
+        return fallbacks;
+    }
+};
+
+Inbound.TrojanSettings = class extends Inbound.Settings {
+    constructor(protocol,
+		trojans=[new Inbound.TrojanSettings.Trojan()],
+		fallbacks=[],) {
+        super(protocol);
+        this.trojans = trojans;
+        this.fallbacks = fallbacks;
+    }
+
+    addTrojanFallback() {
+        this.fallbacks.push(new Inbound.TrojanSettings.Fallback());
+    }
+
+    delTrojanFallback(index) {
+        this.fallbacks.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.TrojanSettings(
+            Protocols.TROJAN,
+            json.clients.map(client => Inbound.TrojanSettings.Trojan.fromJson(client)),
+            Inbound.TrojanSettings.Fallback.fromJson(json.fallbacks),);
+    }
+
+    toJson() {
+        return {
+            clients: Inbound.TrojanSettings.toJsonArray(this.trojans),
+            fallbacks: Inbound.TrojanSettings.toJsonArray(this.fallbacks),
+        };
+    }
+};
+Inbound.TrojanSettings.Trojan = class extends XrayCommonClass {
+    constructor(password=RandomUtil.randomSeq(10), flow = XTLS_FLOW_CONTROL.DIRECT, email='', totalGB=0, expiryTime='') {
+        super();
+        this.password = password;
+        this.flow = flow;
+        this.email = email;
+        this.totalGB = totalGB;
+        this.expiryTime = expiryTime;
+    }
+
+    toJson() {
+        return {
+            password: this.password,
+            flow: this.flow,
+            email: this.email,
+            totalGB: this.totalGB,
+            expiryTime: this.expiryTime,
+        };
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.TrojanSettings.Trojan(
+            json.password,
+            json.flow,
+            json.email,
+            json.totalGB,
+            json.expiryTime,
+
+        );
+    }
+
+    get _expiryTime() {
+        if (this.expiryTime === 0 || this.expiryTime === "") {
+            return null;
+        }
+        return moment(this.expiryTime);
+    }
+
+    set _expiryTime(t) {
+        if (t == null || t === "") {
+            this.expiryTime = 0;
+        } else {
+            this.expiryTime = t.valueOf();
+        }
+    }
+    get _totalGB() {
+        return toFixed(this.totalGB / ONE_GB, 2);
+    }
+
+    set _totalGB(gb) {
+        this.totalGB = toFixed(gb * ONE_GB, 0);
+    }
+
+};
+
+Inbound.TrojanSettings.Fallback = class extends XrayCommonClass {
+    constructor(name="", alpn='', path='', dest='', xver=0) {
+        super();
+        this.name = name;
+        this.alpn = alpn;
+        this.path = path;
+        this.dest = dest;
+        this.xver = xver;
+    }
+
+    toJson() {
+        let xver = this.xver;
+        if (!Number.isInteger(xver)) {
+            xver = 0;
+        }
+        return {
+            name: this.name,
+            alpn: this.alpn,
+            path: this.path,
+            dest: this.dest,
+            xver: xver,
+        }
+    }
+
+    static fromJson(json=[]) {
+        const fallbacks = [];
+        for (let fallback of json) {
+            fallbacks.push(new Inbound.TrojanSettings.Fallback(
+                fallback.name,
+                fallback.alpn,
+                fallback.path,
+                fallback.dest,
+                fallback.xver,
+            ))
+        }
+        return fallbacks;
+    }
+};
+
+Inbound.ShadowsocksSettings = class extends Inbound.Settings {
+    constructor(protocol,
+        method = SSMethods.BLAKE3_AES_256_GCM,
+        password = RandomUtil.randomSeq(44),
+        network = 'tcp,udp'
+    ) {
+        super(protocol);
+        this.method = method;
+        this.password = password;
+        this.network = network;
+    }
+
+    static fromJson(json = {}) {
+        return new Inbound.ShadowsocksSettings(
+            Protocols.SHADOWSOCKS,
+            json.method,
+            json.password,
+            json.network,
+        );
+    }
+
+    toJson() {
+        return {
+            method: this.method,
+            password: this.password,
+            network: this.network,
+        };
+    }
+};
+
+Inbound.DokodemoSettings = class extends Inbound.Settings {
+    constructor(protocol, address, port, network='tcp,udp') {
+        super(protocol);
+        this.address = address;
+        this.port = port;
+        this.network = network;
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.DokodemoSettings(
+            Protocols.DOKODEMO,
+            json.address,
+            json.port,
+            json.network,
+        );
+    }
+
+    toJson() {
+        return {
+            address: this.address,
+            port: this.port,
+            network: this.network,
+        };
+    }
+};
+
+Inbound.MtprotoSettings = class extends Inbound.Settings {
+    constructor(protocol, users=[new Inbound.MtprotoSettings.MtUser()]) {
+        super(protocol);
+        this.users = users;
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.MtprotoSettings(
+            Protocols.MTPROTO,
+            json.users.map(user => Inbound.MtprotoSettings.MtUser.fromJson(user)),
+        );
+    }
+
+    toJson() {
+        return {
+            users: XrayCommonClass.toJsonArray(this.users),
+        };
+    }
+};
+Inbound.MtprotoSettings.MtUser = class extends XrayCommonClass {
+    constructor(secret=RandomUtil.randomMTSecret()) {
+        super();
+        this.secret = secret;
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.MtprotoSettings.MtUser(json.secret);
+    }
+};
+
+Inbound.SocksSettings = class extends Inbound.Settings {
+    constructor(protocol, auth='password', accounts=[new Inbound.SocksSettings.SocksAccount()], udp=false, ip='127.0.0.1') {
+        super(protocol);
+        this.auth = auth;
+        this.accounts = accounts;
+        this.udp = udp;
+        this.ip = ip;
+    }
+
+    addAccount(account) {
+        this.accounts.push(account);
+    }
+
+    delAccount(index) {
+        this.accounts.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        let accounts;
+        if (json.auth === 'password') {
+            accounts = json.accounts.map(
+                account => Inbound.SocksSettings.SocksAccount.fromJson(account)
+            )
+        }
+        return new Inbound.SocksSettings(
+            Protocols.SOCKS,
+            json.auth,
+            accounts,
+            json.udp,
+            json.ip,
+        );
+    }
+
+    toJson() {
+        return {
+            auth: this.auth,
+            accounts: this.auth === 'password' ? this.accounts.map(account => account.toJson()) : undefined,
+            udp: this.udp,
+            ip: this.ip,
+        };
+    }
+};
+Inbound.SocksSettings.SocksAccount = class extends XrayCommonClass {
+    constructor(user=RandomUtil.randomSeq(10), pass=RandomUtil.randomSeq(10)) {
+        super();
+        this.user = user;
+        this.pass = pass;
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.SocksSettings.SocksAccount(json.user, json.pass);
+    }
+};
+
+Inbound.HttpSettings = class extends Inbound.Settings {
+    constructor(protocol, accounts=[new Inbound.HttpSettings.HttpAccount()]) {
+        super(protocol);
+        this.accounts = accounts;
+    }
+
+    addAccount(account) {
+        this.accounts.push(account);
+    }
+
+    delAccount(index) {
+        this.accounts.splice(index, 1);
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.HttpSettings(
+            Protocols.HTTP,
+            json.accounts.map(account => Inbound.HttpSettings.HttpAccount.fromJson(account)),
+        );
+    }
+
+    toJson() {
+        return {
+            accounts: Inbound.HttpSettings.toJsonArray(this.accounts),
+        };
+    }
+};
+
+Inbound.HttpSettings.HttpAccount = class extends XrayCommonClass {
+    constructor(user=RandomUtil.randomSeq(10), pass=RandomUtil.randomSeq(10)) {
+        super();
+        this.user = user;
+        this.pass = pass;
+    }
+
+    static fromJson(json={}) {
+        return new Inbound.HttpSettings.HttpAccount(json.user, json.pass);
+    }
+};

web/assets/js/util/common.js

@@ -0,0 +1,57 @@
+const ONE_KB = 1024;
+const ONE_MB = ONE_KB * 1024;
+const ONE_GB = ONE_MB * 1024;
+const ONE_TB = ONE_GB * 1024;
+const ONE_PB = ONE_TB * 1024;
+
+function sizeFormat(size) {
+    if (size < ONE_KB) {
+        return size.toFixed(0) + " B";
+    } else if (size < ONE_MB) {
+        return (size / ONE_KB).toFixed(2) + " KB";
+    } else if (size < ONE_GB) {
+        return (size / ONE_MB).toFixed(2) + " MB";
+    } else if (size < ONE_TB) {
+        return (size / ONE_GB).toFixed(2) + " GB";
+    } else if (size < ONE_PB) {
+        return (size / ONE_TB).toFixed(2) + " TB";
+    } else {
+        return (size / ONE_PB).toFixed(2) + " PB";
+    }
+}
+
+function base64(str) {
+    return Base64.encode(str);
+}
+
+function safeBase64(str) {
+    return base64(str)
+        .replace(/\+/g, '-')
+        .replace(/=/g, '')
+        .replace(/\//g, '_');
+}
+
+function formatSecond(second) {
+    if (second < 60) {
+        return second.toFixed(0) + ' s';
+    } else if (second < 3600) {
+        return (second / 60).toFixed(0) + ' m';
+    } else if (second < 3600 * 24) {
+        return (second / 3600).toFixed(0) + ' h';
+    } else {
+        return (second / 3600 / 24).toFixed(0) + ' d';
+    }
+}
+
+function addZero(num) {
+    if (num < 10) {
+        return "0" + num;
+    } else {
+        return num;
+    }
+}
+
+function toFixed(num, n) {
+    n = Math.pow(10, n);
+    return Math.round(num * n) / n;
+}

web/assets/js/util/date-util.js

@@ -0,0 +1,147 @@
+const oneMinute = 1000 * 60; // 一分钟的毫秒数
+const oneHour = oneMinute * 60; // 一小时的毫秒数
+const oneDay = oneHour * 24; // 一天的毫秒数
+const oneWeek = oneDay * 7; // 一星期的毫秒数
+const oneMonth = oneDay * 30; // 一个月的毫秒数
+
+/**
+ * 按天数减少
+ *
+ * @param days 要减少的天数
+ */
+Date.prototype.minusDays = function (days) {
+    return this.minusMillis(oneDay * days);
+};
+
+/**
+ * 按天数增加
+ *
+ * @param days 要增加的天数
+ */
+Date.prototype.plusDays = function (days) {
+    return this.plusMillis(oneDay * days);
+};
+
+/**
+ * 按小时减少
+ *
+ * @param hours 要减少的小时数
+ */
+Date.prototype.minusHours = function (hours) {
+    return this.minusMillis(oneHour * hours);
+};
+
+/**
+ * 按小时增加
+ *
+ * @param hours 要增加的小时数
+ */
+Date.prototype.plusHours = function (hours) {
+    return this.plusMillis(oneHour * hours);
+};
+
+/**
+ * 按分钟减少
+ *
+ * @param minutes 要减少的分钟数
+ */
+Date.prototype.minusMinutes = function (minutes) {
+    return this.minusMillis(oneMinute * minutes);
+};
+
+/**
+ * 按分钟增加
+ *
+ * @param minutes 要增加的分钟数
+ */
+Date.prototype.plusMinutes = function (minutes) {
+    return this.plusMillis(oneMinute * minutes);
+};
+
+/**
+ * 按毫秒减少
+ *
+ * @param millis 要减少的毫秒数
+ */
+Date.prototype.minusMillis = function(millis) {
+    let time = this.getTime() - millis;
+    let newDate = new Date();
+    newDate.setTime(time);
+    return newDate;
+};
+
+/**
+ * 按毫秒增加
+ *
+ * @param millis 要增加的毫秒数
+ */
+Date.prototype.plusMillis = function(millis) {
+    let time = this.getTime() + millis;
+    let newDate = new Date();
+    newDate.setTime(time);
+    return newDate;
+};
+
+/**
+ * 设置时间为当天的 00:00:00.000
+ */
+Date.prototype.setMinTime = function () {
+    this.setHours(0);
+    this.setMinutes(0);
+    this.setSeconds(0);
+    this.setMilliseconds(0);
+    return this;
+};
+
+/**
+ * 设置时间为当天的 23:59:59.999
+ */
+Date.prototype.setMaxTime = function () {
+    this.setHours(23);
+    this.setMinutes(59);
+    this.setSeconds(59);
+    this.setMilliseconds(999);
+    return this;
+};
+
+/**
+ * 格式化日期
+ */
+Date.prototype.formatDate = function () {
+    return this.getFullYear() + "-" + addZero(this.getMonth() + 1) + "-" + addZero(this.getDate());
+};
+
+/**
+ * 格式化时间
+ */
+Date.prototype.formatTime = function () {
+    return addZero(this.getHours()) + ":" + addZero(this.getMinutes()) + ":" + addZero(this.getSeconds());
+};
+
+/**
+ * 格式化日期加时间
+ *
+ * @param split 日期和时间之间的分隔符，默认是一个空格
+ */
+Date.prototype.formatDateTime = function (split = ' ') {
+    return this.formatDate() + split + this.formatTime();
+};
+
+class DateUtil {
+
+    // 字符串转 Date 对象
+    static parseDate(str) {
+        return new Date(str.replace(/-/g, '/'));
+    }
+
+    static formatMillis(millis) {
+        return moment(millis).format('YYYY-M-D H:m:s')
+    }
+
+    static firstDayOfMonth() {
+        const date = new Date();
+        date.setDate(1);
+        date.setMinTime();
+        return date;
+    }
+}

web/assets/js/util/utils.js

@@ -0,0 +1,291 @@
+class HttpUtil {
+    static _handleMsg(msg) {
+        if (!(msg instanceof Msg)) {
+            return;
+        }
+        if (msg.msg === "") {
+            return;
+        }
+        if (msg.success) {
+            Vue.prototype.$message.success(msg.msg);
+        } else {
+            Vue.prototype.$message.error(msg.msg);
+        }
+    }
+
+    static _respToMsg(resp) {
+        const data = resp.data;
+        if (data == null) {
+            return new Msg(true);
+        } else if (typeof data === 'object') {
+            if (data.hasOwnProperty('success')) {
+                return new Msg(data.success, data.msg, data.obj);
+            } else {
+                return data;
+            }
+        } else {
+            return new Msg(false, 'unknown data:', data);
+        }
+    }
+
+    static async get(url, data, options) {
+        let msg;
+        try {
+            const resp = await axios.get(url, data, options);
+            msg = this._respToMsg(resp);
+        } catch (e) {
+            msg = new Msg(false, e.toString());
+        }
+        this._handleMsg(msg);
+        return msg;
+    }
+
+    static async post(url, data, options) {
+        let msg;
+        try {
+            const resp = await axios.post(url, data, options);
+            msg = this._respToMsg(resp);
+        } catch (e) {
+            msg = new Msg(false, e.toString());
+        }
+        this._handleMsg(msg);
+        return msg;
+    }
+
+    static async postWithModal(url, data, modal) {
+        if (modal) {
+            modal.loading(true);
+        }
+        const msg = await this.post(url, data);
+        if (modal) {
+            modal.loading(false);
+            if (msg instanceof Msg && msg.success) {
+                modal.close();
+            }
+        }
+        return msg;
+    }
+}
+
+class PromiseUtil {
+
+    static async sleep(timeout) {
+        await new Promise(resolve => {
+            setTimeout(resolve, timeout)
+        });
+    }
+
+}
+
+const seq = [
+    'a', 'b', 'c', 'd', 'e', 'f', 'g',
+    'h', 'i', 'j', 'k', 'l', 'm', 'n',
+    'o', 'p', 'q', 'r', 's', 't',
+    'u', 'v', 'w', 'x', 'y', 'z',
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+    'A', 'B', 'C', 'D', 'E', 'F', 'G',
+    'H', 'I', 'J', 'K', 'L', 'M', 'N',
+    'O', 'P', 'Q', 'R', 'S', 'T',
+    'U', 'V', 'W', 'X', 'Y', 'Z'
+];
+
+class RandomUtil {
+
+    static randomIntRange(min, max) {
+        return parseInt(Math.random() * (max - min) + min, 10);
+    }
+
+    static randomInt(n) {
+        return this.randomIntRange(0, n);
+    }
+
+    static randomSeq(count) {
+        let str = '';
+        for (let i = 0; i < count; ++i) {
+            str += seq[this.randomInt(62)];
+        }
+        return str;
+    }
+
+    static randomLowerAndNum(count) {
+        let str = '';
+        for (let i = 0; i < count; ++i) {
+            str += seq[this.randomInt(36)];
+        }
+        return str;
+    }
+
+    static randomMTSecret() {
+        let str = '';
+        for (let i = 0; i < 32; ++i) {
+            let index = this.randomInt(16);
+            if (index <= 9) {
+                str += index;
+            } else {
+                str += seq[index - 10];
+            }
+        }
+        return str;
+    }
+
+    static randomUUID() {
+        let d = new Date().getTime();
+        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
+            let r = (d + Math.random() * 16) % 16 | 0;
+            d = Math.floor(d / 16);
+            return (c === 'x' ? r : (r & 0x7 | 0x8)).toString(16);
+        });
+    }
+}
+
+class ObjectUtil {
+
+    static getPropIgnoreCase(obj, prop) {
+        for (const name in obj) {
+            if (!obj.hasOwnProperty(name)) {
+                continue;
+            }
+            if (name.toLowerCase() === prop.toLowerCase()) {
+                return obj[name];
+            }
+        }
+        return undefined;
+    }
+
+    static deepSearch(obj, key) {
+        if (obj instanceof Array) {
+            for (let i = 0; i < obj.length; ++i) {
+                if (this.deepSearch(obj[i], key)) {
+                    return true;
+                }
+            }
+        } else if (obj instanceof Object) {
+            for (let name in obj) {
+                if (!obj.hasOwnProperty(name)) {
+                    continue;
+                }
+                if (this.deepSearch(obj[name], key)) {
+                    return true;
+                }
+            }
+        } else {
+            return obj.toString().indexOf(key) >= 0;
+        }
+        return false;
+    }
+
+    static isEmpty(obj) {
+        return obj === null || obj === undefined || obj === '';
+    }
+
+    static isArrEmpty(arr) {
+        return !this.isEmpty(arr) && arr.length === 0;
+    }
+
+    static copyArr(dest, src) {
+        dest.splice(0);
+        for (const item of src) {
+            dest.push(item);
+        }
+    }
+
+    static clone(obj) {
+        let newObj;
+        if (obj instanceof Array) {
+            newObj = [];
+            this.copyArr(newObj, obj);
+        } else if (obj instanceof Object) {
+            newObj = {};
+            for (const key of Object.keys(obj)) {
+                newObj[key] = obj[key];
+            }
+        } else {
+            newObj = obj;
+        }
+        return newObj;
+    }
+
+    static deepClone(obj) {
+        let newObj;
+        if (obj instanceof Array) {
+            newObj = [];
+            for (const item of obj) {
+                newObj.push(this.deepClone(item));
+            }
+        } else if (obj instanceof Object) {
+            newObj = {};
+            for (const key of Object.keys(obj)) {
+                newObj[key] = this.deepClone(obj[key]);
+            }
+        } else {
+            newObj = obj;
+        }
+        return newObj;
+    }
+
+    static cloneProps(dest, src, ...ignoreProps) {
+        if (dest == null || src == null) {
+            return;
+        }
+        const ignoreEmpty = this.isArrEmpty(ignoreProps);
+        for (const key of Object.keys(src)) {
+            if (!src.hasOwnProperty(key)) {
+                continue;
+            } else if (!dest.hasOwnProperty(key)) {
+                continue;
+            } else if (src[key] === undefined) {
+                continue;
+            }
+            if (ignoreEmpty) {
+                dest[key] = src[key];
+            } else {
+                let ignore = false;
+                for (let i = 0; i < ignoreProps.length; ++i) {
+                    if (key === ignoreProps[i]) {
+                        ignore = true;
+                        break;
+                    }
+                }
+                if (!ignore) {
+                    dest[key] = src[key];
+                }
+            }
+        }
+    }
+
+    static delProps(obj, ...props) {
+        for (const prop of props) {
+            if (prop in obj) {
+                delete obj[prop];
+            }
+        }
+    }
+
+    static execute(func, ...args) {
+        if (!this.isEmpty(func) && typeof func === 'function') {
+            func(...args);
+        }
+    }
+
+    static orDefault(obj, defaultValue) {
+        if (obj == null) {
+            return defaultValue;
+        }
+        return obj;
+    }
+
+    static equals(a, b) {
+        for (const key in a) {
+            if (!a.hasOwnProperty(key)) {
+                continue;
+            }
+            if (!b.hasOwnProperty(key)) {
+                return false;
+            } else if (a[key] !== b[key]) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+}

web/assets/uri/URI.min.js

@@ -0,0 +1,93 @@
+/*! URI.js v1.19.5 http://medialize.github.io/URI.js/ */
+/* build contains: IPv6.js, punycode.js, SecondLevelDomains.js, URI.js, URITemplate.js */
+(function(r,x){"object"===typeof module&&module.exports?module.exports=x():"function"===typeof define&&define.amd?define(x):r.IPv6=x(r)})(this,function(r){var x=r&&r.IPv6;return{best:function(k){k=k.toLowerCase().split(":");var m=k.length,d=8;""===k[0]&&""===k[1]&&""===k[2]?(k.shift(),k.shift()):""===k[0]&&""===k[1]?k.shift():""===k[m-1]&&""===k[m-2]&&k.pop();m=k.length;-1!==k[m-1].indexOf(".")&&(d=7);var q;for(q=0;q<m&&""!==k[q];q++);if(q<d)for(k.splice(q,1,"0000");k.length<d;)k.splice(q,0,"0000");
+        for(q=0;q<d;q++){m=k[q].split("");for(var E=0;3>E;E++)if("0"===m[0]&&1<m.length)m.splice(0,1);else break;k[q]=m.join("")}m=-1;var A=E=0,h=-1,p=!1;for(q=0;q<d;q++)p?"0"===k[q]?A+=1:(p=!1,A>E&&(m=h,E=A)):"0"===k[q]&&(p=!0,h=q,A=1);A>E&&(m=h,E=A);1<E&&k.splice(m,E,"");m=k.length;d="";""===k[0]&&(d=":");for(q=0;q<m;q++){d+=k[q];if(q===m-1)break;d+=":"}""===k[m-1]&&(d+=":");return d},noConflict:function(){r.IPv6===this&&(r.IPv6=x);return this}}});
+(function(r){function x(l){throw new RangeError(H[l]);}function k(l,t){for(var C=l.length,y=[];C--;)y[C]=t(l[C]);return y}function m(l,t){var C=l.split("@"),y="";1<C.length&&(y=C[0]+"@",l=C[1]);l=l.replace(w,".");C=l.split(".");C=k(C,t).join(".");return y+C}function d(l){for(var t=[],C=0,y=l.length,J,M;C<y;)J=l.charCodeAt(C++),55296<=J&&56319>=J&&C<y?(M=l.charCodeAt(C++),56320==(M&64512)?t.push(((J&1023)<<10)+(M&1023)+65536):(t.push(J),C--)):t.push(J);return t}function q(l){return k(l,function(t){var C=
+    "";65535<t&&(t-=65536,C+=g(t>>>10&1023|55296),t=56320|t&1023);return C+=g(t)}).join("")}function E(l,t,C){var y=0;l=C?v(l/700):l>>1;for(l+=v(l/t);455<l;y+=36)l=v(l/35);return v(y+36*l/(l+38))}function A(l){var t=[],C=l.length,y=0,J=128,M=72,a,b;var c=l.lastIndexOf("-");0>c&&(c=0);for(a=0;a<c;++a)128<=l.charCodeAt(a)&&x("not-basic"),t.push(l.charCodeAt(a));for(c=0<c?c+1:0;c<C;){a=y;var e=1;for(b=36;;b+=36){c>=C&&x("invalid-input");var f=l.charCodeAt(c++);f=10>f-48?f-22:26>f-65?f-65:26>f-97?f-97:36;
+    (36<=f||f>v((2147483647-y)/e))&&x("overflow");y+=f*e;var n=b<=M?1:b>=M+26?26:b-M;if(f<n)break;f=36-n;e>v(2147483647/f)&&x("overflow");e*=f}e=t.length+1;M=E(y-a,e,0==a);v(y/e)>2147483647-J&&x("overflow");J+=v(y/e);y%=e;t.splice(y++,0,J)}return q(t)}function h(l){var t,C,y,J=[];l=d(l);var M=l.length;var a=128;var b=0;var c=72;for(y=0;y<M;++y){var e=l[y];128>e&&J.push(g(e))}for((t=C=J.length)&&J.push("-");t<M;){var f=2147483647;for(y=0;y<M;++y)e=l[y],e>=a&&e<f&&(f=e);var n=t+1;f-a>v((2147483647-b)/n)&&
+x("overflow");b+=(f-a)*n;a=f;for(y=0;y<M;++y)if(e=l[y],e<a&&2147483647<++b&&x("overflow"),e==a){var z=b;for(f=36;;f+=36){e=f<=c?1:f>=c+26?26:f-c;if(z<e)break;var I=z-e;z=36-e;var L=J;e+=I%z;L.push.call(L,g(e+22+75*(26>e)-0));z=v(I/z)}J.push(g(z+22+75*(26>z)-0));c=E(b,n,t==C);b=0;++t}++b;++a}return J.join("")}var p="object"==typeof exports&&exports&&!exports.nodeType&&exports,D="object"==typeof module&&module&&!module.nodeType&&module,u="object"==typeof global&&global;if(u.global===u||u.window===u||
+    u.self===u)r=u;var K=/^xn--/,F=/[^\x20-\x7E]/,w=/[\x2E\u3002\uFF0E\uFF61]/g,H={overflow:"Overflow: input needs wider integers to process","not-basic":"Illegal input >= 0x80 (not a basic code point)","invalid-input":"Invalid input"},v=Math.floor,g=String.fromCharCode,B;var G={version:"1.3.2",ucs2:{decode:d,encode:q},decode:A,encode:h,toASCII:function(l){return m(l,function(t){return F.test(t)?"xn--"+h(t):t})},toUnicode:function(l){return m(l,function(t){return K.test(t)?A(t.slice(4).toLowerCase()):
+        t})}};if("function"==typeof define&&"object"==typeof define.amd&&define.amd)define("punycode",function(){return G});else if(p&&D)if(module.exports==p)D.exports=G;else for(B in G)G.hasOwnProperty(B)&&(p[B]=G[B]);else r.punycode=G})(this);
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+        this._string="";this._parts=d._parts();var e=a instanceof d,f="object"===typeof a&&(a.hostname||a.path||a.pathname);a.nodeName&&(f=d.getDomAttribute(a),a=a[f]||"",f=!1);!e&&f&&void 0!==a.pathname&&(a=a.toString());if("string"===typeof a||a instanceof String)this._parts=d.parse(String(a),this._parts);else if(e||f){e=e?a._parts:a;for(c in e)"query"!==c&&B.call(this._parts,c)&&(this._parts[c]=e[c]);e.query&&this.query(e.query,!1)}else throw new TypeError("invalid input");this.build(!b);return this};
+    g.is=function(a){var b=!1,c=!1,e=!1,f=!1,n=!1,z=!1,I=!1,L=!this._parts.urn;this._parts.hostname&&(L=!1,c=d.ip4_expression.test(this._parts.hostname),e=d.ip6_expression.test(this._parts.hostname),b=c||e,n=(f=!b)&&k&&k.has(this._parts.hostname),z=f&&d.idn_expression.test(this._parts.hostname),I=f&&d.punycode_expression.test(this._parts.hostname));switch(a.toLowerCase()){case "relative":return L;case "absolute":return!L;case "domain":case "name":return f;case "sld":return n;case "ip":return b;case "ip4":case "ipv4":case "inet4":return c;
+        case "ip6":case "ipv6":case "inet6":return e;case "idn":return z;case "url":return!this._parts.urn;case "urn":return!!this._parts.urn;case "punycode":return I}return null};var C=g.protocol,y=g.port,J=g.hostname;g.protocol=function(a,b){if(a&&(a=a.replace(/:(\/\/)?$/,""),!a.match(d.protocol_expression)))throw new TypeError('Protocol "'+a+"\" contains characters other than [A-Z0-9.+-] or doesn't start with [A-Z]");return C.call(this,a,b)};g.scheme=g.protocol;g.port=function(a,b){if(this._parts.urn)return void 0===
+    a?"":this;void 0!==a&&(0===a&&(a=null),a&&(a+="",":"===a.charAt(0)&&(a=a.substring(1)),d.ensureValidPort(a)));return y.call(this,a,b)};g.hostname=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0!==a){var c={preventInvalidHostname:this._parts.preventInvalidHostname};if("/"!==d.parseHost(a,c))throw new TypeError('Hostname "'+a+'" contains characters other than [A-Z0-9.-]');a=c.hostname;this._parts.preventInvalidHostname&&d.ensureValidHostname(a,this._parts.protocol)}return J.call(this,
+        a,b)};g.origin=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a){var c=this.protocol();return this.authority()?(c?c+"://":"")+this.authority():""}c=d(a);this.protocol(c.protocol()).authority(c.authority()).build(!b);return this};g.host=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a)return this._parts.hostname?d.buildHost(this._parts):"";if("/"!==d.parseHost(a,this._parts))throw new TypeError('Hostname "'+a+'" contains characters other than [A-Z0-9.-]');
+        this.build(!b);return this};g.authority=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a)return this._parts.hostname?d.buildAuthority(this._parts):"";if("/"!==d.parseAuthority(a,this._parts))throw new TypeError('Hostname "'+a+'" contains characters other than [A-Z0-9.-]');this.build(!b);return this};g.userinfo=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a){var c=d.buildUserinfo(this._parts);return c?c.substring(0,c.length-1):c}"@"!==a[a.length-1]&&
+    (a+="@");d.parseUserinfo(a,this._parts);this.build(!b);return this};g.resource=function(a,b){if(void 0===a)return this.path()+this.search()+this.hash();var c=d.parse(a);this._parts.path=c.path;this._parts.query=c.query;this._parts.fragment=c.fragment;this.build(!b);return this};g.subdomain=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a){if(!this._parts.hostname||this.is("IP"))return"";var c=this._parts.hostname.length-this.domain().length-1;return this._parts.hostname.substring(0,
+        c)||""}c=this._parts.hostname.length-this.domain().length;c=this._parts.hostname.substring(0,c);c=new RegExp("^"+q(c));a&&"."!==a.charAt(a.length-1)&&(a+=".");if(-1!==a.indexOf(":"))throw new TypeError("Domains cannot contain colons");a&&d.ensureValidHostname(a,this._parts.protocol);this._parts.hostname=this._parts.hostname.replace(c,a);this.build(!b);return this};g.domain=function(a,b){if(this._parts.urn)return void 0===a?"":this;"boolean"===typeof a&&(b=a,a=void 0);if(void 0===a){if(!this._parts.hostname||
+        this.is("IP"))return"";var c=this._parts.hostname.match(/\./g);if(c&&2>c.length)return this._parts.hostname;c=this._parts.hostname.length-this.tld(b).length-1;c=this._parts.hostname.lastIndexOf(".",c-1)+1;return this._parts.hostname.substring(c)||""}if(!a)throw new TypeError("cannot set domain empty");if(-1!==a.indexOf(":"))throw new TypeError("Domains cannot contain colons");d.ensureValidHostname(a,this._parts.protocol);!this._parts.hostname||this.is("IP")?this._parts.hostname=a:(c=new RegExp(q(this.domain())+
+        "$"),this._parts.hostname=this._parts.hostname.replace(c,a));this.build(!b);return this};g.tld=function(a,b){if(this._parts.urn)return void 0===a?"":this;"boolean"===typeof a&&(b=a,a=void 0);if(void 0===a){if(!this._parts.hostname||this.is("IP"))return"";var c=this._parts.hostname.lastIndexOf(".");c=this._parts.hostname.substring(c+1);return!0!==b&&k&&k.list[c.toLowerCase()]?k.get(this._parts.hostname)||c:c}if(a)if(a.match(/[^a-zA-Z0-9-]/))if(k&&k.is(a))c=new RegExp(q(this.tld())+"$"),this._parts.hostname=
+        this._parts.hostname.replace(c,a);else throw new TypeError('TLD "'+a+'" contains characters other than [A-Z0-9]');else{if(!this._parts.hostname||this.is("IP"))throw new ReferenceError("cannot set TLD on non-domain host");c=new RegExp(q(this.tld())+"$");this._parts.hostname=this._parts.hostname.replace(c,a)}else throw new TypeError("cannot set TLD empty");this.build(!b);return this};g.directory=function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a||!0===a){if(!this._parts.path&&
+        !this._parts.hostname)return"";if("/"===this._parts.path)return"/";var c=this._parts.path.length-this.filename().length-1;c=this._parts.path.substring(0,c)||(this._parts.hostname?"/":"");return a?d.decodePath(c):c}c=this._parts.path.length-this.filename().length;c=this._parts.path.substring(0,c);c=new RegExp("^"+q(c));this.is("relative")||(a||(a="/"),"/"!==a.charAt(0)&&(a="/"+a));a&&"/"!==a.charAt(a.length-1)&&(a+="/");a=d.recodePath(a);this._parts.path=this._parts.path.replace(c,a);this.build(!b);
+        return this};g.filename=function(a,b){if(this._parts.urn)return void 0===a?"":this;if("string"!==typeof a){if(!this._parts.path||"/"===this._parts.path)return"";var c=this._parts.path.lastIndexOf("/");c=this._parts.path.substring(c+1);return a?d.decodePathSegment(c):c}c=!1;"/"===a.charAt(0)&&(a=a.substring(1));a.match(/\.?\//)&&(c=!0);var e=new RegExp(q(this.filename())+"$");a=d.recodePath(a);this._parts.path=this._parts.path.replace(e,a);c?this.normalizePath(b):this.build(!b);return this};g.suffix=
+        function(a,b){if(this._parts.urn)return void 0===a?"":this;if(void 0===a||!0===a){if(!this._parts.path||"/"===this._parts.path)return"";var c=this.filename(),e=c.lastIndexOf(".");if(-1===e)return"";c=c.substring(e+1);c=/^[a-z0-9%]+$/i.test(c)?c:"";return a?d.decodePathSegment(c):c}"."===a.charAt(0)&&(a=a.substring(1));if(c=this.suffix())e=a?new RegExp(q(c)+"$"):new RegExp(q("."+c)+"$");else{if(!a)return this;this._parts.path+="."+d.recodePath(a)}e&&(a=d.recodePath(a),this._parts.path=this._parts.path.replace(e,
+            a));this.build(!b);return this};g.segment=function(a,b,c){var e=this._parts.urn?":":"/",f=this.path(),n="/"===f.substring(0,1);f=f.split(e);void 0!==a&&"number"!==typeof a&&(c=b,b=a,a=void 0);if(void 0!==a&&"number"!==typeof a)throw Error('Bad segment "'+a+'", must be 0-based integer');n&&f.shift();0>a&&(a=Math.max(f.length+a,0));if(void 0===b)return void 0===a?f:f[a];if(null===a||void 0===f[a])if(A(b)){f=[];a=0;for(var z=b.length;a<z;a++)if(b[a].length||f.length&&f[f.length-1].length)f.length&&!f[f.length-
+    1].length&&f.pop(),f.push(u(b[a]))}else{if(b||"string"===typeof b)b=u(b),""===f[f.length-1]?f[f.length-1]=b:f.push(b)}else b?f[a]=u(b):f.splice(a,1);n&&f.unshift("");return this.path(f.join(e),c)};g.segmentCoded=function(a,b,c){var e;"number"!==typeof a&&(c=b,b=a,a=void 0);if(void 0===b){a=this.segment(a,b,c);if(A(a)){var f=0;for(e=a.length;f<e;f++)a[f]=d.decode(a[f])}else a=void 0!==a?d.decode(a):void 0;return a}if(A(b))for(f=0,e=b.length;f<e;f++)b[f]=d.encode(b[f]);else b="string"===typeof b||b instanceof
+    String?d.encode(b):b;return this.segment(a,b,c)};var M=g.query;g.query=function(a,b){if(!0===a)return d.parseQuery(this._parts.query,this._parts.escapeQuerySpace);if("function"===typeof a){var c=d.parseQuery(this._parts.query,this._parts.escapeQuerySpace),e=a.call(this,c);this._parts.query=d.buildQuery(e||c,this._parts.duplicateQueryParameters,this._parts.escapeQuerySpace);this.build(!b);return this}return void 0!==a&&"string"!==typeof a?(this._parts.query=d.buildQuery(a,this._parts.duplicateQueryParameters,
+        this._parts.escapeQuerySpace),this.build(!b),this):M.call(this,a,b)};g.setQuery=function(a,b,c){var e=d.parseQuery(this._parts.query,this._parts.escapeQuerySpace);if("string"===typeof a||a instanceof String)e[a]=void 0!==b?b:null;else if("object"===typeof a)for(var f in a)B.call(a,f)&&(e[f]=a[f]);else throw new TypeError("URI.addQuery() accepts an object, string as the name parameter");this._parts.query=d.buildQuery(e,this._parts.duplicateQueryParameters,this._parts.escapeQuerySpace);"string"!==typeof a&&
+    (c=b);this.build(!c);return this};g.addQuery=function(a,b,c){var e=d.parseQuery(this._parts.query,this._parts.escapeQuerySpace);d.addQuery(e,a,void 0===b?null:b);this._parts.query=d.buildQuery(e,this._parts.duplicateQueryParameters,this._parts.escapeQuerySpace);"string"!==typeof a&&(c=b);this.build(!c);return this};g.removeQuery=function(a,b,c){var e=d.parseQuery(this._parts.query,this._parts.escapeQuerySpace);d.removeQuery(e,a,b);this._parts.query=d.buildQuery(e,this._parts.duplicateQueryParameters,
+        this._parts.escapeQuerySpace);"string"!==typeof a&&(c=b);this.build(!c);return this};g.hasQuery=function(a,b,c){var e=d.parseQuery(this._parts.query,this._parts.escapeQuerySpace);return d.hasQuery(e,a,b,c)};g.setSearch=g.setQuery;g.addSearch=g.addQuery;g.removeSearch=g.removeQuery;g.hasSearch=g.hasQuery;g.normalize=function(){return this._parts.urn?this.normalizeProtocol(!1).normalizePath(!1).normalizeQuery(!1).normalizeFragment(!1).build():this.normalizeProtocol(!1).normalizeHostname(!1).normalizePort(!1).normalizePath(!1).normalizeQuery(!1).normalizeFragment(!1).build()};
+    g.normalizeProtocol=function(a){"string"===typeof this._parts.protocol&&(this._parts.protocol=this._parts.protocol.toLowerCase(),this.build(!a));return this};g.normalizeHostname=function(a){this._parts.hostname&&(this.is("IDN")&&r?this._parts.hostname=r.toASCII(this._parts.hostname):this.is("IPv6")&&x&&(this._parts.hostname=x.best(this._parts.hostname)),this._parts.hostname=this._parts.hostname.toLowerCase(),this.build(!a));return this};g.normalizePort=function(a){"string"===typeof this._parts.protocol&&
+    this._parts.port===d.defaultPorts[this._parts.protocol]&&(this._parts.port=null,this.build(!a));return this};g.normalizePath=function(a){var b=this._parts.path;if(!b)return this;if(this._parts.urn)return this._parts.path=d.recodeUrnPath(this._parts.path),this.build(!a),this;if("/"===this._parts.path)return this;b=d.recodePath(b);var c="";if("/"!==b.charAt(0)){var e=!0;b="/"+b}if("/.."===b.slice(-3)||"/."===b.slice(-2))b+="/";b=b.replace(/(\/(\.\/)+)|(\/\.$)/g,"/").replace(/\/{2,}/g,"/");e&&(c=b.substring(1).match(/^(\.\.\/)+/)||
+        "")&&(c=c[0]);for(;;){var f=b.search(/\/\.\.(\/|$)/);if(-1===f)break;else if(0===f){b=b.substring(3);continue}var n=b.substring(0,f).lastIndexOf("/");-1===n&&(n=f);b=b.substring(0,n)+b.substring(f+3)}e&&this.is("relative")&&(b=c+b.substring(1));this._parts.path=b;this.build(!a);return this};g.normalizePathname=g.normalizePath;g.normalizeQuery=function(a){"string"===typeof this._parts.query&&(this._parts.query.length?this.query(d.parseQuery(this._parts.query,this._parts.escapeQuerySpace)):this._parts.query=
+        null,this.build(!a));return this};g.normalizeFragment=function(a){this._parts.fragment||(this._parts.fragment=null,this.build(!a));return this};g.normalizeSearch=g.normalizeQuery;g.normalizeHash=g.normalizeFragment;g.iso8859=function(){var a=d.encode,b=d.decode;d.encode=escape;d.decode=decodeURIComponent;try{this.normalize()}finally{d.encode=a,d.decode=b}return this};g.unicode=function(){var a=d.encode,b=d.decode;d.encode=F;d.decode=unescape;try{this.normalize()}finally{d.encode=a,d.decode=b}return this};
+    g.readable=function(){var a=this.clone();a.username("").password("").normalize();var b="";a._parts.protocol&&(b+=a._parts.protocol+"://");a._parts.hostname&&(a.is("punycode")&&r?(b+=r.toUnicode(a._parts.hostname),a._parts.port&&(b+=":"+a._parts.port)):b+=a.host());a._parts.hostname&&a._parts.path&&"/"!==a._parts.path.charAt(0)&&(b+="/");b+=a.path(!0);if(a._parts.query){for(var c="",e=0,f=a._parts.query.split("&"),n=f.length;e<n;e++){var z=(f[e]||"").split("=");c+="&"+d.decodeQuery(z[0],this._parts.escapeQuerySpace).replace(/&/g,
+        "%26");void 0!==z[1]&&(c+="="+d.decodeQuery(z[1],this._parts.escapeQuerySpace).replace(/&/g,"%26"))}b+="?"+c.substring(1)}return b+=d.decodeQuery(a.hash(),!0)};g.absoluteTo=function(a){var b=this.clone(),c=["protocol","username","password","hostname","port"],e,f;if(this._parts.urn)throw Error("URNs do not have any generally defined hierarchical components");a instanceof d||(a=new d(a));if(b._parts.protocol)return b;b._parts.protocol=a._parts.protocol;if(this._parts.hostname)return b;for(e=0;f=c[e];e++)b._parts[f]=
+        a._parts[f];b._parts.path?(".."===b._parts.path.substring(-2)&&(b._parts.path+="/"),"/"!==b.path().charAt(0)&&(c=(c=a.directory())?c:0===a.path().indexOf("/")?"/":"",b._parts.path=(c?c+"/":"")+b._parts.path,b.normalizePath())):(b._parts.path=a._parts.path,b._parts.query||(b._parts.query=a._parts.query));b.build();return b};g.relativeTo=function(a){var b=this.clone().normalize();if(b._parts.urn)throw Error("URNs do not have any generally defined hierarchical components");a=(new d(a)).normalize();var c=
+        b._parts;var e=a._parts;var f=b.path();a=a.path();if("/"!==f.charAt(0))throw Error("URI is already relative");if("/"!==a.charAt(0))throw Error("Cannot calculate a URI relative to another relative URI");c.protocol===e.protocol&&(c.protocol=null);if(c.username===e.username&&c.password===e.password&&null===c.protocol&&null===c.username&&null===c.password&&c.hostname===e.hostname&&c.port===e.port)c.hostname=null,c.port=null;else return b.build();if(f===a)return c.path="",b.build();f=d.commonPath(f,a);
+        if(!f)return b.build();e=e.path.substring(f.length).replace(/[^\/]*$/,"").replace(/.*?\//g,"../");c.path=e+c.path.substring(f.length)||"./";return b.build()};g.equals=function(a){var b=this.clone(),c=new d(a);a={};var e;b.normalize();c.normalize();if(b.toString()===c.toString())return!0;var f=b.query();var n=c.query();b.query("");c.query("");if(b.toString()!==c.toString()||f.length!==n.length)return!1;b=d.parseQuery(f,this._parts.escapeQuerySpace);n=d.parseQuery(n,this._parts.escapeQuerySpace);for(e in b)if(B.call(b,
+        e)){if(!A(b[e])){if(b[e]!==n[e])return!1}else if(!D(b[e],n[e]))return!1;a[e]=!0}for(e in n)if(B.call(n,e)&&!a[e])return!1;return!0};g.preventInvalidHostname=function(a){this._parts.preventInvalidHostname=!!a;return this};g.duplicateQueryParameters=function(a){this._parts.duplicateQueryParameters=!!a;return this};g.escapeQuerySpace=function(a){this._parts.escapeQuerySpace=!!a;return this};return d});
+(function(r,x){"object"===typeof module&&module.exports?module.exports=x(require("./URI")):"function"===typeof define&&define.amd?define(["./URI"],x):r.URITemplate=x(r.URI,r)})(this,function(r,x){function k(h){if(k._cache[h])return k._cache[h];if(!(this instanceof k))return new k(h);this.expression=h;k._cache[h]=this;return this}function m(h){this.data=h;this.cache={}}var d=x&&x.URITemplate,q=Object.prototype.hasOwnProperty,E=k.prototype,A={"":{prefix:"",separator:",",named:!1,empty_name_separator:!1,
+        encode:"encode"},"+":{prefix:"",separator:",",named:!1,empty_name_separator:!1,encode:"encodeReserved"},"#":{prefix:"#",separator:",",named:!1,empty_name_separator:!1,encode:"encodeReserved"},".":{prefix:".",separator:".",named:!1,empty_name_separator:!1,encode:"encode"},"/":{prefix:"/",separator:"/",named:!1,empty_name_separator:!1,encode:"encode"},";":{prefix:";",separator:";",named:!0,empty_name_separator:!1,encode:"encode"},"?":{prefix:"?",separator:"&",named:!0,empty_name_separator:!0,encode:"encode"},
+    "&":{prefix:"&",separator:"&",named:!0,empty_name_separator:!0,encode:"encode"}};k._cache={};k.EXPRESSION_PATTERN=/\{([^a-zA-Z0-9%_]?)([^\}]+)(\}|$)/g;k.VARIABLE_PATTERN=/^([^*:.](?:\.?[^*:.])*)((\*)|:(\d+))?$/;k.VARIABLE_NAME_PATTERN=/[^a-zA-Z0-9%_.]/;k.LITERAL_PATTERN=/[<>{}"`^| \\]/;k.expand=function(h,p,D){var u=A[h.operator],K=u.named?"Named":"Unnamed";h=h.variables;var F=[],w,H;for(H=0;w=h[H];H++){var v=p.get(w.name);if(0===v.type&&D&&D.strict)throw Error('Missing expansion value for variable "'+
+    w.name+'"');if(v.val.length){if(1<v.type&&w.maxlength)throw Error('Invalid expression: Prefix modifier not applicable to variable "'+w.name+'"');F.push(k["expand"+K](v,u,w.explode,w.explode&&u.separator||",",w.maxlength,w.name))}else v.type&&F.push("")}return F.length?u.prefix+F.join(u.separator):""};k.expandNamed=function(h,p,D,u,K,F){var w="",H=p.encode;p=p.empty_name_separator;var v=!h[H].length,g=2===h.type?"":r[H](F),B;var G=0;for(B=h.val.length;G<B;G++){if(K){var l=r[H](h.val[G][1].substring(0,
+    K));2===h.type&&(g=r[H](h.val[G][0].substring(0,K)))}else v?(l=r[H](h.val[G][1]),2===h.type?(g=r[H](h.val[G][0]),h[H].push([g,l])):h[H].push([void 0,l])):(l=h[H][G][1],2===h.type&&(g=h[H][G][0]));w&&(w+=u);D?w+=g+(p||l?"=":"")+l:(G||(w+=r[H](F)+(p||l?"=":"")),2===h.type&&(w+=g+","),w+=l)}return w};k.expandUnnamed=function(h,p,D,u,K){var F="",w=p.encode;p=p.empty_name_separator;var H=!h[w].length,v;var g=0;for(v=h.val.length;g<v;g++){if(K)var B=r[w](h.val[g][1].substring(0,K));else H?(B=r[w](h.val[g][1]),
+    h[w].push([2===h.type?r[w](h.val[g][0]):void 0,B])):B=h[w][g][1];F&&(F+=u);if(2===h.type){var G=K?r[w](h.val[g][0].substring(0,K)):h[w][g][0];F+=G;F=D?F+(p||B?"=":""):F+","}F+=B}return F};k.noConflict=function(){x.URITemplate===k&&(x.URITemplate=d);return k};E.expand=function(h,p){var D="";this.parts&&this.parts.length||this.parse();h instanceof m||(h=new m(h));for(var u=0,K=this.parts.length;u<K;u++)D+="string"===typeof this.parts[u]?this.parts[u]:k.expand(this.parts[u],h,p);return D};E.parse=function(){var h=
+    this.expression,p=k.EXPRESSION_PATTERN,D=k.VARIABLE_PATTERN,u=k.VARIABLE_NAME_PATTERN,K=k.LITERAL_PATTERN,F=[],w=0,H=function(t){if(t.match(K))throw Error('Invalid Literal "'+t+'"');return t};for(p.lastIndex=0;;){var v=p.exec(h);if(null===v){F.push(H(h.substring(w)));break}else F.push(H(h.substring(w,v.index))),w=v.index+v[0].length;if(!A[v[1]])throw Error('Unknown Operator "'+v[1]+'" in "'+v[0]+'"');if(!v[3])throw Error('Unclosed Expression "'+v[0]+'"');var g=v[2].split(",");for(var B=0,G=g.length;B<
+G;B++){var l=g[B].match(D);if(null===l)throw Error('Invalid Variable "'+g[B]+'" in "'+v[0]+'"');if(l[1].match(u))throw Error('Invalid Variable Name "'+l[1]+'" in "'+v[0]+'"');g[B]={name:l[1],explode:!!l[3],maxlength:l[4]&&parseInt(l[4],10)}}if(!g.length)throw Error('Expression Missing Variable(s) "'+v[0]+'"');F.push({expression:v[0],operator:v[1],variables:g})}F.length||F.push(H(h));this.parts=F;return this};m.prototype.get=function(h){var p=this.data,D={type:0,val:[],encode:[],encodeReserved:[]};
+    if(void 0!==this.cache[h])return this.cache[h];this.cache[h]=D;p="[object Function]"===String(Object.prototype.toString.call(p))?p(h):"[object Function]"===String(Object.prototype.toString.call(p[h]))?p[h](h):p[h];if(void 0!==p&&null!==p)if("[object Array]"===String(Object.prototype.toString.call(p))){var u=0;for(h=p.length;u<h;u++)void 0!==p[u]&&null!==p[u]&&D.val.push([void 0,String(p[u])]);D.val.length&&(D.type=3)}else if("[object Object]"===String(Object.prototype.toString.call(p))){for(u in p)q.call(p,
+        u)&&void 0!==p[u]&&null!==p[u]&&D.val.push([u,String(p[u])]);D.val.length&&(D.type=2)}else D.type=1,D.val.push([void 0,String(p)]);return D};r.expand=function(h,p){var D=(new k(h)).expand(p);return new r(D)};return k});

web/assets/[email protected]/vue.common.dev.js

@@ -0,0 +1,11959 @@
+/*!
+ * Vue.js v2.6.12
+ * (c) 2014-2020 Evan You
+ * Released under the MIT License.
+ */
+'use strict';
+
+/*  */
+
+var emptyObject = Object.freeze({});
+
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive.
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value, e.g., [object Object].
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert an input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if an attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array.
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
+    }
+  }
+}
+
+/**
+ * Check whether an object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
+ */
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
+    }
+  }
+  return res
+}
+
+/* eslint-disable no-unused-vars */
+
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+ */
+function noop (a, b, c) {}
+
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
+
+/* eslint-enable no-unused-vars */
+
+/**
+ * Return the same value.
+ */
+var identity = function (_) { return _; };
+
+/**
+ * Generate a string containing static keys from compiler modules.
+ */
+function genStaticKeys (modules) {
+  return modules.reduce(function (keys, m) {
+    return keys.concat(m.staticKeys || [])
+  }, []).join(',')
+}
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured',
+  'serverPrefetch'
+];
+
+/*  */
+
+
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: "development" !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: "development" !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+{
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm;
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
+    }
+
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
+
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
+
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  if (!config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode) {
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    vnode.componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
+  cloned.isCloned = true;
+  return cloned
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
+ */
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
+
+/**
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatch updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through all properties and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive$$1(obj, keys[i]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment a target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment a target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    shouldObserve &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive$$1 (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if (customSetter) {
+        customSetter();
+      }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive$$1(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+{
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  var res = childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && "development" !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
+    }
+  }
+
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if (warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
+    observe(value);
+    toggleObserving(prevShouldObserve);
+  }
+  {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if (isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i]);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+
+  if (!valid) {
+    warn(
+      getInvalidTypeMessage(name, value, expectedTypes),
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+
+function assertType (value, type) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    valid = value instanceof type;
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  return match ? match[1] : ''
+}
+
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
+  }
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
+    }
+  }
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  var expectedValue = styleValue(value, expectedType);
+  var receivedValue = styleValue(value, receivedType);
+  // check if we need to specify expected value
+  if (expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      !isBoolean(expectedType, receivedType)) {
+    message += " with value " + expectedValue;
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + receivedValue + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+function isExplicable (value) {
+  var explicitTypes = ['string', 'number', 'boolean'];
+  return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
+          }
+        }
+      }
+    }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
+  }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+
+var isUsingMicroTask = false;
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  timerFunc = function () {
+    p.then(flushCallbacks);
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else {
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    timerFunc();
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+var mark;
+var measure;
+
+{
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      // perf.clearMeasures(name)
+    };
+  }
+}
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+{
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' && isNative(Proxy);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+      if (!has && !isAllowed) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns, vm) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+      }
+    } else {
+      // return handler return value for single handlers
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  createOnceHandler,
+  vm
+) {
+  var name, def$$1, cur, old, event;
+  for (name in on) {
+    def$$1 = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    if (isUndef(cur)) {
+      warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      {
+        var keyInLowerCase = key.toLowerCase();
+        if (
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
+        ) {
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
+        }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
+    }
+  }
+  return res
+}
+
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
+        }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      }
+    });
+    toggleObserving(true);
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
+  }
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  if (!children || !children.length) {
+    return {}
+  }
+  var slots = {};
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    return res && (
+      res.length === 0 ||
+      (res.length === 1 && res[0].isComment) // #9658
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallback,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) { // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (!isObject(bindObject)) {
+        warn(
+          'slot v-bind without argument expects an Object',
+          this
+        );
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes = scopedSlotFn(props) || fallback;
+  } else {
+    nodes = this.$slots[name] || fallback;
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
+    }
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
+
+/*  */
+
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
+};
+
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  vnode, // we know it's MountedComponentVNode but flow doesn't
+  parent // activeInstance in lifecycle state
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (isDef(data) && isDef(data.nativeOn)) {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
+
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
+  {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  }
+}
+
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                "timeout (" + (res.timeout) + "ms)"
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
+  }
+}
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if (config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (!config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = expOrFn.toString();
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        try {
+          this.cb.call(this.vm, value, oldValue);
+        } catch (e) {
+          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+        }
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      }
+    }
+  }
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      try {
+        cb.call(vm, watcher.value);
+      } catch (error) {
+        handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
+      }
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+var uid$3 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$3++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
+    }
+
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
+        vm
+      );
+    }
+    /* istanbul ignore else */
+    {
+      initProxy(vm);
+    }
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
+
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    }
+
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = latest[key];
+    }
+  }
+  return modified
+}
+
+function Vue (options) {
+  if (!(this instanceof Vue)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if (name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
+    };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
+
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
+    }
+
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
+    }
+
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
+
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
+
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
+
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
+
+/*  */
+
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
+    ) {
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if (type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
+    };
+  });
+}
+
+/*  */
+
+
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var cachedNode = cache[key];
+    if (cachedNode) {
+      var name = getComponentName(cachedNode.componentOptions);
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var cached$$1 = cache[key];
+  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
+    cached$$1.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        cache[key] = vnode;
+        keys.push(key);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive$$1
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue);
+
+Object.defineProperty(Vue.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue.prototype, '$ssrContext', {
+  get: function get () {
+    /* istanbul ignore next */
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
+
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.12';
+
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isPreTag = function (tag) { return tag === 'pre'; };
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!isDef(key)) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        a.asyncFactory === b.asyncFactory &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove$$1.listeners = listeners;
+    return remove$$1
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
+    }
+
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
+
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
+
+      if (data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
+
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
+
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setStyleScope(vnode.elm, i);
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
+    ) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
+        }
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        {
+          checkDuplicateKeys(ch);
+        }
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
+            }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
+                break
+              }
+              childNode = childNode.nextSibling;
+            }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
+        }
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
+        }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
+
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
+
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
+
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
+
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
+            } else {
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
+            }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
+        }
+
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
+            }
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
+                }
+              }
+            } else {
+              registerRef(ancestor);
+            }
+            ancestor = ancestor.parent;
+          }
+        }
+
+        // destroy old node
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
+        }
+      }
+    }
+
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
+    }
+  }
+
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
+    };
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
+    }
+  }
+
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
+
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
+    }
+  }
+}
+
+var emptyModifiers = Object.create(null);
+
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
+    }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
+
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+    }
+  }
+}
+
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur);
+    }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
+    }
+  }
+}
+
+function setAttr (el, key, value) {
+  if (el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
+    }
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, convertEnumeratedValue(key, value));
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
+    }
+  } else {
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
+    }
+    el.setAttribute(key, value);
+  }
+}
+
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
+
+/*  */
+
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
+
+  var cls = genClassForVnode(vnode);
+
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
+
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
+
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+function parseFilters (exp) {
+  var inSingle = false;
+  var inDouble = false;
+  var inTemplateString = false;
+  var inRegex = false;
+  var curly = 0;
+  var square = 0;
+  var paren = 0;
+  var lastFilterIndex = 0;
+  var c, prev, i, expression, filters;
+
+  for (i = 0; i < exp.length; i++) {
+    prev = c;
+    c = exp.charCodeAt(i);
+    if (inSingle) {
+      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+    } else if (inDouble) {
+      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+    } else if (inTemplateString) {
+      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+    } else if (inRegex) {
+      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+    } else if (
+      c === 0x7C && // pipe
+      exp.charCodeAt(i + 1) !== 0x7C &&
+      exp.charCodeAt(i - 1) !== 0x7C &&
+      !curly && !square && !paren
+    ) {
+      if (expression === undefined) {
+        // first filter, end of expression
+        lastFilterIndex = i + 1;
+        expression = exp.slice(0, i).trim();
+      } else {
+        pushFilter();
+      }
+    } else {
+      switch (c) {
+        case 0x22: inDouble = true; break         // "
+        case 0x27: inSingle = true; break         // '
+        case 0x60: inTemplateString = true; break // `
+        case 0x28: paren++; break                 // (
+        case 0x29: paren--; break                 // )
+        case 0x5B: square++; break                // [
+        case 0x5D: square--; break                // ]
+        case 0x7B: curly++; break                 // {
+        case 0x7D: curly--; break                 // }
+      }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !validDivisionCharRE.test(p)) {
+          inRegex = true;
+        }
+      }
+    }
+  }
+
+  if (expression === undefined) {
+    expression = exp.slice(0, i).trim();
+  } else if (lastFilterIndex !== 0) {
+    pushFilter();
+  }
+
+  function pushFilter () {
+    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+    lastFilterIndex = i + 1;
+  }
+
+  if (filters) {
+    for (i = 0; i < filters.length; i++) {
+      expression = wrapFilter(expression, filters[i]);
+    }
+  }
+
+  return expression
+}
+
+function wrapFilter (exp, filter) {
+  var i = filter.indexOf('(');
+  if (i < 0) {
+    // _f: resolveFilter
+    return ("_f(\"" + filter + "\")(" + exp + ")")
+  } else {
+    var name = filter.slice(0, i);
+    var args = filter.slice(i + 1);
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+  }
+}
+
+/*  */
+
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
+  console.error(("[Vue compiler]: " + msg));
+}
+/* eslint-enable no-unused-vars */
+
+function pluckModuleFunction (
+  modules,
+  key
+) {
+  return modules
+    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+    : []
+}
+
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+  el.plain = false;
+}
+
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+  el.plain = false;
+}
+
+// add a raw attr (use this in preTransforms)
+function addRawAttr (el, name, value, range) {
+  el.attrsMap[name] = value;
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
+}
+
+function addDirective (
+  el,
+  name,
+  rawName,
+  value,
+  arg,
+  isDynamicArg,
+  modifiers,
+  range
+) {
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
+  el.plain = false;
+}
+
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
+function addHandler (
+  el,
+  name,
+  value,
+  modifiers,
+  important,
+  warn,
+  range,
+  dynamic
+) {
+  modifiers = modifiers || emptyObject;
+  // warn prevent and passive modifier
+  /* istanbul ignore if */
+  if (
+    warn &&
+    modifiers.prevent && modifiers.passive
+  ) {
+    warn(
+      'passive and prevent can\'t be used together. ' +
+      'Passive handler can\'t prevent default event.',
+      range
+    );
+  }
+
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
+  // check capture modifier
+  if (modifiers.capture) {
+    delete modifiers.capture;
+    name = prependModifierMarker('!', name, dynamic);
+  }
+  if (modifiers.once) {
+    delete modifiers.once;
+    name = prependModifierMarker('~', name, dynamic);
+  }
+  /* istanbul ignore if */
+  if (modifiers.passive) {
+    delete modifiers.passive;
+    name = prependModifierMarker('&', name, dynamic);
+  }
+
+  var events;
+  if (modifiers.native) {
+    delete modifiers.native;
+    events = el.nativeEvents || (el.nativeEvents = {});
+  } else {
+    events = el.events || (el.events = {});
+  }
+
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+  if (modifiers !== emptyObject) {
+    newHandler.modifiers = modifiers;
+  }
+
+  var handlers = events[name];
+  /* istanbul ignore if */
+  if (Array.isArray(handlers)) {
+    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+  } else if (handlers) {
+    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+  } else {
+    events[name] = newHandler;
+  }
+
+  el.plain = false;
+}
+
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
+function getBindingAttr (
+  el,
+  name,
+  getStatic
+) {
+  var dynamicValue =
+    getAndRemoveAttr(el, ':' + name) ||
+    getAndRemoveAttr(el, 'v-bind:' + name);
+  if (dynamicValue != null) {
+    return parseFilters(dynamicValue)
+  } else if (getStatic !== false) {
+    var staticValue = getAndRemoveAttr(el, name);
+    if (staticValue != null) {
+      return JSON.stringify(staticValue)
+    }
+  }
+}
+
+// note: this only removes the attr from the Array (attrsList) so that it
+// doesn't get processed by processAttrs.
+// By default it does NOT remove it from the map (attrsMap) because the map is
+// needed during codegen.
+function getAndRemoveAttr (
+  el,
+  name,
+  removeFromMap
+) {
+  var val;
+  if ((val = el.attrsMap[name]) != null) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      if (list[i].name === name) {
+        list.splice(i, 1);
+        break
+      }
+    }
+  }
+  if (removeFromMap) {
+    delete el.attrsMap[name];
+  }
+  return val
+}
+
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
+/*  */
+
+/**
+ * Cross-platform code generation for component v-model
+ */
+function genComponentModel (
+  el,
+  value,
+  modifiers
+) {
+  var ref = modifiers || {};
+  var number = ref.number;
+  var trim = ref.trim;
+
+  var baseValueExpression = '$$v';
+  var valueExpression = baseValueExpression;
+  if (trim) {
+    valueExpression =
+      "(typeof " + baseValueExpression + " === 'string'" +
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+  var assignment = genAssignmentCode(value, valueExpression);
+
+  el.model = {
+    value: ("(" + value + ")"),
+    expression: JSON.stringify(value),
+    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+  };
+}
+
+/**
+ * Cross-platform codegen helper for generating v-model value assignment code.
+ */
+function genAssignmentCode (
+  value,
+  assignment
+) {
+  var res = parseModel(value);
+  if (res.key === null) {
+    return (value + "=" + assignment)
+  } else {
+    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
+  }
+}
+
+/**
+ * Parse a v-model expression into a base path and a final key segment.
+ * Handles both dot-path and possible square brackets.
+ *
+ * Possible cases:
+ *
+ * - test
+ * - test[key]
+ * - test[test1[key]]
+ * - test["a"][key]
+ * - xxx.test[a[a].test1[key]]
+ * - test.xxx.a["asa"][test1[key]]
+ *
+ */
+
+var len, str, chr, index$1, expressionPos, expressionEndPos;
+
+
+
+function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
+  len = val.length;
+
+  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+    index$1 = val.lastIndexOf('.');
+    if (index$1 > -1) {
+      return {
+        exp: val.slice(0, index$1),
+        key: '"' + val.slice(index$1 + 1) + '"'
+      }
+    } else {
+      return {
+        exp: val,
+        key: null
+      }
+    }
+  }
+
+  str = val;
+  index$1 = expressionPos = expressionEndPos = 0;
+
+  while (!eof()) {
+    chr = next();
+    /* istanbul ignore if */
+    if (isStringStart(chr)) {
+      parseString(chr);
+    } else if (chr === 0x5B) {
+      parseBracket(chr);
+    }
+  }
+
+  return {
+    exp: val.slice(0, expressionPos),
+    key: val.slice(expressionPos + 1, expressionEndPos)
+  }
+}
+
+function next () {
+  return str.charCodeAt(++index$1)
+}
+
+function eof () {
+  return index$1 >= len
+}
+
+function isStringStart (chr) {
+  return chr === 0x22 || chr === 0x27
+}
+
+function parseBracket (chr) {
+  var inBracket = 1;
+  expressionPos = index$1;
+  while (!eof()) {
+    chr = next();
+    if (isStringStart(chr)) {
+      parseString(chr);
+      continue
+    }
+    if (chr === 0x5B) { inBracket++; }
+    if (chr === 0x5D) { inBracket--; }
+    if (inBracket === 0) {
+      expressionEndPos = index$1;
+      break
+    }
+  }
+}
+
+function parseString (chr) {
+  var stringQuote = chr;
+  while (!eof()) {
+    chr = next();
+    if (chr === stringQuote) {
+      break
+    }
+  }
+}
+
+/*  */
+
+var warn$1;
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+function model (
+  el,
+  dir,
+  _warn
+) {
+  warn$1 = _warn;
+  var value = dir.value;
+  var modifiers = dir.modifiers;
+  var tag = el.tag;
+  var type = el.attrsMap.type;
+
+  {
+    // inputs with type="file" are read only and setting the input's
+    // value will throw an error.
+    if (tag === 'input' && type === 'file') {
+      warn$1(
+        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+        "File inputs are read only. Use a v-on:change listener instead.",
+        el.rawAttrsMap['v-model']
+      );
+    }
+  }
+
+  if (el.component) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else if (tag === 'select') {
+    genSelect(el, value, modifiers);
+  } else if (tag === 'input' && type === 'checkbox') {
+    genCheckboxModel(el, value, modifiers);
+  } else if (tag === 'input' && type === 'radio') {
+    genRadioModel(el, value, modifiers);
+  } else if (tag === 'input' || tag === 'textarea') {
+    genDefaultModel(el, value, modifiers);
+  } else if (!config.isReservedTag(tag)) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else {
+    warn$1(
+      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+      "v-model is not supported on this element type. " +
+      'If you are working with contenteditable, it\'s recommended to ' +
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
+    );
+  }
+
+  // ensure runtime directive metadata
+  return true
+}
+
+function genCheckboxModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+  addProp(el, 'checked',
+    "Array.isArray(" + value + ")" +
+    "?_i(" + value + "," + valueBinding + ")>-1" + (
+      trueValueBinding === 'true'
+        ? (":(" + value + ")")
+        : (":_q(" + value + "," + trueValueBinding + ")")
+    )
+  );
+  addHandler(el, 'change',
+    "var $$a=" + value + "," +
+        '$$el=$event.target,' +
+        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+    'if(Array.isArray($$a)){' +
+      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+          '$$i=_i($$a,$$v);' +
+      "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+      "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+    null, true
+  );
+}
+
+function genRadioModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+}
+
+function genSelect (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var selectedVal = "Array.prototype.filter" +
+    ".call($event.target.options,function(o){return o.selected})" +
+    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+    "return " + (number ? '_n(val)' : 'val') + "})";
+
+  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+  var code = "var $$selectedVal = " + selectedVal + ";";
+  code = code + " " + (genAssignmentCode(value, assignment));
+  addHandler(el, 'change', code, null, true);
+}
+
+function genDefaultModel (
+  el,
+  value,
+  modifiers
+) {
+  var type = el.attrsMap.type;
+
+  // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
+  {
+    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value$1 && !typeBinding) {
+      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+      warn$1(
+        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
+      );
+    }
+  }
+
+  var ref = modifiers || {};
+  var lazy = ref.lazy;
+  var number = ref.number;
+  var trim = ref.trim;
+  var needCompositionGuard = !lazy && type !== 'range';
+  var event = lazy
+    ? 'change'
+    : type === 'range'
+      ? RANGE_TOKEN
+      : 'input';
+
+  var valueExpression = '$event.target.value';
+  if (trim) {
+    valueExpression = "$event.target.value.trim()";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+
+  var code = genAssignmentCode(value, valueExpression);
+  if (needCompositionGuard) {
+    code = "if($event.target.composing)return;" + code;
+  }
+
+  addProp(el, 'value', ("(" + value + ")"));
+  addHandler(el, event, code, null, true);
+  if (trim || number) {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
+}
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+function add$1 (
+  name,
+  handler,
+  capture,
+  passive
+) {
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
+  target$1.addEventListener(
+    name,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  name,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    name,
+    handler._wrapper || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+var svgContainer;
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (!(key in props)) {
+      elm[key] = '';
+    }
+  }
+
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
+    }
+
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
+    }
+  }
+}
+
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
+  }
+  return value !== newVal
+}
+
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
+
+/*  */
+
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+    }
+  });
+  return res
+});
+
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
+
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
+
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
+    }
+  }
+
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
+
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
+    }
+  }
+  return res
+}
+
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
+    }
+  }
+};
+
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+});
+
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
+    }
+  }
+}
+
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+var whitespaceRE = /\s+/;
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
+    }
+  }
+}
+
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
+    }
+    if (!el.classList.length) {
+      el.removeAttribute('class');
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
+    }
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
+    }
+  }
+}
+
+/*  */
+
+function resolveTransition (def$$1) {
+  if (!def$$1) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def$$1 === 'object') {
+    var res = {};
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
+    }
+    extend(res, def$$1);
+    return res
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
+  }
+}
+
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
+    }
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
+    }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
+
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
+    }
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
+    }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
+
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
+
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
+
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
+function toMs (s) {
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
+}
+
+/*  */
+
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
+
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    context = transitionNode.context;
+    transitionNode = transitionNode.parent;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if (explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
+    }
+    el._enterCb = null;
+  });
+
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
+    });
+  }
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      }
+    });
+  }
+
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if (isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show && el.parentNode) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
+      }
+    }
+  },
+
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
+        }
+      }
+    }
+  }
+};
+
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
+        }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (!value === !oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
+    }
+
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(isNotTextNode);
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
+
+    // warn multiple elements
+    if (children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if (mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
+
+// install platform patch function
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
+      console[console.info ? 'info' : 'log'](
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
+      );
+    }
+  }, 0);
+}
+
+/*  */
+
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+
+var buildRegex = cached(function (delimiters) {
+  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+});
+
+
+
+function parseText (
+  text,
+  delimiters
+) {
+  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+  if (!tagRE.test(text)) {
+    return
+  }
+  var tokens = [];
+  var rawTokens = [];
+  var lastIndex = tagRE.lastIndex = 0;
+  var match, index, tokenValue;
+  while ((match = tagRE.exec(text))) {
+    index = match.index;
+    // push text token
+    if (index > lastIndex) {
+      rawTokens.push(tokenValue = text.slice(lastIndex, index));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    // tag token
+    var exp = parseFilters(match[1].trim());
+    tokens.push(("_s(" + exp + ")"));
+    rawTokens.push({ '@binding': exp });
+    lastIndex = index + match[0].length;
+  }
+  if (lastIndex < text.length) {
+    rawTokens.push(tokenValue = text.slice(lastIndex));
+    tokens.push(JSON.stringify(tokenValue));
+  }
+  return {
+    expression: tokens.join('+'),
+    tokens: rawTokens
+  }
+}
+
+/*  */
+
+function transformNode (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticClass = getAndRemoveAttr(el, 'class');
+  if (staticClass) {
+    var res = parseText(staticClass, options.delimiters);
+    if (res) {
+      warn(
+        "class=\"" + staticClass + "\": " +
+        'Interpolation inside attributes has been removed. ' +
+        'Use v-bind or the colon shorthand instead. For example, ' +
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
+      );
+    }
+  }
+  if (staticClass) {
+    el.staticClass = JSON.stringify(staticClass);
+  }
+  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+  if (classBinding) {
+    el.classBinding = classBinding;
+  }
+}
+
+function genData (el) {
+  var data = '';
+  if (el.staticClass) {
+    data += "staticClass:" + (el.staticClass) + ",";
+  }
+  if (el.classBinding) {
+    data += "class:" + (el.classBinding) + ",";
+  }
+  return data
+}
+
+var klass$1 = {
+  staticKeys: ['staticClass'],
+  transformNode: transformNode,
+  genData: genData
+};
+
+/*  */
+
+function transformNode$1 (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticStyle = getAndRemoveAttr(el, 'style');
+  if (staticStyle) {
+    /* istanbul ignore if */
+    {
+      var res = parseText(staticStyle, options.delimiters);
+      if (res) {
+        warn(
+          "style=\"" + staticStyle + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
+        );
+      }
+    }
+    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+  }
+
+  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+  if (styleBinding) {
+    el.styleBinding = styleBinding;
+  }
+}
+
+function genData$1 (el) {
+  var data = '';
+  if (el.staticStyle) {
+    data += "staticStyle:" + (el.staticStyle) + ",";
+  }
+  if (el.styleBinding) {
+    data += "style:(" + (el.styleBinding) + "),";
+  }
+  return data
+}
+
+var style$1 = {
+  staticKeys: ['staticStyle'],
+  transformNode: transformNode$1,
+  genData: genData$1
+};
+
+/*  */
+
+var decoder;
+
+var he = {
+  decode: function decode (html) {
+    decoder = decoder || document.createElement('div');
+    decoder.innerHTML = html;
+    return decoder.textContent
+  }
+};
+
+/*  */
+
+var isUnaryTag = makeMap(
+  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+  'link,meta,param,source,track,wbr'
+);
+
+// Elements that you can, intentionally, leave open
+// (and which close themselves)
+var canBeLeftOpenTag = makeMap(
+  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+);
+
+// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+var isNonPhrasingTag = makeMap(
+  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+  'title,tr,track'
+);
+
+/**
+ * Not type-checking this file because it's mostly vendor code.
+ */
+
+// Regular Expressions for parsing tags and attributes
+var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+var startTagOpen = new RegExp(("^<" + qnameCapture));
+var startTagClose = /^\s*(\/?)>/;
+var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+var doctype = /^<!DOCTYPE [^>]+>/i;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
+var conditionalComment = /^<!\[/;
+
+// Special Elements (can contain anything)
+var isPlainTextElement = makeMap('script,style,textarea', true);
+var reCache = {};
+
+var decodingMap = {
+  '&lt;': '<',
+  '&gt;': '>',
+  '&quot;': '"',
+  '&amp;': '&',
+  '&#10;': '\n',
+  '&#9;': '\t',
+  '&#39;': "'"
+};
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+// #5992
+var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+function decodeAttr (value, shouldDecodeNewlines) {
+  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+  return value.replace(re, function (match) { return decodingMap[match]; })
+}
+
+function parseHTML (html, options) {
+  var stack = [];
+  var expectHTML = options.expectHTML;
+  var isUnaryTag$$1 = options.isUnaryTag || no;
+  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+  var index = 0;
+  var last, lastTag;
+  while (html) {
+    last = html;
+    // Make sure we're not in a plaintext content element like script/style
+    if (!lastTag || !isPlainTextElement(lastTag)) {
+      var textEnd = html.indexOf('<');
+      if (textEnd === 0) {
+        // Comment:
+        if (comment.test(html)) {
+          var commentEnd = html.indexOf('-->');
+
+          if (commentEnd >= 0) {
+            if (options.shouldKeepComment) {
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+            }
+            advance(commentEnd + 3);
+            continue
+          }
+        }
+
+        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+        if (conditionalComment.test(html)) {
+          var conditionalEnd = html.indexOf(']>');
+
+          if (conditionalEnd >= 0) {
+            advance(conditionalEnd + 2);
+            continue
+          }
+        }
+
+        // Doctype:
+        var doctypeMatch = html.match(doctype);
+        if (doctypeMatch) {
+          advance(doctypeMatch[0].length);
+          continue
+        }
+
+        // End tag:
+        var endTagMatch = html.match(endTag);
+        if (endTagMatch) {
+          var curIndex = index;
+          advance(endTagMatch[0].length);
+          parseEndTag(endTagMatch[1], curIndex, index);
+          continue
+        }
+
+        // Start tag:
+        var startTagMatch = parseStartTag();
+        if (startTagMatch) {
+          handleStartTag(startTagMatch);
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+            advance(1);
+          }
+          continue
+        }
+      }
+
+      var text = (void 0), rest = (void 0), next = (void 0);
+      if (textEnd >= 0) {
+        rest = html.slice(textEnd);
+        while (
+          !endTag.test(rest) &&
+          !startTagOpen.test(rest) &&
+          !comment.test(rest) &&
+          !conditionalComment.test(rest)
+        ) {
+          // < in plain text, be forgiving and treat it as text
+          next = rest.indexOf('<', 1);
+          if (next < 0) { break }
+          textEnd += next;
+          rest = html.slice(textEnd);
+        }
+        text = html.substring(0, textEnd);
+      }
+
+      if (textEnd < 0) {
+        text = html;
+      }
+
+      if (text) {
+        advance(text.length);
+      }
+
+      if (options.chars && text) {
+        options.chars(text, index - text.length, index);
+      }
+    } else {
+      var endTagLength = 0;
+      var stackedTag = lastTag.toLowerCase();
+      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+        endTagLength = endTag.length;
+        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+          text = text
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+        }
+        if (shouldIgnoreFirstNewline(stackedTag, text)) {
+          text = text.slice(1);
+        }
+        if (options.chars) {
+          options.chars(text);
+        }
+        return ''
+      });
+      index += html.length - rest$1.length;
+      html = rest$1;
+      parseEndTag(stackedTag, index - endTagLength, index);
+    }
+
+    if (html === last) {
+      options.chars && options.chars(html);
+      if (!stack.length && options.warn) {
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
+      }
+      break
+    }
+  }
+
+  // Clean up any remaining tags
+  parseEndTag();
+
+  function advance (n) {
+    index += n;
+    html = html.substring(n);
+  }
+
+  function parseStartTag () {
+    var start = html.match(startTagOpen);
+    if (start) {
+      var match = {
+        tagName: start[1],
+        attrs: [],
+        start: index
+      };
+      advance(start[0].length);
+      var end, attr;
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
+        advance(attr[0].length);
+        attr.end = index;
+        match.attrs.push(attr);
+      }
+      if (end) {
+        match.unarySlash = end[1];
+        advance(end[0].length);
+        match.end = index;
+        return match
+      }
+    }
+  }
+
+  function handleStartTag (match) {
+    var tagName = match.tagName;
+    var unarySlash = match.unarySlash;
+
+    if (expectHTML) {
+      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+        parseEndTag(lastTag);
+      }
+      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+        parseEndTag(tagName);
+      }
+    }
+
+    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+    var l = match.attrs.length;
+    var attrs = new Array(l);
+    for (var i = 0; i < l; i++) {
+      var args = match.attrs[i];
+      var value = args[3] || args[4] || args[5] || '';
+      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+        ? options.shouldDecodeNewlinesForHref
+        : options.shouldDecodeNewlines;
+      attrs[i] = {
+        name: args[1],
+        value: decodeAttr(value, shouldDecodeNewlines)
+      };
+      if (options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
+    }
+
+    if (!unary) {
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+      lastTag = tagName;
+    }
+
+    if (options.start) {
+      options.start(tagName, attrs, unary, match.start, match.end);
+    }
+  }
+
+  function parseEndTag (tagName, start, end) {
+    var pos, lowerCasedTagName;
+    if (start == null) { start = index; }
+    if (end == null) { end = index; }
+
+    // Find the closest opened tag of the same type
+    if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
+      for (pos = stack.length - 1; pos >= 0; pos--) {
+        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+          break
+        }
+      }
+    } else {
+      // If no tag name is provided, clean shop
+      pos = 0;
+    }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if (i > pos || !tagName &&
+          options.warn
+        ) {
+          options.warn(
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
+          );
+        }
+        if (options.end) {
+          options.end(stack[i].tag, start, end);
+        }
+      }
+
+      // Remove the open elements from the stack
+      stack.length = pos;
+      lastTag = pos && stack[pos - 1].tag;
+    } else if (lowerCasedTagName === 'br') {
+      if (options.start) {
+        options.start(tagName, [], true, start, end);
+      }
+    } else if (lowerCasedTagName === 'p') {
+      if (options.start) {
+        options.start(tagName, [], false, start, end);
+      }
+      if (options.end) {
+        options.end(tagName, start, end);
+      }
+    }
+  }
+}
+
+/*  */
+
+var onRE = /^@|^v-on:/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
+
+var argRE = /:(.*)$/;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE$1 = /\s+/g;
+
+var invalidAttributeRE = /[\s"'<>\/=]/;
+
+var decodeHTMLCached = cached(he.decode);
+
+var emptySlotScopeToken = "_empty_";
+
+// configurable state
+var warn$2;
+var delimiters;
+var transforms;
+var preTransforms;
+var postTransforms;
+var platformIsPreTag;
+var platformMustUseProp;
+var platformGetTagNamespace;
+var maybeComponent;
+
+function createASTElement (
+  tag,
+  attrs,
+  parent
+) {
+  return {
+    type: 1,
+    tag: tag,
+    attrsList: attrs,
+    attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
+    parent: parent,
+    children: []
+  }
+}
+
+/**
+ * Convert HTML string to AST.
+ */
+function parse (
+  template,
+  options
+) {
+  warn$2 = options.warn || baseWarn;
+
+  platformIsPreTag = options.isPreTag || no;
+  platformMustUseProp = options.mustUseProp || no;
+  platformGetTagNamespace = options.getTagNamespace || no;
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+
+  transforms = pluckModuleFunction(options.modules, 'transformNode');
+  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+  delimiters = options.delimiters;
+
+  var stack = [];
+  var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
+  var root;
+  var currentParent;
+  var inVPre = false;
+  var inPre = false;
+  var warned = false;
+
+  function warnOnce (msg, range) {
+    if (!warned) {
+      warned = true;
+      warn$2(msg, range);
+    }
+  }
+
+  function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
+    // check pre state
+    if (element.pre) {
+      inVPre = false;
+    }
+    if (platformIsPreTag(element.tag)) {
+      inPre = false;
+    }
+    // apply post-transforms
+    for (var i = 0; i < postTransforms.length; i++) {
+      postTransforms[i](element, options);
+    }
+  }
+
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
+  parseHTML(template, {
+    warn: warn$2,
+    expectHTML: options.expectHTML,
+    isUnaryTag: options.isUnaryTag,
+    canBeLeftOpenTag: options.canBeLeftOpenTag,
+    shouldDecodeNewlines: options.shouldDecodeNewlines,
+    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+    shouldKeepComment: options.comments,
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
+      // check namespace.
+      // inherit parent ns if there is one
+      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+      // handle IE svg bug
+      /* istanbul ignore if */
+      if (isIE && ns === 'svg') {
+        attrs = guardIESVGBug(attrs);
+      }
+
+      var element = createASTElement(tag, attrs, currentParent);
+      if (ns) {
+        element.ns = ns;
+      }
+
+      {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$2(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
+      if (isForbiddenTag(element) && !isServerRendering()) {
+        element.forbidden = true;
+        warn$2(
+          'Templates should only be responsible for mapping the state to the ' +
+          'UI. Avoid placing tags with side-effects in your templates, such as ' +
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
+        );
+      }
+
+      // apply pre-transforms
+      for (var i = 0; i < preTransforms.length; i++) {
+        element = preTransforms[i](element, options) || element;
+      }
+
+      if (!inVPre) {
+        processPre(element);
+        if (element.pre) {
+          inVPre = true;
+        }
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = true;
+      }
+      if (inVPre) {
+        processRawAttrs(element);
+      } else if (!element.processed) {
+        // structural directives
+        processFor(element);
+        processIf(element);
+        processOnce(element);
+      }
+
+      if (!root) {
+        root = element;
+        {
+          checkRootConstraints(root);
+        }
+      }
+
+      if (!unary) {
+        currentParent = element;
+        stack.push(element);
+      } else {
+        closeElement(element);
+      }
+    },
+
+    end: function end (tag, start, end$1) {
+      var element = stack[stack.length - 1];
+      // pop stack
+      stack.length -= 1;
+      currentParent = stack[stack.length - 1];
+      if (options.outputSourceRange) {
+        element.end = end$1;
+      }
+      closeElement(element);
+    },
+
+    chars: function chars (text, start, end) {
+      if (!currentParent) {
+        {
+          if (text === template) {
+            warnOnce(
+              'Component template requires a root element, rather than just text.',
+              { start: start }
+            );
+          } else if ((text = text.trim())) {
+            warnOnce(
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
+            );
+          }
+        }
+        return
+      }
+      // IE textarea placeholder bug
+      /* istanbul ignore if */
+      if (isIE &&
+        currentParent.tag === 'textarea' &&
+        currentParent.attrsMap.placeholder === text
+      ) {
+        return
+      }
+      var children = currentParent.children;
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
+      if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE$1, ' ');
+        }
+        var res;
+        var child;
+        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+          child = {
+            type: 2,
+            expression: res.expression,
+            tokens: res.tokens,
+            text: text
+          };
+        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+          child = {
+            type: 3,
+            text: text
+          };
+        }
+        if (child) {
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
+        }
+      }
+    },
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
+    }
+  });
+  return root
+}
+
+function processPre (el) {
+  if (getAndRemoveAttr(el, 'v-pre') != null) {
+    el.pre = true;
+  }
+}
+
+function processRawAttrs (el) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
+      attrs[i] = {
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
+      };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
+    }
+  } else if (!el.pre) {
+    // non root node in pre blocks with no attributes
+    el.plain = true;
+  }
+}
+
+function processElement (
+  element,
+  options
+) {
+  processKey(element);
+
+  // determine whether this is a plain element after
+  // removing structural attributes
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
+
+  processRef(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
+  processComponent(element);
+  for (var i = 0; i < transforms.length; i++) {
+    element = transforms[i](element, options) || element;
+  }
+  processAttrs(element);
+  return element
+}
+
+function processKey (el) {
+  var exp = getBindingAttr(el, 'key');
+  if (exp) {
+    {
+      if (el.tag === 'template') {
+        warn$2(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$2(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
+    }
+    el.key = exp;
+  }
+}
+
+function processRef (el) {
+  var ref = getBindingAttr(el, 'ref');
+  if (ref) {
+    el.ref = ref;
+    el.refInFor = checkInFor(el);
+  }
+}
+
+function processFor (el) {
+  var exp;
+  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+    var res = parseFor(exp);
+    if (res) {
+      extend(el, res);
+    } else {
+      warn$2(
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+}
+
+
+
+function parseFor (exp) {
+  var inMatch = exp.match(forAliasRE);
+  if (!inMatch) { return }
+  var res = {};
+  res.for = inMatch[2].trim();
+  var alias = inMatch[1].trim().replace(stripParensRE, '');
+  var iteratorMatch = alias.match(forIteratorRE);
+  if (iteratorMatch) {
+    res.alias = alias.replace(forIteratorRE, '').trim();
+    res.iterator1 = iteratorMatch[1].trim();
+    if (iteratorMatch[2]) {
+      res.iterator2 = iteratorMatch[2].trim();
+    }
+  } else {
+    res.alias = alias;
+  }
+  return res
+}
+
+function processIf (el) {
+  var exp = getAndRemoveAttr(el, 'v-if');
+  if (exp) {
+    el.if = exp;
+    addIfCondition(el, {
+      exp: exp,
+      block: el
+    });
+  } else {
+    if (getAndRemoveAttr(el, 'v-else') != null) {
+      el.else = true;
+    }
+    var elseif = getAndRemoveAttr(el, 'v-else-if');
+    if (elseif) {
+      el.elseif = elseif;
+    }
+  }
+}
+
+function processIfConditions (el, parent) {
+  var prev = findPrevElement(parent.children);
+  if (prev && prev.if) {
+    addIfCondition(prev, {
+      exp: el.elseif,
+      block: el
+    });
+  } else {
+    warn$2(
+      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+    );
+  }
+}
+
+function findPrevElement (children) {
+  var i = children.length;
+  while (i--) {
+    if (children[i].type === 1) {
+      return children[i]
+    } else {
+      if (children[i].text !== ' ') {
+        warn$2(
+          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+          "will be ignored.",
+          children[i]
+        );
+      }
+      children.pop();
+    }
+  }
+}
+
+function addIfCondition (el, condition) {
+  if (!el.ifConditions) {
+    el.ifConditions = [];
+  }
+  el.ifConditions.push(condition);
+}
+
+function processOnce (el) {
+  var once$$1 = getAndRemoveAttr(el, 'v-once');
+  if (once$$1 != null) {
+    el.once = true;
+  }
+}
+
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (slotScope) {
+      warn$2(
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (el.attrsMap['v-for']) {
+      warn$2(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
+    if (el.tag === 'template') {
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        {
+          if (el.slotTarget || el.slotScope) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$2(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+      }
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        {
+          if (!maybeComponent(el)) {
+            warn$2(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$2(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
+      }
+    }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else {
+      warn$2(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if (el.key) {
+      warn$2(
+        "`key` does not work on <slot> because slots are abstract outlets " +
+        "and can possibly expand into multiple elements. " +
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
+      );
+    }
+  }
+}
+
+function processComponent (el) {
+  var binding;
+  if ((binding = getBindingAttr(el, 'is'))) {
+    el.component = binding;
+  }
+  if (getAndRemoveAttr(el, 'inline-template') != null) {
+    el.inlineTemplate = true;
+  }
+}
+
+function processAttrs (el) {
+  var list = el.attrsList;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+  for (i = 0, l = list.length; i < l; i++) {
+    name = rawName = list[i].name;
+    value = list[i].value;
+    if (dirRE.test(name)) {
+      // mark element as dynamic
+      el.hasBindings = true;
+      // modifiers
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
+      if (modifiers) {
+        name = name.replace(modifierRE, '');
+      }
+      if (bindRE.test(name)) { // v-bind
+        name = name.replace(bindRE, '');
+        value = parseFilters(value);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          value.trim().length === 0
+        ) {
+          warn$2(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
+        if (modifiers) {
+          if (modifiers.prop && !isDynamic) {
+            name = camelize(name);
+            if (name === 'innerHtml') { name = 'innerHTML'; }
+          }
+          if (modifiers.camel && !isDynamic) {
+            name = camelize(name);
+          }
+          if (modifiers.sync) {
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i],
+                true // dynamic
+              );
+            }
+          }
+        }
+        if ((modifiers && modifiers.prop) || (
+          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+        )) {
+          addProp(el, name, value, list[i], isDynamic);
+        } else {
+          addAttr(el, name, value, list[i], isDynamic);
+        }
+      } else if (onRE.test(name)) { // v-on
+        name = name.replace(onRE, '');
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
+      } else { // normal directives
+        name = name.replace(dirRE, '');
+        // parse arg
+        var argMatch = name.match(argRE);
+        var arg = argMatch && argMatch[1];
+        isDynamic = false;
+        if (arg) {
+          name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
+        }
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+        if (name === 'model') {
+          checkForAliasModel(el, value);
+        }
+      }
+    } else {
+      // literal attribute
+      {
+        var res = parseText(value, delimiters);
+        if (res) {
+          warn$2(
+            name + "=\"" + value + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
+          );
+        }
+      }
+      addAttr(el, name, JSON.stringify(value), list[i]);
+      // #6887 firefox doesn't update muted state if set via attribute
+      // even immediately after element creation
+      if (!el.component &&
+          name === 'muted' &&
+          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+        addProp(el, name, 'true', list[i]);
+      }
+    }
+  }
+}
+
+function checkInFor (el) {
+  var parent = el;
+  while (parent) {
+    if (parent.for !== undefined) {
+      return true
+    }
+    parent = parent.parent;
+  }
+  return false
+}
+
+function parseModifiers (name) {
+  var match = name.match(modifierRE);
+  if (match) {
+    var ret = {};
+    match.forEach(function (m) { ret[m.slice(1)] = true; });
+    return ret
+  }
+}
+
+function makeAttrsMap (attrs) {
+  var map = {};
+  for (var i = 0, l = attrs.length; i < l; i++) {
+    if (
+      map[attrs[i].name] && !isIE && !isEdge
+    ) {
+      warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
+    }
+    map[attrs[i].name] = attrs[i].value;
+  }
+  return map
+}
+
+// for script (e.g. type="x/template") or style, do not decode content
+function isTextTag (el) {
+  return el.tag === 'script' || el.tag === 'style'
+}
+
+function isForbiddenTag (el) {
+  return (
+    el.tag === 'style' ||
+    (el.tag === 'script' && (
+      !el.attrsMap.type ||
+      el.attrsMap.type === 'text/javascript'
+    ))
+  )
+}
+
+var ieNSBug = /^xmlns:NS\d+/;
+var ieNSPrefix = /^NS\d+:/;
+
+/* istanbul ignore next */
+function guardIESVGBug (attrs) {
+  var res = [];
+  for (var i = 0; i < attrs.length; i++) {
+    var attr = attrs[i];
+    if (!ieNSBug.test(attr.name)) {
+      attr.name = attr.name.replace(ieNSPrefix, '');
+      res.push(attr);
+    }
+  }
+  return res
+}
+
+function checkForAliasModel (el, value) {
+  var _el = el;
+  while (_el) {
+    if (_el.for && _el.alias === value) {
+      warn$2(
+        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+        "You are binding v-model directly to a v-for iteration alias. " +
+        "This will not be able to modify the v-for source array because " +
+        "writing to the alias is like modifying a function local variable. " +
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
+      );
+    }
+    _el = _el.parent;
+  }
+}
+
+/*  */
+
+function preTransformNode (el, options) {
+  if (el.tag === 'input') {
+    var map = el.attrsMap;
+    if (!map['v-model']) {
+      return
+    }
+
+    var typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = "(" + (map['v-bind']) + ").type";
+    }
+
+    if (typeBinding) {
+      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+      // 1. checkbox
+      var branch0 = cloneASTElement(el);
+      // process for on the main node
+      processFor(branch0);
+      addRawAttr(branch0, 'type', 'checkbox');
+      processElement(branch0, options);
+      branch0.processed = true; // prevent it from double-processed
+      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+      addIfCondition(branch0, {
+        exp: branch0.if,
+        block: branch0
+      });
+      // 2. add radio else-if condition
+      var branch1 = cloneASTElement(el);
+      getAndRemoveAttr(branch1, 'v-for', true);
+      addRawAttr(branch1, 'type', 'radio');
+      processElement(branch1, options);
+      addIfCondition(branch0, {
+        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+        block: branch1
+      });
+      // 3. other
+      var branch2 = cloneASTElement(el);
+      getAndRemoveAttr(branch2, 'v-for', true);
+      addRawAttr(branch2, ':type', typeBinding);
+      processElement(branch2, options);
+      addIfCondition(branch0, {
+        exp: ifCondition,
+        block: branch2
+      });
+
+      if (hasElse) {
+        branch0.else = true;
+      } else if (elseIfCondition) {
+        branch0.elseif = elseIfCondition;
+      }
+
+      return branch0
+    }
+  }
+}
+
+function cloneASTElement (el) {
+  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+}
+
+var model$1 = {
+  preTransformNode: preTransformNode
+};
+
+var modules$1 = [
+  klass$1,
+  style$1,
+  model$1
+];
+
+/*  */
+
+function text (el, dir) {
+  if (dir.value) {
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
+  }
+}
+
+/*  */
+
+function html (el, dir) {
+  if (dir.value) {
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
+  }
+}
+
+var directives$1 = {
+  model: model,
+  text: text,
+  html: html
+};
+
+/*  */
+
+var baseOptions = {
+  expectHTML: true,
+  modules: modules$1,
+  directives: directives$1,
+  isPreTag: isPreTag,
+  isUnaryTag: isUnaryTag,
+  mustUseProp: mustUseProp,
+  canBeLeftOpenTag: canBeLeftOpenTag,
+  isReservedTag: isReservedTag,
+  getTagNamespace: getTagNamespace,
+  staticKeys: genStaticKeys(modules$1)
+};
+
+/*  */
+
+var isStaticKey;
+var isPlatformReservedTag;
+
+var genStaticKeysCached = cached(genStaticKeys$1);
+
+/**
+ * Goal of the optimizer: walk the generated template AST tree
+ * and detect sub-trees that are purely static, i.e. parts of
+ * the DOM that never needs to change.
+ *
+ * Once we detect these sub-trees, we can:
+ *
+ * 1. Hoist them into constants, so that we no longer need to
+ *    create fresh nodes for them on each re-render;
+ * 2. Completely skip them in the patching process.
+ */
+function optimize (root, options) {
+  if (!root) { return }
+  isStaticKey = genStaticKeysCached(options.staticKeys || '');
+  isPlatformReservedTag = options.isReservedTag || no;
+  // first pass: mark all non-static nodes.
+  markStatic$1(root);
+  // second pass: mark static roots.
+  markStaticRoots(root, false);
+}
+
+function genStaticKeys$1 (keys) {
+  return makeMap(
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
+    (keys ? ',' + keys : '')
+  )
+}
+
+function markStatic$1 (node) {
+  node.static = isStatic(node);
+  if (node.type === 1) {
+    // do not make component slot content static. this avoids
+    // 1. components not able to mutate slot nodes
+    // 2. static slot content fails for hot-reloading
+    if (
+      !isPlatformReservedTag(node.tag) &&
+      node.tag !== 'slot' &&
+      node.attrsMap['inline-template'] == null
+    ) {
+      return
+    }
+    for (var i = 0, l = node.children.length; i < l; i++) {
+      var child = node.children[i];
+      markStatic$1(child);
+      if (!child.static) {
+        node.static = false;
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        var block = node.ifConditions[i$1].block;
+        markStatic$1(block);
+        if (!block.static) {
+          node.static = false;
+        }
+      }
+    }
+  }
+}
+
+function markStaticRoots (node, isInFor) {
+  if (node.type === 1) {
+    if (node.static || node.once) {
+      node.staticInFor = isInFor;
+    }
+    // For a node to qualify as a static root, it should have children that
+    // are not just static text. Otherwise the cost of hoisting out will
+    // outweigh the benefits and it's better off to just always render it fresh.
+    if (node.static && node.children.length && !(
+      node.children.length === 1 &&
+      node.children[0].type === 3
+    )) {
+      node.staticRoot = true;
+      return
+    } else {
+      node.staticRoot = false;
+    }
+    if (node.children) {
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        markStaticRoots(node.children[i], isInFor || !!node.for);
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        markStaticRoots(node.ifConditions[i$1].block, isInFor);
+      }
+    }
+  }
+}
+
+function isStatic (node) {
+  if (node.type === 2) { // expression
+    return false
+  }
+  if (node.type === 3) { // text
+    return true
+  }
+  return !!(node.pre || (
+    !node.hasBindings && // no dynamic bindings
+    !node.if && !node.for && // not v-if or v-for or v-else
+    !isBuiltInTag(node.tag) && // not a built-in
+    isPlatformReservedTag(node.tag) && // not a component
+    !isDirectChildOfTemplateFor(node) &&
+    Object.keys(node).every(isStaticKey)
+  ))
+}
+
+function isDirectChildOfTemplateFor (node) {
+  while (node.parent) {
+    node = node.parent;
+    if (node.tag !== 'template') {
+      return false
+    }
+    if (node.for) {
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+// KeyboardEvent.keyCode aliases
+var keyCodes = {
+  esc: 27,
+  tab: 9,
+  enter: 13,
+  space: 32,
+  up: 38,
+  left: 37,
+  right: 39,
+  down: 40,
+  'delete': [8, 46]
+};
+
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
+// #4868: modifiers that prevent the execution of the listener
+// need to explicitly return null so that we can determine whether to remove
+// the listener for .once
+var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+var modifierCode = {
+  stop: '$event.stopPropagation();',
+  prevent: '$event.preventDefault();',
+  self: genGuard("$event.target !== $event.currentTarget"),
+  ctrl: genGuard("!$event.ctrlKey"),
+  shift: genGuard("!$event.shiftKey"),
+  alt: genGuard("!$event.altKey"),
+  meta: genGuard("!$event.metaKey"),
+  left: genGuard("'button' in $event && $event.button !== 0"),
+  middle: genGuard("'button' in $event && $event.button !== 1"),
+  right: genGuard("'button' in $event && $event.button !== 2")
+};
+
+function genHandlers (
+  events,
+  isNative
+) {
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
+  for (var name in events) {
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
+  }
+}
+
+function genHandler (handler) {
+  if (!handler) {
+    return 'function(){}'
+  }
+
+  if (Array.isArray(handler)) {
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+  }
+
+  var isMethodPath = simplePathRE.test(handler.value);
+  var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+  if (!handler.modifiers) {
+    if (isMethodPath || isFunctionExpression) {
+      return handler.value
+    }
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+  } else {
+    var code = '';
+    var genModifierCode = '';
+    var keys = [];
+    for (var key in handler.modifiers) {
+      if (modifierCode[key]) {
+        genModifierCode += modifierCode[key];
+        // left/right
+        if (keyCodes[key]) {
+          keys.push(key);
+        }
+      } else if (key === 'exact') {
+        var modifiers = (handler.modifiers);
+        genModifierCode += genGuard(
+          ['ctrl', 'shift', 'alt', 'meta']
+            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+            .join('||')
+        );
+      } else {
+        keys.push(key);
+      }
+    }
+    if (keys.length) {
+      code += genKeyFilter(keys);
+    }
+    // Make sure modifiers like prevent and stop get executed after key filtering
+    if (genModifierCode) {
+      code += genModifierCode;
+    }
+    var handlerCode = isMethodPath
+      ? ("return " + (handler.value) + "($event)")
+      : isFunctionExpression
+        ? ("return (" + (handler.value) + ")($event)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
+    return ("function($event){" + code + handlerCode + "}")
+  }
+}
+
+function genKeyFilter (keys) {
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
+}
+
+function genFilterCode (key) {
+  var keyVal = parseInt(key, 10);
+  if (keyVal) {
+    return ("$event.keyCode!==" + keyVal)
+  }
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
+  return (
+    "_k($event.keyCode," +
+    (JSON.stringify(key)) + "," +
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
+  )
+}
+
+/*  */
+
+function on (el, dir) {
+  if (dir.modifiers) {
+    warn("v-on without argument does not support modifiers.");
+  }
+  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+}
+
+/*  */
+
+function bind$1 (el, dir) {
+  el.wrapData = function (code) {
+    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+  };
+}
+
+/*  */
+
+var baseDirectives = {
+  on: on,
+  bind: bind$1,
+  cloak: noop
+};
+
+/*  */
+
+
+
+
+
+var CodegenState = function CodegenState (options) {
+  this.options = options;
+  this.warn = options.warn || baseWarn;
+  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+  this.directives = extend(extend({}, baseDirectives), options.directives);
+  var isReservedTag = options.isReservedTag || no;
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+  this.onceId = 0;
+  this.staticRenderFns = [];
+  this.pre = false;
+};
+
+
+
+function generate (
+  ast,
+  options
+) {
+  var state = new CodegenState(options);
+  var code = ast ? genElement(ast, state) : '_c("div")';
+  return {
+    render: ("with(this){return " + code + "}"),
+    staticRenderFns: state.staticRenderFns
+  }
+}
+
+function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
+  if (el.staticRoot && !el.staticProcessed) {
+    return genStatic(el, state)
+  } else if (el.once && !el.onceProcessed) {
+    return genOnce(el, state)
+  } else if (el.for && !el.forProcessed) {
+    return genFor(el, state)
+  } else if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+    return genChildren(el, state) || 'void 0'
+  } else if (el.tag === 'slot') {
+    return genSlot(el, state)
+  } else {
+    // component or element
+    var code;
+    if (el.component) {
+      code = genComponent(el.component, el, state);
+    } else {
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
+
+      var children = el.inlineTemplate ? null : genChildren(el, state, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+    }
+    // module transforms
+    for (var i = 0; i < state.transforms.length; i++) {
+      code = state.transforms[i](el, code);
+    }
+    return code
+  }
+}
+
+// hoist static sub-trees out
+function genStatic (el, state) {
+  el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
+  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
+  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+}
+
+// v-once
+function genOnce (el, state) {
+  el.onceProcessed = true;
+  if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.staticInFor) {
+    var key = '';
+    var parent = el.parent;
+    while (parent) {
+      if (parent.for) {
+        key = parent.key;
+        break
+      }
+      parent = parent.parent;
+    }
+    if (!key) {
+      state.warn(
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
+      );
+      return genElement(el, state)
+    }
+    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+  } else {
+    return genStatic(el, state)
+  }
+}
+
+function genIf (
+  el,
+  state,
+  altGen,
+  altEmpty
+) {
+  el.ifProcessed = true; // avoid recursion
+  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+}
+
+function genIfConditions (
+  conditions,
+  state,
+  altGen,
+  altEmpty
+) {
+  if (!conditions.length) {
+    return altEmpty || '_e()'
+  }
+
+  var condition = conditions.shift();
+  if (condition.exp) {
+    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+  } else {
+    return ("" + (genTernaryExp(condition.block)))
+  }
+
+  // v-if with v-once should generate code like (a)?_m(0):_m(1)
+  function genTernaryExp (el) {
+    return altGen
+      ? altGen(el, state)
+      : el.once
+        ? genOnce(el, state)
+        : genElement(el, state)
+  }
+}
+
+function genFor (
+  el,
+  state,
+  altGen,
+  altHelper
+) {
+  var exp = el.for;
+  var alias = el.alias;
+  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+  if (state.maybeComponent(el) &&
+    el.tag !== 'slot' &&
+    el.tag !== 'template' &&
+    !el.key
+  ) {
+    state.warn(
+      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+      "v-for should have explicit keys. " +
+      "See https://vuejs.org/guide/list.html#key for more info.",
+      el.rawAttrsMap['v-for'],
+      true /* tip */
+    );
+  }
+
+  el.forProcessed = true; // avoid recursion
+  return (altHelper || '_l') + "((" + exp + ")," +
+    "function(" + alias + iterator1 + iterator2 + "){" +
+      "return " + ((altGen || genElement)(el, state)) +
+    '})'
+}
+
+function genData$2 (el, state) {
+  var data = '{';
+
+  // directives first.
+  // directives may mutate the el's other properties before they are generated.
+  var dirs = genDirectives(el, state);
+  if (dirs) { data += dirs + ','; }
+
+  // key
+  if (el.key) {
+    data += "key:" + (el.key) + ",";
+  }
+  // ref
+  if (el.ref) {
+    data += "ref:" + (el.ref) + ",";
+  }
+  if (el.refInFor) {
+    data += "refInFor:true,";
+  }
+  // pre
+  if (el.pre) {
+    data += "pre:true,";
+  }
+  // record original tag name for components using "is" attribute
+  if (el.component) {
+    data += "tag:\"" + (el.tag) + "\",";
+  }
+  // module data generation functions
+  for (var i = 0; i < state.dataGenFns.length; i++) {
+    data += state.dataGenFns[i](el);
+  }
+  // attributes
+  if (el.attrs) {
+    data += "attrs:" + (genProps(el.attrs)) + ",";
+  }
+  // DOM props
+  if (el.props) {
+    data += "domProps:" + (genProps(el.props)) + ",";
+  }
+  // event handlers
+  if (el.events) {
+    data += (genHandlers(el.events, false)) + ",";
+  }
+  if (el.nativeEvents) {
+    data += (genHandlers(el.nativeEvents, true)) + ",";
+  }
+  // slot target
+  // only for non-scoped slots
+  if (el.slotTarget && !el.slotScope) {
+    data += "slot:" + (el.slotTarget) + ",";
+  }
+  // scoped slots
+  if (el.scopedSlots) {
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+  }
+  // component v-model
+  if (el.model) {
+    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+  }
+  // inline-template
+  if (el.inlineTemplate) {
+    var inlineTemplate = genInlineTemplate(el, state);
+    if (inlineTemplate) {
+      data += inlineTemplate + ",";
+    }
+  }
+  data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
+  // v-bind data wrap
+  if (el.wrapData) {
+    data = el.wrapData(data);
+  }
+  // v-on data wrap
+  if (el.wrapListeners) {
+    data = el.wrapListeners(data);
+  }
+  return data
+}
+
+function genDirectives (el, state) {
+  var dirs = el.directives;
+  if (!dirs) { return }
+  var res = 'directives:[';
+  var hasRuntime = false;
+  var i, l, dir, needRuntime;
+  for (i = 0, l = dirs.length; i < l; i++) {
+    dir = dirs[i];
+    needRuntime = true;
+    var gen = state.directives[dir.name];
+    if (gen) {
+      // compile-time directive that manipulates AST.
+      // returns true if it also needs a runtime counterpart.
+      needRuntime = !!gen(el, dir, state.warn);
+    }
+    if (needRuntime) {
+      hasRuntime = true;
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+    }
+  }
+  if (hasRuntime) {
+    return res.slice(0, -1) + ']'
+  }
+}
+
+function genInlineTemplate (el, state) {
+  var ast = el.children[0];
+  if (el.children.length !== 1 || ast.type !== 1) {
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
+  }
+  if (ast && ast.type === 1) {
+    var inlineRenderFns = generate(ast, state.options);
+    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+  }
+}
+
+function genScopedSlots (
+  el,
+  slots,
+  state
+) {
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
+}
+
+function genScopedSlot (
+  el,
+  state
+) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
+  if (el.for && !el.forProcessed) {
+    return genFor(el, state, genScopedSlot)
+  }
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
+    "return " + (el.tag === 'template'
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+        : genChildren(el, state) || 'undefined'
+      : genElement(el, state)) + "}";
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+}
+
+function genChildren (
+  el,
+  state,
+  checkSkip,
+  altGenElement,
+  altGenNode
+) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+      el$1.for &&
+      el$1.tag !== 'template' &&
+      el$1.tag !== 'slot'
+    ) {
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
+    }
+    var normalizationType$1 = checkSkip
+      ? getNormalizationType(children, state.maybeComponent)
+      : 0;
+    var gen = altGenNode || genNode;
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
+  }
+}
+
+// determine the normalization needed for the children array.
+// 0: no normalization needed
+// 1: simple normalization needed (possible 1-level deep nested array)
+// 2: full normalization needed
+function getNormalizationType (
+  children,
+  maybeComponent
+) {
+  var res = 0;
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.type !== 1) {
+      continue
+    }
+    if (needsNormalization(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+      res = 2;
+      break
+    }
+    if (maybeComponent(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+      res = 1;
+    }
+  }
+  return res
+}
+
+function needsNormalization (el) {
+  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+}
+
+function genNode (node, state) {
+  if (node.type === 1) {
+    return genElement(node, state)
+  } else if (node.type === 3 && node.isComment) {
+    return genComment(node)
+  } else {
+    return genText(node)
+  }
+}
+
+function genText (text) {
+  return ("_v(" + (text.type === 2
+    ? text.expression // no need for () because already wrapped in _s()
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+}
+
+function genComment (comment) {
+  return ("_e(" + (JSON.stringify(comment.text)) + ")")
+}
+
+function genSlot (el, state) {
+  var slotName = el.slotName || '"default"';
+  var children = genChildren(el, state);
+  var res = "_t(" + slotName + (children ? ("," + children) : '');
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
+  var bind$$1 = el.attrsMap['v-bind'];
+  if ((attrs || bind$$1) && !children) {
+    res += ",null";
+  }
+  if (attrs) {
+    res += "," + attrs;
+  }
+  if (bind$$1) {
+    res += (attrs ? '' : ',null') + "," + bind$$1;
+  }
+  return res + ')'
+}
+
+// componentName is el.component, take it as argument to shun flow's pessimistic refinement
+function genComponent (
+  componentName,
+  el,
+  state
+) {
+  var children = el.inlineTemplate ? null : genChildren(el, state, true);
+  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+}
+
+function genProps (props) {
+  var staticProps = "";
+  var dynamicProps = "";
+  for (var i = 0; i < props.length; i++) {
+    var prop = props[i];
+    var value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
+    }
+  }
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
+}
+
+// #3895, #4268
+function transformSpecialNewlines (text) {
+  return text
+    .replace(/\u2028/g, '\\u2028')
+    .replace(/\u2029/g, '\\u2029')
+}
+
+/*  */
+
+
+
+// these keywords should not appear inside expressions, but operators like
+// typeof, instanceof and in are allowed
+var prohibitedKeywordRE = new RegExp('\\b' + (
+  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+  'super,throw,while,yield,delete,export,import,return,switch,default,' +
+  'extends,finally,continue,debugger,function,arguments'
+).split(',').join('\\b|\\b') + '\\b');
+
+// these unary operators should not be used as property/method names
+var unaryOperatorsRE = new RegExp('\\b' + (
+  'delete,typeof,void'
+).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+// strip strings in expressions
+var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+// detect problematic expressions in a template
+function detectErrors (ast, warn) {
+  if (ast) {
+    checkNode(ast, warn);
+  }
+}
+
+function checkNode (node, warn) {
+  if (node.type === 1) {
+    for (var name in node.attrsMap) {
+      if (dirRE.test(name)) {
+        var value = node.attrsMap[name];
+        if (value) {
+          var range = node.rawAttrsMap[name];
+          if (name === 'v-for') {
+            checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+          } else if (onRE.test(name)) {
+            checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+          } else {
+            checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+          }
+        }
+      }
+    }
+    if (node.children) {
+      for (var i = 0; i < node.children.length; i++) {
+        checkNode(node.children[i], warn);
+      }
+    }
+  } else if (node.type === 2) {
+    checkExpression(node.expression, node.text, warn, node);
+  }
+}
+
+function checkEvent (exp, text, warn, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
+      "avoid using JavaScript unary operator as property name: " +
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
+    );
+  }
+  checkExpression(exp, text, warn, range);
+}
+
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
+}
+
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  warn,
+  range
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident + "=_"));
+    } catch (e) {
+      warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+    }
+  }
+}
+
+function checkExpression (exp, text, warn, range) {
+  try {
+    new Function(("return " + exp));
+  } catch (e) {
+    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+    if (keywordMatch) {
+      warn(
+        "avoid using JavaScript keyword as property name: " +
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
+      );
+    } else {
+      warn(
+        "invalid expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
+      );
+    }
+  }
+}
+
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
+/*  */
+
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
+/*  */
+
+
+
+function createFunction (code, errors) {
+  try {
+    return new Function(code)
+  } catch (err) {
+    errors.push({ err: err, code: code });
+    return noop
+  }
+}
+
+function createCompileToFunctionFn (compile) {
+  var cache = Object.create(null);
+
+  return function compileToFunctions (
+    template,
+    options,
+    vm
+  ) {
+    options = extend({}, options);
+    var warn$$1 = options.warn || warn;
+    delete options.warn;
+
+    /* istanbul ignore if */
+    {
+      // detect possible CSP restriction
+      try {
+        new Function('return 1');
+      } catch (e) {
+        if (e.toString().match(/unsafe-eval|CSP/)) {
+          warn$$1(
+            'It seems you are using the standalone build of Vue.js in an ' +
+            'environment with Content Security Policy that prohibits unsafe-eval. ' +
+            'The template compiler cannot work in this environment. Consider ' +
+            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+            'templates into render functions.'
+          );
+        }
+      }
+    }
+
+    // check cache
+    var key = options.delimiters
+      ? String(options.delimiters) + template
+      : template;
+    if (cache[key]) {
+      return cache[key]
+    }
+
+    // compile
+    var compiled = compile(template, options);
+
+    // check compilation errors/tips
+    {
+      if (compiled.errors && compiled.errors.length) {
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
+      }
+      if (compiled.tips && compiled.tips.length) {
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
+      }
+    }
+
+    // turn code into functions
+    var res = {};
+    var fnGenErrors = [];
+    res.render = createFunction(compiled.render, fnGenErrors);
+    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+      return createFunction(code, fnGenErrors)
+    });
+
+    // check function generation errors.
+    // this should only happen if there is a bug in the compiler itself.
+    // mostly for codegen development use
+    /* istanbul ignore if */
+    {
+      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+        warn$$1(
+          "Failed to generate render function:\n\n" +
+          fnGenErrors.map(function (ref) {
+            var err = ref.err;
+            var code = ref.code;
+
+            return ((err.toString()) + " in\n\n" + code + "\n");
+        }).join('\n'),
+          vm
+        );
+      }
+    }
+
+    return (cache[key] = res)
+  }
+}
+
+/*  */
+
+function createCompilerCreator (baseCompile) {
+  return function createCompiler (baseOptions) {
+    function compile (
+      template,
+      options
+    ) {
+      var finalOptions = Object.create(baseOptions);
+      var errors = [];
+      var tips = [];
+
+      var warn = function (msg, range, tip) {
+        (tip ? tips : errors).push(msg);
+      };
+
+      if (options) {
+        if (options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
+        // merge custom modules
+        if (options.modules) {
+          finalOptions.modules =
+            (baseOptions.modules || []).concat(options.modules);
+        }
+        // merge custom directives
+        if (options.directives) {
+          finalOptions.directives = extend(
+            Object.create(baseOptions.directives || null),
+            options.directives
+          );
+        }
+        // copy other options
+        for (var key in options) {
+          if (key !== 'modules' && key !== 'directives') {
+            finalOptions[key] = options[key];
+          }
+        }
+      }
+
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
+      {
+        detectErrors(compiled.ast, warn);
+      }
+      compiled.errors = errors;
+      compiled.tips = tips;
+      return compiled
+    }
+
+    return {
+      compile: compile,
+      compileToFunctions: createCompileToFunctionFn(compile)
+    }
+  }
+}
+
+/*  */
+
+// `createCompilerCreator` allows creating compilers that use alternative
+// parser/optimizer/codegen, e.g the SSR optimizing compiler.
+// Here we just export a default compiler using the default parts.
+var createCompiler = createCompilerCreator(function baseCompile (
+  template,
+  options
+) {
+  var ast = parse(template.trim(), options);
+  if (options.optimize !== false) {
+    optimize(ast, options);
+  }
+  var code = generate(ast, options);
+  return {
+    ast: ast,
+    render: code.render,
+    staticRenderFns: code.staticRenderFns
+  }
+});
+
+/*  */
+
+var ref$1 = createCompiler(baseOptions);
+var compile = ref$1.compile;
+var compileToFunctions = ref$1.compileToFunctions;
+
+/*  */
+
+// check whether current browser encodes a char inside attribute values
+var div;
+function getShouldDecode (href) {
+  div = div || document.createElement('div');
+  div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
+  return div.innerHTML.indexOf('&#10;') > 0
+}
+
+// #3663: IE encodes newlines inside attribute values while other browsers don't
+var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
+// #6828: chrome encodes content in a[href]
+var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+
+/*  */
+
+var idToTemplate = cached(function (id) {
+  var el = query(id);
+  return el && el.innerHTML
+});
+
+var mount = Vue.prototype.$mount;
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && query(el);
+
+  /* istanbul ignore if */
+  if (el === document.body || el === document.documentElement) {
+    warn(
+      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
+    );
+    return this
+  }
+
+  var options = this.$options;
+  // resolve template/el and convert to render function
+  if (!options.render) {
+    var template = options.template;
+    if (template) {
+      if (typeof template === 'string') {
+        if (template.charAt(0) === '#') {
+          template = idToTemplate(template);
+          /* istanbul ignore if */
+          if (!template) {
+            warn(
+              ("Template element not found or is empty: " + (options.template)),
+              this
+            );
+          }
+        }
+      } else if (template.nodeType) {
+        template = template.innerHTML;
+      } else {
+        {
+          warn('invalid template option:' + template, this);
+        }
+        return this
+      }
+    } else if (el) {
+      template = getOuterHTML(el);
+    }
+    if (template) {
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        mark('compile');
+      }
+
+      var ref = compileToFunctions(template, {
+        outputSourceRange: "development" !== 'production',
+        shouldDecodeNewlines: shouldDecodeNewlines,
+        shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
+        delimiters: options.delimiters,
+        comments: options.comments
+      }, this);
+      var render = ref.render;
+      var staticRenderFns = ref.staticRenderFns;
+      options.render = render;
+      options.staticRenderFns = staticRenderFns;
+
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        mark('compile end');
+        measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+      }
+    }
+  }
+  return mount.call(this, el, hydrating)
+};
+
+/**
+ * Get outerHTML of elements, taking care
+ * of SVG elements in IE as well.
+ */
+function getOuterHTML (el) {
+  if (el.outerHTML) {
+    return el.outerHTML
+  } else {
+    var container = document.createElement('div');
+    container.appendChild(el.cloneNode(true));
+    return container.innerHTML
+  }
+}
+
+Vue.compile = compileToFunctions;
+
+module.exports = Vue;

web/assets/[email protected]/vue.common.js

@@ -0,0 +1,5 @@
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./vue.common.prod.js')
+} else {
+  module.exports = require('./vue.common.dev.js')
+}

web/assets/[email protected]/vue.esm.js

@@ -0,0 +1,11993 @@
+/*!
+ * Vue.js v2.6.12
+ * (c) 2014-2020 Evan You
+ * Released under the MIT License.
+ */
+/*  */
+
+var emptyObject = Object.freeze({});
+
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive.
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value, e.g., [object Object].
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert an input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if an attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array.
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
+    }
+  }
+}
+
+/**
+ * Check whether an object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
+ */
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
+    }
+  }
+  return res
+}
+
+/* eslint-disable no-unused-vars */
+
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+ */
+function noop (a, b, c) {}
+
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
+
+/* eslint-enable no-unused-vars */
+
+/**
+ * Return the same value.
+ */
+var identity = function (_) { return _; };
+
+/**
+ * Generate a string containing static keys from compiler modules.
+ */
+function genStaticKeys (modules) {
+  return modules.reduce(function (keys, m) {
+    return keys.concat(m.staticKeys || [])
+  }, []).join(',')
+}
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured',
+  'serverPrefetch'
+];
+
+/*  */
+
+
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: process.env.NODE_ENV !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: process.env.NODE_ENV !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+if (process.env.NODE_ENV !== 'production') {
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm;
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
+    }
+
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
+
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
+
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode) {
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    vnode.componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
+  cloned.isCloned = true;
+  return cloned
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
+ */
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
+
+/**
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatch updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through all properties and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive$$1(obj, keys[i]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment a target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment a target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    shouldObserve &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive$$1 (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if (process.env.NODE_ENV !== 'production' && customSetter) {
+        customSetter();
+      }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive$$1(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+if (process.env.NODE_ENV !== 'production') {
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      process.env.NODE_ENV !== 'production' && warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  var res = childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    process.env.NODE_ENV !== 'production' && assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  if (process.env.NODE_ENV !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && process.env.NODE_ENV !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else if (process.env.NODE_ENV !== 'production') {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else if (process.env.NODE_ENV !== 'production') {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else if (process.env.NODE_ENV !== 'production') {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  if (process.env.NODE_ENV !== 'production') {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
+    }
+  }
+
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
+    observe(value);
+    toggleObserving(prevShouldObserve);
+  }
+  if (
+    process.env.NODE_ENV !== 'production' &&
+    // skip validation for weex recycle-list child component props
+    !(false)
+  ) {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if (process.env.NODE_ENV !== 'production' && isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i]);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+
+  if (!valid) {
+    warn(
+      getInvalidTypeMessage(name, value, expectedTypes),
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+
+function assertType (value, type) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    valid = value instanceof type;
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  return match ? match[1] : ''
+}
+
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
+  }
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
+    }
+  }
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  var expectedValue = styleValue(value, expectedType);
+  var receivedValue = styleValue(value, receivedType);
+  // check if we need to specify expected value
+  if (expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      !isBoolean(expectedType, receivedType)) {
+    message += " with value " + expectedValue;
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + receivedValue + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+function isExplicable (value) {
+  var explicitTypes = ['string', 'number', 'boolean'];
+  return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
+          }
+        }
+      }
+    }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
+  }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  if (process.env.NODE_ENV !== 'production') {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+
+var isUsingMicroTask = false;
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  timerFunc = function () {
+    p.then(flushCallbacks);
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else {
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    timerFunc();
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+var mark;
+var measure;
+
+if (process.env.NODE_ENV !== 'production') {
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      // perf.clearMeasures(name)
+    };
+  }
+}
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+if (process.env.NODE_ENV !== 'production') {
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' && isNative(Proxy);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+      if (!has && !isAllowed) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns, vm) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+      }
+    } else {
+      // return handler return value for single handlers
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  createOnceHandler,
+  vm
+) {
+  var name, def$$1, cur, old, event;
+  for (name in on) {
+    def$$1 = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    if (isUndef(cur)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      if (process.env.NODE_ENV !== 'production') {
+        var keyInLowerCase = key.toLowerCase();
+        if (
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
+        ) {
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
+        }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
+    }
+  }
+  return res
+}
+
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
+        }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production') {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      } else {
+        defineReactive$$1(vm, key, result[key]);
+      }
+    });
+    toggleObserving(true);
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else if (process.env.NODE_ENV !== 'production') {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
+  }
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  if (!children || !children.length) {
+    return {}
+  }
+  var slots = {};
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    return res && (
+      res.length === 0 ||
+      (res.length === 1 && res[0].isComment) // #9658
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallback,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) { // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
+        warn(
+          'slot v-bind without argument expects an Object',
+          this
+        );
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes = scopedSlotFn(props) || fallback;
+  } else {
+    nodes = this.$slots[name] || fallback;
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
+    }
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
+
+/*  */
+
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  if (process.env.NODE_ENV !== 'production') {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
+};
+
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    if (process.env.NODE_ENV !== 'production') {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  vnode, // we know it's MountedComponentVNode but flow doesn't
+  parent // activeInstance in lifecycle state
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (process.env.NODE_ENV !== 'production' &&
+    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.nativeOn)) {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
+
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
+  if (process.env.NODE_ENV !== 'production') {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  } else {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, null, true);
+  }
+}
+
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production' && vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                process.env.NODE_ENV !== 'production'
+                  ? ("timeout (" + (res.timeout) + "ms)")
+                  : null
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    if (process.env.NODE_ENV !== 'production') {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
+  }
+}
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    if (process.env.NODE_ENV !== 'production') {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  if (process.env.NODE_ENV !== 'production') {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (process.env.NODE_ENV !== 'production' && !config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = process.env.NODE_ENV !== 'production'
+    ? expOrFn.toString()
+    : '';
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        try {
+          this.cb.call(this.vm, value, oldValue);
+        } catch (e) {
+          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+        }
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    } else {
+      defineReactive$$1(props, key, value);
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    process.env.NODE_ENV !== 'production' && warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    if (process.env.NODE_ENV !== 'production') {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (process.env.NODE_ENV !== 'production' && getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else if (process.env.NODE_ENV !== 'production') {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      }
+    }
+  }
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (process.env.NODE_ENV !== 'production' &&
+      sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  if (process.env.NODE_ENV !== 'production') {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      try {
+        cb.call(vm, watcher.value);
+      } catch (error) {
+        handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
+      }
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+var uid$3 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$3++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
+    }
+
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
+        vm
+      );
+    }
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      initProxy(vm);
+    } else {
+      vm._renderProxy = vm;
+    }
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
+
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    }
+
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = latest[key];
+    }
+  }
+  return modified
+}
+
+function Vue (options) {
+  if (process.env.NODE_ENV !== 'production' &&
+    !(this instanceof Vue)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if (process.env.NODE_ENV !== 'production' && name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
+    };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
+
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
+    }
+
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
+    }
+
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
+
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
+
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
+
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
+
+/*  */
+
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
+    ) {
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if (process.env.NODE_ENV !== 'production' && type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
+    };
+  });
+}
+
+/*  */
+
+
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var cachedNode = cache[key];
+    if (cachedNode) {
+      var name = getComponentName(cachedNode.componentOptions);
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var cached$$1 = cache[key];
+  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
+    cached$$1.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        cache[key] = vnode;
+        keys.push(key);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  if (process.env.NODE_ENV !== 'production') {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive$$1
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue);
+
+Object.defineProperty(Vue.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue.prototype, '$ssrContext', {
+  get: function get () {
+    /* istanbul ignore next */
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
+
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.12';
+
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isPreTag = function (tag) { return tag === 'pre'; };
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!isDef(key)) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        a.asyncFactory === b.asyncFactory &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove$$1.listeners = listeners;
+    return remove$$1
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
+    }
+
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      if (process.env.NODE_ENV !== 'production') {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
+
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
+
+      if (process.env.NODE_ENV !== 'production' && data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
+
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
+
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      if (process.env.NODE_ENV !== 'production') {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setStyleScope(vnode.elm, i);
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
+    ) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
+        }
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    if (process.env.NODE_ENV !== 'production') {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkDuplicateKeys(ch);
+        }
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    if (process.env.NODE_ENV !== 'production') {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if (process.env.NODE_ENV !== 'production' &&
+                typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
+            }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
+                break
+              }
+              childNode = childNode.nextSibling;
+            }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if (process.env.NODE_ENV !== 'production' &&
+                typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
+        }
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
+        }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
+
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
+
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
+
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
+
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
+            } else if (process.env.NODE_ENV !== 'production') {
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
+            }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
+        }
+
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
+            }
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
+                }
+              }
+            } else {
+              registerRef(ancestor);
+            }
+            ancestor = ancestor.parent;
+          }
+        }
+
+        // destroy old node
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
+        }
+      }
+    }
+
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
+    }
+  }
+
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
+    };
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
+    }
+  }
+
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
+
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
+    }
+  }
+}
+
+var emptyModifiers = Object.create(null);
+
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
+    }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
+
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+    }
+  }
+}
+
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur);
+    }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
+    }
+  }
+}
+
+function setAttr (el, key, value) {
+  if (el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
+    }
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, convertEnumeratedValue(key, value));
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
+    }
+  } else {
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
+    }
+    el.setAttribute(key, value);
+  }
+}
+
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
+
+/*  */
+
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
+
+  var cls = genClassForVnode(vnode);
+
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
+
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
+
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+function parseFilters (exp) {
+  var inSingle = false;
+  var inDouble = false;
+  var inTemplateString = false;
+  var inRegex = false;
+  var curly = 0;
+  var square = 0;
+  var paren = 0;
+  var lastFilterIndex = 0;
+  var c, prev, i, expression, filters;
+
+  for (i = 0; i < exp.length; i++) {
+    prev = c;
+    c = exp.charCodeAt(i);
+    if (inSingle) {
+      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+    } else if (inDouble) {
+      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+    } else if (inTemplateString) {
+      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+    } else if (inRegex) {
+      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+    } else if (
+      c === 0x7C && // pipe
+      exp.charCodeAt(i + 1) !== 0x7C &&
+      exp.charCodeAt(i - 1) !== 0x7C &&
+      !curly && !square && !paren
+    ) {
+      if (expression === undefined) {
+        // first filter, end of expression
+        lastFilterIndex = i + 1;
+        expression = exp.slice(0, i).trim();
+      } else {
+        pushFilter();
+      }
+    } else {
+      switch (c) {
+        case 0x22: inDouble = true; break         // "
+        case 0x27: inSingle = true; break         // '
+        case 0x60: inTemplateString = true; break // `
+        case 0x28: paren++; break                 // (
+        case 0x29: paren--; break                 // )
+        case 0x5B: square++; break                // [
+        case 0x5D: square--; break                // ]
+        case 0x7B: curly++; break                 // {
+        case 0x7D: curly--; break                 // }
+      }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !validDivisionCharRE.test(p)) {
+          inRegex = true;
+        }
+      }
+    }
+  }
+
+  if (expression === undefined) {
+    expression = exp.slice(0, i).trim();
+  } else if (lastFilterIndex !== 0) {
+    pushFilter();
+  }
+
+  function pushFilter () {
+    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+    lastFilterIndex = i + 1;
+  }
+
+  if (filters) {
+    for (i = 0; i < filters.length; i++) {
+      expression = wrapFilter(expression, filters[i]);
+    }
+  }
+
+  return expression
+}
+
+function wrapFilter (exp, filter) {
+  var i = filter.indexOf('(');
+  if (i < 0) {
+    // _f: resolveFilter
+    return ("_f(\"" + filter + "\")(" + exp + ")")
+  } else {
+    var name = filter.slice(0, i);
+    var args = filter.slice(i + 1);
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+  }
+}
+
+/*  */
+
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
+  console.error(("[Vue compiler]: " + msg));
+}
+/* eslint-enable no-unused-vars */
+
+function pluckModuleFunction (
+  modules,
+  key
+) {
+  return modules
+    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+    : []
+}
+
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+  el.plain = false;
+}
+
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+  el.plain = false;
+}
+
+// add a raw attr (use this in preTransforms)
+function addRawAttr (el, name, value, range) {
+  el.attrsMap[name] = value;
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
+}
+
+function addDirective (
+  el,
+  name,
+  rawName,
+  value,
+  arg,
+  isDynamicArg,
+  modifiers,
+  range
+) {
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
+  el.plain = false;
+}
+
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
+function addHandler (
+  el,
+  name,
+  value,
+  modifiers,
+  important,
+  warn,
+  range,
+  dynamic
+) {
+  modifiers = modifiers || emptyObject;
+  // warn prevent and passive modifier
+  /* istanbul ignore if */
+  if (
+    process.env.NODE_ENV !== 'production' && warn &&
+    modifiers.prevent && modifiers.passive
+  ) {
+    warn(
+      'passive and prevent can\'t be used together. ' +
+      'Passive handler can\'t prevent default event.',
+      range
+    );
+  }
+
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
+  // check capture modifier
+  if (modifiers.capture) {
+    delete modifiers.capture;
+    name = prependModifierMarker('!', name, dynamic);
+  }
+  if (modifiers.once) {
+    delete modifiers.once;
+    name = prependModifierMarker('~', name, dynamic);
+  }
+  /* istanbul ignore if */
+  if (modifiers.passive) {
+    delete modifiers.passive;
+    name = prependModifierMarker('&', name, dynamic);
+  }
+
+  var events;
+  if (modifiers.native) {
+    delete modifiers.native;
+    events = el.nativeEvents || (el.nativeEvents = {});
+  } else {
+    events = el.events || (el.events = {});
+  }
+
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+  if (modifiers !== emptyObject) {
+    newHandler.modifiers = modifiers;
+  }
+
+  var handlers = events[name];
+  /* istanbul ignore if */
+  if (Array.isArray(handlers)) {
+    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+  } else if (handlers) {
+    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+  } else {
+    events[name] = newHandler;
+  }
+
+  el.plain = false;
+}
+
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
+function getBindingAttr (
+  el,
+  name,
+  getStatic
+) {
+  var dynamicValue =
+    getAndRemoveAttr(el, ':' + name) ||
+    getAndRemoveAttr(el, 'v-bind:' + name);
+  if (dynamicValue != null) {
+    return parseFilters(dynamicValue)
+  } else if (getStatic !== false) {
+    var staticValue = getAndRemoveAttr(el, name);
+    if (staticValue != null) {
+      return JSON.stringify(staticValue)
+    }
+  }
+}
+
+// note: this only removes the attr from the Array (attrsList) so that it
+// doesn't get processed by processAttrs.
+// By default it does NOT remove it from the map (attrsMap) because the map is
+// needed during codegen.
+function getAndRemoveAttr (
+  el,
+  name,
+  removeFromMap
+) {
+  var val;
+  if ((val = el.attrsMap[name]) != null) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      if (list[i].name === name) {
+        list.splice(i, 1);
+        break
+      }
+    }
+  }
+  if (removeFromMap) {
+    delete el.attrsMap[name];
+  }
+  return val
+}
+
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
+/*  */
+
+/**
+ * Cross-platform code generation for component v-model
+ */
+function genComponentModel (
+  el,
+  value,
+  modifiers
+) {
+  var ref = modifiers || {};
+  var number = ref.number;
+  var trim = ref.trim;
+
+  var baseValueExpression = '$$v';
+  var valueExpression = baseValueExpression;
+  if (trim) {
+    valueExpression =
+      "(typeof " + baseValueExpression + " === 'string'" +
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+  var assignment = genAssignmentCode(value, valueExpression);
+
+  el.model = {
+    value: ("(" + value + ")"),
+    expression: JSON.stringify(value),
+    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+  };
+}
+
+/**
+ * Cross-platform codegen helper for generating v-model value assignment code.
+ */
+function genAssignmentCode (
+  value,
+  assignment
+) {
+  var res = parseModel(value);
+  if (res.key === null) {
+    return (value + "=" + assignment)
+  } else {
+    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
+  }
+}
+
+/**
+ * Parse a v-model expression into a base path and a final key segment.
+ * Handles both dot-path and possible square brackets.
+ *
+ * Possible cases:
+ *
+ * - test
+ * - test[key]
+ * - test[test1[key]]
+ * - test["a"][key]
+ * - xxx.test[a[a].test1[key]]
+ * - test.xxx.a["asa"][test1[key]]
+ *
+ */
+
+var len, str, chr, index$1, expressionPos, expressionEndPos;
+
+
+
+function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
+  len = val.length;
+
+  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+    index$1 = val.lastIndexOf('.');
+    if (index$1 > -1) {
+      return {
+        exp: val.slice(0, index$1),
+        key: '"' + val.slice(index$1 + 1) + '"'
+      }
+    } else {
+      return {
+        exp: val,
+        key: null
+      }
+    }
+  }
+
+  str = val;
+  index$1 = expressionPos = expressionEndPos = 0;
+
+  while (!eof()) {
+    chr = next();
+    /* istanbul ignore if */
+    if (isStringStart(chr)) {
+      parseString(chr);
+    } else if (chr === 0x5B) {
+      parseBracket(chr);
+    }
+  }
+
+  return {
+    exp: val.slice(0, expressionPos),
+    key: val.slice(expressionPos + 1, expressionEndPos)
+  }
+}
+
+function next () {
+  return str.charCodeAt(++index$1)
+}
+
+function eof () {
+  return index$1 >= len
+}
+
+function isStringStart (chr) {
+  return chr === 0x22 || chr === 0x27
+}
+
+function parseBracket (chr) {
+  var inBracket = 1;
+  expressionPos = index$1;
+  while (!eof()) {
+    chr = next();
+    if (isStringStart(chr)) {
+      parseString(chr);
+      continue
+    }
+    if (chr === 0x5B) { inBracket++; }
+    if (chr === 0x5D) { inBracket--; }
+    if (inBracket === 0) {
+      expressionEndPos = index$1;
+      break
+    }
+  }
+}
+
+function parseString (chr) {
+  var stringQuote = chr;
+  while (!eof()) {
+    chr = next();
+    if (chr === stringQuote) {
+      break
+    }
+  }
+}
+
+/*  */
+
+var warn$1;
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+function model (
+  el,
+  dir,
+  _warn
+) {
+  warn$1 = _warn;
+  var value = dir.value;
+  var modifiers = dir.modifiers;
+  var tag = el.tag;
+  var type = el.attrsMap.type;
+
+  if (process.env.NODE_ENV !== 'production') {
+    // inputs with type="file" are read only and setting the input's
+    // value will throw an error.
+    if (tag === 'input' && type === 'file') {
+      warn$1(
+        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+        "File inputs are read only. Use a v-on:change listener instead.",
+        el.rawAttrsMap['v-model']
+      );
+    }
+  }
+
+  if (el.component) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else if (tag === 'select') {
+    genSelect(el, value, modifiers);
+  } else if (tag === 'input' && type === 'checkbox') {
+    genCheckboxModel(el, value, modifiers);
+  } else if (tag === 'input' && type === 'radio') {
+    genRadioModel(el, value, modifiers);
+  } else if (tag === 'input' || tag === 'textarea') {
+    genDefaultModel(el, value, modifiers);
+  } else if (!config.isReservedTag(tag)) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else if (process.env.NODE_ENV !== 'production') {
+    warn$1(
+      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+      "v-model is not supported on this element type. " +
+      'If you are working with contenteditable, it\'s recommended to ' +
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
+    );
+  }
+
+  // ensure runtime directive metadata
+  return true
+}
+
+function genCheckboxModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+  addProp(el, 'checked',
+    "Array.isArray(" + value + ")" +
+    "?_i(" + value + "," + valueBinding + ")>-1" + (
+      trueValueBinding === 'true'
+        ? (":(" + value + ")")
+        : (":_q(" + value + "," + trueValueBinding + ")")
+    )
+  );
+  addHandler(el, 'change',
+    "var $$a=" + value + "," +
+        '$$el=$event.target,' +
+        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+    'if(Array.isArray($$a)){' +
+      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+          '$$i=_i($$a,$$v);' +
+      "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+      "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+    null, true
+  );
+}
+
+function genRadioModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+}
+
+function genSelect (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var selectedVal = "Array.prototype.filter" +
+    ".call($event.target.options,function(o){return o.selected})" +
+    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+    "return " + (number ? '_n(val)' : 'val') + "})";
+
+  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+  var code = "var $$selectedVal = " + selectedVal + ";";
+  code = code + " " + (genAssignmentCode(value, assignment));
+  addHandler(el, 'change', code, null, true);
+}
+
+function genDefaultModel (
+  el,
+  value,
+  modifiers
+) {
+  var type = el.attrsMap.type;
+
+  // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
+  if (process.env.NODE_ENV !== 'production') {
+    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value$1 && !typeBinding) {
+      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+      warn$1(
+        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
+      );
+    }
+  }
+
+  var ref = modifiers || {};
+  var lazy = ref.lazy;
+  var number = ref.number;
+  var trim = ref.trim;
+  var needCompositionGuard = !lazy && type !== 'range';
+  var event = lazy
+    ? 'change'
+    : type === 'range'
+      ? RANGE_TOKEN
+      : 'input';
+
+  var valueExpression = '$event.target.value';
+  if (trim) {
+    valueExpression = "$event.target.value.trim()";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+
+  var code = genAssignmentCode(value, valueExpression);
+  if (needCompositionGuard) {
+    code = "if($event.target.composing)return;" + code;
+  }
+
+  addProp(el, 'value', ("(" + value + ")"));
+  addHandler(el, event, code, null, true);
+  if (trim || number) {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
+}
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+function add$1 (
+  name,
+  handler,
+  capture,
+  passive
+) {
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
+  target$1.addEventListener(
+    name,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  name,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    name,
+    handler._wrapper || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+var svgContainer;
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (!(key in props)) {
+      elm[key] = '';
+    }
+  }
+
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
+    }
+
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
+    }
+  }
+}
+
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
+  }
+  return value !== newVal
+}
+
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
+
+/*  */
+
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+    }
+  });
+  return res
+});
+
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
+
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
+
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
+    }
+  }
+
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
+
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
+    }
+  }
+  return res
+}
+
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
+    }
+  }
+};
+
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+});
+
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
+    }
+  }
+}
+
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+var whitespaceRE = /\s+/;
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
+    }
+  }
+}
+
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
+    }
+    if (!el.classList.length) {
+      el.removeAttribute('class');
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
+    }
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
+    }
+  }
+}
+
+/*  */
+
+function resolveTransition (def$$1) {
+  if (!def$$1) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def$$1 === 'object') {
+    var res = {};
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
+    }
+    extend(res, def$$1);
+    return res
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
+  }
+}
+
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
+    }
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
+    }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
+
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
+    }
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
+    }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
+
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
+
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
+
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
+function toMs (s) {
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
+}
+
+/*  */
+
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
+
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    context = transitionNode.context;
+    transitionNode = transitionNode.parent;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if (process.env.NODE_ENV !== 'production' && explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
+    }
+    el._enterCb = null;
+  });
+
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
+    });
+  }
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      }
+    });
+  }
+
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if (process.env.NODE_ENV !== 'production' && isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show && el.parentNode) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
+      }
+    }
+  },
+
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
+        }
+      }
+    }
+  }
+};
+
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
+        }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (!value === !oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
+    }
+
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(isNotTextNode);
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
+
+    // warn multiple elements
+    if (process.env.NODE_ENV !== 'production' && children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if (process.env.NODE_ENV !== 'production' &&
+      mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else if (process.env.NODE_ENV !== 'production') {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
+
+// install platform patch function
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else if (
+        process.env.NODE_ENV !== 'production' &&
+        process.env.NODE_ENV !== 'test'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (process.env.NODE_ENV !== 'production' &&
+      process.env.NODE_ENV !== 'test' &&
+      config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
+      console[console.info ? 'info' : 'log'](
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
+      );
+    }
+  }, 0);
+}
+
+/*  */
+
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+
+var buildRegex = cached(function (delimiters) {
+  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+});
+
+
+
+function parseText (
+  text,
+  delimiters
+) {
+  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+  if (!tagRE.test(text)) {
+    return
+  }
+  var tokens = [];
+  var rawTokens = [];
+  var lastIndex = tagRE.lastIndex = 0;
+  var match, index, tokenValue;
+  while ((match = tagRE.exec(text))) {
+    index = match.index;
+    // push text token
+    if (index > lastIndex) {
+      rawTokens.push(tokenValue = text.slice(lastIndex, index));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    // tag token
+    var exp = parseFilters(match[1].trim());
+    tokens.push(("_s(" + exp + ")"));
+    rawTokens.push({ '@binding': exp });
+    lastIndex = index + match[0].length;
+  }
+  if (lastIndex < text.length) {
+    rawTokens.push(tokenValue = text.slice(lastIndex));
+    tokens.push(JSON.stringify(tokenValue));
+  }
+  return {
+    expression: tokens.join('+'),
+    tokens: rawTokens
+  }
+}
+
+/*  */
+
+function transformNode (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticClass = getAndRemoveAttr(el, 'class');
+  if (process.env.NODE_ENV !== 'production' && staticClass) {
+    var res = parseText(staticClass, options.delimiters);
+    if (res) {
+      warn(
+        "class=\"" + staticClass + "\": " +
+        'Interpolation inside attributes has been removed. ' +
+        'Use v-bind or the colon shorthand instead. For example, ' +
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
+      );
+    }
+  }
+  if (staticClass) {
+    el.staticClass = JSON.stringify(staticClass);
+  }
+  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+  if (classBinding) {
+    el.classBinding = classBinding;
+  }
+}
+
+function genData (el) {
+  var data = '';
+  if (el.staticClass) {
+    data += "staticClass:" + (el.staticClass) + ",";
+  }
+  if (el.classBinding) {
+    data += "class:" + (el.classBinding) + ",";
+  }
+  return data
+}
+
+var klass$1 = {
+  staticKeys: ['staticClass'],
+  transformNode: transformNode,
+  genData: genData
+};
+
+/*  */
+
+function transformNode$1 (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticStyle = getAndRemoveAttr(el, 'style');
+  if (staticStyle) {
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production') {
+      var res = parseText(staticStyle, options.delimiters);
+      if (res) {
+        warn(
+          "style=\"" + staticStyle + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
+        );
+      }
+    }
+    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+  }
+
+  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+  if (styleBinding) {
+    el.styleBinding = styleBinding;
+  }
+}
+
+function genData$1 (el) {
+  var data = '';
+  if (el.staticStyle) {
+    data += "staticStyle:" + (el.staticStyle) + ",";
+  }
+  if (el.styleBinding) {
+    data += "style:(" + (el.styleBinding) + "),";
+  }
+  return data
+}
+
+var style$1 = {
+  staticKeys: ['staticStyle'],
+  transformNode: transformNode$1,
+  genData: genData$1
+};
+
+/*  */
+
+var decoder;
+
+var he = {
+  decode: function decode (html) {
+    decoder = decoder || document.createElement('div');
+    decoder.innerHTML = html;
+    return decoder.textContent
+  }
+};
+
+/*  */
+
+var isUnaryTag = makeMap(
+  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+  'link,meta,param,source,track,wbr'
+);
+
+// Elements that you can, intentionally, leave open
+// (and which close themselves)
+var canBeLeftOpenTag = makeMap(
+  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+);
+
+// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+var isNonPhrasingTag = makeMap(
+  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+  'title,tr,track'
+);
+
+/**
+ * Not type-checking this file because it's mostly vendor code.
+ */
+
+// Regular Expressions for parsing tags and attributes
+var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+var startTagOpen = new RegExp(("^<" + qnameCapture));
+var startTagClose = /^\s*(\/?)>/;
+var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+var doctype = /^<!DOCTYPE [^>]+>/i;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
+var conditionalComment = /^<!\[/;
+
+// Special Elements (can contain anything)
+var isPlainTextElement = makeMap('script,style,textarea', true);
+var reCache = {};
+
+var decodingMap = {
+  '&lt;': '<',
+  '&gt;': '>',
+  '&quot;': '"',
+  '&amp;': '&',
+  '&#10;': '\n',
+  '&#9;': '\t',
+  '&#39;': "'"
+};
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+// #5992
+var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+function decodeAttr (value, shouldDecodeNewlines) {
+  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+  return value.replace(re, function (match) { return decodingMap[match]; })
+}
+
+function parseHTML (html, options) {
+  var stack = [];
+  var expectHTML = options.expectHTML;
+  var isUnaryTag$$1 = options.isUnaryTag || no;
+  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+  var index = 0;
+  var last, lastTag;
+  while (html) {
+    last = html;
+    // Make sure we're not in a plaintext content element like script/style
+    if (!lastTag || !isPlainTextElement(lastTag)) {
+      var textEnd = html.indexOf('<');
+      if (textEnd === 0) {
+        // Comment:
+        if (comment.test(html)) {
+          var commentEnd = html.indexOf('-->');
+
+          if (commentEnd >= 0) {
+            if (options.shouldKeepComment) {
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+            }
+            advance(commentEnd + 3);
+            continue
+          }
+        }
+
+        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+        if (conditionalComment.test(html)) {
+          var conditionalEnd = html.indexOf(']>');
+
+          if (conditionalEnd >= 0) {
+            advance(conditionalEnd + 2);
+            continue
+          }
+        }
+
+        // Doctype:
+        var doctypeMatch = html.match(doctype);
+        if (doctypeMatch) {
+          advance(doctypeMatch[0].length);
+          continue
+        }
+
+        // End tag:
+        var endTagMatch = html.match(endTag);
+        if (endTagMatch) {
+          var curIndex = index;
+          advance(endTagMatch[0].length);
+          parseEndTag(endTagMatch[1], curIndex, index);
+          continue
+        }
+
+        // Start tag:
+        var startTagMatch = parseStartTag();
+        if (startTagMatch) {
+          handleStartTag(startTagMatch);
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+            advance(1);
+          }
+          continue
+        }
+      }
+
+      var text = (void 0), rest = (void 0), next = (void 0);
+      if (textEnd >= 0) {
+        rest = html.slice(textEnd);
+        while (
+          !endTag.test(rest) &&
+          !startTagOpen.test(rest) &&
+          !comment.test(rest) &&
+          !conditionalComment.test(rest)
+        ) {
+          // < in plain text, be forgiving and treat it as text
+          next = rest.indexOf('<', 1);
+          if (next < 0) { break }
+          textEnd += next;
+          rest = html.slice(textEnd);
+        }
+        text = html.substring(0, textEnd);
+      }
+
+      if (textEnd < 0) {
+        text = html;
+      }
+
+      if (text) {
+        advance(text.length);
+      }
+
+      if (options.chars && text) {
+        options.chars(text, index - text.length, index);
+      }
+    } else {
+      var endTagLength = 0;
+      var stackedTag = lastTag.toLowerCase();
+      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+        endTagLength = endTag.length;
+        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+          text = text
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+        }
+        if (shouldIgnoreFirstNewline(stackedTag, text)) {
+          text = text.slice(1);
+        }
+        if (options.chars) {
+          options.chars(text);
+        }
+        return ''
+      });
+      index += html.length - rest$1.length;
+      html = rest$1;
+      parseEndTag(stackedTag, index - endTagLength, index);
+    }
+
+    if (html === last) {
+      options.chars && options.chars(html);
+      if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
+      }
+      break
+    }
+  }
+
+  // Clean up any remaining tags
+  parseEndTag();
+
+  function advance (n) {
+    index += n;
+    html = html.substring(n);
+  }
+
+  function parseStartTag () {
+    var start = html.match(startTagOpen);
+    if (start) {
+      var match = {
+        tagName: start[1],
+        attrs: [],
+        start: index
+      };
+      advance(start[0].length);
+      var end, attr;
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
+        advance(attr[0].length);
+        attr.end = index;
+        match.attrs.push(attr);
+      }
+      if (end) {
+        match.unarySlash = end[1];
+        advance(end[0].length);
+        match.end = index;
+        return match
+      }
+    }
+  }
+
+  function handleStartTag (match) {
+    var tagName = match.tagName;
+    var unarySlash = match.unarySlash;
+
+    if (expectHTML) {
+      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+        parseEndTag(lastTag);
+      }
+      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+        parseEndTag(tagName);
+      }
+    }
+
+    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+    var l = match.attrs.length;
+    var attrs = new Array(l);
+    for (var i = 0; i < l; i++) {
+      var args = match.attrs[i];
+      var value = args[3] || args[4] || args[5] || '';
+      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+        ? options.shouldDecodeNewlinesForHref
+        : options.shouldDecodeNewlines;
+      attrs[i] = {
+        name: args[1],
+        value: decodeAttr(value, shouldDecodeNewlines)
+      };
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
+    }
+
+    if (!unary) {
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+      lastTag = tagName;
+    }
+
+    if (options.start) {
+      options.start(tagName, attrs, unary, match.start, match.end);
+    }
+  }
+
+  function parseEndTag (tagName, start, end) {
+    var pos, lowerCasedTagName;
+    if (start == null) { start = index; }
+    if (end == null) { end = index; }
+
+    // Find the closest opened tag of the same type
+    if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
+      for (pos = stack.length - 1; pos >= 0; pos--) {
+        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+          break
+        }
+      }
+    } else {
+      // If no tag name is provided, clean shop
+      pos = 0;
+    }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if (process.env.NODE_ENV !== 'production' &&
+          (i > pos || !tagName) &&
+          options.warn
+        ) {
+          options.warn(
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
+          );
+        }
+        if (options.end) {
+          options.end(stack[i].tag, start, end);
+        }
+      }
+
+      // Remove the open elements from the stack
+      stack.length = pos;
+      lastTag = pos && stack[pos - 1].tag;
+    } else if (lowerCasedTagName === 'br') {
+      if (options.start) {
+        options.start(tagName, [], true, start, end);
+      }
+    } else if (lowerCasedTagName === 'p') {
+      if (options.start) {
+        options.start(tagName, [], false, start, end);
+      }
+      if (options.end) {
+        options.end(tagName, start, end);
+      }
+    }
+  }
+}
+
+/*  */
+
+var onRE = /^@|^v-on:/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
+
+var argRE = /:(.*)$/;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE$1 = /\s+/g;
+
+var invalidAttributeRE = /[\s"'<>\/=]/;
+
+var decodeHTMLCached = cached(he.decode);
+
+var emptySlotScopeToken = "_empty_";
+
+// configurable state
+var warn$2;
+var delimiters;
+var transforms;
+var preTransforms;
+var postTransforms;
+var platformIsPreTag;
+var platformMustUseProp;
+var platformGetTagNamespace;
+var maybeComponent;
+
+function createASTElement (
+  tag,
+  attrs,
+  parent
+) {
+  return {
+    type: 1,
+    tag: tag,
+    attrsList: attrs,
+    attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
+    parent: parent,
+    children: []
+  }
+}
+
+/**
+ * Convert HTML string to AST.
+ */
+function parse (
+  template,
+  options
+) {
+  warn$2 = options.warn || baseWarn;
+
+  platformIsPreTag = options.isPreTag || no;
+  platformMustUseProp = options.mustUseProp || no;
+  platformGetTagNamespace = options.getTagNamespace || no;
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+
+  transforms = pluckModuleFunction(options.modules, 'transformNode');
+  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+  delimiters = options.delimiters;
+
+  var stack = [];
+  var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
+  var root;
+  var currentParent;
+  var inVPre = false;
+  var inPre = false;
+  var warned = false;
+
+  function warnOnce (msg, range) {
+    if (!warned) {
+      warned = true;
+      warn$2(msg, range);
+    }
+  }
+
+  function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else if (process.env.NODE_ENV !== 'production') {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
+    // check pre state
+    if (element.pre) {
+      inVPre = false;
+    }
+    if (platformIsPreTag(element.tag)) {
+      inPre = false;
+    }
+    // apply post-transforms
+    for (var i = 0; i < postTransforms.length; i++) {
+      postTransforms[i](element, options);
+    }
+  }
+
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
+  parseHTML(template, {
+    warn: warn$2,
+    expectHTML: options.expectHTML,
+    isUnaryTag: options.isUnaryTag,
+    canBeLeftOpenTag: options.canBeLeftOpenTag,
+    shouldDecodeNewlines: options.shouldDecodeNewlines,
+    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+    shouldKeepComment: options.comments,
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
+      // check namespace.
+      // inherit parent ns if there is one
+      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+      // handle IE svg bug
+      /* istanbul ignore if */
+      if (isIE && ns === 'svg') {
+        attrs = guardIESVGBug(attrs);
+      }
+
+      var element = createASTElement(tag, attrs, currentParent);
+      if (ns) {
+        element.ns = ns;
+      }
+
+      if (process.env.NODE_ENV !== 'production') {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$2(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
+      if (isForbiddenTag(element) && !isServerRendering()) {
+        element.forbidden = true;
+        process.env.NODE_ENV !== 'production' && warn$2(
+          'Templates should only be responsible for mapping the state to the ' +
+          'UI. Avoid placing tags with side-effects in your templates, such as ' +
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
+        );
+      }
+
+      // apply pre-transforms
+      for (var i = 0; i < preTransforms.length; i++) {
+        element = preTransforms[i](element, options) || element;
+      }
+
+      if (!inVPre) {
+        processPre(element);
+        if (element.pre) {
+          inVPre = true;
+        }
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = true;
+      }
+      if (inVPre) {
+        processRawAttrs(element);
+      } else if (!element.processed) {
+        // structural directives
+        processFor(element);
+        processIf(element);
+        processOnce(element);
+      }
+
+      if (!root) {
+        root = element;
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(root);
+        }
+      }
+
+      if (!unary) {
+        currentParent = element;
+        stack.push(element);
+      } else {
+        closeElement(element);
+      }
+    },
+
+    end: function end (tag, start, end$1) {
+      var element = stack[stack.length - 1];
+      // pop stack
+      stack.length -= 1;
+      currentParent = stack[stack.length - 1];
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        element.end = end$1;
+      }
+      closeElement(element);
+    },
+
+    chars: function chars (text, start, end) {
+      if (!currentParent) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (text === template) {
+            warnOnce(
+              'Component template requires a root element, rather than just text.',
+              { start: start }
+            );
+          } else if ((text = text.trim())) {
+            warnOnce(
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
+            );
+          }
+        }
+        return
+      }
+      // IE textarea placeholder bug
+      /* istanbul ignore if */
+      if (isIE &&
+        currentParent.tag === 'textarea' &&
+        currentParent.attrsMap.placeholder === text
+      ) {
+        return
+      }
+      var children = currentParent.children;
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
+      if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE$1, ' ');
+        }
+        var res;
+        var child;
+        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+          child = {
+            type: 2,
+            expression: res.expression,
+            tokens: res.tokens,
+            text: text
+          };
+        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+          child = {
+            type: 3,
+            text: text
+          };
+        }
+        if (child) {
+          if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
+        }
+      }
+    },
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
+    }
+  });
+  return root
+}
+
+function processPre (el) {
+  if (getAndRemoveAttr(el, 'v-pre') != null) {
+    el.pre = true;
+  }
+}
+
+function processRawAttrs (el) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
+      attrs[i] = {
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
+      };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
+    }
+  } else if (!el.pre) {
+    // non root node in pre blocks with no attributes
+    el.plain = true;
+  }
+}
+
+function processElement (
+  element,
+  options
+) {
+  processKey(element);
+
+  // determine whether this is a plain element after
+  // removing structural attributes
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
+
+  processRef(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
+  processComponent(element);
+  for (var i = 0; i < transforms.length; i++) {
+    element = transforms[i](element, options) || element;
+  }
+  processAttrs(element);
+  return element
+}
+
+function processKey (el) {
+  var exp = getBindingAttr(el, 'key');
+  if (exp) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (el.tag === 'template') {
+        warn$2(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$2(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
+    }
+    el.key = exp;
+  }
+}
+
+function processRef (el) {
+  var ref = getBindingAttr(el, 'ref');
+  if (ref) {
+    el.ref = ref;
+    el.refInFor = checkInFor(el);
+  }
+}
+
+function processFor (el) {
+  var exp;
+  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+    var res = parseFor(exp);
+    if (res) {
+      extend(el, res);
+    } else if (process.env.NODE_ENV !== 'production') {
+      warn$2(
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+}
+
+
+
+function parseFor (exp) {
+  var inMatch = exp.match(forAliasRE);
+  if (!inMatch) { return }
+  var res = {};
+  res.for = inMatch[2].trim();
+  var alias = inMatch[1].trim().replace(stripParensRE, '');
+  var iteratorMatch = alias.match(forIteratorRE);
+  if (iteratorMatch) {
+    res.alias = alias.replace(forIteratorRE, '').trim();
+    res.iterator1 = iteratorMatch[1].trim();
+    if (iteratorMatch[2]) {
+      res.iterator2 = iteratorMatch[2].trim();
+    }
+  } else {
+    res.alias = alias;
+  }
+  return res
+}
+
+function processIf (el) {
+  var exp = getAndRemoveAttr(el, 'v-if');
+  if (exp) {
+    el.if = exp;
+    addIfCondition(el, {
+      exp: exp,
+      block: el
+    });
+  } else {
+    if (getAndRemoveAttr(el, 'v-else') != null) {
+      el.else = true;
+    }
+    var elseif = getAndRemoveAttr(el, 'v-else-if');
+    if (elseif) {
+      el.elseif = elseif;
+    }
+  }
+}
+
+function processIfConditions (el, parent) {
+  var prev = findPrevElement(parent.children);
+  if (prev && prev.if) {
+    addIfCondition(prev, {
+      exp: el.elseif,
+      block: el
+    });
+  } else if (process.env.NODE_ENV !== 'production') {
+    warn$2(
+      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+    );
+  }
+}
+
+function findPrevElement (children) {
+  var i = children.length;
+  while (i--) {
+    if (children[i].type === 1) {
+      return children[i]
+    } else {
+      if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
+        warn$2(
+          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+          "will be ignored.",
+          children[i]
+        );
+      }
+      children.pop();
+    }
+  }
+}
+
+function addIfCondition (el, condition) {
+  if (!el.ifConditions) {
+    el.ifConditions = [];
+  }
+  el.ifConditions.push(condition);
+}
+
+function processOnce (el) {
+  var once$$1 = getAndRemoveAttr(el, 'v-once');
+  if (once$$1 != null) {
+    el.once = true;
+  }
+}
+
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && slotScope) {
+      warn$2(
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+      warn$2(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
+    if (el.tag === 'template') {
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (el.slotTarget || el.slotScope) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$2(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+      }
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (!maybeComponent(el)) {
+            warn$2(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$2(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
+      }
+    }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else if (process.env.NODE_ENV !== 'production') {
+      warn$2(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if (process.env.NODE_ENV !== 'production' && el.key) {
+      warn$2(
+        "`key` does not work on <slot> because slots are abstract outlets " +
+        "and can possibly expand into multiple elements. " +
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
+      );
+    }
+  }
+}
+
+function processComponent (el) {
+  var binding;
+  if ((binding = getBindingAttr(el, 'is'))) {
+    el.component = binding;
+  }
+  if (getAndRemoveAttr(el, 'inline-template') != null) {
+    el.inlineTemplate = true;
+  }
+}
+
+function processAttrs (el) {
+  var list = el.attrsList;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+  for (i = 0, l = list.length; i < l; i++) {
+    name = rawName = list[i].name;
+    value = list[i].value;
+    if (dirRE.test(name)) {
+      // mark element as dynamic
+      el.hasBindings = true;
+      // modifiers
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
+      if (modifiers) {
+        name = name.replace(modifierRE, '');
+      }
+      if (bindRE.test(name)) { // v-bind
+        name = name.replace(bindRE, '');
+        value = parseFilters(value);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          process.env.NODE_ENV !== 'production' &&
+          value.trim().length === 0
+        ) {
+          warn$2(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
+        if (modifiers) {
+          if (modifiers.prop && !isDynamic) {
+            name = camelize(name);
+            if (name === 'innerHtml') { name = 'innerHTML'; }
+          }
+          if (modifiers.camel && !isDynamic) {
+            name = camelize(name);
+          }
+          if (modifiers.sync) {
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i],
+                true // dynamic
+              );
+            }
+          }
+        }
+        if ((modifiers && modifiers.prop) || (
+          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+        )) {
+          addProp(el, name, value, list[i], isDynamic);
+        } else {
+          addAttr(el, name, value, list[i], isDynamic);
+        }
+      } else if (onRE.test(name)) { // v-on
+        name = name.replace(onRE, '');
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
+      } else { // normal directives
+        name = name.replace(dirRE, '');
+        // parse arg
+        var argMatch = name.match(argRE);
+        var arg = argMatch && argMatch[1];
+        isDynamic = false;
+        if (arg) {
+          name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
+        }
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+        if (process.env.NODE_ENV !== 'production' && name === 'model') {
+          checkForAliasModel(el, value);
+        }
+      }
+    } else {
+      // literal attribute
+      if (process.env.NODE_ENV !== 'production') {
+        var res = parseText(value, delimiters);
+        if (res) {
+          warn$2(
+            name + "=\"" + value + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
+          );
+        }
+      }
+      addAttr(el, name, JSON.stringify(value), list[i]);
+      // #6887 firefox doesn't update muted state if set via attribute
+      // even immediately after element creation
+      if (!el.component &&
+          name === 'muted' &&
+          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+        addProp(el, name, 'true', list[i]);
+      }
+    }
+  }
+}
+
+function checkInFor (el) {
+  var parent = el;
+  while (parent) {
+    if (parent.for !== undefined) {
+      return true
+    }
+    parent = parent.parent;
+  }
+  return false
+}
+
+function parseModifiers (name) {
+  var match = name.match(modifierRE);
+  if (match) {
+    var ret = {};
+    match.forEach(function (m) { ret[m.slice(1)] = true; });
+    return ret
+  }
+}
+
+function makeAttrsMap (attrs) {
+  var map = {};
+  for (var i = 0, l = attrs.length; i < l; i++) {
+    if (
+      process.env.NODE_ENV !== 'production' &&
+      map[attrs[i].name] && !isIE && !isEdge
+    ) {
+      warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
+    }
+    map[attrs[i].name] = attrs[i].value;
+  }
+  return map
+}
+
+// for script (e.g. type="x/template") or style, do not decode content
+function isTextTag (el) {
+  return el.tag === 'script' || el.tag === 'style'
+}
+
+function isForbiddenTag (el) {
+  return (
+    el.tag === 'style' ||
+    (el.tag === 'script' && (
+      !el.attrsMap.type ||
+      el.attrsMap.type === 'text/javascript'
+    ))
+  )
+}
+
+var ieNSBug = /^xmlns:NS\d+/;
+var ieNSPrefix = /^NS\d+:/;
+
+/* istanbul ignore next */
+function guardIESVGBug (attrs) {
+  var res = [];
+  for (var i = 0; i < attrs.length; i++) {
+    var attr = attrs[i];
+    if (!ieNSBug.test(attr.name)) {
+      attr.name = attr.name.replace(ieNSPrefix, '');
+      res.push(attr);
+    }
+  }
+  return res
+}
+
+function checkForAliasModel (el, value) {
+  var _el = el;
+  while (_el) {
+    if (_el.for && _el.alias === value) {
+      warn$2(
+        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+        "You are binding v-model directly to a v-for iteration alias. " +
+        "This will not be able to modify the v-for source array because " +
+        "writing to the alias is like modifying a function local variable. " +
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
+      );
+    }
+    _el = _el.parent;
+  }
+}
+
+/*  */
+
+function preTransformNode (el, options) {
+  if (el.tag === 'input') {
+    var map = el.attrsMap;
+    if (!map['v-model']) {
+      return
+    }
+
+    var typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = "(" + (map['v-bind']) + ").type";
+    }
+
+    if (typeBinding) {
+      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+      // 1. checkbox
+      var branch0 = cloneASTElement(el);
+      // process for on the main node
+      processFor(branch0);
+      addRawAttr(branch0, 'type', 'checkbox');
+      processElement(branch0, options);
+      branch0.processed = true; // prevent it from double-processed
+      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+      addIfCondition(branch0, {
+        exp: branch0.if,
+        block: branch0
+      });
+      // 2. add radio else-if condition
+      var branch1 = cloneASTElement(el);
+      getAndRemoveAttr(branch1, 'v-for', true);
+      addRawAttr(branch1, 'type', 'radio');
+      processElement(branch1, options);
+      addIfCondition(branch0, {
+        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+        block: branch1
+      });
+      // 3. other
+      var branch2 = cloneASTElement(el);
+      getAndRemoveAttr(branch2, 'v-for', true);
+      addRawAttr(branch2, ':type', typeBinding);
+      processElement(branch2, options);
+      addIfCondition(branch0, {
+        exp: ifCondition,
+        block: branch2
+      });
+
+      if (hasElse) {
+        branch0.else = true;
+      } else if (elseIfCondition) {
+        branch0.elseif = elseIfCondition;
+      }
+
+      return branch0
+    }
+  }
+}
+
+function cloneASTElement (el) {
+  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+}
+
+var model$1 = {
+  preTransformNode: preTransformNode
+};
+
+var modules$1 = [
+  klass$1,
+  style$1,
+  model$1
+];
+
+/*  */
+
+function text (el, dir) {
+  if (dir.value) {
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
+  }
+}
+
+/*  */
+
+function html (el, dir) {
+  if (dir.value) {
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
+  }
+}
+
+var directives$1 = {
+  model: model,
+  text: text,
+  html: html
+};
+
+/*  */
+
+var baseOptions = {
+  expectHTML: true,
+  modules: modules$1,
+  directives: directives$1,
+  isPreTag: isPreTag,
+  isUnaryTag: isUnaryTag,
+  mustUseProp: mustUseProp,
+  canBeLeftOpenTag: canBeLeftOpenTag,
+  isReservedTag: isReservedTag,
+  getTagNamespace: getTagNamespace,
+  staticKeys: genStaticKeys(modules$1)
+};
+
+/*  */
+
+var isStaticKey;
+var isPlatformReservedTag;
+
+var genStaticKeysCached = cached(genStaticKeys$1);
+
+/**
+ * Goal of the optimizer: walk the generated template AST tree
+ * and detect sub-trees that are purely static, i.e. parts of
+ * the DOM that never needs to change.
+ *
+ * Once we detect these sub-trees, we can:
+ *
+ * 1. Hoist them into constants, so that we no longer need to
+ *    create fresh nodes for them on each re-render;
+ * 2. Completely skip them in the patching process.
+ */
+function optimize (root, options) {
+  if (!root) { return }
+  isStaticKey = genStaticKeysCached(options.staticKeys || '');
+  isPlatformReservedTag = options.isReservedTag || no;
+  // first pass: mark all non-static nodes.
+  markStatic$1(root);
+  // second pass: mark static roots.
+  markStaticRoots(root, false);
+}
+
+function genStaticKeys$1 (keys) {
+  return makeMap(
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
+    (keys ? ',' + keys : '')
+  )
+}
+
+function markStatic$1 (node) {
+  node.static = isStatic(node);
+  if (node.type === 1) {
+    // do not make component slot content static. this avoids
+    // 1. components not able to mutate slot nodes
+    // 2. static slot content fails for hot-reloading
+    if (
+      !isPlatformReservedTag(node.tag) &&
+      node.tag !== 'slot' &&
+      node.attrsMap['inline-template'] == null
+    ) {
+      return
+    }
+    for (var i = 0, l = node.children.length; i < l; i++) {
+      var child = node.children[i];
+      markStatic$1(child);
+      if (!child.static) {
+        node.static = false;
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        var block = node.ifConditions[i$1].block;
+        markStatic$1(block);
+        if (!block.static) {
+          node.static = false;
+        }
+      }
+    }
+  }
+}
+
+function markStaticRoots (node, isInFor) {
+  if (node.type === 1) {
+    if (node.static || node.once) {
+      node.staticInFor = isInFor;
+    }
+    // For a node to qualify as a static root, it should have children that
+    // are not just static text. Otherwise the cost of hoisting out will
+    // outweigh the benefits and it's better off to just always render it fresh.
+    if (node.static && node.children.length && !(
+      node.children.length === 1 &&
+      node.children[0].type === 3
+    )) {
+      node.staticRoot = true;
+      return
+    } else {
+      node.staticRoot = false;
+    }
+    if (node.children) {
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        markStaticRoots(node.children[i], isInFor || !!node.for);
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        markStaticRoots(node.ifConditions[i$1].block, isInFor);
+      }
+    }
+  }
+}
+
+function isStatic (node) {
+  if (node.type === 2) { // expression
+    return false
+  }
+  if (node.type === 3) { // text
+    return true
+  }
+  return !!(node.pre || (
+    !node.hasBindings && // no dynamic bindings
+    !node.if && !node.for && // not v-if or v-for or v-else
+    !isBuiltInTag(node.tag) && // not a built-in
+    isPlatformReservedTag(node.tag) && // not a component
+    !isDirectChildOfTemplateFor(node) &&
+    Object.keys(node).every(isStaticKey)
+  ))
+}
+
+function isDirectChildOfTemplateFor (node) {
+  while (node.parent) {
+    node = node.parent;
+    if (node.tag !== 'template') {
+      return false
+    }
+    if (node.for) {
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+// KeyboardEvent.keyCode aliases
+var keyCodes = {
+  esc: 27,
+  tab: 9,
+  enter: 13,
+  space: 32,
+  up: 38,
+  left: 37,
+  right: 39,
+  down: 40,
+  'delete': [8, 46]
+};
+
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
+// #4868: modifiers that prevent the execution of the listener
+// need to explicitly return null so that we can determine whether to remove
+// the listener for .once
+var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+var modifierCode = {
+  stop: '$event.stopPropagation();',
+  prevent: '$event.preventDefault();',
+  self: genGuard("$event.target !== $event.currentTarget"),
+  ctrl: genGuard("!$event.ctrlKey"),
+  shift: genGuard("!$event.shiftKey"),
+  alt: genGuard("!$event.altKey"),
+  meta: genGuard("!$event.metaKey"),
+  left: genGuard("'button' in $event && $event.button !== 0"),
+  middle: genGuard("'button' in $event && $event.button !== 1"),
+  right: genGuard("'button' in $event && $event.button !== 2")
+};
+
+function genHandlers (
+  events,
+  isNative
+) {
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
+  for (var name in events) {
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
+  }
+}
+
+function genHandler (handler) {
+  if (!handler) {
+    return 'function(){}'
+  }
+
+  if (Array.isArray(handler)) {
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+  }
+
+  var isMethodPath = simplePathRE.test(handler.value);
+  var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+  if (!handler.modifiers) {
+    if (isMethodPath || isFunctionExpression) {
+      return handler.value
+    }
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+  } else {
+    var code = '';
+    var genModifierCode = '';
+    var keys = [];
+    for (var key in handler.modifiers) {
+      if (modifierCode[key]) {
+        genModifierCode += modifierCode[key];
+        // left/right
+        if (keyCodes[key]) {
+          keys.push(key);
+        }
+      } else if (key === 'exact') {
+        var modifiers = (handler.modifiers);
+        genModifierCode += genGuard(
+          ['ctrl', 'shift', 'alt', 'meta']
+            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+            .join('||')
+        );
+      } else {
+        keys.push(key);
+      }
+    }
+    if (keys.length) {
+      code += genKeyFilter(keys);
+    }
+    // Make sure modifiers like prevent and stop get executed after key filtering
+    if (genModifierCode) {
+      code += genModifierCode;
+    }
+    var handlerCode = isMethodPath
+      ? ("return " + (handler.value) + "($event)")
+      : isFunctionExpression
+        ? ("return (" + (handler.value) + ")($event)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
+    return ("function($event){" + code + handlerCode + "}")
+  }
+}
+
+function genKeyFilter (keys) {
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
+}
+
+function genFilterCode (key) {
+  var keyVal = parseInt(key, 10);
+  if (keyVal) {
+    return ("$event.keyCode!==" + keyVal)
+  }
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
+  return (
+    "_k($event.keyCode," +
+    (JSON.stringify(key)) + "," +
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
+  )
+}
+
+/*  */
+
+function on (el, dir) {
+  if (process.env.NODE_ENV !== 'production' && dir.modifiers) {
+    warn("v-on without argument does not support modifiers.");
+  }
+  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+}
+
+/*  */
+
+function bind$1 (el, dir) {
+  el.wrapData = function (code) {
+    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+  };
+}
+
+/*  */
+
+var baseDirectives = {
+  on: on,
+  bind: bind$1,
+  cloak: noop
+};
+
+/*  */
+
+
+
+
+
+var CodegenState = function CodegenState (options) {
+  this.options = options;
+  this.warn = options.warn || baseWarn;
+  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+  this.directives = extend(extend({}, baseDirectives), options.directives);
+  var isReservedTag = options.isReservedTag || no;
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+  this.onceId = 0;
+  this.staticRenderFns = [];
+  this.pre = false;
+};
+
+
+
+function generate (
+  ast,
+  options
+) {
+  var state = new CodegenState(options);
+  var code = ast ? genElement(ast, state) : '_c("div")';
+  return {
+    render: ("with(this){return " + code + "}"),
+    staticRenderFns: state.staticRenderFns
+  }
+}
+
+function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
+  if (el.staticRoot && !el.staticProcessed) {
+    return genStatic(el, state)
+  } else if (el.once && !el.onceProcessed) {
+    return genOnce(el, state)
+  } else if (el.for && !el.forProcessed) {
+    return genFor(el, state)
+  } else if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+    return genChildren(el, state) || 'void 0'
+  } else if (el.tag === 'slot') {
+    return genSlot(el, state)
+  } else {
+    // component or element
+    var code;
+    if (el.component) {
+      code = genComponent(el.component, el, state);
+    } else {
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
+
+      var children = el.inlineTemplate ? null : genChildren(el, state, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+    }
+    // module transforms
+    for (var i = 0; i < state.transforms.length; i++) {
+      code = state.transforms[i](el, code);
+    }
+    return code
+  }
+}
+
+// hoist static sub-trees out
+function genStatic (el, state) {
+  el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
+  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
+  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+}
+
+// v-once
+function genOnce (el, state) {
+  el.onceProcessed = true;
+  if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.staticInFor) {
+    var key = '';
+    var parent = el.parent;
+    while (parent) {
+      if (parent.for) {
+        key = parent.key;
+        break
+      }
+      parent = parent.parent;
+    }
+    if (!key) {
+      process.env.NODE_ENV !== 'production' && state.warn(
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
+      );
+      return genElement(el, state)
+    }
+    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+  } else {
+    return genStatic(el, state)
+  }
+}
+
+function genIf (
+  el,
+  state,
+  altGen,
+  altEmpty
+) {
+  el.ifProcessed = true; // avoid recursion
+  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+}
+
+function genIfConditions (
+  conditions,
+  state,
+  altGen,
+  altEmpty
+) {
+  if (!conditions.length) {
+    return altEmpty || '_e()'
+  }
+
+  var condition = conditions.shift();
+  if (condition.exp) {
+    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+  } else {
+    return ("" + (genTernaryExp(condition.block)))
+  }
+
+  // v-if with v-once should generate code like (a)?_m(0):_m(1)
+  function genTernaryExp (el) {
+    return altGen
+      ? altGen(el, state)
+      : el.once
+        ? genOnce(el, state)
+        : genElement(el, state)
+  }
+}
+
+function genFor (
+  el,
+  state,
+  altGen,
+  altHelper
+) {
+  var exp = el.for;
+  var alias = el.alias;
+  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+  if (process.env.NODE_ENV !== 'production' &&
+    state.maybeComponent(el) &&
+    el.tag !== 'slot' &&
+    el.tag !== 'template' &&
+    !el.key
+  ) {
+    state.warn(
+      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+      "v-for should have explicit keys. " +
+      "See https://vuejs.org/guide/list.html#key for more info.",
+      el.rawAttrsMap['v-for'],
+      true /* tip */
+    );
+  }
+
+  el.forProcessed = true; // avoid recursion
+  return (altHelper || '_l') + "((" + exp + ")," +
+    "function(" + alias + iterator1 + iterator2 + "){" +
+      "return " + ((altGen || genElement)(el, state)) +
+    '})'
+}
+
+function genData$2 (el, state) {
+  var data = '{';
+
+  // directives first.
+  // directives may mutate the el's other properties before they are generated.
+  var dirs = genDirectives(el, state);
+  if (dirs) { data += dirs + ','; }
+
+  // key
+  if (el.key) {
+    data += "key:" + (el.key) + ",";
+  }
+  // ref
+  if (el.ref) {
+    data += "ref:" + (el.ref) + ",";
+  }
+  if (el.refInFor) {
+    data += "refInFor:true,";
+  }
+  // pre
+  if (el.pre) {
+    data += "pre:true,";
+  }
+  // record original tag name for components using "is" attribute
+  if (el.component) {
+    data += "tag:\"" + (el.tag) + "\",";
+  }
+  // module data generation functions
+  for (var i = 0; i < state.dataGenFns.length; i++) {
+    data += state.dataGenFns[i](el);
+  }
+  // attributes
+  if (el.attrs) {
+    data += "attrs:" + (genProps(el.attrs)) + ",";
+  }
+  // DOM props
+  if (el.props) {
+    data += "domProps:" + (genProps(el.props)) + ",";
+  }
+  // event handlers
+  if (el.events) {
+    data += (genHandlers(el.events, false)) + ",";
+  }
+  if (el.nativeEvents) {
+    data += (genHandlers(el.nativeEvents, true)) + ",";
+  }
+  // slot target
+  // only for non-scoped slots
+  if (el.slotTarget && !el.slotScope) {
+    data += "slot:" + (el.slotTarget) + ",";
+  }
+  // scoped slots
+  if (el.scopedSlots) {
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+  }
+  // component v-model
+  if (el.model) {
+    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+  }
+  // inline-template
+  if (el.inlineTemplate) {
+    var inlineTemplate = genInlineTemplate(el, state);
+    if (inlineTemplate) {
+      data += inlineTemplate + ",";
+    }
+  }
+  data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
+  // v-bind data wrap
+  if (el.wrapData) {
+    data = el.wrapData(data);
+  }
+  // v-on data wrap
+  if (el.wrapListeners) {
+    data = el.wrapListeners(data);
+  }
+  return data
+}
+
+function genDirectives (el, state) {
+  var dirs = el.directives;
+  if (!dirs) { return }
+  var res = 'directives:[';
+  var hasRuntime = false;
+  var i, l, dir, needRuntime;
+  for (i = 0, l = dirs.length; i < l; i++) {
+    dir = dirs[i];
+    needRuntime = true;
+    var gen = state.directives[dir.name];
+    if (gen) {
+      // compile-time directive that manipulates AST.
+      // returns true if it also needs a runtime counterpart.
+      needRuntime = !!gen(el, dir, state.warn);
+    }
+    if (needRuntime) {
+      hasRuntime = true;
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+    }
+  }
+  if (hasRuntime) {
+    return res.slice(0, -1) + ']'
+  }
+}
+
+function genInlineTemplate (el, state) {
+  var ast = el.children[0];
+  if (process.env.NODE_ENV !== 'production' && (
+    el.children.length !== 1 || ast.type !== 1
+  )) {
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
+  }
+  if (ast && ast.type === 1) {
+    var inlineRenderFns = generate(ast, state.options);
+    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+  }
+}
+
+function genScopedSlots (
+  el,
+  slots,
+  state
+) {
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
+}
+
+function genScopedSlot (
+  el,
+  state
+) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
+  if (el.for && !el.forProcessed) {
+    return genFor(el, state, genScopedSlot)
+  }
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
+    "return " + (el.tag === 'template'
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+        : genChildren(el, state) || 'undefined'
+      : genElement(el, state)) + "}";
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+}
+
+function genChildren (
+  el,
+  state,
+  checkSkip,
+  altGenElement,
+  altGenNode
+) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+      el$1.for &&
+      el$1.tag !== 'template' &&
+      el$1.tag !== 'slot'
+    ) {
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
+    }
+    var normalizationType$1 = checkSkip
+      ? getNormalizationType(children, state.maybeComponent)
+      : 0;
+    var gen = altGenNode || genNode;
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
+  }
+}
+
+// determine the normalization needed for the children array.
+// 0: no normalization needed
+// 1: simple normalization needed (possible 1-level deep nested array)
+// 2: full normalization needed
+function getNormalizationType (
+  children,
+  maybeComponent
+) {
+  var res = 0;
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.type !== 1) {
+      continue
+    }
+    if (needsNormalization(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+      res = 2;
+      break
+    }
+    if (maybeComponent(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+      res = 1;
+    }
+  }
+  return res
+}
+
+function needsNormalization (el) {
+  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+}
+
+function genNode (node, state) {
+  if (node.type === 1) {
+    return genElement(node, state)
+  } else if (node.type === 3 && node.isComment) {
+    return genComment(node)
+  } else {
+    return genText(node)
+  }
+}
+
+function genText (text) {
+  return ("_v(" + (text.type === 2
+    ? text.expression // no need for () because already wrapped in _s()
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+}
+
+function genComment (comment) {
+  return ("_e(" + (JSON.stringify(comment.text)) + ")")
+}
+
+function genSlot (el, state) {
+  var slotName = el.slotName || '"default"';
+  var children = genChildren(el, state);
+  var res = "_t(" + slotName + (children ? ("," + children) : '');
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
+  var bind$$1 = el.attrsMap['v-bind'];
+  if ((attrs || bind$$1) && !children) {
+    res += ",null";
+  }
+  if (attrs) {
+    res += "," + attrs;
+  }
+  if (bind$$1) {
+    res += (attrs ? '' : ',null') + "," + bind$$1;
+  }
+  return res + ')'
+}
+
+// componentName is el.component, take it as argument to shun flow's pessimistic refinement
+function genComponent (
+  componentName,
+  el,
+  state
+) {
+  var children = el.inlineTemplate ? null : genChildren(el, state, true);
+  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+}
+
+function genProps (props) {
+  var staticProps = "";
+  var dynamicProps = "";
+  for (var i = 0; i < props.length; i++) {
+    var prop = props[i];
+    var value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
+    }
+  }
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
+}
+
+// #3895, #4268
+function transformSpecialNewlines (text) {
+  return text
+    .replace(/\u2028/g, '\\u2028')
+    .replace(/\u2029/g, '\\u2029')
+}
+
+/*  */
+
+
+
+// these keywords should not appear inside expressions, but operators like
+// typeof, instanceof and in are allowed
+var prohibitedKeywordRE = new RegExp('\\b' + (
+  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+  'super,throw,while,yield,delete,export,import,return,switch,default,' +
+  'extends,finally,continue,debugger,function,arguments'
+).split(',').join('\\b|\\b') + '\\b');
+
+// these unary operators should not be used as property/method names
+var unaryOperatorsRE = new RegExp('\\b' + (
+  'delete,typeof,void'
+).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+// strip strings in expressions
+var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+// detect problematic expressions in a template
+function detectErrors (ast, warn) {
+  if (ast) {
+    checkNode(ast, warn);
+  }
+}
+
+function checkNode (node, warn) {
+  if (node.type === 1) {
+    for (var name in node.attrsMap) {
+      if (dirRE.test(name)) {
+        var value = node.attrsMap[name];
+        if (value) {
+          var range = node.rawAttrsMap[name];
+          if (name === 'v-for') {
+            checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+          } else if (onRE.test(name)) {
+            checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+          } else {
+            checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+          }
+        }
+      }
+    }
+    if (node.children) {
+      for (var i = 0; i < node.children.length; i++) {
+        checkNode(node.children[i], warn);
+      }
+    }
+  } else if (node.type === 2) {
+    checkExpression(node.expression, node.text, warn, node);
+  }
+}
+
+function checkEvent (exp, text, warn, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
+      "avoid using JavaScript unary operator as property name: " +
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
+    );
+  }
+  checkExpression(exp, text, warn, range);
+}
+
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
+}
+
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  warn,
+  range
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident + "=_"));
+    } catch (e) {
+      warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+    }
+  }
+}
+
+function checkExpression (exp, text, warn, range) {
+  try {
+    new Function(("return " + exp));
+  } catch (e) {
+    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+    if (keywordMatch) {
+      warn(
+        "avoid using JavaScript keyword as property name: " +
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
+      );
+    } else {
+      warn(
+        "invalid expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
+      );
+    }
+  }
+}
+
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
+/*  */
+
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
+/*  */
+
+
+
+function createFunction (code, errors) {
+  try {
+    return new Function(code)
+  } catch (err) {
+    errors.push({ err: err, code: code });
+    return noop
+  }
+}
+
+function createCompileToFunctionFn (compile) {
+  var cache = Object.create(null);
+
+  return function compileToFunctions (
+    template,
+    options,
+    vm
+  ) {
+    options = extend({}, options);
+    var warn$$1 = options.warn || warn;
+    delete options.warn;
+
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production') {
+      // detect possible CSP restriction
+      try {
+        new Function('return 1');
+      } catch (e) {
+        if (e.toString().match(/unsafe-eval|CSP/)) {
+          warn$$1(
+            'It seems you are using the standalone build of Vue.js in an ' +
+            'environment with Content Security Policy that prohibits unsafe-eval. ' +
+            'The template compiler cannot work in this environment. Consider ' +
+            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+            'templates into render functions.'
+          );
+        }
+      }
+    }
+
+    // check cache
+    var key = options.delimiters
+      ? String(options.delimiters) + template
+      : template;
+    if (cache[key]) {
+      return cache[key]
+    }
+
+    // compile
+    var compiled = compile(template, options);
+
+    // check compilation errors/tips
+    if (process.env.NODE_ENV !== 'production') {
+      if (compiled.errors && compiled.errors.length) {
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
+      }
+      if (compiled.tips && compiled.tips.length) {
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
+      }
+    }
+
+    // turn code into functions
+    var res = {};
+    var fnGenErrors = [];
+    res.render = createFunction(compiled.render, fnGenErrors);
+    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+      return createFunction(code, fnGenErrors)
+    });
+
+    // check function generation errors.
+    // this should only happen if there is a bug in the compiler itself.
+    // mostly for codegen development use
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production') {
+      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+        warn$$1(
+          "Failed to generate render function:\n\n" +
+          fnGenErrors.map(function (ref) {
+            var err = ref.err;
+            var code = ref.code;
+
+            return ((err.toString()) + " in\n\n" + code + "\n");
+        }).join('\n'),
+          vm
+        );
+      }
+    }
+
+    return (cache[key] = res)
+  }
+}
+
+/*  */
+
+function createCompilerCreator (baseCompile) {
+  return function createCompiler (baseOptions) {
+    function compile (
+      template,
+      options
+    ) {
+      var finalOptions = Object.create(baseOptions);
+      var errors = [];
+      var tips = [];
+
+      var warn = function (msg, range, tip) {
+        (tip ? tips : errors).push(msg);
+      };
+
+      if (options) {
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
+        // merge custom modules
+        if (options.modules) {
+          finalOptions.modules =
+            (baseOptions.modules || []).concat(options.modules);
+        }
+        // merge custom directives
+        if (options.directives) {
+          finalOptions.directives = extend(
+            Object.create(baseOptions.directives || null),
+            options.directives
+          );
+        }
+        // copy other options
+        for (var key in options) {
+          if (key !== 'modules' && key !== 'directives') {
+            finalOptions[key] = options[key];
+          }
+        }
+      }
+
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
+      if (process.env.NODE_ENV !== 'production') {
+        detectErrors(compiled.ast, warn);
+      }
+      compiled.errors = errors;
+      compiled.tips = tips;
+      return compiled
+    }
+
+    return {
+      compile: compile,
+      compileToFunctions: createCompileToFunctionFn(compile)
+    }
+  }
+}
+
+/*  */
+
+// `createCompilerCreator` allows creating compilers that use alternative
+// parser/optimizer/codegen, e.g the SSR optimizing compiler.
+// Here we just export a default compiler using the default parts.
+var createCompiler = createCompilerCreator(function baseCompile (
+  template,
+  options
+) {
+  var ast = parse(template.trim(), options);
+  if (options.optimize !== false) {
+    optimize(ast, options);
+  }
+  var code = generate(ast, options);
+  return {
+    ast: ast,
+    render: code.render,
+    staticRenderFns: code.staticRenderFns
+  }
+});
+
+/*  */
+
+var ref$1 = createCompiler(baseOptions);
+var compile = ref$1.compile;
+var compileToFunctions = ref$1.compileToFunctions;
+
+/*  */
+
+// check whether current browser encodes a char inside attribute values
+var div;
+function getShouldDecode (href) {
+  div = div || document.createElement('div');
+  div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
+  return div.innerHTML.indexOf('&#10;') > 0
+}
+
+// #3663: IE encodes newlines inside attribute values while other browsers don't
+var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
+// #6828: chrome encodes content in a[href]
+var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+
+/*  */
+
+var idToTemplate = cached(function (id) {
+  var el = query(id);
+  return el && el.innerHTML
+});
+
+var mount = Vue.prototype.$mount;
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && query(el);
+
+  /* istanbul ignore if */
+  if (el === document.body || el === document.documentElement) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
+    );
+    return this
+  }
+
+  var options = this.$options;
+  // resolve template/el and convert to render function
+  if (!options.render) {
+    var template = options.template;
+    if (template) {
+      if (typeof template === 'string') {
+        if (template.charAt(0) === '#') {
+          template = idToTemplate(template);
+          /* istanbul ignore if */
+          if (process.env.NODE_ENV !== 'production' && !template) {
+            warn(
+              ("Template element not found or is empty: " + (options.template)),
+              this
+            );
+          }
+        }
+      } else if (template.nodeType) {
+        template = template.innerHTML;
+      } else {
+        if (process.env.NODE_ENV !== 'production') {
+          warn('invalid template option:' + template, this);
+        }
+        return this
+      }
+    } else if (el) {
+      template = getOuterHTML(el);
+    }
+    if (template) {
+      /* istanbul ignore if */
+      if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+        mark('compile');
+      }
+
+      var ref = compileToFunctions(template, {
+        outputSourceRange: process.env.NODE_ENV !== 'production',
+        shouldDecodeNewlines: shouldDecodeNewlines,
+        shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
+        delimiters: options.delimiters,
+        comments: options.comments
+      }, this);
+      var render = ref.render;
+      var staticRenderFns = ref.staticRenderFns;
+      options.render = render;
+      options.staticRenderFns = staticRenderFns;
+
+      /* istanbul ignore if */
+      if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+        mark('compile end');
+        measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+      }
+    }
+  }
+  return mount.call(this, el, hydrating)
+};
+
+/**
+ * Get outerHTML of elements, taking care
+ * of SVG elements in IE as well.
+ */
+function getOuterHTML (el) {
+  if (el.outerHTML) {
+    return el.outerHTML
+  } else {
+    var container = document.createElement('div');
+    container.appendChild(el.cloneNode(true));
+    return container.innerHTML
+  }
+}
+
+Vue.compile = compileToFunctions;
+
+export default Vue;

web/assets/[email protected]/vue.runtime.common.dev.js

@@ -0,0 +1,8423 @@
+/*!
+ * Vue.js v2.6.12
+ * (c) 2014-2020 Evan You
+ * Released under the MIT License.
+ */
+'use strict';
+
+/*  */
+
+var emptyObject = Object.freeze({});
+
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive.
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value, e.g., [object Object].
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert an input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if an attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array.
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
+    }
+  }
+}
+
+/**
+ * Check whether an object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
+ */
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
+    }
+  }
+  return res
+}
+
+/* eslint-disable no-unused-vars */
+
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+ */
+function noop (a, b, c) {}
+
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
+
+/* eslint-enable no-unused-vars */
+
+/**
+ * Return the same value.
+ */
+var identity = function (_) { return _; };
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured',
+  'serverPrefetch'
+];
+
+/*  */
+
+
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: "development" !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: "development" !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+{
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm;
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
+    }
+
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
+
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
+
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  if (!config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode) {
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    vnode.componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
+  cloned.isCloned = true;
+  return cloned
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
+ */
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
+
+/**
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatch updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through all properties and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive$$1(obj, keys[i]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment a target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment a target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    shouldObserve &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive$$1 (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if (customSetter) {
+        customSetter();
+      }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive$$1(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+{
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  var res = childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && "development" !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
+    }
+  }
+
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if (warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
+    observe(value);
+    toggleObserving(prevShouldObserve);
+  }
+  {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if (isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i]);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+
+  if (!valid) {
+    warn(
+      getInvalidTypeMessage(name, value, expectedTypes),
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+
+function assertType (value, type) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    valid = value instanceof type;
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  return match ? match[1] : ''
+}
+
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
+  }
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
+    }
+  }
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  var expectedValue = styleValue(value, expectedType);
+  var receivedValue = styleValue(value, receivedType);
+  // check if we need to specify expected value
+  if (expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      !isBoolean(expectedType, receivedType)) {
+    message += " with value " + expectedValue;
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + receivedValue + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+function isExplicable (value) {
+  var explicitTypes = ['string', 'number', 'boolean'];
+  return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
+          }
+        }
+      }
+    }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
+  }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+
+var isUsingMicroTask = false;
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  timerFunc = function () {
+    p.then(flushCallbacks);
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else {
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    timerFunc();
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+{
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' && isNative(Proxy);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+      if (!has && !isAllowed) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+var mark;
+var measure;
+
+{
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      // perf.clearMeasures(name)
+    };
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns, vm) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+      }
+    } else {
+      // return handler return value for single handlers
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  createOnceHandler,
+  vm
+) {
+  var name, def$$1, cur, old, event;
+  for (name in on) {
+    def$$1 = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    if (isUndef(cur)) {
+      warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      {
+        var keyInLowerCase = key.toLowerCase();
+        if (
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
+        ) {
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
+        }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
+    }
+  }
+  return res
+}
+
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
+        }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      }
+    });
+    toggleObserving(true);
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
+  }
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  if (!children || !children.length) {
+    return {}
+  }
+  var slots = {};
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    return res && (
+      res.length === 0 ||
+      (res.length === 1 && res[0].isComment) // #9658
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallback,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) { // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (!isObject(bindObject)) {
+        warn(
+          'slot v-bind without argument expects an Object',
+          this
+        );
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes = scopedSlotFn(props) || fallback;
+  } else {
+    nodes = this.$slots[name] || fallback;
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
+    }
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
+
+/*  */
+
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
+};
+
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  vnode, // we know it's MountedComponentVNode but flow doesn't
+  parent // activeInstance in lifecycle state
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (isDef(data) && isDef(data.nativeOn)) {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
+
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
+  {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  }
+}
+
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                "timeout (" + (res.timeout) + "ms)"
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
+  }
+}
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if (config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (!config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = expOrFn.toString();
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        try {
+          this.cb.call(this.vm, value, oldValue);
+        } catch (e) {
+          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+        }
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      }
+    }
+  }
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      try {
+        cb.call(vm, watcher.value);
+      } catch (error) {
+        handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
+      }
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+var uid$3 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$3++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
+    }
+
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
+        vm
+      );
+    }
+    /* istanbul ignore else */
+    {
+      initProxy(vm);
+    }
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
+
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    }
+
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = latest[key];
+    }
+  }
+  return modified
+}
+
+function Vue (options) {
+  if (!(this instanceof Vue)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if (name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
+    };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
+
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
+    }
+
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
+    }
+
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
+
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
+
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
+
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
+
+/*  */
+
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
+    ) {
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if (type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
+    };
+  });
+}
+
+/*  */
+
+
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var cachedNode = cache[key];
+    if (cachedNode) {
+      var name = getComponentName(cachedNode.componentOptions);
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var cached$$1 = cache[key];
+  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
+    cached$$1.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        cache[key] = vnode;
+        keys.push(key);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive$$1
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue);
+
+Object.defineProperty(Vue.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue.prototype, '$ssrContext', {
+  get: function get () {
+    /* istanbul ignore next */
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
+
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.12';
+
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!isDef(key)) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        a.asyncFactory === b.asyncFactory &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove$$1.listeners = listeners;
+    return remove$$1
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
+    }
+
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
+
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
+
+      if (data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
+
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
+
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setStyleScope(vnode.elm, i);
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
+    ) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
+        }
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        {
+          checkDuplicateKeys(ch);
+        }
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
+            }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
+                break
+              }
+              childNode = childNode.nextSibling;
+            }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
+        }
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
+        }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
+
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
+
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
+
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
+
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
+            } else {
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
+            }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
+        }
+
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
+            }
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
+                }
+              }
+            } else {
+              registerRef(ancestor);
+            }
+            ancestor = ancestor.parent;
+          }
+        }
+
+        // destroy old node
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
+        }
+      }
+    }
+
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
+    }
+  }
+
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
+    };
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
+    }
+  }
+
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
+
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
+    }
+  }
+}
+
+var emptyModifiers = Object.create(null);
+
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
+    }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
+
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+    }
+  }
+}
+
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur);
+    }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
+    }
+  }
+}
+
+function setAttr (el, key, value) {
+  if (el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
+    }
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, convertEnumeratedValue(key, value));
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
+    }
+  } else {
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
+    }
+    el.setAttribute(key, value);
+  }
+}
+
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
+
+/*  */
+
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
+
+  var cls = genClassForVnode(vnode);
+
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
+
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
+
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+function add$1 (
+  name,
+  handler,
+  capture,
+  passive
+) {
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
+  target$1.addEventListener(
+    name,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  name,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    name,
+    handler._wrapper || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+var svgContainer;
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (!(key in props)) {
+      elm[key] = '';
+    }
+  }
+
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
+    }
+
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
+    }
+  }
+}
+
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
+  }
+  return value !== newVal
+}
+
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
+
+/*  */
+
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+    }
+  });
+  return res
+});
+
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
+
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
+
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
+    }
+  }
+
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
+
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
+    }
+  }
+  return res
+}
+
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
+    }
+  }
+};
+
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+});
+
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
+    }
+  }
+}
+
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+var whitespaceRE = /\s+/;
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
+    }
+  }
+}
+
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
+    }
+    if (!el.classList.length) {
+      el.removeAttribute('class');
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
+    }
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
+    }
+  }
+}
+
+/*  */
+
+function resolveTransition (def$$1) {
+  if (!def$$1) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def$$1 === 'object') {
+    var res = {};
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
+    }
+    extend(res, def$$1);
+    return res
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
+  }
+}
+
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
+    }
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
+    }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
+
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
+    }
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
+    }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
+
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
+
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
+
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
+function toMs (s) {
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
+}
+
+/*  */
+
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
+
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    context = transitionNode.context;
+    transitionNode = transitionNode.parent;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if (explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
+    }
+    el._enterCb = null;
+  });
+
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
+    });
+  }
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      }
+    });
+  }
+
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if (isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show && el.parentNode) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
+      }
+    }
+  },
+
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
+        }
+      }
+    }
+  }
+};
+
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
+        }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (!value === !oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
+    }
+
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(isNotTextNode);
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
+
+    // warn multiple elements
+    if (children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if (mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
+
+// install platform patch function
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
+      console[console.info ? 'info' : 'log'](
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
+      );
+    }
+  }, 0);
+}
+
+/*  */
+
+module.exports = Vue;

web/assets/[email protected]/vue.runtime.common.js

@@ -0,0 +1,5 @@
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./vue.runtime.common.prod.js')
+} else {
+  module.exports = require('./vue.runtime.common.dev.js')
+}

web/assets/[email protected]/vue.runtime.esm.js

@@ -0,0 +1,8451 @@
+/*!
+ * Vue.js v2.6.12
+ * (c) 2014-2020 Evan You
+ * Released under the MIT License.
+ */
+/*  */
+
+var emptyObject = Object.freeze({});
+
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive.
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value, e.g., [object Object].
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert an input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if an attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array.
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
+    }
+  }
+}
+
+/**
+ * Check whether an object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
+ */
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
+    }
+  }
+  return res
+}
+
+/* eslint-disable no-unused-vars */
+
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+ */
+function noop (a, b, c) {}
+
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
+
+/* eslint-enable no-unused-vars */
+
+/**
+ * Return the same value.
+ */
+var identity = function (_) { return _; };
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured',
+  'serverPrefetch'
+];
+
+/*  */
+
+
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: process.env.NODE_ENV !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: process.env.NODE_ENV !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+if (process.env.NODE_ENV !== 'production') {
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm;
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
+    }
+
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
+
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
+
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode) {
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    vnode.componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
+  cloned.isCloned = true;
+  return cloned
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
+ */
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
+
+/**
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatch updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through all properties and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive$$1(obj, keys[i]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment a target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment a target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    shouldObserve &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive$$1 (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if (process.env.NODE_ENV !== 'production' && customSetter) {
+        customSetter();
+      }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive$$1(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+if (process.env.NODE_ENV !== 'production') {
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      process.env.NODE_ENV !== 'production' && warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  var res = childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    process.env.NODE_ENV !== 'production' && assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  if (process.env.NODE_ENV !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && process.env.NODE_ENV !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else if (process.env.NODE_ENV !== 'production') {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else if (process.env.NODE_ENV !== 'production') {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else if (process.env.NODE_ENV !== 'production') {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  if (process.env.NODE_ENV !== 'production') {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
+    }
+  }
+
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
+    observe(value);
+    toggleObserving(prevShouldObserve);
+  }
+  if (
+    process.env.NODE_ENV !== 'production' &&
+    // skip validation for weex recycle-list child component props
+    !(false)
+  ) {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if (process.env.NODE_ENV !== 'production' && isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i]);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+
+  if (!valid) {
+    warn(
+      getInvalidTypeMessage(name, value, expectedTypes),
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+
+function assertType (value, type) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    valid = value instanceof type;
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  return match ? match[1] : ''
+}
+
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
+  }
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
+    }
+  }
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  var expectedValue = styleValue(value, expectedType);
+  var receivedValue = styleValue(value, receivedType);
+  // check if we need to specify expected value
+  if (expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      !isBoolean(expectedType, receivedType)) {
+    message += " with value " + expectedValue;
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + receivedValue + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+function isExplicable (value) {
+  var explicitTypes = ['string', 'number', 'boolean'];
+  return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
+          }
+        }
+      }
+    }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
+  }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  if (process.env.NODE_ENV !== 'production') {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+
+var isUsingMicroTask = false;
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  timerFunc = function () {
+    p.then(flushCallbacks);
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else {
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    timerFunc();
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+if (process.env.NODE_ENV !== 'production') {
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' && isNative(Proxy);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+      if (!has && !isAllowed) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+var mark;
+var measure;
+
+if (process.env.NODE_ENV !== 'production') {
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      // perf.clearMeasures(name)
+    };
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns, vm) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+      }
+    } else {
+      // return handler return value for single handlers
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  createOnceHandler,
+  vm
+) {
+  var name, def$$1, cur, old, event;
+  for (name in on) {
+    def$$1 = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    if (isUndef(cur)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      if (process.env.NODE_ENV !== 'production') {
+        var keyInLowerCase = key.toLowerCase();
+        if (
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
+        ) {
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
+        }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
+    }
+  }
+  return res
+}
+
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
+        }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production') {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      } else {
+        defineReactive$$1(vm, key, result[key]);
+      }
+    });
+    toggleObserving(true);
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else if (process.env.NODE_ENV !== 'production') {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
+  }
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  if (!children || !children.length) {
+    return {}
+  }
+  var slots = {};
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    return res && (
+      res.length === 0 ||
+      (res.length === 1 && res[0].isComment) // #9658
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallback,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) { // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
+        warn(
+          'slot v-bind without argument expects an Object',
+          this
+        );
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes = scopedSlotFn(props) || fallback;
+  } else {
+    nodes = this.$slots[name] || fallback;
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
+    }
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
+
+/*  */
+
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  if (process.env.NODE_ENV !== 'production') {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
+};
+
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    if (process.env.NODE_ENV !== 'production') {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  vnode, // we know it's MountedComponentVNode but flow doesn't
+  parent // activeInstance in lifecycle state
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (process.env.NODE_ENV !== 'production' &&
+    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.nativeOn)) {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
+
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
+  if (process.env.NODE_ENV !== 'production') {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  } else {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, null, true);
+  }
+}
+
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production' && vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                process.env.NODE_ENV !== 'production'
+                  ? ("timeout (" + (res.timeout) + "ms)")
+                  : null
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    if (process.env.NODE_ENV !== 'production') {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
+  }
+}
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    if (process.env.NODE_ENV !== 'production') {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  if (process.env.NODE_ENV !== 'production') {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (process.env.NODE_ENV !== 'production' && !config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = process.env.NODE_ENV !== 'production'
+    ? expOrFn.toString()
+    : '';
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        try {
+          this.cb.call(this.vm, value, oldValue);
+        } catch (e) {
+          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+        }
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    } else {
+      defineReactive$$1(props, key, value);
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    process.env.NODE_ENV !== 'production' && warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    if (process.env.NODE_ENV !== 'production') {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (process.env.NODE_ENV !== 'production' && getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else if (process.env.NODE_ENV !== 'production') {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      }
+    }
+  }
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (process.env.NODE_ENV !== 'production' &&
+      sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  if (process.env.NODE_ENV !== 'production') {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      try {
+        cb.call(vm, watcher.value);
+      } catch (error) {
+        handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
+      }
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+var uid$3 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$3++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
+    }
+
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
+        vm
+      );
+    }
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      initProxy(vm);
+    } else {
+      vm._renderProxy = vm;
+    }
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
+
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    }
+
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = latest[key];
+    }
+  }
+  return modified
+}
+
+function Vue (options) {
+  if (process.env.NODE_ENV !== 'production' &&
+    !(this instanceof Vue)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if (process.env.NODE_ENV !== 'production' && name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
+    };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
+
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
+    }
+
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
+    }
+
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
+
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
+
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
+
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
+
+/*  */
+
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
+    ) {
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if (process.env.NODE_ENV !== 'production' && type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
+    };
+  });
+}
+
+/*  */
+
+
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var cachedNode = cache[key];
+    if (cachedNode) {
+      var name = getComponentName(cachedNode.componentOptions);
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var cached$$1 = cache[key];
+  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
+    cached$$1.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        cache[key] = vnode;
+        keys.push(key);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  if (process.env.NODE_ENV !== 'production') {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive$$1
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue);
+
+Object.defineProperty(Vue.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue.prototype, '$ssrContext', {
+  get: function get () {
+    /* istanbul ignore next */
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
+
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.12';
+
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!isDef(key)) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        a.asyncFactory === b.asyncFactory &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove$$1.listeners = listeners;
+    return remove$$1
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
+    }
+
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      if (process.env.NODE_ENV !== 'production') {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
+
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
+
+      if (process.env.NODE_ENV !== 'production' && data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
+
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
+
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      if (process.env.NODE_ENV !== 'production') {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setStyleScope(vnode.elm, i);
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
+    ) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
+        }
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    if (process.env.NODE_ENV !== 'production') {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkDuplicateKeys(ch);
+        }
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    if (process.env.NODE_ENV !== 'production') {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if (process.env.NODE_ENV !== 'production' &&
+                typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
+            }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
+                break
+              }
+              childNode = childNode.nextSibling;
+            }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if (process.env.NODE_ENV !== 'production' &&
+                typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
+        }
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
+        }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
+
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
+
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
+
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
+
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
+            } else if (process.env.NODE_ENV !== 'production') {
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
+            }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
+        }
+
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
+            }
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
+                }
+              }
+            } else {
+              registerRef(ancestor);
+            }
+            ancestor = ancestor.parent;
+          }
+        }
+
+        // destroy old node
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
+        }
+      }
+    }
+
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
+    }
+  }
+
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
+    };
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
+    }
+  }
+
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
+
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
+    }
+  }
+}
+
+var emptyModifiers = Object.create(null);
+
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
+    }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
+
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+    }
+  }
+}
+
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur);
+    }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
+    }
+  }
+}
+
+function setAttr (el, key, value) {
+  if (el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
+    }
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, convertEnumeratedValue(key, value));
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
+    }
+  } else {
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
+    }
+    el.setAttribute(key, value);
+  }
+}
+
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
+
+/*  */
+
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
+
+  var cls = genClassForVnode(vnode);
+
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
+
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
+
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+function add$1 (
+  name,
+  handler,
+  capture,
+  passive
+) {
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
+  target$1.addEventListener(
+    name,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  name,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    name,
+    handler._wrapper || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+var svgContainer;
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (!(key in props)) {
+      elm[key] = '';
+    }
+  }
+
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
+    }
+
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
+    }
+  }
+}
+
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
+  }
+  return value !== newVal
+}
+
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
+
+/*  */
+
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+    }
+  });
+  return res
+});
+
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
+
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
+
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
+    }
+  }
+
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
+
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
+    }
+  }
+  return res
+}
+
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
+    }
+  }
+};
+
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+});
+
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
+    }
+  }
+}
+
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+var whitespaceRE = /\s+/;
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
+    }
+  }
+}
+
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
+    }
+    if (!el.classList.length) {
+      el.removeAttribute('class');
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
+    }
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
+    }
+  }
+}
+
+/*  */
+
+function resolveTransition (def$$1) {
+  if (!def$$1) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def$$1 === 'object') {
+    var res = {};
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
+    }
+    extend(res, def$$1);
+    return res
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
+  }
+}
+
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
+    }
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
+    }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
+
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
+    }
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
+    }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
+
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
+
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
+
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
+function toMs (s) {
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
+}
+
+/*  */
+
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
+
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    context = transitionNode.context;
+    transitionNode = transitionNode.parent;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if (process.env.NODE_ENV !== 'production' && explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
+    }
+    el._enterCb = null;
+  });
+
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
+    });
+  }
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      }
+    });
+  }
+
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if (process.env.NODE_ENV !== 'production' && isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show && el.parentNode) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
+      }
+    }
+  },
+
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
+        }
+      }
+    }
+  }
+};
+
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
+        }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (!value === !oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
+    }
+
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(isNotTextNode);
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
+
+    // warn multiple elements
+    if (process.env.NODE_ENV !== 'production' && children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if (process.env.NODE_ENV !== 'production' &&
+      mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else if (process.env.NODE_ENV !== 'production') {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
+
+// install platform patch function
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else if (
+        process.env.NODE_ENV !== 'production' &&
+        process.env.NODE_ENV !== 'test'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (process.env.NODE_ENV !== 'production' &&
+      process.env.NODE_ENV !== 'test' &&
+      config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
+      console[console.info ? 'info' : 'log'](
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
+      );
+    }
+  }, 0);
+}
+
+/*  */
+
+export default Vue;

web/assets/[email protected]/vue.runtime.js

@@ -0,0 +1,8429 @@
+/*!
+ * Vue.js v2.6.12
+ * (c) 2014-2020 Evan You
+ * Released under the MIT License.
+ */
+(function (global, factory) {
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = global || self, global.Vue = factory());
+}(this, function () { 'use strict';
+
+  /*  */
+
+  var emptyObject = Object.freeze({});
+
+  // These helpers produce better VM code in JS engines due to their
+  // explicitness and function inlining.
+  function isUndef (v) {
+    return v === undefined || v === null
+  }
+
+  function isDef (v) {
+    return v !== undefined && v !== null
+  }
+
+  function isTrue (v) {
+    return v === true
+  }
+
+  function isFalse (v) {
+    return v === false
+  }
+
+  /**
+   * Check if value is primitive.
+   */
+  function isPrimitive (value) {
+    return (
+      typeof value === 'string' ||
+      typeof value === 'number' ||
+      // $flow-disable-line
+      typeof value === 'symbol' ||
+      typeof value === 'boolean'
+    )
+  }
+
+  /**
+   * Quick object check - this is primarily used to tell
+   * Objects from primitive values when we know the value
+   * is a JSON-compliant type.
+   */
+  function isObject (obj) {
+    return obj !== null && typeof obj === 'object'
+  }
+
+  /**
+   * Get the raw type string of a value, e.g., [object Object].
+   */
+  var _toString = Object.prototype.toString;
+
+  function toRawType (value) {
+    return _toString.call(value).slice(8, -1)
+  }
+
+  /**
+   * Strict object type check. Only returns true
+   * for plain JavaScript objects.
+   */
+  function isPlainObject (obj) {
+    return _toString.call(obj) === '[object Object]'
+  }
+
+  function isRegExp (v) {
+    return _toString.call(v) === '[object RegExp]'
+  }
+
+  /**
+   * Check if val is a valid array index.
+   */
+  function isValidArrayIndex (val) {
+    var n = parseFloat(String(val));
+    return n >= 0 && Math.floor(n) === n && isFinite(val)
+  }
+
+  function isPromise (val) {
+    return (
+      isDef(val) &&
+      typeof val.then === 'function' &&
+      typeof val.catch === 'function'
+    )
+  }
+
+  /**
+   * Convert a value to a string that is actually rendered.
+   */
+  function toString (val) {
+    return val == null
+      ? ''
+      : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+        ? JSON.stringify(val, null, 2)
+        : String(val)
+  }
+
+  /**
+   * Convert an input value to a number for persistence.
+   * If the conversion fails, return original string.
+   */
+  function toNumber (val) {
+    var n = parseFloat(val);
+    return isNaN(n) ? val : n
+  }
+
+  /**
+   * Make a map and return a function for checking if a key
+   * is in that map.
+   */
+  function makeMap (
+    str,
+    expectsLowerCase
+  ) {
+    var map = Object.create(null);
+    var list = str.split(',');
+    for (var i = 0; i < list.length; i++) {
+      map[list[i]] = true;
+    }
+    return expectsLowerCase
+      ? function (val) { return map[val.toLowerCase()]; }
+      : function (val) { return map[val]; }
+  }
+
+  /**
+   * Check if a tag is a built-in tag.
+   */
+  var isBuiltInTag = makeMap('slot,component', true);
+
+  /**
+   * Check if an attribute is a reserved attribute.
+   */
+  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+  /**
+   * Remove an item from an array.
+   */
+  function remove (arr, item) {
+    if (arr.length) {
+      var index = arr.indexOf(item);
+      if (index > -1) {
+        return arr.splice(index, 1)
+      }
+    }
+  }
+
+  /**
+   * Check whether an object has the property.
+   */
+  var hasOwnProperty = Object.prototype.hasOwnProperty;
+  function hasOwn (obj, key) {
+    return hasOwnProperty.call(obj, key)
+  }
+
+  /**
+   * Create a cached version of a pure function.
+   */
+  function cached (fn) {
+    var cache = Object.create(null);
+    return (function cachedFn (str) {
+      var hit = cache[str];
+      return hit || (cache[str] = fn(str))
+    })
+  }
+
+  /**
+   * Camelize a hyphen-delimited string.
+   */
+  var camelizeRE = /-(\w)/g;
+  var camelize = cached(function (str) {
+    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+  });
+
+  /**
+   * Capitalize a string.
+   */
+  var capitalize = cached(function (str) {
+    return str.charAt(0).toUpperCase() + str.slice(1)
+  });
+
+  /**
+   * Hyphenate a camelCase string.
+   */
+  var hyphenateRE = /\B([A-Z])/g;
+  var hyphenate = cached(function (str) {
+    return str.replace(hyphenateRE, '-$1').toLowerCase()
+  });
+
+  /**
+   * Simple bind polyfill for environments that do not support it,
+   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+   * since native bind is now performant enough in most browsers.
+   * But removing it would mean breaking code that was able to run in
+   * PhantomJS 1.x, so this must be kept for backward compatibility.
+   */
+
+  /* istanbul ignore next */
+  function polyfillBind (fn, ctx) {
+    function boundFn (a) {
+      var l = arguments.length;
+      return l
+        ? l > 1
+          ? fn.apply(ctx, arguments)
+          : fn.call(ctx, a)
+        : fn.call(ctx)
+    }
+
+    boundFn._length = fn.length;
+    return boundFn
+  }
+
+  function nativeBind (fn, ctx) {
+    return fn.bind(ctx)
+  }
+
+  var bind = Function.prototype.bind
+    ? nativeBind
+    : polyfillBind;
+
+  /**
+   * Convert an Array-like object to a real Array.
+   */
+  function toArray (list, start) {
+    start = start || 0;
+    var i = list.length - start;
+    var ret = new Array(i);
+    while (i--) {
+      ret[i] = list[i + start];
+    }
+    return ret
+  }
+
+  /**
+   * Mix properties into target object.
+   */
+  function extend (to, _from) {
+    for (var key in _from) {
+      to[key] = _from[key];
+    }
+    return to
+  }
+
+  /**
+   * Merge an Array of Objects into a single Object.
+   */
+  function toObject (arr) {
+    var res = {};
+    for (var i = 0; i < arr.length; i++) {
+      if (arr[i]) {
+        extend(res, arr[i]);
+      }
+    }
+    return res
+  }
+
+  /* eslint-disable no-unused-vars */
+
+  /**
+   * Perform no operation.
+   * Stubbing args to make Flow happy without leaving useless transpiled code
+   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+   */
+  function noop (a, b, c) {}
+
+  /**
+   * Always return false.
+   */
+  var no = function (a, b, c) { return false; };
+
+  /* eslint-enable no-unused-vars */
+
+  /**
+   * Return the same value.
+   */
+  var identity = function (_) { return _; };
+
+  /**
+   * Check if two values are loosely equal - that is,
+   * if they are plain objects, do they have the same shape?
+   */
+  function looseEqual (a, b) {
+    if (a === b) { return true }
+    var isObjectA = isObject(a);
+    var isObjectB = isObject(b);
+    if (isObjectA && isObjectB) {
+      try {
+        var isArrayA = Array.isArray(a);
+        var isArrayB = Array.isArray(b);
+        if (isArrayA && isArrayB) {
+          return a.length === b.length && a.every(function (e, i) {
+            return looseEqual(e, b[i])
+          })
+        } else if (a instanceof Date && b instanceof Date) {
+          return a.getTime() === b.getTime()
+        } else if (!isArrayA && !isArrayB) {
+          var keysA = Object.keys(a);
+          var keysB = Object.keys(b);
+          return keysA.length === keysB.length && keysA.every(function (key) {
+            return looseEqual(a[key], b[key])
+          })
+        } else {
+          /* istanbul ignore next */
+          return false
+        }
+      } catch (e) {
+        /* istanbul ignore next */
+        return false
+      }
+    } else if (!isObjectA && !isObjectB) {
+      return String(a) === String(b)
+    } else {
+      return false
+    }
+  }
+
+  /**
+   * Return the first index at which a loosely equal value can be
+   * found in the array (if value is a plain object, the array must
+   * contain an object of the same shape), or -1 if it is not present.
+   */
+  function looseIndexOf (arr, val) {
+    for (var i = 0; i < arr.length; i++) {
+      if (looseEqual(arr[i], val)) { return i }
+    }
+    return -1
+  }
+
+  /**
+   * Ensure a function is called only once.
+   */
+  function once (fn) {
+    var called = false;
+    return function () {
+      if (!called) {
+        called = true;
+        fn.apply(this, arguments);
+      }
+    }
+  }
+
+  var SSR_ATTR = 'data-server-rendered';
+
+  var ASSET_TYPES = [
+    'component',
+    'directive',
+    'filter'
+  ];
+
+  var LIFECYCLE_HOOKS = [
+    'beforeCreate',
+    'created',
+    'beforeMount',
+    'mounted',
+    'beforeUpdate',
+    'updated',
+    'beforeDestroy',
+    'destroyed',
+    'activated',
+    'deactivated',
+    'errorCaptured',
+    'serverPrefetch'
+  ];
+
+  /*  */
+
+
+
+  var config = ({
+    /**
+     * Option merge strategies (used in core/util/options)
+     */
+    // $flow-disable-line
+    optionMergeStrategies: Object.create(null),
+
+    /**
+     * Whether to suppress warnings.
+     */
+    silent: false,
+
+    /**
+     * Show production mode tip message on boot?
+     */
+    productionTip: "development" !== 'production',
+
+    /**
+     * Whether to enable devtools
+     */
+    devtools: "development" !== 'production',
+
+    /**
+     * Whether to record perf
+     */
+    performance: false,
+
+    /**
+     * Error handler for watcher errors
+     */
+    errorHandler: null,
+
+    /**
+     * Warn handler for watcher warns
+     */
+    warnHandler: null,
+
+    /**
+     * Ignore certain custom elements
+     */
+    ignoredElements: [],
+
+    /**
+     * Custom user key aliases for v-on
+     */
+    // $flow-disable-line
+    keyCodes: Object.create(null),
+
+    /**
+     * Check if a tag is reserved so that it cannot be registered as a
+     * component. This is platform-dependent and may be overwritten.
+     */
+    isReservedTag: no,
+
+    /**
+     * Check if an attribute is reserved so that it cannot be used as a component
+     * prop. This is platform-dependent and may be overwritten.
+     */
+    isReservedAttr: no,
+
+    /**
+     * Check if a tag is an unknown element.
+     * Platform-dependent.
+     */
+    isUnknownElement: no,
+
+    /**
+     * Get the namespace of an element
+     */
+    getTagNamespace: noop,
+
+    /**
+     * Parse the real tag name for the specific platform.
+     */
+    parsePlatformTagName: identity,
+
+    /**
+     * Check if an attribute must be bound using property, e.g. value
+     * Platform-dependent.
+     */
+    mustUseProp: no,
+
+    /**
+     * Perform updates asynchronously. Intended to be used by Vue Test Utils
+     * This will significantly reduce performance if set to false.
+     */
+    async: true,
+
+    /**
+     * Exposed for legacy reasons
+     */
+    _lifecycleHooks: LIFECYCLE_HOOKS
+  });
+
+  /*  */
+
+  /**
+   * unicode letters used for parsing html tags, component names and property paths.
+   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+   */
+  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+  /**
+   * Check if a string starts with $ or _
+   */
+  function isReserved (str) {
+    var c = (str + '').charCodeAt(0);
+    return c === 0x24 || c === 0x5F
+  }
+
+  /**
+   * Define a property.
+   */
+  function def (obj, key, val, enumerable) {
+    Object.defineProperty(obj, key, {
+      value: val,
+      enumerable: !!enumerable,
+      writable: true,
+      configurable: true
+    });
+  }
+
+  /**
+   * Parse simple path.
+   */
+  var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+  function parsePath (path) {
+    if (bailRE.test(path)) {
+      return
+    }
+    var segments = path.split('.');
+    return function (obj) {
+      for (var i = 0; i < segments.length; i++) {
+        if (!obj) { return }
+        obj = obj[segments[i]];
+      }
+      return obj
+    }
+  }
+
+  /*  */
+
+  // can we use __proto__?
+  var hasProto = '__proto__' in {};
+
+  // Browser environment sniffing
+  var inBrowser = typeof window !== 'undefined';
+  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+  var isIE = UA && /msie|trident/.test(UA);
+  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+  var isEdge = UA && UA.indexOf('edge/') > 0;
+  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  var isPhantomJS = UA && /phantomjs/.test(UA);
+  var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+  // Firefox has a "watch" function on Object.prototype...
+  var nativeWatch = ({}).watch;
+
+  var supportsPassive = false;
+  if (inBrowser) {
+    try {
+      var opts = {};
+      Object.defineProperty(opts, 'passive', ({
+        get: function get () {
+          /* istanbul ignore next */
+          supportsPassive = true;
+        }
+      })); // https://github.com/facebook/flow/issues/285
+      window.addEventListener('test-passive', null, opts);
+    } catch (e) {}
+  }
+
+  // this needs to be lazy-evaled because vue may be required before
+  // vue-server-renderer can set VUE_ENV
+  var _isServer;
+  var isServerRendering = function () {
+    if (_isServer === undefined) {
+      /* istanbul ignore if */
+      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+        // detect presence of vue-server-renderer and avoid
+        // Webpack shimming the process
+        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+      } else {
+        _isServer = false;
+      }
+    }
+    return _isServer
+  };
+
+  // detect devtools
+  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+  /* istanbul ignore next */
+  function isNative (Ctor) {
+    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+  }
+
+  var hasSymbol =
+    typeof Symbol !== 'undefined' && isNative(Symbol) &&
+    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+  var _Set;
+  /* istanbul ignore if */ // $flow-disable-line
+  if (typeof Set !== 'undefined' && isNative(Set)) {
+    // use native Set when available.
+    _Set = Set;
+  } else {
+    // a non-standard Set polyfill that only works with primitive keys.
+    _Set = /*@__PURE__*/(function () {
+      function Set () {
+        this.set = Object.create(null);
+      }
+      Set.prototype.has = function has (key) {
+        return this.set[key] === true
+      };
+      Set.prototype.add = function add (key) {
+        this.set[key] = true;
+      };
+      Set.prototype.clear = function clear () {
+        this.set = Object.create(null);
+      };
+
+      return Set;
+    }());
+  }
+
+  /*  */
+
+  var warn = noop;
+  var tip = noop;
+  var generateComponentTrace = (noop); // work around flow check
+  var formatComponentName = (noop);
+
+  {
+    var hasConsole = typeof console !== 'undefined';
+    var classifyRE = /(?:^|[-_])(\w)/g;
+    var classify = function (str) { return str
+      .replace(classifyRE, function (c) { return c.toUpperCase(); })
+      .replace(/[-_]/g, ''); };
+
+    warn = function (msg, vm) {
+      var trace = vm ? generateComponentTrace(vm) : '';
+
+      if (config.warnHandler) {
+        config.warnHandler.call(null, msg, vm, trace);
+      } else if (hasConsole && (!config.silent)) {
+        console.error(("[Vue warn]: " + msg + trace));
+      }
+    };
+
+    tip = function (msg, vm) {
+      if (hasConsole && (!config.silent)) {
+        console.warn("[Vue tip]: " + msg + (
+          vm ? generateComponentTrace(vm) : ''
+        ));
+      }
+    };
+
+    formatComponentName = function (vm, includeFile) {
+      if (vm.$root === vm) {
+        return '<Root>'
+      }
+      var options = typeof vm === 'function' && vm.cid != null
+        ? vm.options
+        : vm._isVue
+          ? vm.$options || vm.constructor.options
+          : vm;
+      var name = options.name || options._componentTag;
+      var file = options.__file;
+      if (!name && file) {
+        var match = file.match(/([^/\\]+)\.vue$/);
+        name = match && match[1];
+      }
+
+      return (
+        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+        (file && includeFile !== false ? (" at " + file) : '')
+      )
+    };
+
+    var repeat = function (str, n) {
+      var res = '';
+      while (n) {
+        if (n % 2 === 1) { res += str; }
+        if (n > 1) { str += str; }
+        n >>= 1;
+      }
+      return res
+    };
+
+    generateComponentTrace = function (vm) {
+      if (vm._isVue && vm.$parent) {
+        var tree = [];
+        var currentRecursiveSequence = 0;
+        while (vm) {
+          if (tree.length > 0) {
+            var last = tree[tree.length - 1];
+            if (last.constructor === vm.constructor) {
+              currentRecursiveSequence++;
+              vm = vm.$parent;
+              continue
+            } else if (currentRecursiveSequence > 0) {
+              tree[tree.length - 1] = [last, currentRecursiveSequence];
+              currentRecursiveSequence = 0;
+            }
+          }
+          tree.push(vm);
+          vm = vm.$parent;
+        }
+        return '\n\nfound in\n\n' + tree
+          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+              : formatComponentName(vm))); })
+          .join('\n')
+      } else {
+        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+      }
+    };
+  }
+
+  /*  */
+
+  var uid = 0;
+
+  /**
+   * A dep is an observable that can have multiple
+   * directives subscribing to it.
+   */
+  var Dep = function Dep () {
+    this.id = uid++;
+    this.subs = [];
+  };
+
+  Dep.prototype.addSub = function addSub (sub) {
+    this.subs.push(sub);
+  };
+
+  Dep.prototype.removeSub = function removeSub (sub) {
+    remove(this.subs, sub);
+  };
+
+  Dep.prototype.depend = function depend () {
+    if (Dep.target) {
+      Dep.target.addDep(this);
+    }
+  };
+
+  Dep.prototype.notify = function notify () {
+    // stabilize the subscriber list first
+    var subs = this.subs.slice();
+    if (!config.async) {
+      // subs aren't sorted in scheduler if not running async
+      // we need to sort them now to make sure they fire in correct
+      // order
+      subs.sort(function (a, b) { return a.id - b.id; });
+    }
+    for (var i = 0, l = subs.length; i < l; i++) {
+      subs[i].update();
+    }
+  };
+
+  // The current target watcher being evaluated.
+  // This is globally unique because only one watcher
+  // can be evaluated at a time.
+  Dep.target = null;
+  var targetStack = [];
+
+  function pushTarget (target) {
+    targetStack.push(target);
+    Dep.target = target;
+  }
+
+  function popTarget () {
+    targetStack.pop();
+    Dep.target = targetStack[targetStack.length - 1];
+  }
+
+  /*  */
+
+  var VNode = function VNode (
+    tag,
+    data,
+    children,
+    text,
+    elm,
+    context,
+    componentOptions,
+    asyncFactory
+  ) {
+    this.tag = tag;
+    this.data = data;
+    this.children = children;
+    this.text = text;
+    this.elm = elm;
+    this.ns = undefined;
+    this.context = context;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
+    this.key = data && data.key;
+    this.componentOptions = componentOptions;
+    this.componentInstance = undefined;
+    this.parent = undefined;
+    this.raw = false;
+    this.isStatic = false;
+    this.isRootInsert = true;
+    this.isComment = false;
+    this.isCloned = false;
+    this.isOnce = false;
+    this.asyncFactory = asyncFactory;
+    this.asyncMeta = undefined;
+    this.isAsyncPlaceholder = false;
+  };
+
+  var prototypeAccessors = { child: { configurable: true } };
+
+  // DEPRECATED: alias for componentInstance for backwards compat.
+  /* istanbul ignore next */
+  prototypeAccessors.child.get = function () {
+    return this.componentInstance
+  };
+
+  Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+  var createEmptyVNode = function (text) {
+    if ( text === void 0 ) text = '';
+
+    var node = new VNode();
+    node.text = text;
+    node.isComment = true;
+    return node
+  };
+
+  function createTextVNode (val) {
+    return new VNode(undefined, undefined, undefined, String(val))
+  }
+
+  // optimized shallow clone
+  // used for static nodes and slot nodes because they may be reused across
+  // multiple renders, cloning them avoids errors when DOM manipulations rely
+  // on their elm reference.
+  function cloneVNode (vnode) {
+    var cloned = new VNode(
+      vnode.tag,
+      vnode.data,
+      // #7975
+      // clone children array to avoid mutating original in case of cloning
+      // a child.
+      vnode.children && vnode.children.slice(),
+      vnode.text,
+      vnode.elm,
+      vnode.context,
+      vnode.componentOptions,
+      vnode.asyncFactory
+    );
+    cloned.ns = vnode.ns;
+    cloned.isStatic = vnode.isStatic;
+    cloned.key = vnode.key;
+    cloned.isComment = vnode.isComment;
+    cloned.fnContext = vnode.fnContext;
+    cloned.fnOptions = vnode.fnOptions;
+    cloned.fnScopeId = vnode.fnScopeId;
+    cloned.asyncMeta = vnode.asyncMeta;
+    cloned.isCloned = true;
+    return cloned
+  }
+
+  /*
+   * not type checking this file because flow doesn't play well with
+   * dynamically accessing methods on Array prototype
+   */
+
+  var arrayProto = Array.prototype;
+  var arrayMethods = Object.create(arrayProto);
+
+  var methodsToPatch = [
+    'push',
+    'pop',
+    'shift',
+    'unshift',
+    'splice',
+    'sort',
+    'reverse'
+  ];
+
+  /**
+   * Intercept mutating methods and emit events
+   */
+  methodsToPatch.forEach(function (method) {
+    // cache original method
+    var original = arrayProto[method];
+    def(arrayMethods, method, function mutator () {
+      var args = [], len = arguments.length;
+      while ( len-- ) args[ len ] = arguments[ len ];
+
+      var result = original.apply(this, args);
+      var ob = this.__ob__;
+      var inserted;
+      switch (method) {
+        case 'push':
+        case 'unshift':
+          inserted = args;
+          break
+        case 'splice':
+          inserted = args.slice(2);
+          break
+      }
+      if (inserted) { ob.observeArray(inserted); }
+      // notify change
+      ob.dep.notify();
+      return result
+    });
+  });
+
+  /*  */
+
+  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+  /**
+   * In some cases we may want to disable observation inside a component's
+   * update computation.
+   */
+  var shouldObserve = true;
+
+  function toggleObserving (value) {
+    shouldObserve = value;
+  }
+
+  /**
+   * Observer class that is attached to each observed
+   * object. Once attached, the observer converts the target
+   * object's property keys into getter/setters that
+   * collect dependencies and dispatch updates.
+   */
+  var Observer = function Observer (value) {
+    this.value = value;
+    this.dep = new Dep();
+    this.vmCount = 0;
+    def(value, '__ob__', this);
+    if (Array.isArray(value)) {
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
+      } else {
+        copyAugment(value, arrayMethods, arrayKeys);
+      }
+      this.observeArray(value);
+    } else {
+      this.walk(value);
+    }
+  };
+
+  /**
+   * Walk through all properties and convert them into
+   * getter/setters. This method should only be called when
+   * value type is Object.
+   */
+  Observer.prototype.walk = function walk (obj) {
+    var keys = Object.keys(obj);
+    for (var i = 0; i < keys.length; i++) {
+      defineReactive$$1(obj, keys[i]);
+    }
+  };
+
+  /**
+   * Observe a list of Array items.
+   */
+  Observer.prototype.observeArray = function observeArray (items) {
+    for (var i = 0, l = items.length; i < l; i++) {
+      observe(items[i]);
+    }
+  };
+
+  // helpers
+
+  /**
+   * Augment a target Object or Array by intercepting
+   * the prototype chain using __proto__
+   */
+  function protoAugment (target, src) {
+    /* eslint-disable no-proto */
+    target.__proto__ = src;
+    /* eslint-enable no-proto */
+  }
+
+  /**
+   * Augment a target Object or Array by defining
+   * hidden properties.
+   */
+  /* istanbul ignore next */
+  function copyAugment (target, src, keys) {
+    for (var i = 0, l = keys.length; i < l; i++) {
+      var key = keys[i];
+      def(target, key, src[key]);
+    }
+  }
+
+  /**
+   * Attempt to create an observer instance for a value,
+   * returns the new observer if successfully observed,
+   * or the existing observer if the value already has one.
+   */
+  function observe (value, asRootData) {
+    if (!isObject(value) || value instanceof VNode) {
+      return
+    }
+    var ob;
+    if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+      ob = value.__ob__;
+    } else if (
+      shouldObserve &&
+      !isServerRendering() &&
+      (Array.isArray(value) || isPlainObject(value)) &&
+      Object.isExtensible(value) &&
+      !value._isVue
+    ) {
+      ob = new Observer(value);
+    }
+    if (asRootData && ob) {
+      ob.vmCount++;
+    }
+    return ob
+  }
+
+  /**
+   * Define a reactive property on an Object.
+   */
+  function defineReactive$$1 (
+    obj,
+    key,
+    val,
+    customSetter,
+    shallow
+  ) {
+    var dep = new Dep();
+
+    var property = Object.getOwnPropertyDescriptor(obj, key);
+    if (property && property.configurable === false) {
+      return
+    }
+
+    // cater for pre-defined getter/setters
+    var getter = property && property.get;
+    var setter = property && property.set;
+    if ((!getter || setter) && arguments.length === 2) {
+      val = obj[key];
+    }
+
+    var childOb = !shallow && observe(val);
+    Object.defineProperty(obj, key, {
+      enumerable: true,
+      configurable: true,
+      get: function reactiveGetter () {
+        var value = getter ? getter.call(obj) : val;
+        if (Dep.target) {
+          dep.depend();
+          if (childOb) {
+            childOb.dep.depend();
+            if (Array.isArray(value)) {
+              dependArray(value);
+            }
+          }
+        }
+        return value
+      },
+      set: function reactiveSetter (newVal) {
+        var value = getter ? getter.call(obj) : val;
+        /* eslint-disable no-self-compare */
+        if (newVal === value || (newVal !== newVal && value !== value)) {
+          return
+        }
+        /* eslint-enable no-self-compare */
+        if (customSetter) {
+          customSetter();
+        }
+        // #7981: for accessor properties without setter
+        if (getter && !setter) { return }
+        if (setter) {
+          setter.call(obj, newVal);
+        } else {
+          val = newVal;
+        }
+        childOb = !shallow && observe(newVal);
+        dep.notify();
+      }
+    });
+  }
+
+  /**
+   * Set a property on an object. Adds the new property and
+   * triggers change notification if the property doesn't
+   * already exist.
+   */
+  function set (target, key, val) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.length = Math.max(target.length, key);
+      target.splice(key, 1, val);
+      return val
+    }
+    if (key in target && !(key in Object.prototype)) {
+      target[key] = val;
+      return val
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid adding reactive properties to a Vue instance or its root $data ' +
+        'at runtime - declare it upfront in the data option.'
+      );
+      return val
+    }
+    if (!ob) {
+      target[key] = val;
+      return val
+    }
+    defineReactive$$1(ob.value, key, val);
+    ob.dep.notify();
+    return val
+  }
+
+  /**
+   * Delete a property and trigger change if necessary.
+   */
+  function del (target, key) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.splice(key, 1);
+      return
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid deleting properties on a Vue instance or its root $data ' +
+        '- just set it to null.'
+      );
+      return
+    }
+    if (!hasOwn(target, key)) {
+      return
+    }
+    delete target[key];
+    if (!ob) {
+      return
+    }
+    ob.dep.notify();
+  }
+
+  /**
+   * Collect dependencies on array elements when the array is touched, since
+   * we cannot intercept array element access like property getters.
+   */
+  function dependArray (value) {
+    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+      e = value[i];
+      e && e.__ob__ && e.__ob__.dep.depend();
+      if (Array.isArray(e)) {
+        dependArray(e);
+      }
+    }
+  }
+
+  /*  */
+
+  /**
+   * Option overwriting strategies are functions that handle
+   * how to merge a parent option value and a child option
+   * value into the final value.
+   */
+  var strats = config.optionMergeStrategies;
+
+  /**
+   * Options with restrictions
+   */
+  {
+    strats.el = strats.propsData = function (parent, child, vm, key) {
+      if (!vm) {
+        warn(
+          "option \"" + key + "\" can only be used during instance " +
+          'creation with the `new` keyword.'
+        );
+      }
+      return defaultStrat(parent, child)
+    };
+  }
+
+  /**
+   * Helper that recursively merges two data objects together.
+   */
+  function mergeData (to, from) {
+    if (!from) { return to }
+    var key, toVal, fromVal;
+
+    var keys = hasSymbol
+      ? Reflect.ownKeys(from)
+      : Object.keys(from);
+
+    for (var i = 0; i < keys.length; i++) {
+      key = keys[i];
+      // in case the object is already observed...
+      if (key === '__ob__') { continue }
+      toVal = to[key];
+      fromVal = from[key];
+      if (!hasOwn(to, key)) {
+        set(to, key, fromVal);
+      } else if (
+        toVal !== fromVal &&
+        isPlainObject(toVal) &&
+        isPlainObject(fromVal)
+      ) {
+        mergeData(toVal, fromVal);
+      }
+    }
+    return to
+  }
+
+  /**
+   * Data
+   */
+  function mergeDataOrFn (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      // in a Vue.extend merge, both should be functions
+      if (!childVal) {
+        return parentVal
+      }
+      if (!parentVal) {
+        return childVal
+      }
+      // when parentVal & childVal are both present,
+      // we need to return a function that returns the
+      // merged result of both functions... no need to
+      // check if parentVal is a function here because
+      // it has to be a function to pass previous merges.
+      return function mergedDataFn () {
+        return mergeData(
+          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+        )
+      }
+    } else {
+      return function mergedInstanceDataFn () {
+        // instance merge
+        var instanceData = typeof childVal === 'function'
+          ? childVal.call(vm, vm)
+          : childVal;
+        var defaultData = typeof parentVal === 'function'
+          ? parentVal.call(vm, vm)
+          : parentVal;
+        if (instanceData) {
+          return mergeData(instanceData, defaultData)
+        } else {
+          return defaultData
+        }
+      }
+    }
+  }
+
+  strats.data = function (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      if (childVal && typeof childVal !== 'function') {
+        warn(
+          'The "data" option should be a function ' +
+          'that returns a per-instance value in component ' +
+          'definitions.',
+          vm
+        );
+
+        return parentVal
+      }
+      return mergeDataOrFn(parentVal, childVal)
+    }
+
+    return mergeDataOrFn(parentVal, childVal, vm)
+  };
+
+  /**
+   * Hooks and props are merged as arrays.
+   */
+  function mergeHook (
+    parentVal,
+    childVal
+  ) {
+    var res = childVal
+      ? parentVal
+        ? parentVal.concat(childVal)
+        : Array.isArray(childVal)
+          ? childVal
+          : [childVal]
+      : parentVal;
+    return res
+      ? dedupeHooks(res)
+      : res
+  }
+
+  function dedupeHooks (hooks) {
+    var res = [];
+    for (var i = 0; i < hooks.length; i++) {
+      if (res.indexOf(hooks[i]) === -1) {
+        res.push(hooks[i]);
+      }
+    }
+    return res
+  }
+
+  LIFECYCLE_HOOKS.forEach(function (hook) {
+    strats[hook] = mergeHook;
+  });
+
+  /**
+   * Assets
+   *
+   * When a vm is present (instance creation), we need to do
+   * a three-way merge between constructor options, instance
+   * options and parent options.
+   */
+  function mergeAssets (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    var res = Object.create(parentVal || null);
+    if (childVal) {
+      assertObjectType(key, childVal, vm);
+      return extend(res, childVal)
+    } else {
+      return res
+    }
+  }
+
+  ASSET_TYPES.forEach(function (type) {
+    strats[type + 's'] = mergeAssets;
+  });
+
+  /**
+   * Watchers.
+   *
+   * Watchers hashes should not overwrite one
+   * another, so we merge them as arrays.
+   */
+  strats.watch = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    // work around Firefox's Object.prototype.watch...
+    if (parentVal === nativeWatch) { parentVal = undefined; }
+    if (childVal === nativeWatch) { childVal = undefined; }
+    /* istanbul ignore if */
+    if (!childVal) { return Object.create(parentVal || null) }
+    {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = {};
+    extend(ret, parentVal);
+    for (var key$1 in childVal) {
+      var parent = ret[key$1];
+      var child = childVal[key$1];
+      if (parent && !Array.isArray(parent)) {
+        parent = [parent];
+      }
+      ret[key$1] = parent
+        ? parent.concat(child)
+        : Array.isArray(child) ? child : [child];
+    }
+    return ret
+  };
+
+  /**
+   * Other object hashes.
+   */
+  strats.props =
+  strats.methods =
+  strats.inject =
+  strats.computed = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    if (childVal && "development" !== 'production') {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = Object.create(null);
+    extend(ret, parentVal);
+    if (childVal) { extend(ret, childVal); }
+    return ret
+  };
+  strats.provide = mergeDataOrFn;
+
+  /**
+   * Default strategy.
+   */
+  var defaultStrat = function (parentVal, childVal) {
+    return childVal === undefined
+      ? parentVal
+      : childVal
+  };
+
+  /**
+   * Validate component names
+   */
+  function checkComponents (options) {
+    for (var key in options.components) {
+      validateComponentName(key);
+    }
+  }
+
+  function validateComponentName (name) {
+    if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+      warn(
+        'Invalid component name: "' + name + '". Component names ' +
+        'should conform to valid custom element name in html5 specification.'
+      );
+    }
+    if (isBuiltInTag(name) || config.isReservedTag(name)) {
+      warn(
+        'Do not use built-in or reserved HTML elements as component ' +
+        'id: ' + name
+      );
+    }
+  }
+
+  /**
+   * Ensure all props option syntax are normalized into the
+   * Object-based format.
+   */
+  function normalizeProps (options, vm) {
+    var props = options.props;
+    if (!props) { return }
+    var res = {};
+    var i, val, name;
+    if (Array.isArray(props)) {
+      i = props.length;
+      while (i--) {
+        val = props[i];
+        if (typeof val === 'string') {
+          name = camelize(val);
+          res[name] = { type: null };
+        } else {
+          warn('props must be strings when using array syntax.');
+        }
+      }
+    } else if (isPlainObject(props)) {
+      for (var key in props) {
+        val = props[key];
+        name = camelize(key);
+        res[name] = isPlainObject(val)
+          ? val
+          : { type: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"props\": expected an Array or an Object, " +
+        "but got " + (toRawType(props)) + ".",
+        vm
+      );
+    }
+    options.props = res;
+  }
+
+  /**
+   * Normalize all injections into Object-based format
+   */
+  function normalizeInject (options, vm) {
+    var inject = options.inject;
+    if (!inject) { return }
+    var normalized = options.inject = {};
+    if (Array.isArray(inject)) {
+      for (var i = 0; i < inject.length; i++) {
+        normalized[inject[i]] = { from: inject[i] };
+      }
+    } else if (isPlainObject(inject)) {
+      for (var key in inject) {
+        var val = inject[key];
+        normalized[key] = isPlainObject(val)
+          ? extend({ from: key }, val)
+          : { from: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"inject\": expected an Array or an Object, " +
+        "but got " + (toRawType(inject)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Normalize raw function directives into object format.
+   */
+  function normalizeDirectives (options) {
+    var dirs = options.directives;
+    if (dirs) {
+      for (var key in dirs) {
+        var def$$1 = dirs[key];
+        if (typeof def$$1 === 'function') {
+          dirs[key] = { bind: def$$1, update: def$$1 };
+        }
+      }
+    }
+  }
+
+  function assertObjectType (name, value, vm) {
+    if (!isPlainObject(value)) {
+      warn(
+        "Invalid value for option \"" + name + "\": expected an Object, " +
+        "but got " + (toRawType(value)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Merge two option objects into a new one.
+   * Core utility used in both instantiation and inheritance.
+   */
+  function mergeOptions (
+    parent,
+    child,
+    vm
+  ) {
+    {
+      checkComponents(child);
+    }
+
+    if (typeof child === 'function') {
+      child = child.options;
+    }
+
+    normalizeProps(child, vm);
+    normalizeInject(child, vm);
+    normalizeDirectives(child);
+
+    // Apply extends and mixins on the child options,
+    // but only if it is a raw options object that isn't
+    // the result of another mergeOptions call.
+    // Only merged options has the _base property.
+    if (!child._base) {
+      if (child.extends) {
+        parent = mergeOptions(parent, child.extends, vm);
+      }
+      if (child.mixins) {
+        for (var i = 0, l = child.mixins.length; i < l; i++) {
+          parent = mergeOptions(parent, child.mixins[i], vm);
+        }
+      }
+    }
+
+    var options = {};
+    var key;
+    for (key in parent) {
+      mergeField(key);
+    }
+    for (key in child) {
+      if (!hasOwn(parent, key)) {
+        mergeField(key);
+      }
+    }
+    function mergeField (key) {
+      var strat = strats[key] || defaultStrat;
+      options[key] = strat(parent[key], child[key], vm, key);
+    }
+    return options
+  }
+
+  /**
+   * Resolve an asset.
+   * This function is used because child instances need access
+   * to assets defined in its ancestor chain.
+   */
+  function resolveAsset (
+    options,
+    type,
+    id,
+    warnMissing
+  ) {
+    /* istanbul ignore if */
+    if (typeof id !== 'string') {
+      return
+    }
+    var assets = options[type];
+    // check local registration variations first
+    if (hasOwn(assets, id)) { return assets[id] }
+    var camelizedId = camelize(id);
+    if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+    var PascalCaseId = capitalize(camelizedId);
+    if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+    // fallback to prototype chain
+    var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+    if (warnMissing && !res) {
+      warn(
+        'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+        options
+      );
+    }
+    return res
+  }
+
+  /*  */
+
+
+
+  function validateProp (
+    key,
+    propOptions,
+    propsData,
+    vm
+  ) {
+    var prop = propOptions[key];
+    var absent = !hasOwn(propsData, key);
+    var value = propsData[key];
+    // boolean casting
+    var booleanIndex = getTypeIndex(Boolean, prop.type);
+    if (booleanIndex > -1) {
+      if (absent && !hasOwn(prop, 'default')) {
+        value = false;
+      } else if (value === '' || value === hyphenate(key)) {
+        // only cast empty string / same name to boolean if
+        // boolean has higher priority
+        var stringIndex = getTypeIndex(String, prop.type);
+        if (stringIndex < 0 || booleanIndex < stringIndex) {
+          value = true;
+        }
+      }
+    }
+    // check default value
+    if (value === undefined) {
+      value = getPropDefaultValue(vm, prop, key);
+      // since the default value is a fresh copy,
+      // make sure to observe it.
+      var prevShouldObserve = shouldObserve;
+      toggleObserving(true);
+      observe(value);
+      toggleObserving(prevShouldObserve);
+    }
+    {
+      assertProp(prop, key, value, vm, absent);
+    }
+    return value
+  }
+
+  /**
+   * Get the default value of a prop.
+   */
+  function getPropDefaultValue (vm, prop, key) {
+    // no default, return undefined
+    if (!hasOwn(prop, 'default')) {
+      return undefined
+    }
+    var def = prop.default;
+    // warn against non-factory defaults for Object & Array
+    if (isObject(def)) {
+      warn(
+        'Invalid default value for prop "' + key + '": ' +
+        'Props with type Object/Array must use a factory function ' +
+        'to return the default value.',
+        vm
+      );
+    }
+    // the raw prop value was also undefined from previous render,
+    // return previous default value to avoid unnecessary watcher trigger
+    if (vm && vm.$options.propsData &&
+      vm.$options.propsData[key] === undefined &&
+      vm._props[key] !== undefined
+    ) {
+      return vm._props[key]
+    }
+    // call factory function for non-Function types
+    // a value is Function if its prototype is function even across different execution context
+    return typeof def === 'function' && getType(prop.type) !== 'Function'
+      ? def.call(vm)
+      : def
+  }
+
+  /**
+   * Assert whether a prop is valid.
+   */
+  function assertProp (
+    prop,
+    name,
+    value,
+    vm,
+    absent
+  ) {
+    if (prop.required && absent) {
+      warn(
+        'Missing required prop: "' + name + '"',
+        vm
+      );
+      return
+    }
+    if (value == null && !prop.required) {
+      return
+    }
+    var type = prop.type;
+    var valid = !type || type === true;
+    var expectedTypes = [];
+    if (type) {
+      if (!Array.isArray(type)) {
+        type = [type];
+      }
+      for (var i = 0; i < type.length && !valid; i++) {
+        var assertedType = assertType(value, type[i]);
+        expectedTypes.push(assertedType.expectedType || '');
+        valid = assertedType.valid;
+      }
+    }
+
+    if (!valid) {
+      warn(
+        getInvalidTypeMessage(name, value, expectedTypes),
+        vm
+      );
+      return
+    }
+    var validator = prop.validator;
+    if (validator) {
+      if (!validator(value)) {
+        warn(
+          'Invalid prop: custom validator check failed for prop "' + name + '".',
+          vm
+        );
+      }
+    }
+  }
+
+  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+
+  function assertType (value, type) {
+    var valid;
+    var expectedType = getType(type);
+    if (simpleCheckRE.test(expectedType)) {
+      var t = typeof value;
+      valid = t === expectedType.toLowerCase();
+      // for primitive wrapper objects
+      if (!valid && t === 'object') {
+        valid = value instanceof type;
+      }
+    } else if (expectedType === 'Object') {
+      valid = isPlainObject(value);
+    } else if (expectedType === 'Array') {
+      valid = Array.isArray(value);
+    } else {
+      valid = value instanceof type;
+    }
+    return {
+      valid: valid,
+      expectedType: expectedType
+    }
+  }
+
+  /**
+   * Use function string name to check built-in types,
+   * because a simple equality check will fail when running
+   * across different vms / iframes.
+   */
+  function getType (fn) {
+    var match = fn && fn.toString().match(/^\s*function (\w+)/);
+    return match ? match[1] : ''
+  }
+
+  function isSameType (a, b) {
+    return getType(a) === getType(b)
+  }
+
+  function getTypeIndex (type, expectedTypes) {
+    if (!Array.isArray(expectedTypes)) {
+      return isSameType(expectedTypes, type) ? 0 : -1
+    }
+    for (var i = 0, len = expectedTypes.length; i < len; i++) {
+      if (isSameType(expectedTypes[i], type)) {
+        return i
+      }
+    }
+    return -1
+  }
+
+  function getInvalidTypeMessage (name, value, expectedTypes) {
+    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+      " Expected " + (expectedTypes.map(capitalize).join(', '));
+    var expectedType = expectedTypes[0];
+    var receivedType = toRawType(value);
+    var expectedValue = styleValue(value, expectedType);
+    var receivedValue = styleValue(value, receivedType);
+    // check if we need to specify expected value
+    if (expectedTypes.length === 1 &&
+        isExplicable(expectedType) &&
+        !isBoolean(expectedType, receivedType)) {
+      message += " with value " + expectedValue;
+    }
+    message += ", got " + receivedType + " ";
+    // check if we need to specify received value
+    if (isExplicable(receivedType)) {
+      message += "with value " + receivedValue + ".";
+    }
+    return message
+  }
+
+  function styleValue (value, type) {
+    if (type === 'String') {
+      return ("\"" + value + "\"")
+    } else if (type === 'Number') {
+      return ("" + (Number(value)))
+    } else {
+      return ("" + value)
+    }
+  }
+
+  function isExplicable (value) {
+    var explicitTypes = ['string', 'number', 'boolean'];
+    return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
+  }
+
+  function isBoolean () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+  }
+
+  /*  */
+
+  function handleError (err, vm, info) {
+    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+    // See: https://github.com/vuejs/vuex/issues/1505
+    pushTarget();
+    try {
+      if (vm) {
+        var cur = vm;
+        while ((cur = cur.$parent)) {
+          var hooks = cur.$options.errorCaptured;
+          if (hooks) {
+            for (var i = 0; i < hooks.length; i++) {
+              try {
+                var capture = hooks[i].call(cur, err, vm, info) === false;
+                if (capture) { return }
+              } catch (e) {
+                globalHandleError(e, cur, 'errorCaptured hook');
+              }
+            }
+          }
+        }
+      }
+      globalHandleError(err, vm, info);
+    } finally {
+      popTarget();
+    }
+  }
+
+  function invokeWithErrorHandling (
+    handler,
+    context,
+    args,
+    vm,
+    info
+  ) {
+    var res;
+    try {
+      res = args ? handler.apply(context, args) : handler.call(context);
+      if (res && !res._isVue && isPromise(res) && !res._handled) {
+        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+        // issue #9511
+        // avoid catch triggering multiple times when nested calls
+        res._handled = true;
+      }
+    } catch (e) {
+      handleError(e, vm, info);
+    }
+    return res
+  }
+
+  function globalHandleError (err, vm, info) {
+    if (config.errorHandler) {
+      try {
+        return config.errorHandler.call(null, err, vm, info)
+      } catch (e) {
+        // if the user intentionally throws the original error in the handler,
+        // do not log it twice
+        if (e !== err) {
+          logError(e, null, 'config.errorHandler');
+        }
+      }
+    }
+    logError(err, vm, info);
+  }
+
+  function logError (err, vm, info) {
+    {
+      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+    }
+    /* istanbul ignore else */
+    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+      console.error(err);
+    } else {
+      throw err
+    }
+  }
+
+  /*  */
+
+  var isUsingMicroTask = false;
+
+  var callbacks = [];
+  var pending = false;
+
+  function flushCallbacks () {
+    pending = false;
+    var copies = callbacks.slice(0);
+    callbacks.length = 0;
+    for (var i = 0; i < copies.length; i++) {
+      copies[i]();
+    }
+  }
+
+  // Here we have async deferring wrappers using microtasks.
+  // In 2.5 we used (macro) tasks (in combination with microtasks).
+  // However, it has subtle problems when state is changed right before repaint
+  // (e.g. #6813, out-in transitions).
+  // Also, using (macro) tasks in event handler would cause some weird behaviors
+  // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+  // So we now use microtasks everywhere, again.
+  // A major drawback of this tradeoff is that there are some scenarios
+  // where microtasks have too high a priority and fire in between supposedly
+  // sequential events (e.g. #4521, #6690, which have workarounds)
+  // or even between bubbling of the same event (#6566).
+  var timerFunc;
+
+  // The nextTick behavior leverages the microtask queue, which can be accessed
+  // via either native Promise.then or MutationObserver.
+  // MutationObserver has wider support, however it is seriously bugged in
+  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+  // completely stops working after triggering a few times... so, if native
+  // Promise is available, we will use it:
+  /* istanbul ignore next, $flow-disable-line */
+  if (typeof Promise !== 'undefined' && isNative(Promise)) {
+    var p = Promise.resolve();
+    timerFunc = function () {
+      p.then(flushCallbacks);
+      // In problematic UIWebViews, Promise.then doesn't completely break, but
+      // it can get stuck in a weird state where callbacks are pushed into the
+      // microtask queue but the queue isn't being flushed, until the browser
+      // needs to do some other work, e.g. handle a timer. Therefore we can
+      // "force" the microtask queue to be flushed by adding an empty timer.
+      if (isIOS) { setTimeout(noop); }
+    };
+    isUsingMicroTask = true;
+  } else if (!isIE && typeof MutationObserver !== 'undefined' && (
+    isNative(MutationObserver) ||
+    // PhantomJS and iOS 7.x
+    MutationObserver.toString() === '[object MutationObserverConstructor]'
+  )) {
+    // Use MutationObserver where native Promise is not available,
+    // e.g. PhantomJS, iOS7, Android 4.4
+    // (#6466 MutationObserver is unreliable in IE11)
+    var counter = 1;
+    var observer = new MutationObserver(flushCallbacks);
+    var textNode = document.createTextNode(String(counter));
+    observer.observe(textNode, {
+      characterData: true
+    });
+    timerFunc = function () {
+      counter = (counter + 1) % 2;
+      textNode.data = String(counter);
+    };
+    isUsingMicroTask = true;
+  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+    // Fallback to setImmediate.
+    // Technically it leverages the (macro) task queue,
+    // but it is still a better choice than setTimeout.
+    timerFunc = function () {
+      setImmediate(flushCallbacks);
+    };
+  } else {
+    // Fallback to setTimeout.
+    timerFunc = function () {
+      setTimeout(flushCallbacks, 0);
+    };
+  }
+
+  function nextTick (cb, ctx) {
+    var _resolve;
+    callbacks.push(function () {
+      if (cb) {
+        try {
+          cb.call(ctx);
+        } catch (e) {
+          handleError(e, ctx, 'nextTick');
+        }
+      } else if (_resolve) {
+        _resolve(ctx);
+      }
+    });
+    if (!pending) {
+      pending = true;
+      timerFunc();
+    }
+    // $flow-disable-line
+    if (!cb && typeof Promise !== 'undefined') {
+      return new Promise(function (resolve) {
+        _resolve = resolve;
+      })
+    }
+  }
+
+  /*  */
+
+  /* not type checking this file because flow doesn't play well with Proxy */
+
+  var initProxy;
+
+  {
+    var allowedGlobals = makeMap(
+      'Infinity,undefined,NaN,isFinite,isNaN,' +
+      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+      'require' // for Webpack/Browserify
+    );
+
+    var warnNonPresent = function (target, key) {
+      warn(
+        "Property or method \"" + key + "\" is not defined on the instance but " +
+        'referenced during render. Make sure that this property is reactive, ' +
+        'either in the data option, or for class-based components, by ' +
+        'initializing the property. ' +
+        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+        target
+      );
+    };
+
+    var warnReservedPrefix = function (target, key) {
+      warn(
+        "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+        'prevent conflicts with Vue internals. ' +
+        'See: https://vuejs.org/v2/api/#data',
+        target
+      );
+    };
+
+    var hasProxy =
+      typeof Proxy !== 'undefined' && isNative(Proxy);
+
+    if (hasProxy) {
+      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+      config.keyCodes = new Proxy(config.keyCodes, {
+        set: function set (target, key, value) {
+          if (isBuiltInModifier(key)) {
+            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+            return false
+          } else {
+            target[key] = value;
+            return true
+          }
+        }
+      });
+    }
+
+    var hasHandler = {
+      has: function has (target, key) {
+        var has = key in target;
+        var isAllowed = allowedGlobals(key) ||
+          (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+        if (!has && !isAllowed) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return has || !isAllowed
+      }
+    };
+
+    var getHandler = {
+      get: function get (target, key) {
+        if (typeof key === 'string' && !(key in target)) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return target[key]
+      }
+    };
+
+    initProxy = function initProxy (vm) {
+      if (hasProxy) {
+        // determine which proxy handler to use
+        var options = vm.$options;
+        var handlers = options.render && options.render._withStripped
+          ? getHandler
+          : hasHandler;
+        vm._renderProxy = new Proxy(vm, handlers);
+      } else {
+        vm._renderProxy = vm;
+      }
+    };
+  }
+
+  /*  */
+
+  var seenObjects = new _Set();
+
+  /**
+   * Recursively traverse an object to evoke all converted
+   * getters, so that every nested property inside the object
+   * is collected as a "deep" dependency.
+   */
+  function traverse (val) {
+    _traverse(val, seenObjects);
+    seenObjects.clear();
+  }
+
+  function _traverse (val, seen) {
+    var i, keys;
+    var isA = Array.isArray(val);
+    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+      return
+    }
+    if (val.__ob__) {
+      var depId = val.__ob__.dep.id;
+      if (seen.has(depId)) {
+        return
+      }
+      seen.add(depId);
+    }
+    if (isA) {
+      i = val.length;
+      while (i--) { _traverse(val[i], seen); }
+    } else {
+      keys = Object.keys(val);
+      i = keys.length;
+      while (i--) { _traverse(val[keys[i]], seen); }
+    }
+  }
+
+  var mark;
+  var measure;
+
+  {
+    var perf = inBrowser && window.performance;
+    /* istanbul ignore if */
+    if (
+      perf &&
+      perf.mark &&
+      perf.measure &&
+      perf.clearMarks &&
+      perf.clearMeasures
+    ) {
+      mark = function (tag) { return perf.mark(tag); };
+      measure = function (name, startTag, endTag) {
+        perf.measure(name, startTag, endTag);
+        perf.clearMarks(startTag);
+        perf.clearMarks(endTag);
+        // perf.clearMeasures(name)
+      };
+    }
+  }
+
+  /*  */
+
+  var normalizeEvent = cached(function (name) {
+    var passive = name.charAt(0) === '&';
+    name = passive ? name.slice(1) : name;
+    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+    name = once$$1 ? name.slice(1) : name;
+    var capture = name.charAt(0) === '!';
+    name = capture ? name.slice(1) : name;
+    return {
+      name: name,
+      once: once$$1,
+      capture: capture,
+      passive: passive
+    }
+  });
+
+  function createFnInvoker (fns, vm) {
+    function invoker () {
+      var arguments$1 = arguments;
+
+      var fns = invoker.fns;
+      if (Array.isArray(fns)) {
+        var cloned = fns.slice();
+        for (var i = 0; i < cloned.length; i++) {
+          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+        }
+      } else {
+        // return handler return value for single handlers
+        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+      }
+    }
+    invoker.fns = fns;
+    return invoker
+  }
+
+  function updateListeners (
+    on,
+    oldOn,
+    add,
+    remove$$1,
+    createOnceHandler,
+    vm
+  ) {
+    var name, def$$1, cur, old, event;
+    for (name in on) {
+      def$$1 = cur = on[name];
+      old = oldOn[name];
+      event = normalizeEvent(name);
+      if (isUndef(cur)) {
+        warn(
+          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+          vm
+        );
+      } else if (isUndef(old)) {
+        if (isUndef(cur.fns)) {
+          cur = on[name] = createFnInvoker(cur, vm);
+        }
+        if (isTrue(event.once)) {
+          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+        }
+        add(event.name, cur, event.capture, event.passive, event.params);
+      } else if (cur !== old) {
+        old.fns = cur;
+        on[name] = old;
+      }
+    }
+    for (name in oldOn) {
+      if (isUndef(on[name])) {
+        event = normalizeEvent(name);
+        remove$$1(event.name, oldOn[name], event.capture);
+      }
+    }
+  }
+
+  /*  */
+
+  function mergeVNodeHook (def, hookKey, hook) {
+    if (def instanceof VNode) {
+      def = def.data.hook || (def.data.hook = {});
+    }
+    var invoker;
+    var oldHook = def[hookKey];
+
+    function wrappedHook () {
+      hook.apply(this, arguments);
+      // important: remove merged hook to ensure it's called only once
+      // and prevent memory leak
+      remove(invoker.fns, wrappedHook);
+    }
+
+    if (isUndef(oldHook)) {
+      // no existing hook
+      invoker = createFnInvoker([wrappedHook]);
+    } else {
+      /* istanbul ignore if */
+      if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+        // already a merged invoker
+        invoker = oldHook;
+        invoker.fns.push(wrappedHook);
+      } else {
+        // existing plain hook
+        invoker = createFnInvoker([oldHook, wrappedHook]);
+      }
+    }
+
+    invoker.merged = true;
+    def[hookKey] = invoker;
+  }
+
+  /*  */
+
+  function extractPropsFromVNodeData (
+    data,
+    Ctor,
+    tag
+  ) {
+    // we are only extracting raw values here.
+    // validation and default values are handled in the child
+    // component itself.
+    var propOptions = Ctor.options.props;
+    if (isUndef(propOptions)) {
+      return
+    }
+    var res = {};
+    var attrs = data.attrs;
+    var props = data.props;
+    if (isDef(attrs) || isDef(props)) {
+      for (var key in propOptions) {
+        var altKey = hyphenate(key);
+        {
+          var keyInLowerCase = key.toLowerCase();
+          if (
+            key !== keyInLowerCase &&
+            attrs && hasOwn(attrs, keyInLowerCase)
+          ) {
+            tip(
+              "Prop \"" + keyInLowerCase + "\" is passed to component " +
+              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+              " \"" + key + "\". " +
+              "Note that HTML attributes are case-insensitive and camelCased " +
+              "props need to use their kebab-case equivalents when using in-DOM " +
+              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+            );
+          }
+        }
+        checkProp(res, props, key, altKey, true) ||
+        checkProp(res, attrs, key, altKey, false);
+      }
+    }
+    return res
+  }
+
+  function checkProp (
+    res,
+    hash,
+    key,
+    altKey,
+    preserve
+  ) {
+    if (isDef(hash)) {
+      if (hasOwn(hash, key)) {
+        res[key] = hash[key];
+        if (!preserve) {
+          delete hash[key];
+        }
+        return true
+      } else if (hasOwn(hash, altKey)) {
+        res[key] = hash[altKey];
+        if (!preserve) {
+          delete hash[altKey];
+        }
+        return true
+      }
+    }
+    return false
+  }
+
+  /*  */
+
+  // The template compiler attempts to minimize the need for normalization by
+  // statically analyzing the template at compile time.
+  //
+  // For plain HTML markup, normalization can be completely skipped because the
+  // generated render function is guaranteed to return Array<VNode>. There are
+  // two cases where extra normalization is needed:
+
+  // 1. When the children contains components - because a functional component
+  // may return an Array instead of a single root. In this case, just a simple
+  // normalization is needed - if any child is an Array, we flatten the whole
+  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+  // because functional components already normalize their own children.
+  function simpleNormalizeChildren (children) {
+    for (var i = 0; i < children.length; i++) {
+      if (Array.isArray(children[i])) {
+        return Array.prototype.concat.apply([], children)
+      }
+    }
+    return children
+  }
+
+  // 2. When the children contains constructs that always generated nested Arrays,
+  // e.g. <template>, <slot>, v-for, or when the children is provided by user
+  // with hand-written render functions / JSX. In such cases a full normalization
+  // is needed to cater to all possible types of children values.
+  function normalizeChildren (children) {
+    return isPrimitive(children)
+      ? [createTextVNode(children)]
+      : Array.isArray(children)
+        ? normalizeArrayChildren(children)
+        : undefined
+  }
+
+  function isTextNode (node) {
+    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+  }
+
+  function normalizeArrayChildren (children, nestedIndex) {
+    var res = [];
+    var i, c, lastIndex, last;
+    for (i = 0; i < children.length; i++) {
+      c = children[i];
+      if (isUndef(c) || typeof c === 'boolean') { continue }
+      lastIndex = res.length - 1;
+      last = res[lastIndex];
+      //  nested
+      if (Array.isArray(c)) {
+        if (c.length > 0) {
+          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+          // merge adjacent text nodes
+          if (isTextNode(c[0]) && isTextNode(last)) {
+            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+            c.shift();
+          }
+          res.push.apply(res, c);
+        }
+      } else if (isPrimitive(c)) {
+        if (isTextNode(last)) {
+          // merge adjacent text nodes
+          // this is necessary for SSR hydration because text nodes are
+          // essentially merged when rendered to HTML strings
+          res[lastIndex] = createTextVNode(last.text + c);
+        } else if (c !== '') {
+          // convert primitive to vnode
+          res.push(createTextVNode(c));
+        }
+      } else {
+        if (isTextNode(c) && isTextNode(last)) {
+          // merge adjacent text nodes
+          res[lastIndex] = createTextVNode(last.text + c.text);
+        } else {
+          // default key for nested array children (likely generated by v-for)
+          if (isTrue(children._isVList) &&
+            isDef(c.tag) &&
+            isUndef(c.key) &&
+            isDef(nestedIndex)) {
+            c.key = "__vlist" + nestedIndex + "_" + i + "__";
+          }
+          res.push(c);
+        }
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  function initProvide (vm) {
+    var provide = vm.$options.provide;
+    if (provide) {
+      vm._provided = typeof provide === 'function'
+        ? provide.call(vm)
+        : provide;
+    }
+  }
+
+  function initInjections (vm) {
+    var result = resolveInject(vm.$options.inject, vm);
+    if (result) {
+      toggleObserving(false);
+      Object.keys(result).forEach(function (key) {
+        /* istanbul ignore else */
+        {
+          defineReactive$$1(vm, key, result[key], function () {
+            warn(
+              "Avoid mutating an injected value directly since the changes will be " +
+              "overwritten whenever the provided component re-renders. " +
+              "injection being mutated: \"" + key + "\"",
+              vm
+            );
+          });
+        }
+      });
+      toggleObserving(true);
+    }
+  }
+
+  function resolveInject (inject, vm) {
+    if (inject) {
+      // inject is :any because flow is not smart enough to figure out cached
+      var result = Object.create(null);
+      var keys = hasSymbol
+        ? Reflect.ownKeys(inject)
+        : Object.keys(inject);
+
+      for (var i = 0; i < keys.length; i++) {
+        var key = keys[i];
+        // #6574 in case the inject object is observed...
+        if (key === '__ob__') { continue }
+        var provideKey = inject[key].from;
+        var source = vm;
+        while (source) {
+          if (source._provided && hasOwn(source._provided, provideKey)) {
+            result[key] = source._provided[provideKey];
+            break
+          }
+          source = source.$parent;
+        }
+        if (!source) {
+          if ('default' in inject[key]) {
+            var provideDefault = inject[key].default;
+            result[key] = typeof provideDefault === 'function'
+              ? provideDefault.call(vm)
+              : provideDefault;
+          } else {
+            warn(("Injection \"" + key + "\" not found"), vm);
+          }
+        }
+      }
+      return result
+    }
+  }
+
+  /*  */
+
+
+
+  /**
+   * Runtime helper for resolving raw children VNodes into a slot object.
+   */
+  function resolveSlots (
+    children,
+    context
+  ) {
+    if (!children || !children.length) {
+      return {}
+    }
+    var slots = {};
+    for (var i = 0, l = children.length; i < l; i++) {
+      var child = children[i];
+      var data = child.data;
+      // remove slot attribute if the node is resolved as a Vue slot node
+      if (data && data.attrs && data.attrs.slot) {
+        delete data.attrs.slot;
+      }
+      // named slots should only be respected if the vnode was rendered in the
+      // same context.
+      if ((child.context === context || child.fnContext === context) &&
+        data && data.slot != null
+      ) {
+        var name = data.slot;
+        var slot = (slots[name] || (slots[name] = []));
+        if (child.tag === 'template') {
+          slot.push.apply(slot, child.children || []);
+        } else {
+          slot.push(child);
+        }
+      } else {
+        (slots.default || (slots.default = [])).push(child);
+      }
+    }
+    // ignore slots that contains only whitespace
+    for (var name$1 in slots) {
+      if (slots[name$1].every(isWhitespace)) {
+        delete slots[name$1];
+      }
+    }
+    return slots
+  }
+
+  function isWhitespace (node) {
+    return (node.isComment && !node.asyncFactory) || node.text === ' '
+  }
+
+  /*  */
+
+  function normalizeScopedSlots (
+    slots,
+    normalSlots,
+    prevSlots
+  ) {
+    var res;
+    var hasNormalSlots = Object.keys(normalSlots).length > 0;
+    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+    var key = slots && slots.$key;
+    if (!slots) {
+      res = {};
+    } else if (slots._normalized) {
+      // fast path 1: child component re-render only, parent did not change
+      return slots._normalized
+    } else if (
+      isStable &&
+      prevSlots &&
+      prevSlots !== emptyObject &&
+      key === prevSlots.$key &&
+      !hasNormalSlots &&
+      !prevSlots.$hasNormal
+    ) {
+      // fast path 2: stable scoped slots w/ no normal slots to proxy,
+      // only need to normalize once
+      return prevSlots
+    } else {
+      res = {};
+      for (var key$1 in slots) {
+        if (slots[key$1] && key$1[0] !== '$') {
+          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+        }
+      }
+    }
+    // expose normal slots on scopedSlots
+    for (var key$2 in normalSlots) {
+      if (!(key$2 in res)) {
+        res[key$2] = proxyNormalSlot(normalSlots, key$2);
+      }
+    }
+    // avoriaz seems to mock a non-extensible $scopedSlots object
+    // and when that is passed down this would cause an error
+    if (slots && Object.isExtensible(slots)) {
+      (slots)._normalized = res;
+    }
+    def(res, '$stable', isStable);
+    def(res, '$key', key);
+    def(res, '$hasNormal', hasNormalSlots);
+    return res
+  }
+
+  function normalizeScopedSlot(normalSlots, key, fn) {
+    var normalized = function () {
+      var res = arguments.length ? fn.apply(null, arguments) : fn({});
+      res = res && typeof res === 'object' && !Array.isArray(res)
+        ? [res] // single vnode
+        : normalizeChildren(res);
+      return res && (
+        res.length === 0 ||
+        (res.length === 1 && res[0].isComment) // #9658
+      ) ? undefined
+        : res
+    };
+    // this is a slot using the new v-slot syntax without scope. although it is
+    // compiled as a scoped slot, render fn users would expect it to be present
+    // on this.$slots because the usage is semantically a normal slot.
+    if (fn.proxy) {
+      Object.defineProperty(normalSlots, key, {
+        get: normalized,
+        enumerable: true,
+        configurable: true
+      });
+    }
+    return normalized
+  }
+
+  function proxyNormalSlot(slots, key) {
+    return function () { return slots[key]; }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering v-for lists.
+   */
+  function renderList (
+    val,
+    render
+  ) {
+    var ret, i, l, keys, key;
+    if (Array.isArray(val) || typeof val === 'string') {
+      ret = new Array(val.length);
+      for (i = 0, l = val.length; i < l; i++) {
+        ret[i] = render(val[i], i);
+      }
+    } else if (typeof val === 'number') {
+      ret = new Array(val);
+      for (i = 0; i < val; i++) {
+        ret[i] = render(i + 1, i);
+      }
+    } else if (isObject(val)) {
+      if (hasSymbol && val[Symbol.iterator]) {
+        ret = [];
+        var iterator = val[Symbol.iterator]();
+        var result = iterator.next();
+        while (!result.done) {
+          ret.push(render(result.value, ret.length));
+          result = iterator.next();
+        }
+      } else {
+        keys = Object.keys(val);
+        ret = new Array(keys.length);
+        for (i = 0, l = keys.length; i < l; i++) {
+          key = keys[i];
+          ret[i] = render(val[key], key, i);
+        }
+      }
+    }
+    if (!isDef(ret)) {
+      ret = [];
+    }
+    (ret)._isVList = true;
+    return ret
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering <slot>
+   */
+  function renderSlot (
+    name,
+    fallback,
+    props,
+    bindObject
+  ) {
+    var scopedSlotFn = this.$scopedSlots[name];
+    var nodes;
+    if (scopedSlotFn) { // scoped slot
+      props = props || {};
+      if (bindObject) {
+        if (!isObject(bindObject)) {
+          warn(
+            'slot v-bind without argument expects an Object',
+            this
+          );
+        }
+        props = extend(extend({}, bindObject), props);
+      }
+      nodes = scopedSlotFn(props) || fallback;
+    } else {
+      nodes = this.$slots[name] || fallback;
+    }
+
+    var target = props && props.slot;
+    if (target) {
+      return this.$createElement('template', { slot: target }, nodes)
+    } else {
+      return nodes
+    }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for resolving filters
+   */
+  function resolveFilter (id) {
+    return resolveAsset(this.$options, 'filters', id, true) || identity
+  }
+
+  /*  */
+
+  function isKeyNotMatch (expect, actual) {
+    if (Array.isArray(expect)) {
+      return expect.indexOf(actual) === -1
+    } else {
+      return expect !== actual
+    }
+  }
+
+  /**
+   * Runtime helper for checking keyCodes from config.
+   * exposed as Vue.prototype._k
+   * passing in eventKeyName as last argument separately for backwards compat
+   */
+  function checkKeyCodes (
+    eventKeyCode,
+    key,
+    builtInKeyCode,
+    eventKeyName,
+    builtInKeyName
+  ) {
+    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+      return isKeyNotMatch(builtInKeyName, eventKeyName)
+    } else if (mappedKeyCode) {
+      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+    } else if (eventKeyName) {
+      return hyphenate(eventKeyName) !== key
+    }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for merging v-bind="object" into a VNode's data.
+   */
+  function bindObjectProps (
+    data,
+    tag,
+    value,
+    asProp,
+    isSync
+  ) {
+    if (value) {
+      if (!isObject(value)) {
+        warn(
+          'v-bind without argument expects an Object or Array value',
+          this
+        );
+      } else {
+        if (Array.isArray(value)) {
+          value = toObject(value);
+        }
+        var hash;
+        var loop = function ( key ) {
+          if (
+            key === 'class' ||
+            key === 'style' ||
+            isReservedAttribute(key)
+          ) {
+            hash = data;
+          } else {
+            var type = data.attrs && data.attrs.type;
+            hash = asProp || config.mustUseProp(tag, type, key)
+              ? data.domProps || (data.domProps = {})
+              : data.attrs || (data.attrs = {});
+          }
+          var camelizedKey = camelize(key);
+          var hyphenatedKey = hyphenate(key);
+          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+            hash[key] = value[key];
+
+            if (isSync) {
+              var on = data.on || (data.on = {});
+              on[("update:" + key)] = function ($event) {
+                value[key] = $event;
+              };
+            }
+          }
+        };
+
+        for (var key in value) loop( key );
+      }
+    }
+    return data
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering static trees.
+   */
+  function renderStatic (
+    index,
+    isInFor
+  ) {
+    var cached = this._staticTrees || (this._staticTrees = []);
+    var tree = cached[index];
+    // if has already-rendered static tree and not inside v-for,
+    // we can reuse the same tree.
+    if (tree && !isInFor) {
+      return tree
+    }
+    // otherwise, render a fresh tree.
+    tree = cached[index] = this.$options.staticRenderFns[index].call(
+      this._renderProxy,
+      null,
+      this // for render fns generated for functional component templates
+    );
+    markStatic(tree, ("__static__" + index), false);
+    return tree
+  }
+
+  /**
+   * Runtime helper for v-once.
+   * Effectively it means marking the node as static with a unique key.
+   */
+  function markOnce (
+    tree,
+    index,
+    key
+  ) {
+    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+    return tree
+  }
+
+  function markStatic (
+    tree,
+    key,
+    isOnce
+  ) {
+    if (Array.isArray(tree)) {
+      for (var i = 0; i < tree.length; i++) {
+        if (tree[i] && typeof tree[i] !== 'string') {
+          markStaticNode(tree[i], (key + "_" + i), isOnce);
+        }
+      }
+    } else {
+      markStaticNode(tree, key, isOnce);
+    }
+  }
+
+  function markStaticNode (node, key, isOnce) {
+    node.isStatic = true;
+    node.key = key;
+    node.isOnce = isOnce;
+  }
+
+  /*  */
+
+  function bindObjectListeners (data, value) {
+    if (value) {
+      if (!isPlainObject(value)) {
+        warn(
+          'v-on without argument expects an Object value',
+          this
+        );
+      } else {
+        var on = data.on = data.on ? extend({}, data.on) : {};
+        for (var key in value) {
+          var existing = on[key];
+          var ours = value[key];
+          on[key] = existing ? [].concat(existing, ours) : ours;
+        }
+      }
+    }
+    return data
+  }
+
+  /*  */
+
+  function resolveScopedSlots (
+    fns, // see flow/vnode
+    res,
+    // the following are added in 2.6
+    hasDynamicKeys,
+    contentHashKey
+  ) {
+    res = res || { $stable: !hasDynamicKeys };
+    for (var i = 0; i < fns.length; i++) {
+      var slot = fns[i];
+      if (Array.isArray(slot)) {
+        resolveScopedSlots(slot, res, hasDynamicKeys);
+      } else if (slot) {
+        // marker for reverse proxying v-slot without scope on this.$slots
+        if (slot.proxy) {
+          slot.fn.proxy = true;
+        }
+        res[slot.key] = slot.fn;
+      }
+    }
+    if (contentHashKey) {
+      (res).$key = contentHashKey;
+    }
+    return res
+  }
+
+  /*  */
+
+  function bindDynamicKeys (baseObj, values) {
+    for (var i = 0; i < values.length; i += 2) {
+      var key = values[i];
+      if (typeof key === 'string' && key) {
+        baseObj[values[i]] = values[i + 1];
+      } else if (key !== '' && key !== null) {
+        // null is a special value for explicitly removing a binding
+        warn(
+          ("Invalid value for dynamic directive argument (expected string or null): " + key),
+          this
+        );
+      }
+    }
+    return baseObj
+  }
+
+  // helper to dynamically append modifier runtime markers to event names.
+  // ensure only append when value is already string, otherwise it will be cast
+  // to string and cause the type check to miss.
+  function prependModifier (value, symbol) {
+    return typeof value === 'string' ? symbol + value : value
+  }
+
+  /*  */
+
+  function installRenderHelpers (target) {
+    target._o = markOnce;
+    target._n = toNumber;
+    target._s = toString;
+    target._l = renderList;
+    target._t = renderSlot;
+    target._q = looseEqual;
+    target._i = looseIndexOf;
+    target._m = renderStatic;
+    target._f = resolveFilter;
+    target._k = checkKeyCodes;
+    target._b = bindObjectProps;
+    target._v = createTextVNode;
+    target._e = createEmptyVNode;
+    target._u = resolveScopedSlots;
+    target._g = bindObjectListeners;
+    target._d = bindDynamicKeys;
+    target._p = prependModifier;
+  }
+
+  /*  */
+
+  function FunctionalRenderContext (
+    data,
+    props,
+    children,
+    parent,
+    Ctor
+  ) {
+    var this$1 = this;
+
+    var options = Ctor.options;
+    // ensure the createElement function in functional components
+    // gets a unique context - this is necessary for correct named slot check
+    var contextVm;
+    if (hasOwn(parent, '_uid')) {
+      contextVm = Object.create(parent);
+      // $flow-disable-line
+      contextVm._original = parent;
+    } else {
+      // the context vm passed in is a functional context as well.
+      // in this case we want to make sure we are able to get a hold to the
+      // real context instance.
+      contextVm = parent;
+      // $flow-disable-line
+      parent = parent._original;
+    }
+    var isCompiled = isTrue(options._compiled);
+    var needNormalization = !isCompiled;
+
+    this.data = data;
+    this.props = props;
+    this.children = children;
+    this.parent = parent;
+    this.listeners = data.on || emptyObject;
+    this.injections = resolveInject(options.inject, parent);
+    this.slots = function () {
+      if (!this$1.$slots) {
+        normalizeScopedSlots(
+          data.scopedSlots,
+          this$1.$slots = resolveSlots(children, parent)
+        );
+      }
+      return this$1.$slots
+    };
+
+    Object.defineProperty(this, 'scopedSlots', ({
+      enumerable: true,
+      get: function get () {
+        return normalizeScopedSlots(data.scopedSlots, this.slots())
+      }
+    }));
+
+    // support for compiled functional template
+    if (isCompiled) {
+      // exposing $options for renderStatic()
+      this.$options = options;
+      // pre-resolve slots for renderSlot()
+      this.$slots = this.slots();
+      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+    }
+
+    if (options._scopeId) {
+      this._c = function (a, b, c, d) {
+        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+        if (vnode && !Array.isArray(vnode)) {
+          vnode.fnScopeId = options._scopeId;
+          vnode.fnContext = parent;
+        }
+        return vnode
+      };
+    } else {
+      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+    }
+  }
+
+  installRenderHelpers(FunctionalRenderContext.prototype);
+
+  function createFunctionalComponent (
+    Ctor,
+    propsData,
+    data,
+    contextVm,
+    children
+  ) {
+    var options = Ctor.options;
+    var props = {};
+    var propOptions = options.props;
+    if (isDef(propOptions)) {
+      for (var key in propOptions) {
+        props[key] = validateProp(key, propOptions, propsData || emptyObject);
+      }
+    } else {
+      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+      if (isDef(data.props)) { mergeProps(props, data.props); }
+    }
+
+    var renderContext = new FunctionalRenderContext(
+      data,
+      props,
+      children,
+      contextVm,
+      Ctor
+    );
+
+    var vnode = options.render.call(null, renderContext._c, renderContext);
+
+    if (vnode instanceof VNode) {
+      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+    } else if (Array.isArray(vnode)) {
+      var vnodes = normalizeChildren(vnode) || [];
+      var res = new Array(vnodes.length);
+      for (var i = 0; i < vnodes.length; i++) {
+        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+      }
+      return res
+    }
+  }
+
+  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+    // #7817 clone node before setting fnContext, otherwise if the node is reused
+    // (e.g. it was from a cached normal slot) the fnContext causes named slots
+    // that should not be matched to match.
+    var clone = cloneVNode(vnode);
+    clone.fnContext = contextVm;
+    clone.fnOptions = options;
+    {
+      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+    }
+    if (data.slot) {
+      (clone.data || (clone.data = {})).slot = data.slot;
+    }
+    return clone
+  }
+
+  function mergeProps (to, from) {
+    for (var key in from) {
+      to[camelize(key)] = from[key];
+    }
+  }
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  // inline hooks to be invoked on component VNodes during patch
+  var componentVNodeHooks = {
+    init: function init (vnode, hydrating) {
+      if (
+        vnode.componentInstance &&
+        !vnode.componentInstance._isDestroyed &&
+        vnode.data.keepAlive
+      ) {
+        // kept-alive components, treat as a patch
+        var mountedNode = vnode; // work around flow
+        componentVNodeHooks.prepatch(mountedNode, mountedNode);
+      } else {
+        var child = vnode.componentInstance = createComponentInstanceForVnode(
+          vnode,
+          activeInstance
+        );
+        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+      }
+    },
+
+    prepatch: function prepatch (oldVnode, vnode) {
+      var options = vnode.componentOptions;
+      var child = vnode.componentInstance = oldVnode.componentInstance;
+      updateChildComponent(
+        child,
+        options.propsData, // updated props
+        options.listeners, // updated listeners
+        vnode, // new parent vnode
+        options.children // new children
+      );
+    },
+
+    insert: function insert (vnode) {
+      var context = vnode.context;
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isMounted) {
+        componentInstance._isMounted = true;
+        callHook(componentInstance, 'mounted');
+      }
+      if (vnode.data.keepAlive) {
+        if (context._isMounted) {
+          // vue-router#1212
+          // During updates, a kept-alive component's child components may
+          // change, so directly walking the tree here may call activated hooks
+          // on incorrect children. Instead we push them into a queue which will
+          // be processed after the whole patch process ended.
+          queueActivatedComponent(componentInstance);
+        } else {
+          activateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    },
+
+    destroy: function destroy (vnode) {
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isDestroyed) {
+        if (!vnode.data.keepAlive) {
+          componentInstance.$destroy();
+        } else {
+          deactivateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    }
+  };
+
+  var hooksToMerge = Object.keys(componentVNodeHooks);
+
+  function createComponent (
+    Ctor,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    if (isUndef(Ctor)) {
+      return
+    }
+
+    var baseCtor = context.$options._base;
+
+    // plain options object: turn it into a constructor
+    if (isObject(Ctor)) {
+      Ctor = baseCtor.extend(Ctor);
+    }
+
+    // if at this stage it's not a constructor or an async component factory,
+    // reject.
+    if (typeof Ctor !== 'function') {
+      {
+        warn(("Invalid Component definition: " + (String(Ctor))), context);
+      }
+      return
+    }
+
+    // async component
+    var asyncFactory;
+    if (isUndef(Ctor.cid)) {
+      asyncFactory = Ctor;
+      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+      if (Ctor === undefined) {
+        // return a placeholder node for async component, which is rendered
+        // as a comment node but preserves all the raw information for the node.
+        // the information will be used for async server-rendering and hydration.
+        return createAsyncPlaceholder(
+          asyncFactory,
+          data,
+          context,
+          children,
+          tag
+        )
+      }
+    }
+
+    data = data || {};
+
+    // resolve constructor options in case global mixins are applied after
+    // component constructor creation
+    resolveConstructorOptions(Ctor);
+
+    // transform component v-model data into props & events
+    if (isDef(data.model)) {
+      transformModel(Ctor.options, data);
+    }
+
+    // extract props
+    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+    // functional component
+    if (isTrue(Ctor.options.functional)) {
+      return createFunctionalComponent(Ctor, propsData, data, context, children)
+    }
+
+    // extract listeners, since these needs to be treated as
+    // child component listeners instead of DOM listeners
+    var listeners = data.on;
+    // replace with listeners with .native modifier
+    // so it gets processed during parent component patch.
+    data.on = data.nativeOn;
+
+    if (isTrue(Ctor.options.abstract)) {
+      // abstract components do not keep anything
+      // other than props & listeners & slot
+
+      // work around flow
+      var slot = data.slot;
+      data = {};
+      if (slot) {
+        data.slot = slot;
+      }
+    }
+
+    // install component management hooks onto the placeholder node
+    installComponentHooks(data);
+
+    // return a placeholder vnode
+    var name = Ctor.options.name || tag;
+    var vnode = new VNode(
+      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+      data, undefined, undefined, undefined, context,
+      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+      asyncFactory
+    );
+
+    return vnode
+  }
+
+  function createComponentInstanceForVnode (
+    vnode, // we know it's MountedComponentVNode but flow doesn't
+    parent // activeInstance in lifecycle state
+  ) {
+    var options = {
+      _isComponent: true,
+      _parentVnode: vnode,
+      parent: parent
+    };
+    // check inline-template render functions
+    var inlineTemplate = vnode.data.inlineTemplate;
+    if (isDef(inlineTemplate)) {
+      options.render = inlineTemplate.render;
+      options.staticRenderFns = inlineTemplate.staticRenderFns;
+    }
+    return new vnode.componentOptions.Ctor(options)
+  }
+
+  function installComponentHooks (data) {
+    var hooks = data.hook || (data.hook = {});
+    for (var i = 0; i < hooksToMerge.length; i++) {
+      var key = hooksToMerge[i];
+      var existing = hooks[key];
+      var toMerge = componentVNodeHooks[key];
+      if (existing !== toMerge && !(existing && existing._merged)) {
+        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+      }
+    }
+  }
+
+  function mergeHook$1 (f1, f2) {
+    var merged = function (a, b) {
+      // flow complains about extra args which is why we use any
+      f1(a, b);
+      f2(a, b);
+    };
+    merged._merged = true;
+    return merged
+  }
+
+  // transform component v-model info (value and callback) into
+  // prop and event handler respectively.
+  function transformModel (options, data) {
+    var prop = (options.model && options.model.prop) || 'value';
+    var event = (options.model && options.model.event) || 'input'
+    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+    var on = data.on || (data.on = {});
+    var existing = on[event];
+    var callback = data.model.callback;
+    if (isDef(existing)) {
+      if (
+        Array.isArray(existing)
+          ? existing.indexOf(callback) === -1
+          : existing !== callback
+      ) {
+        on[event] = [callback].concat(existing);
+      }
+    } else {
+      on[event] = callback;
+    }
+  }
+
+  /*  */
+
+  var SIMPLE_NORMALIZE = 1;
+  var ALWAYS_NORMALIZE = 2;
+
+  // wrapper function for providing a more flexible interface
+  // without getting yelled at by flow
+  function createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType,
+    alwaysNormalize
+  ) {
+    if (Array.isArray(data) || isPrimitive(data)) {
+      normalizationType = children;
+      children = data;
+      data = undefined;
+    }
+    if (isTrue(alwaysNormalize)) {
+      normalizationType = ALWAYS_NORMALIZE;
+    }
+    return _createElement(context, tag, data, children, normalizationType)
+  }
+
+  function _createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType
+  ) {
+    if (isDef(data) && isDef((data).__ob__)) {
+      warn(
+        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+        'Always create fresh vnode data objects in each render!',
+        context
+      );
+      return createEmptyVNode()
+    }
+    // object syntax in v-bind
+    if (isDef(data) && isDef(data.is)) {
+      tag = data.is;
+    }
+    if (!tag) {
+      // in case of component :is set to falsy value
+      return createEmptyVNode()
+    }
+    // warn against non-primitive key
+    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+    ) {
+      {
+        warn(
+          'Avoid using non-primitive value as key, ' +
+          'use string/number value instead.',
+          context
+        );
+      }
+    }
+    // support single function children as default scoped slot
+    if (Array.isArray(children) &&
+      typeof children[0] === 'function'
+    ) {
+      data = data || {};
+      data.scopedSlots = { default: children[0] };
+      children.length = 0;
+    }
+    if (normalizationType === ALWAYS_NORMALIZE) {
+      children = normalizeChildren(children);
+    } else if (normalizationType === SIMPLE_NORMALIZE) {
+      children = simpleNormalizeChildren(children);
+    }
+    var vnode, ns;
+    if (typeof tag === 'string') {
+      var Ctor;
+      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+      if (config.isReservedTag(tag)) {
+        // platform built-in elements
+        if (isDef(data) && isDef(data.nativeOn)) {
+          warn(
+            ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+            context
+          );
+        }
+        vnode = new VNode(
+          config.parsePlatformTagName(tag), data, children,
+          undefined, undefined, context
+        );
+      } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+        // component
+        vnode = createComponent(Ctor, data, context, children, tag);
+      } else {
+        // unknown or unlisted namespaced elements
+        // check at runtime because it may get assigned a namespace when its
+        // parent normalizes children
+        vnode = new VNode(
+          tag, data, children,
+          undefined, undefined, context
+        );
+      }
+    } else {
+      // direct component options / constructor
+      vnode = createComponent(tag, data, context, children);
+    }
+    if (Array.isArray(vnode)) {
+      return vnode
+    } else if (isDef(vnode)) {
+      if (isDef(ns)) { applyNS(vnode, ns); }
+      if (isDef(data)) { registerDeepBindings(data); }
+      return vnode
+    } else {
+      return createEmptyVNode()
+    }
+  }
+
+  function applyNS (vnode, ns, force) {
+    vnode.ns = ns;
+    if (vnode.tag === 'foreignObject') {
+      // use default namespace inside foreignObject
+      ns = undefined;
+      force = true;
+    }
+    if (isDef(vnode.children)) {
+      for (var i = 0, l = vnode.children.length; i < l; i++) {
+        var child = vnode.children[i];
+        if (isDef(child.tag) && (
+          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+          applyNS(child, ns, force);
+        }
+      }
+    }
+  }
+
+  // ref #5318
+  // necessary to ensure parent re-render when deep bindings like :style and
+  // :class are used on slot nodes
+  function registerDeepBindings (data) {
+    if (isObject(data.style)) {
+      traverse(data.style);
+    }
+    if (isObject(data.class)) {
+      traverse(data.class);
+    }
+  }
+
+  /*  */
+
+  function initRender (vm) {
+    vm._vnode = null; // the root of the child tree
+    vm._staticTrees = null; // v-once cached trees
+    var options = vm.$options;
+    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+    var renderContext = parentVnode && parentVnode.context;
+    vm.$slots = resolveSlots(options._renderChildren, renderContext);
+    vm.$scopedSlots = emptyObject;
+    // bind the createElement fn to this instance
+    // so that we get proper render context inside it.
+    // args order: tag, data, children, normalizationType, alwaysNormalize
+    // internal version is used by render functions compiled from templates
+    vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+    // normalization is always applied for the public version, used in
+    // user-written render functions.
+    vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+    // $attrs & $listeners are exposed for easier HOC creation.
+    // they need to be reactive so that HOCs using them are always updated
+    var parentData = parentVnode && parentVnode.data;
+
+    /* istanbul ignore else */
+    {
+      defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+      }, true);
+      defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+      }, true);
+    }
+  }
+
+  var currentRenderingInstance = null;
+
+  function renderMixin (Vue) {
+    // install runtime convenience helpers
+    installRenderHelpers(Vue.prototype);
+
+    Vue.prototype.$nextTick = function (fn) {
+      return nextTick(fn, this)
+    };
+
+    Vue.prototype._render = function () {
+      var vm = this;
+      var ref = vm.$options;
+      var render = ref.render;
+      var _parentVnode = ref._parentVnode;
+
+      if (_parentVnode) {
+        vm.$scopedSlots = normalizeScopedSlots(
+          _parentVnode.data.scopedSlots,
+          vm.$slots,
+          vm.$scopedSlots
+        );
+      }
+
+      // set parent vnode. this allows render functions to have access
+      // to the data on the placeholder node.
+      vm.$vnode = _parentVnode;
+      // render self
+      var vnode;
+      try {
+        // There's no need to maintain a stack because all render fns are called
+        // separately from one another. Nested component's render fns are called
+        // when parent component is patched.
+        currentRenderingInstance = vm;
+        vnode = render.call(vm._renderProxy, vm.$createElement);
+      } catch (e) {
+        handleError(e, vm, "render");
+        // return error render result,
+        // or previous vnode to prevent render error causing blank component
+        /* istanbul ignore else */
+        if (vm.$options.renderError) {
+          try {
+            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+          } catch (e) {
+            handleError(e, vm, "renderError");
+            vnode = vm._vnode;
+          }
+        } else {
+          vnode = vm._vnode;
+        }
+      } finally {
+        currentRenderingInstance = null;
+      }
+      // if the returned array contains only a single node, allow it
+      if (Array.isArray(vnode) && vnode.length === 1) {
+        vnode = vnode[0];
+      }
+      // return empty vnode in case the render function errored out
+      if (!(vnode instanceof VNode)) {
+        if (Array.isArray(vnode)) {
+          warn(
+            'Multiple root nodes returned from render function. Render function ' +
+            'should return a single root node.',
+            vm
+          );
+        }
+        vnode = createEmptyVNode();
+      }
+      // set parent
+      vnode.parent = _parentVnode;
+      return vnode
+    };
+  }
+
+  /*  */
+
+  function ensureCtor (comp, base) {
+    if (
+      comp.__esModule ||
+      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+    ) {
+      comp = comp.default;
+    }
+    return isObject(comp)
+      ? base.extend(comp)
+      : comp
+  }
+
+  function createAsyncPlaceholder (
+    factory,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    var node = createEmptyVNode();
+    node.asyncFactory = factory;
+    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+    return node
+  }
+
+  function resolveAsyncComponent (
+    factory,
+    baseCtor
+  ) {
+    if (isTrue(factory.error) && isDef(factory.errorComp)) {
+      return factory.errorComp
+    }
+
+    if (isDef(factory.resolved)) {
+      return factory.resolved
+    }
+
+    var owner = currentRenderingInstance;
+    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+      // already pending
+      factory.owners.push(owner);
+    }
+
+    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+      return factory.loadingComp
+    }
+
+    if (owner && !isDef(factory.owners)) {
+      var owners = factory.owners = [owner];
+      var sync = true;
+      var timerLoading = null;
+      var timerTimeout = null
+
+      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+      var forceRender = function (renderCompleted) {
+        for (var i = 0, l = owners.length; i < l; i++) {
+          (owners[i]).$forceUpdate();
+        }
+
+        if (renderCompleted) {
+          owners.length = 0;
+          if (timerLoading !== null) {
+            clearTimeout(timerLoading);
+            timerLoading = null;
+          }
+          if (timerTimeout !== null) {
+            clearTimeout(timerTimeout);
+            timerTimeout = null;
+          }
+        }
+      };
+
+      var resolve = once(function (res) {
+        // cache resolved
+        factory.resolved = ensureCtor(res, baseCtor);
+        // invoke callbacks only if this is not a synchronous resolve
+        // (async resolves are shimmed as synchronous during SSR)
+        if (!sync) {
+          forceRender(true);
+        } else {
+          owners.length = 0;
+        }
+      });
+
+      var reject = once(function (reason) {
+        warn(
+          "Failed to resolve async component: " + (String(factory)) +
+          (reason ? ("\nReason: " + reason) : '')
+        );
+        if (isDef(factory.errorComp)) {
+          factory.error = true;
+          forceRender(true);
+        }
+      });
+
+      var res = factory(resolve, reject);
+
+      if (isObject(res)) {
+        if (isPromise(res)) {
+          // () => Promise
+          if (isUndef(factory.resolved)) {
+            res.then(resolve, reject);
+          }
+        } else if (isPromise(res.component)) {
+          res.component.then(resolve, reject);
+
+          if (isDef(res.error)) {
+            factory.errorComp = ensureCtor(res.error, baseCtor);
+          }
+
+          if (isDef(res.loading)) {
+            factory.loadingComp = ensureCtor(res.loading, baseCtor);
+            if (res.delay === 0) {
+              factory.loading = true;
+            } else {
+              timerLoading = setTimeout(function () {
+                timerLoading = null;
+                if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                  factory.loading = true;
+                  forceRender(false);
+                }
+              }, res.delay || 200);
+            }
+          }
+
+          if (isDef(res.timeout)) {
+            timerTimeout = setTimeout(function () {
+              timerTimeout = null;
+              if (isUndef(factory.resolved)) {
+                reject(
+                  "timeout (" + (res.timeout) + "ms)"
+                );
+              }
+            }, res.timeout);
+          }
+        }
+      }
+
+      sync = false;
+      // return in case resolved synchronously
+      return factory.loading
+        ? factory.loadingComp
+        : factory.resolved
+    }
+  }
+
+  /*  */
+
+  function isAsyncPlaceholder (node) {
+    return node.isComment && node.asyncFactory
+  }
+
+  /*  */
+
+  function getFirstComponentChild (children) {
+    if (Array.isArray(children)) {
+      for (var i = 0; i < children.length; i++) {
+        var c = children[i];
+        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+          return c
+        }
+      }
+    }
+  }
+
+  /*  */
+
+  /*  */
+
+  function initEvents (vm) {
+    vm._events = Object.create(null);
+    vm._hasHookEvent = false;
+    // init parent attached events
+    var listeners = vm.$options._parentListeners;
+    if (listeners) {
+      updateComponentListeners(vm, listeners);
+    }
+  }
+
+  var target;
+
+  function add (event, fn) {
+    target.$on(event, fn);
+  }
+
+  function remove$1 (event, fn) {
+    target.$off(event, fn);
+  }
+
+  function createOnceHandler (event, fn) {
+    var _target = target;
+    return function onceHandler () {
+      var res = fn.apply(null, arguments);
+      if (res !== null) {
+        _target.$off(event, onceHandler);
+      }
+    }
+  }
+
+  function updateComponentListeners (
+    vm,
+    listeners,
+    oldListeners
+  ) {
+    target = vm;
+    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+    target = undefined;
+  }
+
+  function eventsMixin (Vue) {
+    var hookRE = /^hook:/;
+    Vue.prototype.$on = function (event, fn) {
+      var vm = this;
+      if (Array.isArray(event)) {
+        for (var i = 0, l = event.length; i < l; i++) {
+          vm.$on(event[i], fn);
+        }
+      } else {
+        (vm._events[event] || (vm._events[event] = [])).push(fn);
+        // optimize hook:event cost by using a boolean flag marked at registration
+        // instead of a hash lookup
+        if (hookRE.test(event)) {
+          vm._hasHookEvent = true;
+        }
+      }
+      return vm
+    };
+
+    Vue.prototype.$once = function (event, fn) {
+      var vm = this;
+      function on () {
+        vm.$off(event, on);
+        fn.apply(vm, arguments);
+      }
+      on.fn = fn;
+      vm.$on(event, on);
+      return vm
+    };
+
+    Vue.prototype.$off = function (event, fn) {
+      var vm = this;
+      // all
+      if (!arguments.length) {
+        vm._events = Object.create(null);
+        return vm
+      }
+      // array of events
+      if (Array.isArray(event)) {
+        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+          vm.$off(event[i$1], fn);
+        }
+        return vm
+      }
+      // specific event
+      var cbs = vm._events[event];
+      if (!cbs) {
+        return vm
+      }
+      if (!fn) {
+        vm._events[event] = null;
+        return vm
+      }
+      // specific handler
+      var cb;
+      var i = cbs.length;
+      while (i--) {
+        cb = cbs[i];
+        if (cb === fn || cb.fn === fn) {
+          cbs.splice(i, 1);
+          break
+        }
+      }
+      return vm
+    };
+
+    Vue.prototype.$emit = function (event) {
+      var vm = this;
+      {
+        var lowerCaseEvent = event.toLowerCase();
+        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+          tip(
+            "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+            (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+            "Note that HTML attributes are case-insensitive and you cannot use " +
+            "v-on to listen to camelCase events when using in-DOM templates. " +
+            "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+          );
+        }
+      }
+      var cbs = vm._events[event];
+      if (cbs) {
+        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+        var args = toArray(arguments, 1);
+        var info = "event handler for \"" + event + "\"";
+        for (var i = 0, l = cbs.length; i < l; i++) {
+          invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+        }
+      }
+      return vm
+    };
+  }
+
+  /*  */
+
+  var activeInstance = null;
+  var isUpdatingChildComponent = false;
+
+  function setActiveInstance(vm) {
+    var prevActiveInstance = activeInstance;
+    activeInstance = vm;
+    return function () {
+      activeInstance = prevActiveInstance;
+    }
+  }
+
+  function initLifecycle (vm) {
+    var options = vm.$options;
+
+    // locate first non-abstract parent
+    var parent = options.parent;
+    if (parent && !options.abstract) {
+      while (parent.$options.abstract && parent.$parent) {
+        parent = parent.$parent;
+      }
+      parent.$children.push(vm);
+    }
+
+    vm.$parent = parent;
+    vm.$root = parent ? parent.$root : vm;
+
+    vm.$children = [];
+    vm.$refs = {};
+
+    vm._watcher = null;
+    vm._inactive = null;
+    vm._directInactive = false;
+    vm._isMounted = false;
+    vm._isDestroyed = false;
+    vm._isBeingDestroyed = false;
+  }
+
+  function lifecycleMixin (Vue) {
+    Vue.prototype._update = function (vnode, hydrating) {
+      var vm = this;
+      var prevEl = vm.$el;
+      var prevVnode = vm._vnode;
+      var restoreActiveInstance = setActiveInstance(vm);
+      vm._vnode = vnode;
+      // Vue.prototype.__patch__ is injected in entry points
+      // based on the rendering backend used.
+      if (!prevVnode) {
+        // initial render
+        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+      } else {
+        // updates
+        vm.$el = vm.__patch__(prevVnode, vnode);
+      }
+      restoreActiveInstance();
+      // update __vue__ reference
+      if (prevEl) {
+        prevEl.__vue__ = null;
+      }
+      if (vm.$el) {
+        vm.$el.__vue__ = vm;
+      }
+      // if parent is an HOC, update its $el as well
+      if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+        vm.$parent.$el = vm.$el;
+      }
+      // updated hook is called by the scheduler to ensure that children are
+      // updated in a parent's updated hook.
+    };
+
+    Vue.prototype.$forceUpdate = function () {
+      var vm = this;
+      if (vm._watcher) {
+        vm._watcher.update();
+      }
+    };
+
+    Vue.prototype.$destroy = function () {
+      var vm = this;
+      if (vm._isBeingDestroyed) {
+        return
+      }
+      callHook(vm, 'beforeDestroy');
+      vm._isBeingDestroyed = true;
+      // remove self from parent
+      var parent = vm.$parent;
+      if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+        remove(parent.$children, vm);
+      }
+      // teardown watchers
+      if (vm._watcher) {
+        vm._watcher.teardown();
+      }
+      var i = vm._watchers.length;
+      while (i--) {
+        vm._watchers[i].teardown();
+      }
+      // remove reference from data ob
+      // frozen object may not have observer.
+      if (vm._data.__ob__) {
+        vm._data.__ob__.vmCount--;
+      }
+      // call the last hook...
+      vm._isDestroyed = true;
+      // invoke destroy hooks on current rendered tree
+      vm.__patch__(vm._vnode, null);
+      // fire destroyed hook
+      callHook(vm, 'destroyed');
+      // turn off all instance listeners.
+      vm.$off();
+      // remove __vue__ reference
+      if (vm.$el) {
+        vm.$el.__vue__ = null;
+      }
+      // release circular reference (#6759)
+      if (vm.$vnode) {
+        vm.$vnode.parent = null;
+      }
+    };
+  }
+
+  function mountComponent (
+    vm,
+    el,
+    hydrating
+  ) {
+    vm.$el = el;
+    if (!vm.$options.render) {
+      vm.$options.render = createEmptyVNode;
+      {
+        /* istanbul ignore if */
+        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+          vm.$options.el || el) {
+          warn(
+            'You are using the runtime-only build of Vue where the template ' +
+            'compiler is not available. Either pre-compile the templates into ' +
+            'render functions, or use the compiler-included build.',
+            vm
+          );
+        } else {
+          warn(
+            'Failed to mount component: template or render function not defined.',
+            vm
+          );
+        }
+      }
+    }
+    callHook(vm, 'beforeMount');
+
+    var updateComponent;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      updateComponent = function () {
+        var name = vm._name;
+        var id = vm._uid;
+        var startTag = "vue-perf-start:" + id;
+        var endTag = "vue-perf-end:" + id;
+
+        mark(startTag);
+        var vnode = vm._render();
+        mark(endTag);
+        measure(("vue " + name + " render"), startTag, endTag);
+
+        mark(startTag);
+        vm._update(vnode, hydrating);
+        mark(endTag);
+        measure(("vue " + name + " patch"), startTag, endTag);
+      };
+    } else {
+      updateComponent = function () {
+        vm._update(vm._render(), hydrating);
+      };
+    }
+
+    // we set this to vm._watcher inside the watcher's constructor
+    // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+    // component's mounted hook), which relies on vm._watcher being already defined
+    new Watcher(vm, updateComponent, noop, {
+      before: function before () {
+        if (vm._isMounted && !vm._isDestroyed) {
+          callHook(vm, 'beforeUpdate');
+        }
+      }
+    }, true /* isRenderWatcher */);
+    hydrating = false;
+
+    // manually mounted instance, call mounted on self
+    // mounted is called for render-created child components in its inserted hook
+    if (vm.$vnode == null) {
+      vm._isMounted = true;
+      callHook(vm, 'mounted');
+    }
+    return vm
+  }
+
+  function updateChildComponent (
+    vm,
+    propsData,
+    listeners,
+    parentVnode,
+    renderChildren
+  ) {
+    {
+      isUpdatingChildComponent = true;
+    }
+
+    // determine whether component has slot children
+    // we need to do this before overwriting $options._renderChildren.
+
+    // check if there are dynamic scopedSlots (hand-written or compiled but with
+    // dynamic slot names). Static scoped slots compiled from template has the
+    // "$stable" marker.
+    var newScopedSlots = parentVnode.data.scopedSlots;
+    var oldScopedSlots = vm.$scopedSlots;
+    var hasDynamicScopedSlot = !!(
+      (newScopedSlots && !newScopedSlots.$stable) ||
+      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
+    );
+
+    // Any static slot children from the parent may have changed during parent's
+    // update. Dynamic scoped slots may also have changed. In such cases, a forced
+    // update is necessary to ensure correctness.
+    var needsForceUpdate = !!(
+      renderChildren ||               // has new static slots
+      vm.$options._renderChildren ||  // has old static slots
+      hasDynamicScopedSlot
+    );
+
+    vm.$options._parentVnode = parentVnode;
+    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+    if (vm._vnode) { // update child tree's parent
+      vm._vnode.parent = parentVnode;
+    }
+    vm.$options._renderChildren = renderChildren;
+
+    // update $attrs and $listeners hash
+    // these are also reactive so they may trigger child update if the child
+    // used them during render
+    vm.$attrs = parentVnode.data.attrs || emptyObject;
+    vm.$listeners = listeners || emptyObject;
+
+    // update props
+    if (propsData && vm.$options.props) {
+      toggleObserving(false);
+      var props = vm._props;
+      var propKeys = vm.$options._propKeys || [];
+      for (var i = 0; i < propKeys.length; i++) {
+        var key = propKeys[i];
+        var propOptions = vm.$options.props; // wtf flow?
+        props[key] = validateProp(key, propOptions, propsData, vm);
+      }
+      toggleObserving(true);
+      // keep a copy of raw propsData
+      vm.$options.propsData = propsData;
+    }
+
+    // update listeners
+    listeners = listeners || emptyObject;
+    var oldListeners = vm.$options._parentListeners;
+    vm.$options._parentListeners = listeners;
+    updateComponentListeners(vm, listeners, oldListeners);
+
+    // resolve slots + force update if has children
+    if (needsForceUpdate) {
+      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+      vm.$forceUpdate();
+    }
+
+    {
+      isUpdatingChildComponent = false;
+    }
+  }
+
+  function isInInactiveTree (vm) {
+    while (vm && (vm = vm.$parent)) {
+      if (vm._inactive) { return true }
+    }
+    return false
+  }
+
+  function activateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = false;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    } else if (vm._directInactive) {
+      return
+    }
+    if (vm._inactive || vm._inactive === null) {
+      vm._inactive = false;
+      for (var i = 0; i < vm.$children.length; i++) {
+        activateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'activated');
+    }
+  }
+
+  function deactivateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = true;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    }
+    if (!vm._inactive) {
+      vm._inactive = true;
+      for (var i = 0; i < vm.$children.length; i++) {
+        deactivateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'deactivated');
+    }
+  }
+
+  function callHook (vm, hook) {
+    // #7573 disable dep collection when invoking lifecycle hooks
+    pushTarget();
+    var handlers = vm.$options[hook];
+    var info = hook + " hook";
+    if (handlers) {
+      for (var i = 0, j = handlers.length; i < j; i++) {
+        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+      }
+    }
+    if (vm._hasHookEvent) {
+      vm.$emit('hook:' + hook);
+    }
+    popTarget();
+  }
+
+  /*  */
+
+  var MAX_UPDATE_COUNT = 100;
+
+  var queue = [];
+  var activatedChildren = [];
+  var has = {};
+  var circular = {};
+  var waiting = false;
+  var flushing = false;
+  var index = 0;
+
+  /**
+   * Reset the scheduler's state.
+   */
+  function resetSchedulerState () {
+    index = queue.length = activatedChildren.length = 0;
+    has = {};
+    {
+      circular = {};
+    }
+    waiting = flushing = false;
+  }
+
+  // Async edge case #6566 requires saving the timestamp when event listeners are
+  // attached. However, calling performance.now() has a perf overhead especially
+  // if the page has thousands of event listeners. Instead, we take a timestamp
+  // every time the scheduler flushes and use that for all event listeners
+  // attached during that flush.
+  var currentFlushTimestamp = 0;
+
+  // Async edge case fix requires storing an event listener's attach timestamp.
+  var getNow = Date.now;
+
+  // Determine what event timestamp the browser is using. Annoyingly, the
+  // timestamp can either be hi-res (relative to page load) or low-res
+  // (relative to UNIX epoch), so in order to compare time we have to use the
+  // same timestamp type when saving the flush timestamp.
+  // All IE versions use low-res event timestamps, and have problematic clock
+  // implementations (#9632)
+  if (inBrowser && !isIE) {
+    var performance = window.performance;
+    if (
+      performance &&
+      typeof performance.now === 'function' &&
+      getNow() > document.createEvent('Event').timeStamp
+    ) {
+      // if the event timestamp, although evaluated AFTER the Date.now(), is
+      // smaller than it, it means the event is using a hi-res timestamp,
+      // and we need to use the hi-res version for event listener timestamps as
+      // well.
+      getNow = function () { return performance.now(); };
+    }
+  }
+
+  /**
+   * Flush both queues and run the watchers.
+   */
+  function flushSchedulerQueue () {
+    currentFlushTimestamp = getNow();
+    flushing = true;
+    var watcher, id;
+
+    // Sort queue before flush.
+    // This ensures that:
+    // 1. Components are updated from parent to child. (because parent is always
+    //    created before the child)
+    // 2. A component's user watchers are run before its render watcher (because
+    //    user watchers are created before the render watcher)
+    // 3. If a component is destroyed during a parent component's watcher run,
+    //    its watchers can be skipped.
+    queue.sort(function (a, b) { return a.id - b.id; });
+
+    // do not cache length because more watchers might be pushed
+    // as we run existing watchers
+    for (index = 0; index < queue.length; index++) {
+      watcher = queue[index];
+      if (watcher.before) {
+        watcher.before();
+      }
+      id = watcher.id;
+      has[id] = null;
+      watcher.run();
+      // in dev build, check and stop circular updates.
+      if (has[id] != null) {
+        circular[id] = (circular[id] || 0) + 1;
+        if (circular[id] > MAX_UPDATE_COUNT) {
+          warn(
+            'You may have an infinite update loop ' + (
+              watcher.user
+                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+                : "in a component render function."
+            ),
+            watcher.vm
+          );
+          break
+        }
+      }
+    }
+
+    // keep copies of post queues before resetting state
+    var activatedQueue = activatedChildren.slice();
+    var updatedQueue = queue.slice();
+
+    resetSchedulerState();
+
+    // call component updated and activated hooks
+    callActivatedHooks(activatedQueue);
+    callUpdatedHooks(updatedQueue);
+
+    // devtool hook
+    /* istanbul ignore if */
+    if (devtools && config.devtools) {
+      devtools.emit('flush');
+    }
+  }
+
+  function callUpdatedHooks (queue) {
+    var i = queue.length;
+    while (i--) {
+      var watcher = queue[i];
+      var vm = watcher.vm;
+      if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'updated');
+      }
+    }
+  }
+
+  /**
+   * Queue a kept-alive component that was activated during patch.
+   * The queue will be processed after the entire tree has been patched.
+   */
+  function queueActivatedComponent (vm) {
+    // setting _inactive to false here so that a render function can
+    // rely on checking whether it's in an inactive tree (e.g. router-view)
+    vm._inactive = false;
+    activatedChildren.push(vm);
+  }
+
+  function callActivatedHooks (queue) {
+    for (var i = 0; i < queue.length; i++) {
+      queue[i]._inactive = true;
+      activateChildComponent(queue[i], true /* true */);
+    }
+  }
+
+  /**
+   * Push a watcher into the watcher queue.
+   * Jobs with duplicate IDs will be skipped unless it's
+   * pushed when the queue is being flushed.
+   */
+  function queueWatcher (watcher) {
+    var id = watcher.id;
+    if (has[id] == null) {
+      has[id] = true;
+      if (!flushing) {
+        queue.push(watcher);
+      } else {
+        // if already flushing, splice the watcher based on its id
+        // if already past its id, it will be run next immediately.
+        var i = queue.length - 1;
+        while (i > index && queue[i].id > watcher.id) {
+          i--;
+        }
+        queue.splice(i + 1, 0, watcher);
+      }
+      // queue the flush
+      if (!waiting) {
+        waiting = true;
+
+        if (!config.async) {
+          flushSchedulerQueue();
+          return
+        }
+        nextTick(flushSchedulerQueue);
+      }
+    }
+  }
+
+  /*  */
+
+
+
+  var uid$2 = 0;
+
+  /**
+   * A watcher parses an expression, collects dependencies,
+   * and fires callback when the expression value changes.
+   * This is used for both the $watch() api and directives.
+   */
+  var Watcher = function Watcher (
+    vm,
+    expOrFn,
+    cb,
+    options,
+    isRenderWatcher
+  ) {
+    this.vm = vm;
+    if (isRenderWatcher) {
+      vm._watcher = this;
+    }
+    vm._watchers.push(this);
+    // options
+    if (options) {
+      this.deep = !!options.deep;
+      this.user = !!options.user;
+      this.lazy = !!options.lazy;
+      this.sync = !!options.sync;
+      this.before = options.before;
+    } else {
+      this.deep = this.user = this.lazy = this.sync = false;
+    }
+    this.cb = cb;
+    this.id = ++uid$2; // uid for batching
+    this.active = true;
+    this.dirty = this.lazy; // for lazy watchers
+    this.deps = [];
+    this.newDeps = [];
+    this.depIds = new _Set();
+    this.newDepIds = new _Set();
+    this.expression = expOrFn.toString();
+    // parse expression for getter
+    if (typeof expOrFn === 'function') {
+      this.getter = expOrFn;
+    } else {
+      this.getter = parsePath(expOrFn);
+      if (!this.getter) {
+        this.getter = noop;
+        warn(
+          "Failed watching path: \"" + expOrFn + "\" " +
+          'Watcher only accepts simple dot-delimited paths. ' +
+          'For full control, use a function instead.',
+          vm
+        );
+      }
+    }
+    this.value = this.lazy
+      ? undefined
+      : this.get();
+  };
+
+  /**
+   * Evaluate the getter, and re-collect dependencies.
+   */
+  Watcher.prototype.get = function get () {
+    pushTarget(this);
+    var value;
+    var vm = this.vm;
+    try {
+      value = this.getter.call(vm, vm);
+    } catch (e) {
+      if (this.user) {
+        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+      } else {
+        throw e
+      }
+    } finally {
+      // "touch" every property so they are all tracked as
+      // dependencies for deep watching
+      if (this.deep) {
+        traverse(value);
+      }
+      popTarget();
+      this.cleanupDeps();
+    }
+    return value
+  };
+
+  /**
+   * Add a dependency to this directive.
+   */
+  Watcher.prototype.addDep = function addDep (dep) {
+    var id = dep.id;
+    if (!this.newDepIds.has(id)) {
+      this.newDepIds.add(id);
+      this.newDeps.push(dep);
+      if (!this.depIds.has(id)) {
+        dep.addSub(this);
+      }
+    }
+  };
+
+  /**
+   * Clean up for dependency collection.
+   */
+  Watcher.prototype.cleanupDeps = function cleanupDeps () {
+    var i = this.deps.length;
+    while (i--) {
+      var dep = this.deps[i];
+      if (!this.newDepIds.has(dep.id)) {
+        dep.removeSub(this);
+      }
+    }
+    var tmp = this.depIds;
+    this.depIds = this.newDepIds;
+    this.newDepIds = tmp;
+    this.newDepIds.clear();
+    tmp = this.deps;
+    this.deps = this.newDeps;
+    this.newDeps = tmp;
+    this.newDeps.length = 0;
+  };
+
+  /**
+   * Subscriber interface.
+   * Will be called when a dependency changes.
+   */
+  Watcher.prototype.update = function update () {
+    /* istanbul ignore else */
+    if (this.lazy) {
+      this.dirty = true;
+    } else if (this.sync) {
+      this.run();
+    } else {
+      queueWatcher(this);
+    }
+  };
+
+  /**
+   * Scheduler job interface.
+   * Will be called by the scheduler.
+   */
+  Watcher.prototype.run = function run () {
+    if (this.active) {
+      var value = this.get();
+      if (
+        value !== this.value ||
+        // Deep watchers and watchers on Object/Arrays should fire even
+        // when the value is the same, because the value may
+        // have mutated.
+        isObject(value) ||
+        this.deep
+      ) {
+        // set new value
+        var oldValue = this.value;
+        this.value = value;
+        if (this.user) {
+          try {
+            this.cb.call(this.vm, value, oldValue);
+          } catch (e) {
+            handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+          }
+        } else {
+          this.cb.call(this.vm, value, oldValue);
+        }
+      }
+    }
+  };
+
+  /**
+   * Evaluate the value of the watcher.
+   * This only gets called for lazy watchers.
+   */
+  Watcher.prototype.evaluate = function evaluate () {
+    this.value = this.get();
+    this.dirty = false;
+  };
+
+  /**
+   * Depend on all deps collected by this watcher.
+   */
+  Watcher.prototype.depend = function depend () {
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].depend();
+    }
+  };
+
+  /**
+   * Remove self from all dependencies' subscriber list.
+   */
+  Watcher.prototype.teardown = function teardown () {
+    if (this.active) {
+      // remove self from vm's watcher list
+      // this is a somewhat expensive operation so we skip it
+      // if the vm is being destroyed.
+      if (!this.vm._isBeingDestroyed) {
+        remove(this.vm._watchers, this);
+      }
+      var i = this.deps.length;
+      while (i--) {
+        this.deps[i].removeSub(this);
+      }
+      this.active = false;
+    }
+  };
+
+  /*  */
+
+  var sharedPropertyDefinition = {
+    enumerable: true,
+    configurable: true,
+    get: noop,
+    set: noop
+  };
+
+  function proxy (target, sourceKey, key) {
+    sharedPropertyDefinition.get = function proxyGetter () {
+      return this[sourceKey][key]
+    };
+    sharedPropertyDefinition.set = function proxySetter (val) {
+      this[sourceKey][key] = val;
+    };
+    Object.defineProperty(target, key, sharedPropertyDefinition);
+  }
+
+  function initState (vm) {
+    vm._watchers = [];
+    var opts = vm.$options;
+    if (opts.props) { initProps(vm, opts.props); }
+    if (opts.methods) { initMethods(vm, opts.methods); }
+    if (opts.data) {
+      initData(vm);
+    } else {
+      observe(vm._data = {}, true /* asRootData */);
+    }
+    if (opts.computed) { initComputed(vm, opts.computed); }
+    if (opts.watch && opts.watch !== nativeWatch) {
+      initWatch(vm, opts.watch);
+    }
+  }
+
+  function initProps (vm, propsOptions) {
+    var propsData = vm.$options.propsData || {};
+    var props = vm._props = {};
+    // cache prop keys so that future props updates can iterate using Array
+    // instead of dynamic object key enumeration.
+    var keys = vm.$options._propKeys = [];
+    var isRoot = !vm.$parent;
+    // root instance props should be converted
+    if (!isRoot) {
+      toggleObserving(false);
+    }
+    var loop = function ( key ) {
+      keys.push(key);
+      var value = validateProp(key, propsOptions, propsData, vm);
+      /* istanbul ignore else */
+      {
+        var hyphenatedKey = hyphenate(key);
+        if (isReservedAttribute(hyphenatedKey) ||
+            config.isReservedAttr(hyphenatedKey)) {
+          warn(
+            ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+            vm
+          );
+        }
+        defineReactive$$1(props, key, value, function () {
+          if (!isRoot && !isUpdatingChildComponent) {
+            warn(
+              "Avoid mutating a prop directly since the value will be " +
+              "overwritten whenever the parent component re-renders. " +
+              "Instead, use a data or computed property based on the prop's " +
+              "value. Prop being mutated: \"" + key + "\"",
+              vm
+            );
+          }
+        });
+      }
+      // static props are already proxied on the component's prototype
+      // during Vue.extend(). We only need to proxy props defined at
+      // instantiation here.
+      if (!(key in vm)) {
+        proxy(vm, "_props", key);
+      }
+    };
+
+    for (var key in propsOptions) loop( key );
+    toggleObserving(true);
+  }
+
+  function initData (vm) {
+    var data = vm.$options.data;
+    data = vm._data = typeof data === 'function'
+      ? getData(data, vm)
+      : data || {};
+    if (!isPlainObject(data)) {
+      data = {};
+      warn(
+        'data functions should return an object:\n' +
+        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+        vm
+      );
+    }
+    // proxy data on instance
+    var keys = Object.keys(data);
+    var props = vm.$options.props;
+    var methods = vm.$options.methods;
+    var i = keys.length;
+    while (i--) {
+      var key = keys[i];
+      {
+        if (methods && hasOwn(methods, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a data property."),
+            vm
+          );
+        }
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          "The data property \"" + key + "\" is already declared as a prop. " +
+          "Use prop default value instead.",
+          vm
+        );
+      } else if (!isReserved(key)) {
+        proxy(vm, "_data", key);
+      }
+    }
+    // observe data
+    observe(data, true /* asRootData */);
+  }
+
+  function getData (data, vm) {
+    // #7573 disable dep collection when invoking data getters
+    pushTarget();
+    try {
+      return data.call(vm, vm)
+    } catch (e) {
+      handleError(e, vm, "data()");
+      return {}
+    } finally {
+      popTarget();
+    }
+  }
+
+  var computedWatcherOptions = { lazy: true };
+
+  function initComputed (vm, computed) {
+    // $flow-disable-line
+    var watchers = vm._computedWatchers = Object.create(null);
+    // computed properties are just getters during SSR
+    var isSSR = isServerRendering();
+
+    for (var key in computed) {
+      var userDef = computed[key];
+      var getter = typeof userDef === 'function' ? userDef : userDef.get;
+      if (getter == null) {
+        warn(
+          ("Getter is missing for computed property \"" + key + "\"."),
+          vm
+        );
+      }
+
+      if (!isSSR) {
+        // create internal watcher for the computed property.
+        watchers[key] = new Watcher(
+          vm,
+          getter || noop,
+          noop,
+          computedWatcherOptions
+        );
+      }
+
+      // component-defined computed properties are already defined on the
+      // component prototype. We only need to define computed properties defined
+      // at instantiation here.
+      if (!(key in vm)) {
+        defineComputed(vm, key, userDef);
+      } else {
+        if (key in vm.$data) {
+          warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+        } else if (vm.$options.props && key in vm.$options.props) {
+          warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+        }
+      }
+    }
+  }
+
+  function defineComputed (
+    target,
+    key,
+    userDef
+  ) {
+    var shouldCache = !isServerRendering();
+    if (typeof userDef === 'function') {
+      sharedPropertyDefinition.get = shouldCache
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef);
+      sharedPropertyDefinition.set = noop;
+    } else {
+      sharedPropertyDefinition.get = userDef.get
+        ? shouldCache && userDef.cache !== false
+          ? createComputedGetter(key)
+          : createGetterInvoker(userDef.get)
+        : noop;
+      sharedPropertyDefinition.set = userDef.set || noop;
+    }
+    if (sharedPropertyDefinition.set === noop) {
+      sharedPropertyDefinition.set = function () {
+        warn(
+          ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+          this
+        );
+      };
+    }
+    Object.defineProperty(target, key, sharedPropertyDefinition);
+  }
+
+  function createComputedGetter (key) {
+    return function computedGetter () {
+      var watcher = this._computedWatchers && this._computedWatchers[key];
+      if (watcher) {
+        if (watcher.dirty) {
+          watcher.evaluate();
+        }
+        if (Dep.target) {
+          watcher.depend();
+        }
+        return watcher.value
+      }
+    }
+  }
+
+  function createGetterInvoker(fn) {
+    return function computedGetter () {
+      return fn.call(this, this)
+    }
+  }
+
+  function initMethods (vm, methods) {
+    var props = vm.$options.props;
+    for (var key in methods) {
+      {
+        if (typeof methods[key] !== 'function') {
+          warn(
+            "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+            "Did you reference the function correctly?",
+            vm
+          );
+        }
+        if (props && hasOwn(props, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a prop."),
+            vm
+          );
+        }
+        if ((key in vm) && isReserved(key)) {
+          warn(
+            "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+            "Avoid defining component methods that start with _ or $."
+          );
+        }
+      }
+      vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+    }
+  }
+
+  function initWatch (vm, watch) {
+    for (var key in watch) {
+      var handler = watch[key];
+      if (Array.isArray(handler)) {
+        for (var i = 0; i < handler.length; i++) {
+          createWatcher(vm, key, handler[i]);
+        }
+      } else {
+        createWatcher(vm, key, handler);
+      }
+    }
+  }
+
+  function createWatcher (
+    vm,
+    expOrFn,
+    handler,
+    options
+  ) {
+    if (isPlainObject(handler)) {
+      options = handler;
+      handler = handler.handler;
+    }
+    if (typeof handler === 'string') {
+      handler = vm[handler];
+    }
+    return vm.$watch(expOrFn, handler, options)
+  }
+
+  function stateMixin (Vue) {
+    // flow somehow has problems with directly declared definition object
+    // when using Object.defineProperty, so we have to procedurally build up
+    // the object here.
+    var dataDef = {};
+    dataDef.get = function () { return this._data };
+    var propsDef = {};
+    propsDef.get = function () { return this._props };
+    {
+      dataDef.set = function () {
+        warn(
+          'Avoid replacing instance root $data. ' +
+          'Use nested data properties instead.',
+          this
+        );
+      };
+      propsDef.set = function () {
+        warn("$props is readonly.", this);
+      };
+    }
+    Object.defineProperty(Vue.prototype, '$data', dataDef);
+    Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+    Vue.prototype.$set = set;
+    Vue.prototype.$delete = del;
+
+    Vue.prototype.$watch = function (
+      expOrFn,
+      cb,
+      options
+    ) {
+      var vm = this;
+      if (isPlainObject(cb)) {
+        return createWatcher(vm, expOrFn, cb, options)
+      }
+      options = options || {};
+      options.user = true;
+      var watcher = new Watcher(vm, expOrFn, cb, options);
+      if (options.immediate) {
+        try {
+          cb.call(vm, watcher.value);
+        } catch (error) {
+          handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
+        }
+      }
+      return function unwatchFn () {
+        watcher.teardown();
+      }
+    };
+  }
+
+  /*  */
+
+  var uid$3 = 0;
+
+  function initMixin (Vue) {
+    Vue.prototype._init = function (options) {
+      var vm = this;
+      // a uid
+      vm._uid = uid$3++;
+
+      var startTag, endTag;
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        startTag = "vue-perf-start:" + (vm._uid);
+        endTag = "vue-perf-end:" + (vm._uid);
+        mark(startTag);
+      }
+
+      // a flag to avoid this being observed
+      vm._isVue = true;
+      // merge options
+      if (options && options._isComponent) {
+        // optimize internal component instantiation
+        // since dynamic options merging is pretty slow, and none of the
+        // internal component options needs special treatment.
+        initInternalComponent(vm, options);
+      } else {
+        vm.$options = mergeOptions(
+          resolveConstructorOptions(vm.constructor),
+          options || {},
+          vm
+        );
+      }
+      /* istanbul ignore else */
+      {
+        initProxy(vm);
+      }
+      // expose real self
+      vm._self = vm;
+      initLifecycle(vm);
+      initEvents(vm);
+      initRender(vm);
+      callHook(vm, 'beforeCreate');
+      initInjections(vm); // resolve injections before data/props
+      initState(vm);
+      initProvide(vm); // resolve provide after data/props
+      callHook(vm, 'created');
+
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        vm._name = formatComponentName(vm, false);
+        mark(endTag);
+        measure(("vue " + (vm._name) + " init"), startTag, endTag);
+      }
+
+      if (vm.$options.el) {
+        vm.$mount(vm.$options.el);
+      }
+    };
+  }
+
+  function initInternalComponent (vm, options) {
+    var opts = vm.$options = Object.create(vm.constructor.options);
+    // doing this because it's faster than dynamic enumeration.
+    var parentVnode = options._parentVnode;
+    opts.parent = options.parent;
+    opts._parentVnode = parentVnode;
+
+    var vnodeComponentOptions = parentVnode.componentOptions;
+    opts.propsData = vnodeComponentOptions.propsData;
+    opts._parentListeners = vnodeComponentOptions.listeners;
+    opts._renderChildren = vnodeComponentOptions.children;
+    opts._componentTag = vnodeComponentOptions.tag;
+
+    if (options.render) {
+      opts.render = options.render;
+      opts.staticRenderFns = options.staticRenderFns;
+    }
+  }
+
+  function resolveConstructorOptions (Ctor) {
+    var options = Ctor.options;
+    if (Ctor.super) {
+      var superOptions = resolveConstructorOptions(Ctor.super);
+      var cachedSuperOptions = Ctor.superOptions;
+      if (superOptions !== cachedSuperOptions) {
+        // super option changed,
+        // need to resolve new options.
+        Ctor.superOptions = superOptions;
+        // check if there are any late-modified/attached options (#4976)
+        var modifiedOptions = resolveModifiedOptions(Ctor);
+        // update base extend options
+        if (modifiedOptions) {
+          extend(Ctor.extendOptions, modifiedOptions);
+        }
+        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+        if (options.name) {
+          options.components[options.name] = Ctor;
+        }
+      }
+    }
+    return options
+  }
+
+  function resolveModifiedOptions (Ctor) {
+    var modified;
+    var latest = Ctor.options;
+    var sealed = Ctor.sealedOptions;
+    for (var key in latest) {
+      if (latest[key] !== sealed[key]) {
+        if (!modified) { modified = {}; }
+        modified[key] = latest[key];
+      }
+    }
+    return modified
+  }
+
+  function Vue (options) {
+    if (!(this instanceof Vue)
+    ) {
+      warn('Vue is a constructor and should be called with the `new` keyword');
+    }
+    this._init(options);
+  }
+
+  initMixin(Vue);
+  stateMixin(Vue);
+  eventsMixin(Vue);
+  lifecycleMixin(Vue);
+  renderMixin(Vue);
+
+  /*  */
+
+  function initUse (Vue) {
+    Vue.use = function (plugin) {
+      var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+      if (installedPlugins.indexOf(plugin) > -1) {
+        return this
+      }
+
+      // additional parameters
+      var args = toArray(arguments, 1);
+      args.unshift(this);
+      if (typeof plugin.install === 'function') {
+        plugin.install.apply(plugin, args);
+      } else if (typeof plugin === 'function') {
+        plugin.apply(null, args);
+      }
+      installedPlugins.push(plugin);
+      return this
+    };
+  }
+
+  /*  */
+
+  function initMixin$1 (Vue) {
+    Vue.mixin = function (mixin) {
+      this.options = mergeOptions(this.options, mixin);
+      return this
+    };
+  }
+
+  /*  */
+
+  function initExtend (Vue) {
+    /**
+     * Each instance constructor, including Vue, has a unique
+     * cid. This enables us to create wrapped "child
+     * constructors" for prototypal inheritance and cache them.
+     */
+    Vue.cid = 0;
+    var cid = 1;
+
+    /**
+     * Class inheritance
+     */
+    Vue.extend = function (extendOptions) {
+      extendOptions = extendOptions || {};
+      var Super = this;
+      var SuperId = Super.cid;
+      var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+      if (cachedCtors[SuperId]) {
+        return cachedCtors[SuperId]
+      }
+
+      var name = extendOptions.name || Super.options.name;
+      if (name) {
+        validateComponentName(name);
+      }
+
+      var Sub = function VueComponent (options) {
+        this._init(options);
+      };
+      Sub.prototype = Object.create(Super.prototype);
+      Sub.prototype.constructor = Sub;
+      Sub.cid = cid++;
+      Sub.options = mergeOptions(
+        Super.options,
+        extendOptions
+      );
+      Sub['super'] = Super;
+
+      // For props and computed properties, we define the proxy getters on
+      // the Vue instances at extension time, on the extended prototype. This
+      // avoids Object.defineProperty calls for each instance created.
+      if (Sub.options.props) {
+        initProps$1(Sub);
+      }
+      if (Sub.options.computed) {
+        initComputed$1(Sub);
+      }
+
+      // allow further extension/mixin/plugin usage
+      Sub.extend = Super.extend;
+      Sub.mixin = Super.mixin;
+      Sub.use = Super.use;
+
+      // create asset registers, so extended classes
+      // can have their private assets too.
+      ASSET_TYPES.forEach(function (type) {
+        Sub[type] = Super[type];
+      });
+      // enable recursive self-lookup
+      if (name) {
+        Sub.options.components[name] = Sub;
+      }
+
+      // keep a reference to the super options at extension time.
+      // later at instantiation we can check if Super's options have
+      // been updated.
+      Sub.superOptions = Super.options;
+      Sub.extendOptions = extendOptions;
+      Sub.sealedOptions = extend({}, Sub.options);
+
+      // cache constructor
+      cachedCtors[SuperId] = Sub;
+      return Sub
+    };
+  }
+
+  function initProps$1 (Comp) {
+    var props = Comp.options.props;
+    for (var key in props) {
+      proxy(Comp.prototype, "_props", key);
+    }
+  }
+
+  function initComputed$1 (Comp) {
+    var computed = Comp.options.computed;
+    for (var key in computed) {
+      defineComputed(Comp.prototype, key, computed[key]);
+    }
+  }
+
+  /*  */
+
+  function initAssetRegisters (Vue) {
+    /**
+     * Create asset registration methods.
+     */
+    ASSET_TYPES.forEach(function (type) {
+      Vue[type] = function (
+        id,
+        definition
+      ) {
+        if (!definition) {
+          return this.options[type + 's'][id]
+        } else {
+          /* istanbul ignore if */
+          if (type === 'component') {
+            validateComponentName(id);
+          }
+          if (type === 'component' && isPlainObject(definition)) {
+            definition.name = definition.name || id;
+            definition = this.options._base.extend(definition);
+          }
+          if (type === 'directive' && typeof definition === 'function') {
+            definition = { bind: definition, update: definition };
+          }
+          this.options[type + 's'][id] = definition;
+          return definition
+        }
+      };
+    });
+  }
+
+  /*  */
+
+
+
+  function getComponentName (opts) {
+    return opts && (opts.Ctor.options.name || opts.tag)
+  }
+
+  function matches (pattern, name) {
+    if (Array.isArray(pattern)) {
+      return pattern.indexOf(name) > -1
+    } else if (typeof pattern === 'string') {
+      return pattern.split(',').indexOf(name) > -1
+    } else if (isRegExp(pattern)) {
+      return pattern.test(name)
+    }
+    /* istanbul ignore next */
+    return false
+  }
+
+  function pruneCache (keepAliveInstance, filter) {
+    var cache = keepAliveInstance.cache;
+    var keys = keepAliveInstance.keys;
+    var _vnode = keepAliveInstance._vnode;
+    for (var key in cache) {
+      var cachedNode = cache[key];
+      if (cachedNode) {
+        var name = getComponentName(cachedNode.componentOptions);
+        if (name && !filter(name)) {
+          pruneCacheEntry(cache, key, keys, _vnode);
+        }
+      }
+    }
+  }
+
+  function pruneCacheEntry (
+    cache,
+    key,
+    keys,
+    current
+  ) {
+    var cached$$1 = cache[key];
+    if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
+      cached$$1.componentInstance.$destroy();
+    }
+    cache[key] = null;
+    remove(keys, key);
+  }
+
+  var patternTypes = [String, RegExp, Array];
+
+  var KeepAlive = {
+    name: 'keep-alive',
+    abstract: true,
+
+    props: {
+      include: patternTypes,
+      exclude: patternTypes,
+      max: [String, Number]
+    },
+
+    created: function created () {
+      this.cache = Object.create(null);
+      this.keys = [];
+    },
+
+    destroyed: function destroyed () {
+      for (var key in this.cache) {
+        pruneCacheEntry(this.cache, key, this.keys);
+      }
+    },
+
+    mounted: function mounted () {
+      var this$1 = this;
+
+      this.$watch('include', function (val) {
+        pruneCache(this$1, function (name) { return matches(val, name); });
+      });
+      this.$watch('exclude', function (val) {
+        pruneCache(this$1, function (name) { return !matches(val, name); });
+      });
+    },
+
+    render: function render () {
+      var slot = this.$slots.default;
+      var vnode = getFirstComponentChild(slot);
+      var componentOptions = vnode && vnode.componentOptions;
+      if (componentOptions) {
+        // check pattern
+        var name = getComponentName(componentOptions);
+        var ref = this;
+        var include = ref.include;
+        var exclude = ref.exclude;
+        if (
+          // not included
+          (include && (!name || !matches(include, name))) ||
+          // excluded
+          (exclude && name && matches(exclude, name))
+        ) {
+          return vnode
+        }
+
+        var ref$1 = this;
+        var cache = ref$1.cache;
+        var keys = ref$1.keys;
+        var key = vnode.key == null
+          // same constructor may get registered as different local components
+          // so cid alone is not enough (#3269)
+          ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+          : vnode.key;
+        if (cache[key]) {
+          vnode.componentInstance = cache[key].componentInstance;
+          // make current key freshest
+          remove(keys, key);
+          keys.push(key);
+        } else {
+          cache[key] = vnode;
+          keys.push(key);
+          // prune oldest entry
+          if (this.max && keys.length > parseInt(this.max)) {
+            pruneCacheEntry(cache, keys[0], keys, this._vnode);
+          }
+        }
+
+        vnode.data.keepAlive = true;
+      }
+      return vnode || (slot && slot[0])
+    }
+  };
+
+  var builtInComponents = {
+    KeepAlive: KeepAlive
+  };
+
+  /*  */
+
+  function initGlobalAPI (Vue) {
+    // config
+    var configDef = {};
+    configDef.get = function () { return config; };
+    {
+      configDef.set = function () {
+        warn(
+          'Do not replace the Vue.config object, set individual fields instead.'
+        );
+      };
+    }
+    Object.defineProperty(Vue, 'config', configDef);
+
+    // exposed util methods.
+    // NOTE: these are not considered part of the public API - avoid relying on
+    // them unless you are aware of the risk.
+    Vue.util = {
+      warn: warn,
+      extend: extend,
+      mergeOptions: mergeOptions,
+      defineReactive: defineReactive$$1
+    };
+
+    Vue.set = set;
+    Vue.delete = del;
+    Vue.nextTick = nextTick;
+
+    // 2.6 explicit observable API
+    Vue.observable = function (obj) {
+      observe(obj);
+      return obj
+    };
+
+    Vue.options = Object.create(null);
+    ASSET_TYPES.forEach(function (type) {
+      Vue.options[type + 's'] = Object.create(null);
+    });
+
+    // this is used to identify the "base" constructor to extend all plain-object
+    // components with in Weex's multi-instance scenarios.
+    Vue.options._base = Vue;
+
+    extend(Vue.options.components, builtInComponents);
+
+    initUse(Vue);
+    initMixin$1(Vue);
+    initExtend(Vue);
+    initAssetRegisters(Vue);
+  }
+
+  initGlobalAPI(Vue);
+
+  Object.defineProperty(Vue.prototype, '$isServer', {
+    get: isServerRendering
+  });
+
+  Object.defineProperty(Vue.prototype, '$ssrContext', {
+    get: function get () {
+      /* istanbul ignore next */
+      return this.$vnode && this.$vnode.ssrContext
+    }
+  });
+
+  // expose FunctionalRenderContext for ssr runtime helper installation
+  Object.defineProperty(Vue, 'FunctionalRenderContext', {
+    value: FunctionalRenderContext
+  });
+
+  Vue.version = '2.6.12';
+
+  /*  */
+
+  // these are reserved for web because they are directly compiled away
+  // during template compilation
+  var isReservedAttr = makeMap('style,class');
+
+  // attributes that should be using props for binding
+  var acceptValue = makeMap('input,textarea,option,select,progress');
+  var mustUseProp = function (tag, type, attr) {
+    return (
+      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+      (attr === 'selected' && tag === 'option') ||
+      (attr === 'checked' && tag === 'input') ||
+      (attr === 'muted' && tag === 'video')
+    )
+  };
+
+  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+  var convertEnumeratedValue = function (key, value) {
+    return isFalsyAttrValue(value) || value === 'false'
+      ? 'false'
+      // allow arbitrary string value for contenteditable
+      : key === 'contenteditable' && isValidContentEditableValue(value)
+        ? value
+        : 'true'
+  };
+
+  var isBooleanAttr = makeMap(
+    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+    'required,reversed,scoped,seamless,selected,sortable,translate,' +
+    'truespeed,typemustmatch,visible'
+  );
+
+  var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+  var isXlink = function (name) {
+    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+  };
+
+  var getXlinkProp = function (name) {
+    return isXlink(name) ? name.slice(6, name.length) : ''
+  };
+
+  var isFalsyAttrValue = function (val) {
+    return val == null || val === false
+  };
+
+  /*  */
+
+  function genClassForVnode (vnode) {
+    var data = vnode.data;
+    var parentNode = vnode;
+    var childNode = vnode;
+    while (isDef(childNode.componentInstance)) {
+      childNode = childNode.componentInstance._vnode;
+      if (childNode && childNode.data) {
+        data = mergeClassData(childNode.data, data);
+      }
+    }
+    while (isDef(parentNode = parentNode.parent)) {
+      if (parentNode && parentNode.data) {
+        data = mergeClassData(data, parentNode.data);
+      }
+    }
+    return renderClass(data.staticClass, data.class)
+  }
+
+  function mergeClassData (child, parent) {
+    return {
+      staticClass: concat(child.staticClass, parent.staticClass),
+      class: isDef(child.class)
+        ? [child.class, parent.class]
+        : parent.class
+    }
+  }
+
+  function renderClass (
+    staticClass,
+    dynamicClass
+  ) {
+    if (isDef(staticClass) || isDef(dynamicClass)) {
+      return concat(staticClass, stringifyClass(dynamicClass))
+    }
+    /* istanbul ignore next */
+    return ''
+  }
+
+  function concat (a, b) {
+    return a ? b ? (a + ' ' + b) : a : (b || '')
+  }
+
+  function stringifyClass (value) {
+    if (Array.isArray(value)) {
+      return stringifyArray(value)
+    }
+    if (isObject(value)) {
+      return stringifyObject(value)
+    }
+    if (typeof value === 'string') {
+      return value
+    }
+    /* istanbul ignore next */
+    return ''
+  }
+
+  function stringifyArray (value) {
+    var res = '';
+    var stringified;
+    for (var i = 0, l = value.length; i < l; i++) {
+      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+        if (res) { res += ' '; }
+        res += stringified;
+      }
+    }
+    return res
+  }
+
+  function stringifyObject (value) {
+    var res = '';
+    for (var key in value) {
+      if (value[key]) {
+        if (res) { res += ' '; }
+        res += key;
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  var namespaceMap = {
+    svg: 'http://www.w3.org/2000/svg',
+    math: 'http://www.w3.org/1998/Math/MathML'
+  };
+
+  var isHTMLTag = makeMap(
+    'html,body,base,head,link,meta,style,title,' +
+    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+    'embed,object,param,source,canvas,script,noscript,del,ins,' +
+    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+    'output,progress,select,textarea,' +
+    'details,dialog,menu,menuitem,summary,' +
+    'content,element,shadow,template,blockquote,iframe,tfoot'
+  );
+
+  // this map is intentionally selective, only covering SVG elements that may
+  // contain child elements.
+  var isSVG = makeMap(
+    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+    'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+    true
+  );
+
+  var isReservedTag = function (tag) {
+    return isHTMLTag(tag) || isSVG(tag)
+  };
+
+  function getTagNamespace (tag) {
+    if (isSVG(tag)) {
+      return 'svg'
+    }
+    // basic support for MathML
+    // note it doesn't support other MathML elements being component roots
+    if (tag === 'math') {
+      return 'math'
+    }
+  }
+
+  var unknownElementCache = Object.create(null);
+  function isUnknownElement (tag) {
+    /* istanbul ignore if */
+    if (!inBrowser) {
+      return true
+    }
+    if (isReservedTag(tag)) {
+      return false
+    }
+    tag = tag.toLowerCase();
+    /* istanbul ignore if */
+    if (unknownElementCache[tag] != null) {
+      return unknownElementCache[tag]
+    }
+    var el = document.createElement(tag);
+    if (tag.indexOf('-') > -1) {
+      // http://stackoverflow.com/a/28210364/1070244
+      return (unknownElementCache[tag] = (
+        el.constructor === window.HTMLUnknownElement ||
+        el.constructor === window.HTMLElement
+      ))
+    } else {
+      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+    }
+  }
+
+  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+  /*  */
+
+  /**
+   * Query an element selector if it's not an element already.
+   */
+  function query (el) {
+    if (typeof el === 'string') {
+      var selected = document.querySelector(el);
+      if (!selected) {
+        warn(
+          'Cannot find element: ' + el
+        );
+        return document.createElement('div')
+      }
+      return selected
+    } else {
+      return el
+    }
+  }
+
+  /*  */
+
+  function createElement$1 (tagName, vnode) {
+    var elm = document.createElement(tagName);
+    if (tagName !== 'select') {
+      return elm
+    }
+    // false or null will remove the attribute but undefined will not
+    if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+      elm.setAttribute('multiple', 'multiple');
+    }
+    return elm
+  }
+
+  function createElementNS (namespace, tagName) {
+    return document.createElementNS(namespaceMap[namespace], tagName)
+  }
+
+  function createTextNode (text) {
+    return document.createTextNode(text)
+  }
+
+  function createComment (text) {
+    return document.createComment(text)
+  }
+
+  function insertBefore (parentNode, newNode, referenceNode) {
+    parentNode.insertBefore(newNode, referenceNode);
+  }
+
+  function removeChild (node, child) {
+    node.removeChild(child);
+  }
+
+  function appendChild (node, child) {
+    node.appendChild(child);
+  }
+
+  function parentNode (node) {
+    return node.parentNode
+  }
+
+  function nextSibling (node) {
+    return node.nextSibling
+  }
+
+  function tagName (node) {
+    return node.tagName
+  }
+
+  function setTextContent (node, text) {
+    node.textContent = text;
+  }
+
+  function setStyleScope (node, scopeId) {
+    node.setAttribute(scopeId, '');
+  }
+
+  var nodeOps = /*#__PURE__*/Object.freeze({
+    createElement: createElement$1,
+    createElementNS: createElementNS,
+    createTextNode: createTextNode,
+    createComment: createComment,
+    insertBefore: insertBefore,
+    removeChild: removeChild,
+    appendChild: appendChild,
+    parentNode: parentNode,
+    nextSibling: nextSibling,
+    tagName: tagName,
+    setTextContent: setTextContent,
+    setStyleScope: setStyleScope
+  });
+
+  /*  */
+
+  var ref = {
+    create: function create (_, vnode) {
+      registerRef(vnode);
+    },
+    update: function update (oldVnode, vnode) {
+      if (oldVnode.data.ref !== vnode.data.ref) {
+        registerRef(oldVnode, true);
+        registerRef(vnode);
+      }
+    },
+    destroy: function destroy (vnode) {
+      registerRef(vnode, true);
+    }
+  };
+
+  function registerRef (vnode, isRemoval) {
+    var key = vnode.data.ref;
+    if (!isDef(key)) { return }
+
+    var vm = vnode.context;
+    var ref = vnode.componentInstance || vnode.elm;
+    var refs = vm.$refs;
+    if (isRemoval) {
+      if (Array.isArray(refs[key])) {
+        remove(refs[key], ref);
+      } else if (refs[key] === ref) {
+        refs[key] = undefined;
+      }
+    } else {
+      if (vnode.data.refInFor) {
+        if (!Array.isArray(refs[key])) {
+          refs[key] = [ref];
+        } else if (refs[key].indexOf(ref) < 0) {
+          // $flow-disable-line
+          refs[key].push(ref);
+        }
+      } else {
+        refs[key] = ref;
+      }
+    }
+  }
+
+  /**
+   * Virtual DOM patching algorithm based on Snabbdom by
+   * Simon Friis Vindum (@paldepind)
+   * Licensed under the MIT License
+   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+   *
+   * modified by Evan You (@yyx990803)
+   *
+   * Not type-checking this because this file is perf-critical and the cost
+   * of making flow understand it is not worth it.
+   */
+
+  var emptyNode = new VNode('', {}, []);
+
+  var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+  function sameVnode (a, b) {
+    return (
+      a.key === b.key && (
+        (
+          a.tag === b.tag &&
+          a.isComment === b.isComment &&
+          isDef(a.data) === isDef(b.data) &&
+          sameInputType(a, b)
+        ) || (
+          isTrue(a.isAsyncPlaceholder) &&
+          a.asyncFactory === b.asyncFactory &&
+          isUndef(b.asyncFactory.error)
+        )
+      )
+    )
+  }
+
+  function sameInputType (a, b) {
+    if (a.tag !== 'input') { return true }
+    var i;
+    var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+    var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+    return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+  }
+
+  function createKeyToOldIdx (children, beginIdx, endIdx) {
+    var i, key;
+    var map = {};
+    for (i = beginIdx; i <= endIdx; ++i) {
+      key = children[i].key;
+      if (isDef(key)) { map[key] = i; }
+    }
+    return map
+  }
+
+  function createPatchFunction (backend) {
+    var i, j;
+    var cbs = {};
+
+    var modules = backend.modules;
+    var nodeOps = backend.nodeOps;
+
+    for (i = 0; i < hooks.length; ++i) {
+      cbs[hooks[i]] = [];
+      for (j = 0; j < modules.length; ++j) {
+        if (isDef(modules[j][hooks[i]])) {
+          cbs[hooks[i]].push(modules[j][hooks[i]]);
+        }
+      }
+    }
+
+    function emptyNodeAt (elm) {
+      return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    }
+
+    function createRmCb (childElm, listeners) {
+      function remove$$1 () {
+        if (--remove$$1.listeners === 0) {
+          removeNode(childElm);
+        }
+      }
+      remove$$1.listeners = listeners;
+      return remove$$1
+    }
+
+    function removeNode (el) {
+      var parent = nodeOps.parentNode(el);
+      // element may have already been removed due to v-html / v-text
+      if (isDef(parent)) {
+        nodeOps.removeChild(parent, el);
+      }
+    }
+
+    function isUnknownElement$$1 (vnode, inVPre) {
+      return (
+        !inVPre &&
+        !vnode.ns &&
+        !(
+          config.ignoredElements.length &&
+          config.ignoredElements.some(function (ignore) {
+            return isRegExp(ignore)
+              ? ignore.test(vnode.tag)
+              : ignore === vnode.tag
+          })
+        ) &&
+        config.isUnknownElement(vnode.tag)
+      )
+    }
+
+    var creatingElmInVPre = 0;
+
+    function createElm (
+      vnode,
+      insertedVnodeQueue,
+      parentElm,
+      refElm,
+      nested,
+      ownerArray,
+      index
+    ) {
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // This vnode was used in a previous render!
+        // now it's used as a new node, overwriting its elm would cause
+        // potential patch errors down the road when it's used as an insertion
+        // reference node. Instead, we clone the node on-demand before creating
+        // associated DOM element for it.
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
+
+      vnode.isRootInsert = !nested; // for transition enter check
+      if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+        return
+      }
+
+      var data = vnode.data;
+      var children = vnode.children;
+      var tag = vnode.tag;
+      if (isDef(tag)) {
+        {
+          if (data && data.pre) {
+            creatingElmInVPre++;
+          }
+          if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+            warn(
+              'Unknown custom element: <' + tag + '> - did you ' +
+              'register the component correctly? For recursive components, ' +
+              'make sure to provide the "name" option.',
+              vnode.context
+            );
+          }
+        }
+
+        vnode.elm = vnode.ns
+          ? nodeOps.createElementNS(vnode.ns, tag)
+          : nodeOps.createElement(tag, vnode);
+        setScope(vnode);
+
+        /* istanbul ignore if */
+        {
+          createChildren(vnode, children, insertedVnodeQueue);
+          if (isDef(data)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+          }
+          insert(parentElm, vnode.elm, refElm);
+        }
+
+        if (data && data.pre) {
+          creatingElmInVPre--;
+        }
+      } else if (isTrue(vnode.isComment)) {
+        vnode.elm = nodeOps.createComment(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
+      } else {
+        vnode.elm = nodeOps.createTextNode(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
+      }
+    }
+
+    function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i = vnode.data;
+      if (isDef(i)) {
+        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+        if (isDef(i = i.hook) && isDef(i = i.init)) {
+          i(vnode, false /* hydrating */);
+        }
+        // after calling the init hook, if the vnode is a child component
+        // it should've created a child instance and mounted it. the child
+        // component also has set the placeholder vnode's elm.
+        // in that case we can just return the element and be done.
+        if (isDef(vnode.componentInstance)) {
+          initComponent(vnode, insertedVnodeQueue);
+          insert(parentElm, vnode.elm, refElm);
+          if (isTrue(isReactivated)) {
+            reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+          }
+          return true
+        }
+      }
+    }
+
+    function initComponent (vnode, insertedVnodeQueue) {
+      if (isDef(vnode.data.pendingInsert)) {
+        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+        vnode.data.pendingInsert = null;
+      }
+      vnode.elm = vnode.componentInstance.$el;
+      if (isPatchable(vnode)) {
+        invokeCreateHooks(vnode, insertedVnodeQueue);
+        setScope(vnode);
+      } else {
+        // empty component root.
+        // skip all element-related modules except for ref (#3455)
+        registerRef(vnode);
+        // make sure to invoke the insert hook
+        insertedVnodeQueue.push(vnode);
+      }
+    }
+
+    function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i;
+      // hack for #4339: a reactivated component with inner transition
+      // does not trigger because the inner node's created hooks are not called
+      // again. It's not ideal to involve module-specific logic in here but
+      // there doesn't seem to be a better way to do it.
+      var innerNode = vnode;
+      while (innerNode.componentInstance) {
+        innerNode = innerNode.componentInstance._vnode;
+        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+          for (i = 0; i < cbs.activate.length; ++i) {
+            cbs.activate[i](emptyNode, innerNode);
+          }
+          insertedVnodeQueue.push(innerNode);
+          break
+        }
+      }
+      // unlike a newly created component,
+      // a reactivated keep-alive component doesn't insert itself
+      insert(parentElm, vnode.elm, refElm);
+    }
+
+    function insert (parent, elm, ref$$1) {
+      if (isDef(parent)) {
+        if (isDef(ref$$1)) {
+          if (nodeOps.parentNode(ref$$1) === parent) {
+            nodeOps.insertBefore(parent, elm, ref$$1);
+          }
+        } else {
+          nodeOps.appendChild(parent, elm);
+        }
+      }
+    }
+
+    function createChildren (vnode, children, insertedVnodeQueue) {
+      if (Array.isArray(children)) {
+        {
+          checkDuplicateKeys(children);
+        }
+        for (var i = 0; i < children.length; ++i) {
+          createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+        }
+      } else if (isPrimitive(vnode.text)) {
+        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+      }
+    }
+
+    function isPatchable (vnode) {
+      while (vnode.componentInstance) {
+        vnode = vnode.componentInstance._vnode;
+      }
+      return isDef(vnode.tag)
+    }
+
+    function invokeCreateHooks (vnode, insertedVnodeQueue) {
+      for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+        cbs.create[i$1](emptyNode, vnode);
+      }
+      i = vnode.data.hook; // Reuse variable
+      if (isDef(i)) {
+        if (isDef(i.create)) { i.create(emptyNode, vnode); }
+        if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+      }
+    }
+
+    // set scope id attribute for scoped CSS.
+    // this is implemented as a special case to avoid the overhead
+    // of going through the normal attribute patching process.
+    function setScope (vnode) {
+      var i;
+      if (isDef(i = vnode.fnScopeId)) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      } else {
+        var ancestor = vnode;
+        while (ancestor) {
+          if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+            nodeOps.setStyleScope(vnode.elm, i);
+          }
+          ancestor = ancestor.parent;
+        }
+      }
+      // for slot content they should also get the scopeId from the host instance.
+      if (isDef(i = activeInstance) &&
+        i !== vnode.context &&
+        i !== vnode.fnContext &&
+        isDef(i = i.$options._scopeId)
+      ) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      }
+    }
+
+    function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+      }
+    }
+
+    function invokeDestroyHook (vnode) {
+      var i, j;
+      var data = vnode.data;
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+        for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+      }
+      if (isDef(i = vnode.children)) {
+        for (j = 0; j < vnode.children.length; ++j) {
+          invokeDestroyHook(vnode.children[j]);
+        }
+      }
+    }
+
+    function removeVnodes (vnodes, startIdx, endIdx) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        var ch = vnodes[startIdx];
+        if (isDef(ch)) {
+          if (isDef(ch.tag)) {
+            removeAndInvokeRemoveHook(ch);
+            invokeDestroyHook(ch);
+          } else { // Text node
+            removeNode(ch.elm);
+          }
+        }
+      }
+    }
+
+    function removeAndInvokeRemoveHook (vnode, rm) {
+      if (isDef(rm) || isDef(vnode.data)) {
+        var i;
+        var listeners = cbs.remove.length + 1;
+        if (isDef(rm)) {
+          // we have a recursively passed down rm callback
+          // increase the listeners count
+          rm.listeners += listeners;
+        } else {
+          // directly removing
+          rm = createRmCb(vnode.elm, listeners);
+        }
+        // recursively invoke hooks on child component root node
+        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+          removeAndInvokeRemoveHook(i, rm);
+        }
+        for (i = 0; i < cbs.remove.length; ++i) {
+          cbs.remove[i](vnode, rm);
+        }
+        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+          i(vnode, rm);
+        } else {
+          rm();
+        }
+      } else {
+        removeNode(vnode.elm);
+      }
+    }
+
+    function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+      var oldStartIdx = 0;
+      var newStartIdx = 0;
+      var oldEndIdx = oldCh.length - 1;
+      var oldStartVnode = oldCh[0];
+      var oldEndVnode = oldCh[oldEndIdx];
+      var newEndIdx = newCh.length - 1;
+      var newStartVnode = newCh[0];
+      var newEndVnode = newCh[newEndIdx];
+      var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+      // removeOnly is a special flag used only by <transition-group>
+      // to ensure removed elements stay in correct relative positions
+      // during leaving transitions
+      var canMove = !removeOnly;
+
+      {
+        checkDuplicateKeys(newCh);
+      }
+
+      while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+        if (isUndef(oldStartVnode)) {
+          oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+        } else if (isUndef(oldEndVnode)) {
+          oldEndVnode = oldCh[--oldEndIdx];
+        } else if (sameVnode(oldStartVnode, newStartVnode)) {
+          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          oldStartVnode = oldCh[++oldStartIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else if (sameVnode(oldEndVnode, newEndVnode)) {
+          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+          oldStartVnode = oldCh[++oldStartIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else {
+          if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+          idxInOld = isDef(newStartVnode.key)
+            ? oldKeyToIdx[newStartVnode.key]
+            : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+          if (isUndef(idxInOld)) { // New element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          } else {
+            vnodeToMove = oldCh[idxInOld];
+            if (sameVnode(vnodeToMove, newStartVnode)) {
+              patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+              oldCh[idxInOld] = undefined;
+              canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+            } else {
+              // same key but different element. treat as new element
+              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+            }
+          }
+          newStartVnode = newCh[++newStartIdx];
+        }
+      }
+      if (oldStartIdx > oldEndIdx) {
+        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+      } else if (newStartIdx > newEndIdx) {
+        removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+      }
+    }
+
+    function checkDuplicateKeys (children) {
+      var seenKeys = {};
+      for (var i = 0; i < children.length; i++) {
+        var vnode = children[i];
+        var key = vnode.key;
+        if (isDef(key)) {
+          if (seenKeys[key]) {
+            warn(
+              ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+              vnode.context
+            );
+          } else {
+            seenKeys[key] = true;
+          }
+        }
+      }
+    }
+
+    function findIdxInOld (node, oldCh, start, end) {
+      for (var i = start; i < end; i++) {
+        var c = oldCh[i];
+        if (isDef(c) && sameVnode(node, c)) { return i }
+      }
+    }
+
+    function patchVnode (
+      oldVnode,
+      vnode,
+      insertedVnodeQueue,
+      ownerArray,
+      index,
+      removeOnly
+    ) {
+      if (oldVnode === vnode) {
+        return
+      }
+
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // clone reused vnode
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
+
+      var elm = vnode.elm = oldVnode.elm;
+
+      if (isTrue(oldVnode.isAsyncPlaceholder)) {
+        if (isDef(vnode.asyncFactory.resolved)) {
+          hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+        } else {
+          vnode.isAsyncPlaceholder = true;
+        }
+        return
+      }
+
+      // reuse element for static trees.
+      // note we only do this if the vnode is cloned -
+      // if the new node is not cloned it means the render functions have been
+      // reset by the hot-reload-api and we need to do a proper re-render.
+      if (isTrue(vnode.isStatic) &&
+        isTrue(oldVnode.isStatic) &&
+        vnode.key === oldVnode.key &&
+        (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+      ) {
+        vnode.componentInstance = oldVnode.componentInstance;
+        return
+      }
+
+      var i;
+      var data = vnode.data;
+      if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+        i(oldVnode, vnode);
+      }
+
+      var oldCh = oldVnode.children;
+      var ch = vnode.children;
+      if (isDef(data) && isPatchable(vnode)) {
+        for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+        if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+      }
+      if (isUndef(vnode.text)) {
+        if (isDef(oldCh) && isDef(ch)) {
+          if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+        } else if (isDef(ch)) {
+          {
+            checkDuplicateKeys(ch);
+          }
+          if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+          addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+        } else if (isDef(oldCh)) {
+          removeVnodes(oldCh, 0, oldCh.length - 1);
+        } else if (isDef(oldVnode.text)) {
+          nodeOps.setTextContent(elm, '');
+        }
+      } else if (oldVnode.text !== vnode.text) {
+        nodeOps.setTextContent(elm, vnode.text);
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+      }
+    }
+
+    function invokeInsertHook (vnode, queue, initial) {
+      // delay insert hooks for component root nodes, invoke them after the
+      // element is really inserted
+      if (isTrue(initial) && isDef(vnode.parent)) {
+        vnode.parent.data.pendingInsert = queue;
+      } else {
+        for (var i = 0; i < queue.length; ++i) {
+          queue[i].data.hook.insert(queue[i]);
+        }
+      }
+    }
+
+    var hydrationBailed = false;
+    // list of modules that can skip create hook during hydration because they
+    // are already rendered on the client or has no need for initialization
+    // Note: style is excluded because it relies on initial clone for future
+    // deep updates (#7063).
+    var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+    // Note: this is a browser-only function so we can assume elms are DOM nodes.
+    function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+      var i;
+      var tag = vnode.tag;
+      var data = vnode.data;
+      var children = vnode.children;
+      inVPre = inVPre || (data && data.pre);
+      vnode.elm = elm;
+
+      if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+        vnode.isAsyncPlaceholder = true;
+        return true
+      }
+      // assert node match
+      {
+        if (!assertNodeMatch(elm, vnode, inVPre)) {
+          return false
+        }
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+        if (isDef(i = vnode.componentInstance)) {
+          // child component. it should have hydrated its own tree.
+          initComponent(vnode, insertedVnodeQueue);
+          return true
+        }
+      }
+      if (isDef(tag)) {
+        if (isDef(children)) {
+          // empty element, allow client to pick up and populate children
+          if (!elm.hasChildNodes()) {
+            createChildren(vnode, children, insertedVnodeQueue);
+          } else {
+            // v-html and domProps: innerHTML
+            if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+              if (i !== elm.innerHTML) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('server innerHTML: ', i);
+                  console.warn('client innerHTML: ', elm.innerHTML);
+                }
+                return false
+              }
+            } else {
+              // iterate and compare children lists
+              var childrenMatch = true;
+              var childNode = elm.firstChild;
+              for (var i$1 = 0; i$1 < children.length; i$1++) {
+                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                  childrenMatch = false;
+                  break
+                }
+                childNode = childNode.nextSibling;
+              }
+              // if childNode is not null, it means the actual childNodes list is
+              // longer than the virtual children list.
+              if (!childrenMatch || childNode) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+                }
+                return false
+              }
+            }
+          }
+        }
+        if (isDef(data)) {
+          var fullInvoke = false;
+          for (var key in data) {
+            if (!isRenderedModule(key)) {
+              fullInvoke = true;
+              invokeCreateHooks(vnode, insertedVnodeQueue);
+              break
+            }
+          }
+          if (!fullInvoke && data['class']) {
+            // ensure collecting deps for deep class bindings for future updates
+            traverse(data['class']);
+          }
+        }
+      } else if (elm.data !== vnode.text) {
+        elm.data = vnode.text;
+      }
+      return true
+    }
+
+    function assertNodeMatch (node, vnode, inVPre) {
+      if (isDef(vnode.tag)) {
+        return vnode.tag.indexOf('vue-component') === 0 || (
+          !isUnknownElement$$1(vnode, inVPre) &&
+          vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+        )
+      } else {
+        return node.nodeType === (vnode.isComment ? 8 : 3)
+      }
+    }
+
+    return function patch (oldVnode, vnode, hydrating, removeOnly) {
+      if (isUndef(vnode)) {
+        if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+        return
+      }
+
+      var isInitialPatch = false;
+      var insertedVnodeQueue = [];
+
+      if (isUndef(oldVnode)) {
+        // empty mount (likely as component), create new root element
+        isInitialPatch = true;
+        createElm(vnode, insertedVnodeQueue);
+      } else {
+        var isRealElement = isDef(oldVnode.nodeType);
+        if (!isRealElement && sameVnode(oldVnode, vnode)) {
+          // patch existing root node
+          patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+        } else {
+          if (isRealElement) {
+            // mounting to a real element
+            // check if this is server-rendered content and if we can perform
+            // a successful hydration.
+            if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+              oldVnode.removeAttribute(SSR_ATTR);
+              hydrating = true;
+            }
+            if (isTrue(hydrating)) {
+              if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+                invokeInsertHook(vnode, insertedVnodeQueue, true);
+                return oldVnode
+              } else {
+                warn(
+                  'The client-side rendered virtual DOM tree is not matching ' +
+                  'server-rendered content. This is likely caused by incorrect ' +
+                  'HTML markup, for example nesting block-level elements inside ' +
+                  '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                  'full client-side render.'
+                );
+              }
+            }
+            // either not server-rendered, or hydration failed.
+            // create an empty node and replace it
+            oldVnode = emptyNodeAt(oldVnode);
+          }
+
+          // replacing existing element
+          var oldElm = oldVnode.elm;
+          var parentElm = nodeOps.parentNode(oldElm);
+
+          // create new node
+          createElm(
+            vnode,
+            insertedVnodeQueue,
+            // extremely rare edge case: do not insert if old element is in a
+            // leaving transition. Only happens when combining transition +
+            // keep-alive + HOCs. (#4590)
+            oldElm._leaveCb ? null : parentElm,
+            nodeOps.nextSibling(oldElm)
+          );
+
+          // update parent placeholder node element, recursively
+          if (isDef(vnode.parent)) {
+            var ancestor = vnode.parent;
+            var patchable = isPatchable(vnode);
+            while (ancestor) {
+              for (var i = 0; i < cbs.destroy.length; ++i) {
+                cbs.destroy[i](ancestor);
+              }
+              ancestor.elm = vnode.elm;
+              if (patchable) {
+                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                  cbs.create[i$1](emptyNode, ancestor);
+                }
+                // #6513
+                // invoke insert hooks that may have been merged by create hooks.
+                // e.g. for directives that uses the "inserted" hook.
+                var insert = ancestor.data.hook.insert;
+                if (insert.merged) {
+                  // start at index 1 to avoid re-invoking component mounted hook
+                  for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                    insert.fns[i$2]();
+                  }
+                }
+              } else {
+                registerRef(ancestor);
+              }
+              ancestor = ancestor.parent;
+            }
+          }
+
+          // destroy old node
+          if (isDef(parentElm)) {
+            removeVnodes([oldVnode], 0, 0);
+          } else if (isDef(oldVnode.tag)) {
+            invokeDestroyHook(oldVnode);
+          }
+        }
+      }
+
+      invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+      return vnode.elm
+    }
+  }
+
+  /*  */
+
+  var directives = {
+    create: updateDirectives,
+    update: updateDirectives,
+    destroy: function unbindDirectives (vnode) {
+      updateDirectives(vnode, emptyNode);
+    }
+  };
+
+  function updateDirectives (oldVnode, vnode) {
+    if (oldVnode.data.directives || vnode.data.directives) {
+      _update(oldVnode, vnode);
+    }
+  }
+
+  function _update (oldVnode, vnode) {
+    var isCreate = oldVnode === emptyNode;
+    var isDestroy = vnode === emptyNode;
+    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+    var dirsWithInsert = [];
+    var dirsWithPostpatch = [];
+
+    var key, oldDir, dir;
+    for (key in newDirs) {
+      oldDir = oldDirs[key];
+      dir = newDirs[key];
+      if (!oldDir) {
+        // new directive, bind
+        callHook$1(dir, 'bind', vnode, oldVnode);
+        if (dir.def && dir.def.inserted) {
+          dirsWithInsert.push(dir);
+        }
+      } else {
+        // existing directive, update
+        dir.oldValue = oldDir.value;
+        dir.oldArg = oldDir.arg;
+        callHook$1(dir, 'update', vnode, oldVnode);
+        if (dir.def && dir.def.componentUpdated) {
+          dirsWithPostpatch.push(dir);
+        }
+      }
+    }
+
+    if (dirsWithInsert.length) {
+      var callInsert = function () {
+        for (var i = 0; i < dirsWithInsert.length; i++) {
+          callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+        }
+      };
+      if (isCreate) {
+        mergeVNodeHook(vnode, 'insert', callInsert);
+      } else {
+        callInsert();
+      }
+    }
+
+    if (dirsWithPostpatch.length) {
+      mergeVNodeHook(vnode, 'postpatch', function () {
+        for (var i = 0; i < dirsWithPostpatch.length; i++) {
+          callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+        }
+      });
+    }
+
+    if (!isCreate) {
+      for (key in oldDirs) {
+        if (!newDirs[key]) {
+          // no longer present, unbind
+          callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+        }
+      }
+    }
+  }
+
+  var emptyModifiers = Object.create(null);
+
+  function normalizeDirectives$1 (
+    dirs,
+    vm
+  ) {
+    var res = Object.create(null);
+    if (!dirs) {
+      // $flow-disable-line
+      return res
+    }
+    var i, dir;
+    for (i = 0; i < dirs.length; i++) {
+      dir = dirs[i];
+      if (!dir.modifiers) {
+        // $flow-disable-line
+        dir.modifiers = emptyModifiers;
+      }
+      res[getRawDirName(dir)] = dir;
+      dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+    }
+    // $flow-disable-line
+    return res
+  }
+
+  function getRawDirName (dir) {
+    return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+  }
+
+  function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+    var fn = dir.def && dir.def[hook];
+    if (fn) {
+      try {
+        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+      } catch (e) {
+        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+      }
+    }
+  }
+
+  var baseModules = [
+    ref,
+    directives
+  ];
+
+  /*  */
+
+  function updateAttrs (oldVnode, vnode) {
+    var opts = vnode.componentOptions;
+    if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+      return
+    }
+    if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+      return
+    }
+    var key, cur, old;
+    var elm = vnode.elm;
+    var oldAttrs = oldVnode.data.attrs || {};
+    var attrs = vnode.data.attrs || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(attrs.__ob__)) {
+      attrs = vnode.data.attrs = extend({}, attrs);
+    }
+
+    for (key in attrs) {
+      cur = attrs[key];
+      old = oldAttrs[key];
+      if (old !== cur) {
+        setAttr(elm, key, cur);
+      }
+    }
+    // #4391: in IE9, setting type can reset value for input[type=radio]
+    // #6666: IE/Edge forces progress value down to 1 before setting a max
+    /* istanbul ignore if */
+    if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+      setAttr(elm, 'value', attrs.value);
+    }
+    for (key in oldAttrs) {
+      if (isUndef(attrs[key])) {
+        if (isXlink(key)) {
+          elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+        } else if (!isEnumeratedAttr(key)) {
+          elm.removeAttribute(key);
+        }
+      }
+    }
+  }
+
+  function setAttr (el, key, value) {
+    if (el.tagName.indexOf('-') > -1) {
+      baseSetAttr(el, key, value);
+    } else if (isBooleanAttr(key)) {
+      // set attribute for blank value
+      // e.g. <option disabled>Select one</option>
+      if (isFalsyAttrValue(value)) {
+        el.removeAttribute(key);
+      } else {
+        // technically allowfullscreen is a boolean attribute for <iframe>,
+        // but Flash expects a value of "true" when used on <embed> tag
+        value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+          ? 'true'
+          : key;
+        el.setAttribute(key, value);
+      }
+    } else if (isEnumeratedAttr(key)) {
+      el.setAttribute(key, convertEnumeratedValue(key, value));
+    } else if (isXlink(key)) {
+      if (isFalsyAttrValue(value)) {
+        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else {
+        el.setAttributeNS(xlinkNS, key, value);
+      }
+    } else {
+      baseSetAttr(el, key, value);
+    }
+  }
+
+  function baseSetAttr (el, key, value) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // #7138: IE10 & 11 fires input event when setting placeholder on
+      // <textarea>... block the first input event and remove the blocker
+      // immediately.
+      /* istanbul ignore if */
+      if (
+        isIE && !isIE9 &&
+        el.tagName === 'TEXTAREA' &&
+        key === 'placeholder' && value !== '' && !el.__ieph
+      ) {
+        var blocker = function (e) {
+          e.stopImmediatePropagation();
+          el.removeEventListener('input', blocker);
+        };
+        el.addEventListener('input', blocker);
+        // $flow-disable-line
+        el.__ieph = true; /* IE placeholder patched */
+      }
+      el.setAttribute(key, value);
+    }
+  }
+
+  var attrs = {
+    create: updateAttrs,
+    update: updateAttrs
+  };
+
+  /*  */
+
+  function updateClass (oldVnode, vnode) {
+    var el = vnode.elm;
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+    if (
+      isUndef(data.staticClass) &&
+      isUndef(data.class) && (
+        isUndef(oldData) || (
+          isUndef(oldData.staticClass) &&
+          isUndef(oldData.class)
+        )
+      )
+    ) {
+      return
+    }
+
+    var cls = genClassForVnode(vnode);
+
+    // handle transition classes
+    var transitionClass = el._transitionClasses;
+    if (isDef(transitionClass)) {
+      cls = concat(cls, stringifyClass(transitionClass));
+    }
+
+    // set the class
+    if (cls !== el._prevClass) {
+      el.setAttribute('class', cls);
+      el._prevClass = cls;
+    }
+  }
+
+  var klass = {
+    create: updateClass,
+    update: updateClass
+  };
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  // in some cases, the event used has to be determined at runtime
+  // so we used some reserved tokens during compile.
+  var RANGE_TOKEN = '__r';
+  var CHECKBOX_RADIO_TOKEN = '__c';
+
+  /*  */
+
+  // normalize v-model event tokens that can only be determined at runtime.
+  // it's important to place the event as the first in the array because
+  // the whole point is ensuring the v-model callback gets called before
+  // user-attached handlers.
+  function normalizeEvents (on) {
+    /* istanbul ignore if */
+    if (isDef(on[RANGE_TOKEN])) {
+      // IE input[type=range] only supports `change` event
+      var event = isIE ? 'change' : 'input';
+      on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+      delete on[RANGE_TOKEN];
+    }
+    // This was originally intended to fix #4521 but no longer necessary
+    // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+    /* istanbul ignore if */
+    if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+      on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+      delete on[CHECKBOX_RADIO_TOKEN];
+    }
+  }
+
+  var target$1;
+
+  function createOnceHandler$1 (event, handler, capture) {
+    var _target = target$1; // save current target element in closure
+    return function onceHandler () {
+      var res = handler.apply(null, arguments);
+      if (res !== null) {
+        remove$2(event, onceHandler, capture, _target);
+      }
+    }
+  }
+
+  // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+  // implementation and does not fire microtasks in between event propagation, so
+  // safe to exclude.
+  var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+  function add$1 (
+    name,
+    handler,
+    capture,
+    passive
+  ) {
+    // async edge case #6566: inner click event triggers patch, event handler
+    // attached to outer element during patch, and triggered again. This
+    // happens because browsers fire microtask ticks between event propagation.
+    // the solution is simple: we save the timestamp when a handler is attached,
+    // and the handler would only fire if the event passed to it was fired
+    // AFTER it was attached.
+    if (useMicrotaskFix) {
+      var attachedTimestamp = currentFlushTimestamp;
+      var original = handler;
+      handler = original._wrapper = function (e) {
+        if (
+          // no bubbling, should always fire.
+          // this is just a safety net in case event.timeStamp is unreliable in
+          // certain weird environments...
+          e.target === e.currentTarget ||
+          // event is fired after handler attachment
+          e.timeStamp >= attachedTimestamp ||
+          // bail for environments that have buggy event.timeStamp implementations
+          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+          // #9681 QtWebEngine event.timeStamp is negative value
+          e.timeStamp <= 0 ||
+          // #9448 bail if event is fired in another document in a multi-page
+          // electron/nw.js app, since event.timeStamp will be using a different
+          // starting reference
+          e.target.ownerDocument !== document
+        ) {
+          return original.apply(this, arguments)
+        }
+      };
+    }
+    target$1.addEventListener(
+      name,
+      handler,
+      supportsPassive
+        ? { capture: capture, passive: passive }
+        : capture
+    );
+  }
+
+  function remove$2 (
+    name,
+    handler,
+    capture,
+    _target
+  ) {
+    (_target || target$1).removeEventListener(
+      name,
+      handler._wrapper || handler,
+      capture
+    );
+  }
+
+  function updateDOMListeners (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+      return
+    }
+    var on = vnode.data.on || {};
+    var oldOn = oldVnode.data.on || {};
+    target$1 = vnode.elm;
+    normalizeEvents(on);
+    updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+    target$1 = undefined;
+  }
+
+  var events = {
+    create: updateDOMListeners,
+    update: updateDOMListeners
+  };
+
+  /*  */
+
+  var svgContainer;
+
+  function updateDOMProps (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+      return
+    }
+    var key, cur;
+    var elm = vnode.elm;
+    var oldProps = oldVnode.data.domProps || {};
+    var props = vnode.data.domProps || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(props.__ob__)) {
+      props = vnode.data.domProps = extend({}, props);
+    }
+
+    for (key in oldProps) {
+      if (!(key in props)) {
+        elm[key] = '';
+      }
+    }
+
+    for (key in props) {
+      cur = props[key];
+      // ignore children if the node has textContent or innerHTML,
+      // as these will throw away existing DOM nodes and cause removal errors
+      // on subsequent patches (#3360)
+      if (key === 'textContent' || key === 'innerHTML') {
+        if (vnode.children) { vnode.children.length = 0; }
+        if (cur === oldProps[key]) { continue }
+        // #6601 work around Chrome version <= 55 bug where single textNode
+        // replaced by innerHTML/textContent retains its parentNode property
+        if (elm.childNodes.length === 1) {
+          elm.removeChild(elm.childNodes[0]);
+        }
+      }
+
+      if (key === 'value' && elm.tagName !== 'PROGRESS') {
+        // store value as _value as well since
+        // non-string values will be stringified
+        elm._value = cur;
+        // avoid resetting cursor position when value is the same
+        var strCur = isUndef(cur) ? '' : String(cur);
+        if (shouldUpdateValue(elm, strCur)) {
+          elm.value = strCur;
+        }
+      } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+        // IE doesn't support innerHTML for SVG elements
+        svgContainer = svgContainer || document.createElement('div');
+        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+        var svg = svgContainer.firstChild;
+        while (elm.firstChild) {
+          elm.removeChild(elm.firstChild);
+        }
+        while (svg.firstChild) {
+          elm.appendChild(svg.firstChild);
+        }
+      } else if (
+        // skip the update if old and new VDOM state is the same.
+        // `value` is handled separately because the DOM value may be temporarily
+        // out of sync with VDOM state due to focus, composition and modifiers.
+        // This  #4521 by skipping the unnecessary `checked` update.
+        cur !== oldProps[key]
+      ) {
+        // some property updates can throw
+        // e.g. `value` on <progress> w/ non-finite value
+        try {
+          elm[key] = cur;
+        } catch (e) {}
+      }
+    }
+  }
+
+  // check platforms/web/util/attrs.js acceptValue
+
+
+  function shouldUpdateValue (elm, checkVal) {
+    return (!elm.composing && (
+      elm.tagName === 'OPTION' ||
+      isNotInFocusAndDirty(elm, checkVal) ||
+      isDirtyWithModifiers(elm, checkVal)
+    ))
+  }
+
+  function isNotInFocusAndDirty (elm, checkVal) {
+    // return true when textbox (.number and .trim) loses focus and its value is
+    // not equal to the updated value
+    var notInFocus = true;
+    // #6157
+    // work around IE bug when accessing document.activeElement in an iframe
+    try { notInFocus = document.activeElement !== elm; } catch (e) {}
+    return notInFocus && elm.value !== checkVal
+  }
+
+  function isDirtyWithModifiers (elm, newVal) {
+    var value = elm.value;
+    var modifiers = elm._vModifiers; // injected by v-model runtime
+    if (isDef(modifiers)) {
+      if (modifiers.number) {
+        return toNumber(value) !== toNumber(newVal)
+      }
+      if (modifiers.trim) {
+        return value.trim() !== newVal.trim()
+      }
+    }
+    return value !== newVal
+  }
+
+  var domProps = {
+    create: updateDOMProps,
+    update: updateDOMProps
+  };
+
+  /*  */
+
+  var parseStyleText = cached(function (cssText) {
+    var res = {};
+    var listDelimiter = /;(?![^(]*\))/g;
+    var propertyDelimiter = /:(.+)/;
+    cssText.split(listDelimiter).forEach(function (item) {
+      if (item) {
+        var tmp = item.split(propertyDelimiter);
+        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+      }
+    });
+    return res
+  });
+
+  // merge static and dynamic style data on the same vnode
+  function normalizeStyleData (data) {
+    var style = normalizeStyleBinding(data.style);
+    // static style is pre-processed into an object during compilation
+    // and is always a fresh object, so it's safe to merge into it
+    return data.staticStyle
+      ? extend(data.staticStyle, style)
+      : style
+  }
+
+  // normalize possible array / string values into Object
+  function normalizeStyleBinding (bindingStyle) {
+    if (Array.isArray(bindingStyle)) {
+      return toObject(bindingStyle)
+    }
+    if (typeof bindingStyle === 'string') {
+      return parseStyleText(bindingStyle)
+    }
+    return bindingStyle
+  }
+
+  /**
+   * parent component style should be after child's
+   * so that parent component's style could override it
+   */
+  function getStyle (vnode, checkChild) {
+    var res = {};
+    var styleData;
+
+    if (checkChild) {
+      var childNode = vnode;
+      while (childNode.componentInstance) {
+        childNode = childNode.componentInstance._vnode;
+        if (
+          childNode && childNode.data &&
+          (styleData = normalizeStyleData(childNode.data))
+        ) {
+          extend(res, styleData);
+        }
+      }
+    }
+
+    if ((styleData = normalizeStyleData(vnode.data))) {
+      extend(res, styleData);
+    }
+
+    var parentNode = vnode;
+    while ((parentNode = parentNode.parent)) {
+      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+        extend(res, styleData);
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  var cssVarRE = /^--/;
+  var importantRE = /\s*!important$/;
+  var setProp = function (el, name, val) {
+    /* istanbul ignore if */
+    if (cssVarRE.test(name)) {
+      el.style.setProperty(name, val);
+    } else if (importantRE.test(val)) {
+      el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+    } else {
+      var normalizedName = normalize(name);
+      if (Array.isArray(val)) {
+        // Support values array created by autoprefixer, e.g.
+        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+        // Set them one by one, and the browser will only set those it can recognize
+        for (var i = 0, len = val.length; i < len; i++) {
+          el.style[normalizedName] = val[i];
+        }
+      } else {
+        el.style[normalizedName] = val;
+      }
+    }
+  };
+
+  var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+  var emptyStyle;
+  var normalize = cached(function (prop) {
+    emptyStyle = emptyStyle || document.createElement('div').style;
+    prop = camelize(prop);
+    if (prop !== 'filter' && (prop in emptyStyle)) {
+      return prop
+    }
+    var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+    for (var i = 0; i < vendorNames.length; i++) {
+      var name = vendorNames[i] + capName;
+      if (name in emptyStyle) {
+        return name
+      }
+    }
+  });
+
+  function updateStyle (oldVnode, vnode) {
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+
+    if (isUndef(data.staticStyle) && isUndef(data.style) &&
+      isUndef(oldData.staticStyle) && isUndef(oldData.style)
+    ) {
+      return
+    }
+
+    var cur, name;
+    var el = vnode.elm;
+    var oldStaticStyle = oldData.staticStyle;
+    var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+    // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+    var oldStyle = oldStaticStyle || oldStyleBinding;
+
+    var style = normalizeStyleBinding(vnode.data.style) || {};
+
+    // store normalized style under a different key for next diff
+    // make sure to clone it if it's reactive, since the user likely wants
+    // to mutate it.
+    vnode.data.normalizedStyle = isDef(style.__ob__)
+      ? extend({}, style)
+      : style;
+
+    var newStyle = getStyle(vnode, true);
+
+    for (name in oldStyle) {
+      if (isUndef(newStyle[name])) {
+        setProp(el, name, '');
+      }
+    }
+    for (name in newStyle) {
+      cur = newStyle[name];
+      if (cur !== oldStyle[name]) {
+        // ie9 setting to null has no effect, must use empty string
+        setProp(el, name, cur == null ? '' : cur);
+      }
+    }
+  }
+
+  var style = {
+    create: updateStyle,
+    update: updateStyle
+  };
+
+  /*  */
+
+  var whitespaceRE = /\s+/;
+
+  /**
+   * Add class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function addClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
+    }
+
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+      } else {
+        el.classList.add(cls);
+      }
+    } else {
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      if (cur.indexOf(' ' + cls + ' ') < 0) {
+        el.setAttribute('class', (cur + cls).trim());
+      }
+    }
+  }
+
+  /**
+   * Remove class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function removeClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
+    }
+
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+      } else {
+        el.classList.remove(cls);
+      }
+      if (!el.classList.length) {
+        el.removeAttribute('class');
+      }
+    } else {
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      var tar = ' ' + cls + ' ';
+      while (cur.indexOf(tar) >= 0) {
+        cur = cur.replace(tar, ' ');
+      }
+      cur = cur.trim();
+      if (cur) {
+        el.setAttribute('class', cur);
+      } else {
+        el.removeAttribute('class');
+      }
+    }
+  }
+
+  /*  */
+
+  function resolveTransition (def$$1) {
+    if (!def$$1) {
+      return
+    }
+    /* istanbul ignore else */
+    if (typeof def$$1 === 'object') {
+      var res = {};
+      if (def$$1.css !== false) {
+        extend(res, autoCssTransition(def$$1.name || 'v'));
+      }
+      extend(res, def$$1);
+      return res
+    } else if (typeof def$$1 === 'string') {
+      return autoCssTransition(def$$1)
+    }
+  }
+
+  var autoCssTransition = cached(function (name) {
+    return {
+      enterClass: (name + "-enter"),
+      enterToClass: (name + "-enter-to"),
+      enterActiveClass: (name + "-enter-active"),
+      leaveClass: (name + "-leave"),
+      leaveToClass: (name + "-leave-to"),
+      leaveActiveClass: (name + "-leave-active")
+    }
+  });
+
+  var hasTransition = inBrowser && !isIE9;
+  var TRANSITION = 'transition';
+  var ANIMATION = 'animation';
+
+  // Transition property/event sniffing
+  var transitionProp = 'transition';
+  var transitionEndEvent = 'transitionend';
+  var animationProp = 'animation';
+  var animationEndEvent = 'animationend';
+  if (hasTransition) {
+    /* istanbul ignore if */
+    if (window.ontransitionend === undefined &&
+      window.onwebkittransitionend !== undefined
+    ) {
+      transitionProp = 'WebkitTransition';
+      transitionEndEvent = 'webkitTransitionEnd';
+    }
+    if (window.onanimationend === undefined &&
+      window.onwebkitanimationend !== undefined
+    ) {
+      animationProp = 'WebkitAnimation';
+      animationEndEvent = 'webkitAnimationEnd';
+    }
+  }
+
+  // binding to window is necessary to make hot reload work in IE in strict mode
+  var raf = inBrowser
+    ? window.requestAnimationFrame
+      ? window.requestAnimationFrame.bind(window)
+      : setTimeout
+    : /* istanbul ignore next */ function (fn) { return fn(); };
+
+  function nextFrame (fn) {
+    raf(function () {
+      raf(fn);
+    });
+  }
+
+  function addTransitionClass (el, cls) {
+    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+    if (transitionClasses.indexOf(cls) < 0) {
+      transitionClasses.push(cls);
+      addClass(el, cls);
+    }
+  }
+
+  function removeTransitionClass (el, cls) {
+    if (el._transitionClasses) {
+      remove(el._transitionClasses, cls);
+    }
+    removeClass(el, cls);
+  }
+
+  function whenTransitionEnds (
+    el,
+    expectedType,
+    cb
+  ) {
+    var ref = getTransitionInfo(el, expectedType);
+    var type = ref.type;
+    var timeout = ref.timeout;
+    var propCount = ref.propCount;
+    if (!type) { return cb() }
+    var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+    var ended = 0;
+    var end = function () {
+      el.removeEventListener(event, onEnd);
+      cb();
+    };
+    var onEnd = function (e) {
+      if (e.target === el) {
+        if (++ended >= propCount) {
+          end();
+        }
+      }
+    };
+    setTimeout(function () {
+      if (ended < propCount) {
+        end();
+      }
+    }, timeout + 1);
+    el.addEventListener(event, onEnd);
+  }
+
+  var transformRE = /\b(transform|all)(,|$)/;
+
+  function getTransitionInfo (el, expectedType) {
+    var styles = window.getComputedStyle(el);
+    // JSDOM may return undefined for transition properties
+    var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+    var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+    var type;
+    var timeout = 0;
+    var propCount = 0;
+    /* istanbul ignore if */
+    if (expectedType === TRANSITION) {
+      if (transitionTimeout > 0) {
+        type = TRANSITION;
+        timeout = transitionTimeout;
+        propCount = transitionDurations.length;
+      }
+    } else if (expectedType === ANIMATION) {
+      if (animationTimeout > 0) {
+        type = ANIMATION;
+        timeout = animationTimeout;
+        propCount = animationDurations.length;
+      }
+    } else {
+      timeout = Math.max(transitionTimeout, animationTimeout);
+      type = timeout > 0
+        ? transitionTimeout > animationTimeout
+          ? TRANSITION
+          : ANIMATION
+        : null;
+      propCount = type
+        ? type === TRANSITION
+          ? transitionDurations.length
+          : animationDurations.length
+        : 0;
+    }
+    var hasTransform =
+      type === TRANSITION &&
+      transformRE.test(styles[transitionProp + 'Property']);
+    return {
+      type: type,
+      timeout: timeout,
+      propCount: propCount,
+      hasTransform: hasTransform
+    }
+  }
+
+  function getTimeout (delays, durations) {
+    /* istanbul ignore next */
+    while (delays.length < durations.length) {
+      delays = delays.concat(delays);
+    }
+
+    return Math.max.apply(null, durations.map(function (d, i) {
+      return toMs(d) + toMs(delays[i])
+    }))
+  }
+
+  // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+  // in a locale-dependent way, using a comma instead of a dot.
+  // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+  // as a floor function) causing unexpected behaviors
+  function toMs (s) {
+    return Number(s.slice(0, -1).replace(',', '.')) * 1000
+  }
+
+  /*  */
+
+  function enter (vnode, toggleDisplay) {
+    var el = vnode.elm;
+
+    // call leave callback now
+    if (isDef(el._leaveCb)) {
+      el._leaveCb.cancelled = true;
+      el._leaveCb();
+    }
+
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data)) {
+      return
+    }
+
+    /* istanbul ignore if */
+    if (isDef(el._enterCb) || el.nodeType !== 1) {
+      return
+    }
+
+    var css = data.css;
+    var type = data.type;
+    var enterClass = data.enterClass;
+    var enterToClass = data.enterToClass;
+    var enterActiveClass = data.enterActiveClass;
+    var appearClass = data.appearClass;
+    var appearToClass = data.appearToClass;
+    var appearActiveClass = data.appearActiveClass;
+    var beforeEnter = data.beforeEnter;
+    var enter = data.enter;
+    var afterEnter = data.afterEnter;
+    var enterCancelled = data.enterCancelled;
+    var beforeAppear = data.beforeAppear;
+    var appear = data.appear;
+    var afterAppear = data.afterAppear;
+    var appearCancelled = data.appearCancelled;
+    var duration = data.duration;
+
+    // activeInstance will always be the <transition> component managing this
+    // transition. One edge case to check is when the <transition> is placed
+    // as the root node of a child component. In that case we need to check
+    // <transition>'s parent for appear check.
+    var context = activeInstance;
+    var transitionNode = activeInstance.$vnode;
+    while (transitionNode && transitionNode.parent) {
+      context = transitionNode.context;
+      transitionNode = transitionNode.parent;
+    }
+
+    var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+    if (isAppear && !appear && appear !== '') {
+      return
+    }
+
+    var startClass = isAppear && appearClass
+      ? appearClass
+      : enterClass;
+    var activeClass = isAppear && appearActiveClass
+      ? appearActiveClass
+      : enterActiveClass;
+    var toClass = isAppear && appearToClass
+      ? appearToClass
+      : enterToClass;
+
+    var beforeEnterHook = isAppear
+      ? (beforeAppear || beforeEnter)
+      : beforeEnter;
+    var enterHook = isAppear
+      ? (typeof appear === 'function' ? appear : enter)
+      : enter;
+    var afterEnterHook = isAppear
+      ? (afterAppear || afterEnter)
+      : afterEnter;
+    var enterCancelledHook = isAppear
+      ? (appearCancelled || enterCancelled)
+      : enterCancelled;
+
+    var explicitEnterDuration = toNumber(
+      isObject(duration)
+        ? duration.enter
+        : duration
+    );
+
+    if (explicitEnterDuration != null) {
+      checkDuration(explicitEnterDuration, 'enter', vnode);
+    }
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(enterHook);
+
+    var cb = el._enterCb = once(function () {
+      if (expectsCSS) {
+        removeTransitionClass(el, toClass);
+        removeTransitionClass(el, activeClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, startClass);
+        }
+        enterCancelledHook && enterCancelledHook(el);
+      } else {
+        afterEnterHook && afterEnterHook(el);
+      }
+      el._enterCb = null;
+    });
+
+    if (!vnode.data.show) {
+      // remove pending leave element on enter by injecting an insert hook
+      mergeVNodeHook(vnode, 'insert', function () {
+        var parent = el.parentNode;
+        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+        if (pendingNode &&
+          pendingNode.tag === vnode.tag &&
+          pendingNode.elm._leaveCb
+        ) {
+          pendingNode.elm._leaveCb();
+        }
+        enterHook && enterHook(el, cb);
+      });
+    }
+
+    // start enter transition
+    beforeEnterHook && beforeEnterHook(el);
+    if (expectsCSS) {
+      addTransitionClass(el, startClass);
+      addTransitionClass(el, activeClass);
+      nextFrame(function () {
+        removeTransitionClass(el, startClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, toClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitEnterDuration)) {
+              setTimeout(cb, explicitEnterDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+
+    if (vnode.data.show) {
+      toggleDisplay && toggleDisplay();
+      enterHook && enterHook(el, cb);
+    }
+
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+
+  function leave (vnode, rm) {
+    var el = vnode.elm;
+
+    // call enter callback now
+    if (isDef(el._enterCb)) {
+      el._enterCb.cancelled = true;
+      el._enterCb();
+    }
+
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data) || el.nodeType !== 1) {
+      return rm()
+    }
+
+    /* istanbul ignore if */
+    if (isDef(el._leaveCb)) {
+      return
+    }
+
+    var css = data.css;
+    var type = data.type;
+    var leaveClass = data.leaveClass;
+    var leaveToClass = data.leaveToClass;
+    var leaveActiveClass = data.leaveActiveClass;
+    var beforeLeave = data.beforeLeave;
+    var leave = data.leave;
+    var afterLeave = data.afterLeave;
+    var leaveCancelled = data.leaveCancelled;
+    var delayLeave = data.delayLeave;
+    var duration = data.duration;
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(leave);
+
+    var explicitLeaveDuration = toNumber(
+      isObject(duration)
+        ? duration.leave
+        : duration
+    );
+
+    if (isDef(explicitLeaveDuration)) {
+      checkDuration(explicitLeaveDuration, 'leave', vnode);
+    }
+
+    var cb = el._leaveCb = once(function () {
+      if (el.parentNode && el.parentNode._pending) {
+        el.parentNode._pending[vnode.key] = null;
+      }
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveToClass);
+        removeTransitionClass(el, leaveActiveClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, leaveClass);
+        }
+        leaveCancelled && leaveCancelled(el);
+      } else {
+        rm();
+        afterLeave && afterLeave(el);
+      }
+      el._leaveCb = null;
+    });
+
+    if (delayLeave) {
+      delayLeave(performLeave);
+    } else {
+      performLeave();
+    }
+
+    function performLeave () {
+      // the delayed leave may have already been cancelled
+      if (cb.cancelled) {
+        return
+      }
+      // record leaving element
+      if (!vnode.data.show && el.parentNode) {
+        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+      }
+      beforeLeave && beforeLeave(el);
+      if (expectsCSS) {
+        addTransitionClass(el, leaveClass);
+        addTransitionClass(el, leaveActiveClass);
+        nextFrame(function () {
+          removeTransitionClass(el, leaveClass);
+          if (!cb.cancelled) {
+            addTransitionClass(el, leaveToClass);
+            if (!userWantsControl) {
+              if (isValidDuration(explicitLeaveDuration)) {
+                setTimeout(cb, explicitLeaveDuration);
+              } else {
+                whenTransitionEnds(el, type, cb);
+              }
+            }
+          }
+        });
+      }
+      leave && leave(el, cb);
+      if (!expectsCSS && !userWantsControl) {
+        cb();
+      }
+    }
+  }
+
+  // only used in dev mode
+  function checkDuration (val, name, vnode) {
+    if (typeof val !== 'number') {
+      warn(
+        "<transition> explicit " + name + " duration is not a valid number - " +
+        "got " + (JSON.stringify(val)) + ".",
+        vnode.context
+      );
+    } else if (isNaN(val)) {
+      warn(
+        "<transition> explicit " + name + " duration is NaN - " +
+        'the duration expression might be incorrect.',
+        vnode.context
+      );
+    }
+  }
+
+  function isValidDuration (val) {
+    return typeof val === 'number' && !isNaN(val)
+  }
+
+  /**
+   * Normalize a transition hook's argument length. The hook may be:
+   * - a merged hook (invoker) with the original in .fns
+   * - a wrapped component method (check ._length)
+   * - a plain function (.length)
+   */
+  function getHookArgumentsLength (fn) {
+    if (isUndef(fn)) {
+      return false
+    }
+    var invokerFns = fn.fns;
+    if (isDef(invokerFns)) {
+      // invoker
+      return getHookArgumentsLength(
+        Array.isArray(invokerFns)
+          ? invokerFns[0]
+          : invokerFns
+      )
+    } else {
+      return (fn._length || fn.length) > 1
+    }
+  }
+
+  function _enter (_, vnode) {
+    if (vnode.data.show !== true) {
+      enter(vnode);
+    }
+  }
+
+  var transition = inBrowser ? {
+    create: _enter,
+    activate: _enter,
+    remove: function remove$$1 (vnode, rm) {
+      /* istanbul ignore else */
+      if (vnode.data.show !== true) {
+        leave(vnode, rm);
+      } else {
+        rm();
+      }
+    }
+  } : {};
+
+  var platformModules = [
+    attrs,
+    klass,
+    events,
+    domProps,
+    style,
+    transition
+  ];
+
+  /*  */
+
+  // the directive module should be applied last, after all
+  // built-in modules have been applied.
+  var modules = platformModules.concat(baseModules);
+
+  var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+  /**
+   * Not type checking this file because flow doesn't like attaching
+   * properties to Elements.
+   */
+
+  /* istanbul ignore if */
+  if (isIE9) {
+    // http://www.matts411.com/post/internet-explorer-9-oninput/
+    document.addEventListener('selectionchange', function () {
+      var el = document.activeElement;
+      if (el && el.vmodel) {
+        trigger(el, 'input');
+      }
+    });
+  }
+
+  var directive = {
+    inserted: function inserted (el, binding, vnode, oldVnode) {
+      if (vnode.tag === 'select') {
+        // #6903
+        if (oldVnode.elm && !oldVnode.elm._vOptions) {
+          mergeVNodeHook(vnode, 'postpatch', function () {
+            directive.componentUpdated(el, binding, vnode);
+          });
+        } else {
+          setSelected(el, binding, vnode.context);
+        }
+        el._vOptions = [].map.call(el.options, getValue);
+      } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+        el._vModifiers = binding.modifiers;
+        if (!binding.modifiers.lazy) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+          // Safari < 10.2 & UIWebView doesn't fire compositionend when
+          // switching focus before confirming composition choice
+          // this also fixes the issue where some browsers e.g. iOS Chrome
+          // fires "change" instead of "input" on autocomplete.
+          el.addEventListener('change', onCompositionEnd);
+          /* istanbul ignore if */
+          if (isIE9) {
+            el.vmodel = true;
+          }
+        }
+      }
+    },
+
+    componentUpdated: function componentUpdated (el, binding, vnode) {
+      if (vnode.tag === 'select') {
+        setSelected(el, binding, vnode.context);
+        // in case the options rendered by v-for have changed,
+        // it's possible that the value is out-of-sync with the rendered options.
+        // detect such cases and filter out values that no longer has a matching
+        // option in the DOM.
+        var prevOptions = el._vOptions;
+        var curOptions = el._vOptions = [].map.call(el.options, getValue);
+        if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+          // trigger change event if
+          // no matching option found for at least one value
+          var needReset = el.multiple
+            ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+            : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+          if (needReset) {
+            trigger(el, 'change');
+          }
+        }
+      }
+    }
+  };
+
+  function setSelected (el, binding, vm) {
+    actuallySetSelected(el, binding, vm);
+    /* istanbul ignore if */
+    if (isIE || isEdge) {
+      setTimeout(function () {
+        actuallySetSelected(el, binding, vm);
+      }, 0);
+    }
+  }
+
+  function actuallySetSelected (el, binding, vm) {
+    var value = binding.value;
+    var isMultiple = el.multiple;
+    if (isMultiple && !Array.isArray(value)) {
+      warn(
+        "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+        vm
+      );
+      return
+    }
+    var selected, option;
+    for (var i = 0, l = el.options.length; i < l; i++) {
+      option = el.options[i];
+      if (isMultiple) {
+        selected = looseIndexOf(value, getValue(option)) > -1;
+        if (option.selected !== selected) {
+          option.selected = selected;
+        }
+      } else {
+        if (looseEqual(getValue(option), value)) {
+          if (el.selectedIndex !== i) {
+            el.selectedIndex = i;
+          }
+          return
+        }
+      }
+    }
+    if (!isMultiple) {
+      el.selectedIndex = -1;
+    }
+  }
+
+  function hasNoMatchingOption (value, options) {
+    return options.every(function (o) { return !looseEqual(o, value); })
+  }
+
+  function getValue (option) {
+    return '_value' in option
+      ? option._value
+      : option.value
+  }
+
+  function onCompositionStart (e) {
+    e.target.composing = true;
+  }
+
+  function onCompositionEnd (e) {
+    // prevent triggering an input event for no reason
+    if (!e.target.composing) { return }
+    e.target.composing = false;
+    trigger(e.target, 'input');
+  }
+
+  function trigger (el, type) {
+    var e = document.createEvent('HTMLEvents');
+    e.initEvent(type, true, true);
+    el.dispatchEvent(e);
+  }
+
+  /*  */
+
+  // recursively search for possible transition defined inside the component root
+  function locateNode (vnode) {
+    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+      ? locateNode(vnode.componentInstance._vnode)
+      : vnode
+  }
+
+  var show = {
+    bind: function bind (el, ref, vnode) {
+      var value = ref.value;
+
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      var originalDisplay = el.__vOriginalDisplay =
+        el.style.display === 'none' ? '' : el.style.display;
+      if (value && transition$$1) {
+        vnode.data.show = true;
+        enter(vnode, function () {
+          el.style.display = originalDisplay;
+        });
+      } else {
+        el.style.display = value ? originalDisplay : 'none';
+      }
+    },
+
+    update: function update (el, ref, vnode) {
+      var value = ref.value;
+      var oldValue = ref.oldValue;
+
+      /* istanbul ignore if */
+      if (!value === !oldValue) { return }
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      if (transition$$1) {
+        vnode.data.show = true;
+        if (value) {
+          enter(vnode, function () {
+            el.style.display = el.__vOriginalDisplay;
+          });
+        } else {
+          leave(vnode, function () {
+            el.style.display = 'none';
+          });
+        }
+      } else {
+        el.style.display = value ? el.__vOriginalDisplay : 'none';
+      }
+    },
+
+    unbind: function unbind (
+      el,
+      binding,
+      vnode,
+      oldVnode,
+      isDestroy
+    ) {
+      if (!isDestroy) {
+        el.style.display = el.__vOriginalDisplay;
+      }
+    }
+  };
+
+  var platformDirectives = {
+    model: directive,
+    show: show
+  };
+
+  /*  */
+
+  var transitionProps = {
+    name: String,
+    appear: Boolean,
+    css: Boolean,
+    mode: String,
+    type: String,
+    enterClass: String,
+    leaveClass: String,
+    enterToClass: String,
+    leaveToClass: String,
+    enterActiveClass: String,
+    leaveActiveClass: String,
+    appearClass: String,
+    appearActiveClass: String,
+    appearToClass: String,
+    duration: [Number, String, Object]
+  };
+
+  // in case the child is also an abstract component, e.g. <keep-alive>
+  // we want to recursively retrieve the real component to be rendered
+  function getRealChild (vnode) {
+    var compOptions = vnode && vnode.componentOptions;
+    if (compOptions && compOptions.Ctor.options.abstract) {
+      return getRealChild(getFirstComponentChild(compOptions.children))
+    } else {
+      return vnode
+    }
+  }
+
+  function extractTransitionData (comp) {
+    var data = {};
+    var options = comp.$options;
+    // props
+    for (var key in options.propsData) {
+      data[key] = comp[key];
+    }
+    // events.
+    // extract listeners and pass them directly to the transition methods
+    var listeners = options._parentListeners;
+    for (var key$1 in listeners) {
+      data[camelize(key$1)] = listeners[key$1];
+    }
+    return data
+  }
+
+  function placeholder (h, rawChild) {
+    if (/\d-keep-alive$/.test(rawChild.tag)) {
+      return h('keep-alive', {
+        props: rawChild.componentOptions.propsData
+      })
+    }
+  }
+
+  function hasParentTransition (vnode) {
+    while ((vnode = vnode.parent)) {
+      if (vnode.data.transition) {
+        return true
+      }
+    }
+  }
+
+  function isSameChild (child, oldChild) {
+    return oldChild.key === child.key && oldChild.tag === child.tag
+  }
+
+  var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+  var isVShowDirective = function (d) { return d.name === 'show'; };
+
+  var Transition = {
+    name: 'transition',
+    props: transitionProps,
+    abstract: true,
+
+    render: function render (h) {
+      var this$1 = this;
+
+      var children = this.$slots.default;
+      if (!children) {
+        return
+      }
+
+      // filter out text nodes (possible whitespaces)
+      children = children.filter(isNotTextNode);
+      /* istanbul ignore if */
+      if (!children.length) {
+        return
+      }
+
+      // warn multiple elements
+      if (children.length > 1) {
+        warn(
+          '<transition> can only be used on a single element. Use ' +
+          '<transition-group> for lists.',
+          this.$parent
+        );
+      }
+
+      var mode = this.mode;
+
+      // warn invalid mode
+      if (mode && mode !== 'in-out' && mode !== 'out-in'
+      ) {
+        warn(
+          'invalid <transition> mode: ' + mode,
+          this.$parent
+        );
+      }
+
+      var rawChild = children[0];
+
+      // if this is a component root node and the component's
+      // parent container node also has transition, skip.
+      if (hasParentTransition(this.$vnode)) {
+        return rawChild
+      }
+
+      // apply transition data to child
+      // use getRealChild() to ignore abstract components e.g. keep-alive
+      var child = getRealChild(rawChild);
+      /* istanbul ignore if */
+      if (!child) {
+        return rawChild
+      }
+
+      if (this._leaving) {
+        return placeholder(h, rawChild)
+      }
+
+      // ensure a key that is unique to the vnode type and to this transition
+      // component instance. This key will be used to remove pending leaving nodes
+      // during entering.
+      var id = "__transition-" + (this._uid) + "-";
+      child.key = child.key == null
+        ? child.isComment
+          ? id + 'comment'
+          : id + child.tag
+        : isPrimitive(child.key)
+          ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+          : child.key;
+
+      var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+      var oldRawChild = this._vnode;
+      var oldChild = getRealChild(oldRawChild);
+
+      // mark v-show
+      // so that the transition module can hand over the control to the directive
+      if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+        child.data.show = true;
+      }
+
+      if (
+        oldChild &&
+        oldChild.data &&
+        !isSameChild(child, oldChild) &&
+        !isAsyncPlaceholder(oldChild) &&
+        // #6687 component root is a comment node
+        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+      ) {
+        // replace old child transition data with fresh one
+        // important for dynamic transitions!
+        var oldData = oldChild.data.transition = extend({}, data);
+        // handle transition mode
+        if (mode === 'out-in') {
+          // return placeholder node and queue update when leave finishes
+          this._leaving = true;
+          mergeVNodeHook(oldData, 'afterLeave', function () {
+            this$1._leaving = false;
+            this$1.$forceUpdate();
+          });
+          return placeholder(h, rawChild)
+        } else if (mode === 'in-out') {
+          if (isAsyncPlaceholder(child)) {
+            return oldRawChild
+          }
+          var delayedLeave;
+          var performLeave = function () { delayedLeave(); };
+          mergeVNodeHook(data, 'afterEnter', performLeave);
+          mergeVNodeHook(data, 'enterCancelled', performLeave);
+          mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+        }
+      }
+
+      return rawChild
+    }
+  };
+
+  /*  */
+
+  var props = extend({
+    tag: String,
+    moveClass: String
+  }, transitionProps);
+
+  delete props.mode;
+
+  var TransitionGroup = {
+    props: props,
+
+    beforeMount: function beforeMount () {
+      var this$1 = this;
+
+      var update = this._update;
+      this._update = function (vnode, hydrating) {
+        var restoreActiveInstance = setActiveInstance(this$1);
+        // force removing pass
+        this$1.__patch__(
+          this$1._vnode,
+          this$1.kept,
+          false, // hydrating
+          true // removeOnly (!important, avoids unnecessary moves)
+        );
+        this$1._vnode = this$1.kept;
+        restoreActiveInstance();
+        update.call(this$1, vnode, hydrating);
+      };
+    },
+
+    render: function render (h) {
+      var tag = this.tag || this.$vnode.data.tag || 'span';
+      var map = Object.create(null);
+      var prevChildren = this.prevChildren = this.children;
+      var rawChildren = this.$slots.default || [];
+      var children = this.children = [];
+      var transitionData = extractTransitionData(this);
+
+      for (var i = 0; i < rawChildren.length; i++) {
+        var c = rawChildren[i];
+        if (c.tag) {
+          if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+            children.push(c);
+            map[c.key] = c
+            ;(c.data || (c.data = {})).transition = transitionData;
+          } else {
+            var opts = c.componentOptions;
+            var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+            warn(("<transition-group> children must be keyed: <" + name + ">"));
+          }
+        }
+      }
+
+      if (prevChildren) {
+        var kept = [];
+        var removed = [];
+        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+          var c$1 = prevChildren[i$1];
+          c$1.data.transition = transitionData;
+          c$1.data.pos = c$1.elm.getBoundingClientRect();
+          if (map[c$1.key]) {
+            kept.push(c$1);
+          } else {
+            removed.push(c$1);
+          }
+        }
+        this.kept = h(tag, null, kept);
+        this.removed = removed;
+      }
+
+      return h(tag, null, children)
+    },
+
+    updated: function updated () {
+      var children = this.prevChildren;
+      var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+      if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+        return
+      }
+
+      // we divide the work into three loops to avoid mixing DOM reads and writes
+      // in each iteration - which helps prevent layout thrashing.
+      children.forEach(callPendingCbs);
+      children.forEach(recordPosition);
+      children.forEach(applyTranslation);
+
+      // force reflow to put everything in position
+      // assign to this to avoid being removed in tree-shaking
+      // $flow-disable-line
+      this._reflow = document.body.offsetHeight;
+
+      children.forEach(function (c) {
+        if (c.data.moved) {
+          var el = c.elm;
+          var s = el.style;
+          addTransitionClass(el, moveClass);
+          s.transform = s.WebkitTransform = s.transitionDuration = '';
+          el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+            if (e && e.target !== el) {
+              return
+            }
+            if (!e || /transform$/.test(e.propertyName)) {
+              el.removeEventListener(transitionEndEvent, cb);
+              el._moveCb = null;
+              removeTransitionClass(el, moveClass);
+            }
+          });
+        }
+      });
+    },
+
+    methods: {
+      hasMove: function hasMove (el, moveClass) {
+        /* istanbul ignore if */
+        if (!hasTransition) {
+          return false
+        }
+        /* istanbul ignore if */
+        if (this._hasMove) {
+          return this._hasMove
+        }
+        // Detect whether an element with the move class applied has
+        // CSS transitions. Since the element may be inside an entering
+        // transition at this very moment, we make a clone of it and remove
+        // all other transition classes applied to ensure only the move class
+        // is applied.
+        var clone = el.cloneNode();
+        if (el._transitionClasses) {
+          el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+        }
+        addClass(clone, moveClass);
+        clone.style.display = 'none';
+        this.$el.appendChild(clone);
+        var info = getTransitionInfo(clone);
+        this.$el.removeChild(clone);
+        return (this._hasMove = info.hasTransform)
+      }
+    }
+  };
+
+  function callPendingCbs (c) {
+    /* istanbul ignore if */
+    if (c.elm._moveCb) {
+      c.elm._moveCb();
+    }
+    /* istanbul ignore if */
+    if (c.elm._enterCb) {
+      c.elm._enterCb();
+    }
+  }
+
+  function recordPosition (c) {
+    c.data.newPos = c.elm.getBoundingClientRect();
+  }
+
+  function applyTranslation (c) {
+    var oldPos = c.data.pos;
+    var newPos = c.data.newPos;
+    var dx = oldPos.left - newPos.left;
+    var dy = oldPos.top - newPos.top;
+    if (dx || dy) {
+      c.data.moved = true;
+      var s = c.elm.style;
+      s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+      s.transitionDuration = '0s';
+    }
+  }
+
+  var platformComponents = {
+    Transition: Transition,
+    TransitionGroup: TransitionGroup
+  };
+
+  /*  */
+
+  // install platform specific utils
+  Vue.config.mustUseProp = mustUseProp;
+  Vue.config.isReservedTag = isReservedTag;
+  Vue.config.isReservedAttr = isReservedAttr;
+  Vue.config.getTagNamespace = getTagNamespace;
+  Vue.config.isUnknownElement = isUnknownElement;
+
+  // install platform runtime directives & components
+  extend(Vue.options.directives, platformDirectives);
+  extend(Vue.options.components, platformComponents);
+
+  // install platform patch function
+  Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+  // public mount method
+  Vue.prototype.$mount = function (
+    el,
+    hydrating
+  ) {
+    el = el && inBrowser ? query(el) : undefined;
+    return mountComponent(this, el, hydrating)
+  };
+
+  // devtools global hook
+  /* istanbul ignore next */
+  if (inBrowser) {
+    setTimeout(function () {
+      if (config.devtools) {
+        if (devtools) {
+          devtools.emit('init', Vue);
+        } else {
+          console[console.info ? 'info' : 'log'](
+            'Download the Vue Devtools extension for a better development experience:\n' +
+            'https://github.com/vuejs/vue-devtools'
+          );
+        }
+      }
+      if (config.productionTip !== false &&
+        typeof console !== 'undefined'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          "You are running Vue in development mode.\n" +
+          "Make sure to turn on production mode when deploying for production.\n" +
+          "See more tips at https://vuejs.org/guide/deployment.html"
+        );
+      }
+    }, 0);
+  }
+
+  /*  */
+
+  return Vue;
+
+}));

web/controller/api.go

@@ -0,0 +1,48 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+)
+type APIController struct {
+	BaseController
+
+	inboundController *InboundController
+	settingController *SettingController
+}
+
+func NewAPIController(g *gin.RouterGroup) *APIController {
+	a := &APIController{}
+	a.initRouter(g)
+	return a
+}
+
+func (a *APIController) initRouter(g *gin.RouterGroup) {
+	g = g.Group("/xui/API/inbounds")
+	g.Use(a.checkLogin)
+
+	g.GET("/", a.inbounds)
+	g.GET("/get/:id", a.inbound)
+	g.POST("/add", a.addInbound)
+	g.POST("/del/:id", a.delInbound)
+	g.POST("/update/:id", a.updateInbound)
+
+	
+	a.inboundController = NewInboundController(g)
+}
+
+
+func (a *APIController) inbounds(c *gin.Context) {
+	a.inboundController.getInbounds(c)
+}
+func (a *APIController) inbound(c *gin.Context) {
+	a.inboundController.getInbound(c)
+}
+func (a *APIController) addInbound(c *gin.Context) {
+	a.inboundController.addInbound(c)
+}
+func (a *APIController) delInbound(c *gin.Context) {
+	a.inboundController.delInbound(c)
+}
+func (a *APIController) updateInbound(c *gin.Context) {
+	a.inboundController.updateInbound(c)
+}

web/controller/base.go

@@ -0,0 +1,33 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+	"x-ui/web/session"
+)
+
+type BaseController struct {
+}
+
+func (a *BaseController) checkLogin(c *gin.Context) {
+	if !session.IsLogin(c) {
+		if isAjax(c) {
+			pureJsonMsg(c, false, I18n(c , "pages.login.loginAgain"))
+		} else {
+			c.Redirect(http.StatusTemporaryRedirect, c.GetString("base_path"))
+		}
+		c.Abort()
+	} else {
+		c.Next()
+	}
+}
+
+
+func I18n(c *gin.Context , name string) string{
+    anyfunc, _  := c.Get("I18n")
+    i18n, _ := anyfunc.(func(key string, params ...string) (string, error))
+
+    message, _ := i18n(name)
+
+    return message;
+}

web/controller/inbound.go

@@ -0,0 +1,136 @@
+package controller
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"strconv"
+	"x-ui/database/model"
+	"x-ui/logger"
+	"x-ui/web/global"
+	"x-ui/web/service"
+	"x-ui/web/session"
+)
+
+type InboundController struct {
+	inboundService service.InboundService
+	xrayService    service.XrayService
+}
+
+func NewInboundController(g *gin.RouterGroup) *InboundController {
+	a := &InboundController{}
+	a.initRouter(g)
+	a.startTask()
+	return a
+}
+
+func (a *InboundController) initRouter(g *gin.RouterGroup) {
+	g = g.Group("/inbound")
+
+	g.POST("/list", a.getInbounds)
+	g.POST("/add", a.addInbound)
+	g.POST("/del/:id", a.delInbound)
+	g.POST("/update/:id", a.updateInbound)
+
+	g.POST("/resetClientTraffic/:email", a.resetClientTraffic)
+	
+
+}
+
+func (a *InboundController) startTask() {
+	webServer := global.GetWebServer()
+	c := webServer.GetCron()
+	c.AddFunc("@every 10s", func() {
+		if a.xrayService.IsNeedRestartAndSetFalse() {
+			err := a.xrayService.RestartXray(false)
+			if err != nil {
+				logger.Error("restart xray failed:", err)
+			}
+		}
+	})
+}
+
+func (a *InboundController) getInbounds(c *gin.Context) {
+	user := session.GetLoginUser(c)
+	inbounds, err := a.inboundService.GetInbounds(user.Id)
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.inbounds.toasts.obtain"), err)
+		return
+	}
+	jsonObj(c, inbounds, nil)
+}
+func (a *InboundController) getInbound(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		jsonMsg(c, I18n(c , "get"), err)
+		return
+	}
+	inbound, err := a.inboundService.GetInbound(id)
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.inbounds.toasts.obtain"), err)
+		return
+	}
+	jsonObj(c, inbound, nil)
+}
+
+func (a *InboundController) addInbound(c *gin.Context) {
+	inbound := &model.Inbound{}
+	err := c.ShouldBind(inbound)
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.inbounds.addTo"), err)
+		return
+	}
+	user := session.GetLoginUser(c)
+	inbound.UserId = user.Id
+	inbound.Enable = true
+	inbound.Tag = fmt.Sprintf("inbound-%v", inbound.Port)
+	inbound, err = a.inboundService.AddInbound(inbound)
+	jsonMsgObj(c, I18n(c , "pages.inbounds.addTo"), inbound, err)
+	if err == nil {
+		a.xrayService.SetToNeedRestart()
+	}
+}
+
+func (a *InboundController) delInbound(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		jsonMsg(c, I18n(c , "delete"), err)
+		return
+	}
+	err = a.inboundService.DelInbound(id)
+	jsonMsgObj(c, I18n(c , "delete"), id, err)
+	if err == nil {
+		a.xrayService.SetToNeedRestart()
+	}
+}
+
+func (a *InboundController) updateInbound(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.inbounds.revise"), err)
+		return
+	}
+	inbound := &model.Inbound{
+		Id: id,
+	}
+	err = c.ShouldBind(inbound)
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.inbounds.revise"), err)
+		return
+	}
+	inbound, err = a.inboundService.UpdateInbound(inbound)
+	jsonMsgObj(c, I18n(c , "pages.inbounds.revise"), inbound, err)
+	if err == nil {
+		a.xrayService.SetToNeedRestart()
+	}
+}
+
+func (a *InboundController) resetClientTraffic(c *gin.Context) {
+	email := c.Param("email")
+
+	err := a.inboundService.ResetClientTraffic(email)
+	if err != nil {
+		jsonMsg(c, "something worng!", err)
+		return
+	}
+	jsonMsg(c, "traffic reseted", nil)
+}

web/controller/index.go

@@ -0,0 +1,84 @@
+package controller
+
+import (
+	"net/http"
+	"time"
+	"x-ui/logger"
+	"x-ui/web/job"
+	"x-ui/web/service"
+	"x-ui/web/session"
+
+	"github.com/gin-gonic/gin"
+)
+
+type LoginForm struct {
+	Username string `json:"username" form:"username"`
+	Password string `json:"password" form:"password"`
+}
+
+type IndexController struct {
+	BaseController
+
+	userService service.UserService
+}
+
+func NewIndexController(g *gin.RouterGroup) *IndexController {
+	a := &IndexController{}
+	a.initRouter(g)
+	return a
+}
+
+func (a *IndexController) initRouter(g *gin.RouterGroup) {
+	g.GET("/", a.index)
+	g.POST("/login", a.login)
+	g.GET("/logout", a.logout)
+}
+
+func (a *IndexController) index(c *gin.Context) {
+	if session.IsLogin(c) {
+		c.Redirect(http.StatusTemporaryRedirect, "xui/")
+		return
+	}
+	html(c, "login.html", "pages.login.title", nil)
+}
+
+func (a *IndexController) login(c *gin.Context) {
+	var form LoginForm
+	err := c.ShouldBind(&form)
+	if err != nil {
+		pureJsonMsg(c, false, I18n(c , "pages.login.toasts.invalidFormData"))
+		return
+	}
+	if form.Username == "" {
+		pureJsonMsg(c, false, I18n(c, "pages.login.toasts.emptyUsername"))
+		return
+	}
+	if form.Password == "" {
+		pureJsonMsg(c, false, I18n(c , "pages.login.toasts.emptyPassword"))
+		return
+	}
+	user := a.userService.CheckUser(form.Username, form.Password)
+	timeStr := time.Now().Format("2006-01-02 15:04:05")
+	if user == nil {
+		job.NewStatsNotifyJob().UserLoginNotify(form.Username, getRemoteIp(c), timeStr, 0)
+		logger.Infof("wrong username or password: \"%s\" \"%s\"", form.Username, form.Password)
+		pureJsonMsg(c, false, I18n(c , "pages.login.toasts.wrongUsernameOrPassword"))
+		return
+	} else {
+		logger.Infof("%s login success,Ip Address:%s\n", form.Username, getRemoteIp(c))
+		job.NewStatsNotifyJob().UserLoginNotify(form.Username, getRemoteIp(c), timeStr, 1)
+	}
+
+	err = session.SetLoginUser(c, user)
+	logger.Info("user", user.Id, "login success")
+	jsonMsg(c, I18n(c , "pages.login.toasts.successLogin"), err)
+}
+
+func (a *IndexController) logout(c *gin.Context) {
+	user := session.GetLoginUser(c)
+	if user != nil {
+		logger.Info("user", user.Id, "logout")
+	}
+	session.ClearSession(c)
+	c.Redirect(http.StatusTemporaryRedirect, c.GetString("base_path"))
+}

web/controller/server.go

@@ -0,0 +1,85 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	"time"
+	"x-ui/web/global"
+	"x-ui/web/service"
+)
+
+type ServerController struct {
+	BaseController
+
+	serverService service.ServerService
+
+	lastStatus        *service.Status
+	lastGetStatusTime time.Time
+
+	lastVersions        []string
+	lastGetVersionsTime time.Time
+}
+
+func NewServerController(g *gin.RouterGroup) *ServerController {
+	a := &ServerController{
+		lastGetStatusTime: time.Now(),
+	}
+	a.initRouter(g)
+	a.startTask()
+	return a
+}
+
+func (a *ServerController) initRouter(g *gin.RouterGroup) {
+	g = g.Group("/server")
+
+	g.Use(a.checkLogin)
+	g.POST("/status", a.status)
+	g.POST("/getXrayVersion", a.getXrayVersion)
+	g.POST("/installXray/:version", a.installXray)
+}
+
+func (a *ServerController) refreshStatus() {
+	a.lastStatus = a.serverService.GetStatus(a.lastStatus)
+}
+
+func (a *ServerController) startTask() {
+	webServer := global.GetWebServer()
+	c := webServer.GetCron()
+	c.AddFunc("@every 2s", func() {
+		now := time.Now()
+		if now.Sub(a.lastGetStatusTime) > time.Minute*3 {
+			return
+		}
+		a.refreshStatus()
+	})
+}
+
+func (a *ServerController) status(c *gin.Context) {
+	a.lastGetStatusTime = time.Now()
+
+	jsonObj(c, a.lastStatus, nil)
+}
+
+func (a *ServerController) getXrayVersion(c *gin.Context) {
+	now := time.Now()
+	if now.Sub(a.lastGetVersionsTime) <= time.Minute {
+		jsonObj(c, a.lastVersions, nil)
+		return
+	}
+
+	versions, err := a.serverService.GetXrayVersions()
+	if err != nil {
+		jsonMsg(c, I18n(c , "getVersion"), err)
+		return
+	}
+
+	a.lastVersions = versions
+	a.lastGetVersionsTime = time.Now()
+
+	jsonObj(c, versions, nil)
+}
+
+func (a *ServerController) installXray(c *gin.Context) {
+	version := c.Param("version")
+	err := a.serverService.UpdateXray(version)
+	jsonMsg(c, I18n(c , "install") + " xray", err)
+}

web/controller/setting.go

@@ -0,0 +1,88 @@
+package controller
+
+import (
+	"errors"
+	"github.com/gin-gonic/gin"
+	"time"
+	"x-ui/web/entity"
+	"x-ui/web/service"
+	"x-ui/web/session"
+)
+
+type updateUserForm struct {
+	OldUsername string `json:"oldUsername" form:"oldUsername"`
+	OldPassword string `json:"oldPassword" form:"oldPassword"`
+	NewUsername string `json:"newUsername" form:"newUsername"`
+	NewPassword string `json:"newPassword" form:"newPassword"`
+}
+
+type SettingController struct {
+	settingService service.SettingService
+	userService    service.UserService
+	panelService   service.PanelService
+}
+
+func NewSettingController(g *gin.RouterGroup) *SettingController {
+	a := &SettingController{}
+	a.initRouter(g)
+	return a
+}
+
+func (a *SettingController) initRouter(g *gin.RouterGroup) {
+	g = g.Group("/setting")
+
+	g.POST("/all", a.getAllSetting)
+	g.POST("/update", a.updateSetting)
+	g.POST("/updateUser", a.updateUser)
+	g.POST("/restartPanel", a.restartPanel)
+}
+
+func (a *SettingController) getAllSetting(c *gin.Context) {
+	allSetting, err := a.settingService.GetAllSetting()
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.setting.toasts.getSetting"), err)
+		return
+	}
+	jsonObj(c, allSetting, nil)
+}
+
+func (a *SettingController) updateSetting(c *gin.Context) {
+	allSetting := &entity.AllSetting{}
+	err := c.ShouldBind(allSetting)
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.setting.toasts.modifySetting"), err)
+		return
+	}
+	err = a.settingService.UpdateAllSetting(allSetting)
+	jsonMsg(c, I18n(c , "pages.setting.toasts.modifySetting"), err)
+}
+
+func (a *SettingController) updateUser(c *gin.Context) {
+	form := &updateUserForm{}
+	err := c.ShouldBind(form)
+	if err != nil {
+		jsonMsg(c, I18n(c , "pages.setting.toasts.modifySetting"), err)
+		return
+	}
+	user := session.GetLoginUser(c)
+	if user.Username != form.OldUsername || user.Password != form.OldPassword {
+		jsonMsg(c, I18n(c , "pages.setting.toasts.modifyUser"), errors.New(I18n(c , "pages.setting.toasts.originalUserPassIncorrect")))
+		return
+	}
+	if form.NewUsername == "" || form.NewPassword == "" {
+		jsonMsg(c,I18n(c , "pages.setting.toasts.modifyUser"), errors.New(I18n(c , "pages.setting.toasts.userPassMustBeNotEmpty")))
+		return
+	}
+	err = a.userService.UpdateUser(user.Id, form.NewUsername, form.NewPassword)
+	if err == nil {
+		user.Username = form.NewUsername
+		user.Password = form.NewPassword
+		session.SetLoginUser(c, user)
+	}
+	jsonMsg(c, I18n(c , "pages.setting.toasts.modifyUser"), err)
+}
+
+func (a *SettingController) restartPanel(c *gin.Context) {
+	err := a.panelService.RestartPanel(time.Second * 3)
+	jsonMsg(c, I18n(c , "pages.setting.restartPanel"), err)
+}

web/controller/util.go

@@ -0,0 +1,97 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	"net"
+	"net/http"
+	"strings"
+	"x-ui/config"
+	"x-ui/logger"
+	"x-ui/web/entity"
+)
+
+func getUriId(c *gin.Context) int64 {
+	s := struct {
+		Id int64 `uri:"id"`
+	}{}
+
+	_ = c.BindUri(&s)
+	return s.Id
+}
+
+func getRemoteIp(c *gin.Context) string {
+	value := c.GetHeader("X-Forwarded-For")
+	if value != "" {
+		ips := strings.Split(value, ",")
+		return ips[0]
+	} else {
+		addr := c.Request.RemoteAddr
+		ip, _, _ := net.SplitHostPort(addr)
+		return ip
+	}
+}
+
+func jsonMsg(c *gin.Context, msg string, err error) {
+	jsonMsgObj(c, msg, nil, err)
+}
+
+func jsonObj(c *gin.Context, obj interface{}, err error) {
+	jsonMsgObj(c, "", obj, err)
+}
+
+func jsonMsgObj(c *gin.Context, msg string, obj interface{}, err error) {
+	m := entity.Msg{
+		Obj: obj,
+	}
+	if err == nil {
+		m.Success = true
+		if msg != "" {
+			m.Msg = msg + I18n(c , "success")
+		}
+	} else {
+		m.Success = false
+		m.Msg = msg + I18n(c , "fail") + ": " + err.Error()
+		logger.Warning(msg + I18n(c , "fail") + ": ", err)
+	}
+	c.JSON(http.StatusOK, m)
+}
+
+func pureJsonMsg(c *gin.Context, success bool, msg string) {
+	if success {
+		c.JSON(http.StatusOK, entity.Msg{
+			Success: true,
+			Msg:     msg,
+		})
+	} else {
+		c.JSON(http.StatusOK, entity.Msg{
+			Success: false,
+			Msg:     msg,
+		})
+	}
+}
+
+func html(c *gin.Context, name string, title string, data gin.H) {
+	if data == nil {
+		data = gin.H{}
+	}
+	data["title"] = title
+	data["request_uri"] = c.Request.RequestURI
+	data["base_path"] = c.GetString("base_path")
+	c.HTML(http.StatusOK, name, getContext(data))
+}
+
+func getContext(h gin.H) gin.H {
+	a := gin.H{
+		"cur_ver": config.GetVersion(),
+	}
+	if h != nil {
+		for key, value := range h {
+			a[key] = value
+		}
+	}
+	return a
+}
+
+func isAjax(c *gin.Context) bool {
+	return c.GetHeader("X-Requested-With") == "XMLHttpRequest"
+}

web/controller/xui.go

@@ -0,0 +1,42 @@
+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+type XUIController struct {
+	BaseController
+
+	inboundController *InboundController
+	settingController *SettingController
+}
+
+func NewXUIController(g *gin.RouterGroup) *XUIController {
+	a := &XUIController{}
+	a.initRouter(g)
+	return a
+}
+
+func (a *XUIController) initRouter(g *gin.RouterGroup) {
+	g = g.Group("/xui")
+	g.Use(a.checkLogin)
+
+	g.GET("/", a.index)
+	g.GET("/inbounds", a.inbounds)
+	g.GET("/setting", a.setting)
+
+	a.inboundController = NewInboundController(g)
+	a.settingController = NewSettingController(g)
+}
+
+func (a *XUIController) index(c *gin.Context) {
+	html(c, "index.html", "pages.index.title", nil)
+}
+
+func (a *XUIController) inbounds(c *gin.Context) {
+	html(c, "inbounds.html", "pages.inbounds.title", nil)
+}
+
+func (a *XUIController) setting(c *gin.Context) {
+	html(c, "setting.html", "pages.setting.title", nil)
+}

web/entity/entity.go

@@ -0,0 +1,82 @@
+package entity
+
+import (
+	"crypto/tls"
+	"encoding/json"
+	"net"
+	"strings"
+	"time"
+	"x-ui/util/common"
+	"x-ui/xray"
+)
+
+type Msg struct {
+	Success bool        `json:"success"`
+	Msg     string      `json:"msg"`
+	Obj     interface{} `json:"obj"`
+}
+
+type Pager struct {
+	Current  int         `json:"current"`
+	PageSize int         `json:"page_size"`
+	Total    int         `json:"total"`
+	OrderBy  string      `json:"order_by"`
+	Desc     bool        `json:"desc"`
+	Key      string      `json:"key"`
+	List     interface{} `json:"list"`
+}
+
+type AllSetting struct {
+	WebListen          string `json:"webListen" form:"webListen"`
+	WebPort            int    `json:"webPort" form:"webPort"`
+	WebCertFile        string `json:"webCertFile" form:"webCertFile"`
+	WebKeyFile         string `json:"webKeyFile" form:"webKeyFile"`
+	WebBasePath        string `json:"webBasePath" form:"webBasePath"`
+	TgBotEnable        bool   `json:"tgBotEnable" form:"tgBotEnable"`
+	TgBotToken         string `json:"tgBotToken" form:"tgBotToken"`
+	TgBotChatId        int    `json:"tgBotChatId" form:"tgBotChatId"`
+	TgRunTime          string `json:"tgRunTime" form:"tgRunTime"`
+	XrayTemplateConfig string `json:"xrayTemplateConfig" form:"xrayTemplateConfig"`
+
+	TimeLocation string `json:"timeLocation" form:"timeLocation"`
+}
+
+func (s *AllSetting) CheckValid() error {
+	if s.WebListen != "" {
+		ip := net.ParseIP(s.WebListen)
+		if ip == nil {
+			return common.NewError("web listen is not valid ip:", s.WebListen)
+		}
+	}
+
+	if s.WebPort <= 0 || s.WebPort > 65535 {
+		return common.NewError("web port is not a valid port:", s.WebPort)
+	}
+
+	if s.WebCertFile != "" || s.WebKeyFile != "" {
+		_, err := tls.LoadX509KeyPair(s.WebCertFile, s.WebKeyFile)
+		if err != nil {
+			return common.NewErrorf("cert file <%v> or key file <%v> invalid: %v", s.WebCertFile, s.WebKeyFile, err)
+		}
+	}
+
+	if !strings.HasPrefix(s.WebBasePath, "/") {
+		s.WebBasePath = "/" + s.WebBasePath
+	}
+	if !strings.HasSuffix(s.WebBasePath, "/") {
+		s.WebBasePath += "/"
+	}
+
+	xrayConfig := &xray.Config{}
+	err := json.Unmarshal([]byte(s.XrayTemplateConfig), xrayConfig)
+	if err != nil {
+		return common.NewError("xray template config invalid:", err)
+	}
+
+	_, err = time.LoadLocation(s.TimeLocation)
+	if err != nil {
+		return common.NewError("time location not exist:", s.TimeLocation)
+	}
+
+	return nil
+}

web/global/global.go

@@ -0,0 +1,22 @@
+package global
+
+import (
+	"context"
+	"github.com/robfig/cron/v3"
+	_ "unsafe"
+)
+
+var webServer WebServer
+
+type WebServer interface {
+	GetCron() *cron.Cron
+	GetCtx() context.Context
+}
+
+func SetWebServer(s WebServer) {
+	webServer = s
+}
+
+func GetWebServer() WebServer {
+	return webServer
+}

web/html/common/head.html

@@ -0,0 +1,17 @@
+{{define "head"}}
+<head>
+    <meta charset="UTF-8">
+    <meta name="renderer" content="webkit">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="{{ .base_path }}assets/[email protected]/antd.min.css">
+    <link rel="stylesheet" href="{{ .base_path }}assets/[email protected]/theme-chalk/display.css">
+    <link rel="stylesheet" href="{{ .base_path }}assets/css/custom.css?{{ .cur_ver }}">
+    <style>
+        [v-cloak] {
+            display: none;
+        }
+    </style>
+    <title>{{ i18n .title}}</title>
+</head>
+{{end}}

web/html/common/js.html

@@ -0,0 +1,22 @@
+{{define "js"}}
+<script src="{{ .base_path }}assets/[email protected]/vue.min.js"></script>
+<script src="{{ .base_path }}assets/moment/moment.min.js"></script>
+<script src="{{ .base_path }}assets/[email protected]/antd.min.js"></script>
+<script src="{{ .base_path }}assets/base64/base64.min.js"></script>
+<script src="{{ .base_path }}assets/axios/axios.min.js"></script>
+<script src="{{ .base_path }}assets/qs/qs.min.js"></script>
+<script src="{{ .base_path }}assets/qrcode/qrious.min.js"></script>
+<script src="{{ .base_path }}assets/clipboard/clipboard.min.js"></script>
+<script src="{{ .base_path }}assets/uri/URI.min.js"></script>
+<script src="{{ .base_path }}assets/js/axios-init.js?{{ .cur_ver }}"></script>
+<script src="{{ .base_path }}assets/js/util/common.js?{{ .cur_ver }}"></script>
+<script src="{{ .base_path }}assets/js/util/date-util.js?{{ .cur_ver }}"></script>
+<script src="{{ .base_path }}assets/js/util/utils.js?{{ .cur_ver }}"></script>
+<script src="{{ .base_path }}assets/js/model/xray.js?{{ .cur_ver }}"></script>
+<script src="{{ .base_path }}assets/js/model/models.js?{{ .cur_ver }}"></script>
+<script src="{{ .base_path }}assets/js/langs.js"></script>
+<script>
+    const basePath = '{{ .base_path }}';
+    axios.defaults.baseURL = basePath;
+</script>
+{{end}}

web/html/common/prompt_modal.html

@@ -0,0 +1,67 @@
+{{define "promptModal"}}
+<a-modal id="prompt-modal" v-model="promptModal.visible" :title="promptModal.title"
+         :closable="true" @ok="promptModal.ok" :mask-closable="false"
+         :ok-text="promptModal.okText" cancel-text='{{ i18n "cancel" }}'>
+    <a-input id="prompt-modal-input" :type="promptModal.type"
+             v-model="promptModal.value"
+             :autosize="{minRows: 10, maxRows: 20}"
+             @keydown.enter.native="promptModal.keyEnter"
+             @keydown.ctrl.83="promptModal.ctrlS"></a-input>
+</a-modal>
+
+<script>
+
+    const promptModal = {
+        title: '',
+        type: '',
+        value: '',
+        okText: '{{ i18n "sure"}}',
+        visible: false,
+        keyEnter(e) {
+            if (this.type !== 'textarea') {
+                e.preventDefault();
+                this.ok();
+            }
+        },
+        ctrlS(e) {
+            if (this.type === 'textarea') {
+                e.preventDefault();
+                promptModal.confirm(promptModal.value);
+            }
+        },
+        ok() {
+            promptModal.close();
+            promptModal.confirm(promptModal.value);
+        },
+        confirm() {},
+        open({
+                title='',
+                type='text',
+                value='',
+                okText='{{ i18n "sure"}}',
+                confirm=() => {},
+            }) {
+            this.title = title;
+            this.type = type;
+            this.value = value;
+            this.okText = okText;
+            this.confirm = confirm;
+            this.visible = true;
+            promptModalApp.$nextTick(() => {
+                document.querySelector('#prompt-modal-input').focus();
+            });
+        },
+        close() {
+            this.visible = false;
+        }
+    };
+
+    const promptModalApp = new Vue({
+        el: '#prompt-modal',
+        data: {
+            promptModal: promptModal,
+        },
+    });
+
+</script>
+{{end}}

web/html/common/qrcode_modal.html

@@ -0,0 +1,120 @@
+{{define "qrcodeModal"}}
+<a-modal id="qrcode-modal" v-model="qrModal.visible" :title="qrModal.title"
+         :closable="true" width="300px" :ok-text="qrModal.okText"
+         cancel-text='{{ i18n "close" }}' :ok-button-props="{attrs:{id:'qr-modal-ok-btn'}}">
+    <a-tag color="green" style="margin-bottom: 10px;display: block;text-align: center;" >click on QR Code to Copy</a-tag>
+    <canvas v-if="qrModal.inbound.protocol != Protocols.VMESS && qrModal.inbound.protocol != Protocols.VLESS" id="qrCode" style="width: 100%; height: 100%;"></canvas>
+
+    <template v-if="qrModal.inbound.protocol === Protocols.VMESS" v-for="(vmess, index) in qrModal.inbound.settings.vmesses">
+        <a-tag color="red" style="margin-bottom: 10px;display: block;text-align: center;" v-text="vmess.email"></a-tag>
+        <canvas @click="copyTextToClipboard(`qrCode-vmess-${vmess.id}`,index)" :id="`qrCode-vmess-${vmess.id}`" style="width: 100%; height: 100%;"></canvas>
+        <a-divider style="height: 2px; background-color: #7e7e7e" />
+    </template>
+
+    <template v-if="qrModal.inbound.protocol === Protocols.VLESS" v-for="(vless, index) in qrModal.inbound.settings.vlesses">
+        <a-tag color="red" style="margin-bottom: 10px;display: block;text-align: center;" v-text="vless.email"></a-tag>
+        <canvas @click="copyTextToClipboard(`qrCode-vless-${vless.id}`,index)" :id="`qrCode-vless-${vless.id}`" style="width: 100%; height: 100%;"></canvas>
+        <a-divider style="height: 2px; background-color: #7e7e7e" />
+    </template>
+</a-modal>
+
+<script>
+
+    const qrModal = {
+        title: '',
+        content: '',
+        inbound: new Inbound(),
+        dbInbound: new DBInbound(),
+        okText: '',
+        copyText: '',
+        qrcode: null,
+        clipboard: null,
+        visible: false,
+        show: function (title='', content='', dbInbound=new DBInbound(),okText='{{ i18n "copy" }}', copyText='') {
+            this.title = title;
+            this.content = content;
+            this.dbInbound = dbInbound;
+            this.inbound = dbInbound.toInbound();
+            this.okText = okText;
+            if (ObjectUtil.isEmpty(copyText)) {
+                this.copyText = content;
+            } else {
+                this.copyText = copyText;
+            }
+            this.visible = true;
+            qrModalApp.$nextTick(() => {
+                if (this.clipboard === null) {
+                    this.clipboard = new ClipboardJS('#qr-modal-ok-btn', {
+                        text: () => this.copyText,
+                    });
+                    this.clipboard.on('success', () => app.$message.success('{{ i18n "copied" }}'));
+                }
+                if (this.qrcode === null) {
+                    this.qrcode = new QRious({
+                        element: document.querySelector('#qrCode'),
+                        size: 260,
+                        value: content,
+                    });
+                } else {
+                    this.qrcode.value = content;
+                }
+            });
+        },
+        close: function () {
+            this.visible = false;
+        },
+    };
+
+    const qrModalApp = new Vue({
+        el: '#qrcode-modal',
+        data: {
+            qrModal: qrModal,
+        },
+        methods: {
+            setQrCode(elmentId,index) {
+                content = qrModal.inbound.genLink(qrModal.dbInbound.address,qrModal.dbInbound.remark,index)
+
+                new QRious({
+                        element: document.querySelector('#'+elmentId),
+                        size: 260,
+                        value: content,
+                    });
+            },
+            copyTextToClipboard(elmentId,index) {
+                link = qrModal.inbound.genLink(qrModal.dbInbound.address,qrModal.dbInbound.remark,index)
+                this.qrModal.copyText = link
+
+                this.qrModal.clipboard = new ClipboardJS('#' + elmentId, {
+                        text: () => link,
+                    });
+                this.qrModal.clipboard.on('success', () => { 
+                    app.$message.success('{{ i18n "copied" }}')
+                    this.qrModal.clipboard.destroy();
+                });
+
+
+            }
+        },
+        updated()  {
+            switch (qrModal.inbound.protocol) {
+                    case Protocols.VMESS: 
+                        vmesses = qrModal.inbound.settings.vmesses
+                        for (const index in vmesses) {
+                            this.setQrCode("qrCode-vmess-" + vmesses[index].id ,index)
+                        }
+                    break;
+                    case Protocols.VLESS: 
+                        vlesses = qrModal.inbound.settings.vlesses
+
+                        for (const index in vlesses) {
+                            this.setQrCode("qrCode-vless-" + vlesses[index].id ,index)
+                        }
+                    break;
+                    default: return null;
+            }
+
+        }
+    });
+
+</script>
+{{end}}

web/html/common/text_modal.html

@@ -0,0 +1,58 @@
+{{define "textModal"}}
+<a-modal id="text-modal" v-model="txtModal.visible" :title="txtModal.title"
+         :closable="true" ok-text='{{ i18n "copy" }}' cancel-text='{{ i18n "close" }}'
+         :ok-button-props="{attrs:{id:'txt-modal-ok-btn'}}">
+    <a-button v-if="!ObjectUtil.isEmpty(txtModal.fileName)" type="primary" style="margin-bottom: 10px;"
+              @click="downloader.download(txtModal.fileName, txtModal.content)">
+        {{ i18n "download" }} [[ txtModal.fileName ]]
+    </a-button>
+    <a-input type="textarea" v-model="txtModal.content"
+             :autosize="{ minRows: 10, maxRows: 20}"></a-input>
+</a-modal>
+
+<script>
+
+    const txtModal = {
+        title: '',
+        content: '',
+        fileName: '',
+        qrcode: null,
+        clipboard: null,
+        visible: false,
+        show: function (title='', content='', fileName='') {
+            this.title = title;
+            this.content = content;
+            this.fileName = fileName;
+            this.visible = true;
+            textModalApp.$nextTick(() => {
+                if (this.clipboard === null) {
+                    this.clipboard = new ClipboardJS('#txt-modal-ok-btn', {
+                        text: () => this.content,
+                    });
+                    this.clipboard.on('success', () => app.$message.success('{{ i18n "copied" }}'));
+                }
+                if (this.qrcode === null) {
+                    this.qrcode = new QRious({
+                        element: document.querySelector('#qrCode'),
+                        size: 260,
+                        value: content,
+                    });
+                } else {
+                    this.qrcode.value = content;
+                }
+            });
+        },
+        close: function () {
+            this.visible = false;
+        },
+    };
+
+    const textModalApp = new Vue({
+        el: '#text-modal',
+        data: {
+            txtModal: txtModal,
+        },
+    });
+
+</script>
+{{end}}

web/html/login.html

@@ -0,0 +1,123 @@
+<!DOCTYPE html>
+<html lang="en">
+{{template "head" .}}
+<style>
+
+    #app {
+        padding-top: 100px;
+    }
+
+    h1 {
+        text-align: center;
+        color: #fff;
+        margin: 20px 0 50px 0;
+    }
+
+    .ant-btn, .ant-input {
+        height: 50px;
+        border-radius: 30px;
+    }
+
+    .ant-input-affix-wrapper .ant-input-prefix {
+        left: 23px;
+    }
+
+    .ant-input-affix-wrapper .ant-input:not(:first-child) {
+        padding-left: 50px;
+    }
+
+    .selectLang{
+        display: flex;
+        text-align: center;
+        justify-content: center;
+    }
+
+</style>
+<body>
+<a-layout id="app" v-cloak>
+    <transition name="list" appear>
+        <a-layout-content>
+            <a-row type="flex" justify="center">
+                <a-col :xs="22" :sm="20" :md="16" :lg="12" :xl="8">
+                    <h1>{{ i18n "pages.login.title" }}</h1>
+                </a-col>
+            </a-row>
+            <a-row type="flex" justify="center">
+                <a-col :xs="22" :sm="20" :md="16" :lg="12" :xl="8">
+                    <a-form>
+                        <a-form-item>
+                            <a-input v-model.trim="user.username" placeholder='{{ i18n "username" }}'
+                                     @keydown.enter.native="login" autofocus>
+                                <a-icon slot="prefix" type="user" style="color: rgba(0,0,0,.25)"/>
+                            </a-input>
+                        </a-form-item>
+                        <a-form-item>
+                            <a-input type="password" v-model.trim="user.password"
+                                     placeholder='{{ i18n "password" }}' @keydown.enter.native="login">
+                                <a-icon slot="prefix" type="lock" style="color: rgba(0,0,0,.25)"/>
+                            </a-input>
+                        </a-form-item>
+                        <a-form-item>
+                            <a-button block @click="login" :loading="loading">{{ i18n "login" }}</a-button>
+                        </a-form-item>
+                        <a-form-item>
+
+                            <a-row justify="center" class="selectLang">
+                                <a-col :span="4"><span>Language : </span></a-col>
+
+                                <a-col :span="6">
+                                    <a-select
+                                            ref="selectLang"
+                                            v-model="lang"
+                                            @change="setLang(lang)"
+                                    >
+                                        <a-select-option  :value="l.value" label="China" v-for="l in supportLangs" >
+                                            <span role="img" aria-label="l.name" v-text="l.icon"></span>
+                                            &nbsp;&nbsp;<span v-text="l.name"></span>
+                                        </a-select-option>
+                                    </a-select>
+                                </a-col>
+
+                            </a-row>
+
+
+
+                        </a-form-item>
+                    </a-form>
+                </a-col>
+            </a-row>
+        </a-layout-content>
+    </transition>
+</a-layout>
+{{template "js" .}}
+<script>
+    const leftColor = RandomUtil.randomIntRange(0x222222, 0xFFFFFF / 2).toString(16);
+    const rightColor = RandomUtil.randomIntRange(0xFFFFFF / 2, 0xDDDDDD).toString(16);
+    const deg = RandomUtil.randomIntRange(0, 360);
+    const background = `linear-gradient(${deg}deg, #${leftColor} 10%, #${rightColor} 100%)`;
+    document.querySelector('#app').style.background = background;
+    const app = new Vue({
+        delimiters: ['[[', ']]'],
+        el: '#app',
+        data: {
+            loading: false,
+            user: new User(),
+            lang : ""
+        },
+        created(){
+          this.lang = getLang();
+        },
+        methods: {
+            async login() {
+                this.loading = true;
+                const msg = await HttpUtil.post('/login', this.user);
+                this.loading = false;
+                if (msg.success) {
+                    location.href = basePath + 'xui/';
+                }
+            }
+        }
+    });
+</script>
+</body>
+</html>

web/html/xui/common_sider.html

@@ -0,0 +1,73 @@
+{{define "menuItems"}}
+<a-menu-item key="{{ .base_path }}xui/">
+    <a-icon type="dashboard"></a-icon>
+    <span>{{ i18n "menu.dashboard"}}</span>
+</a-menu-item>
+<a-menu-item key="{{ .base_path }}xui/inbounds">
+    <a-icon type="user"></a-icon>
+    <span>{{ i18n "menu.inbounds"}}</span>
+</a-menu-item>
+<a-menu-item key="{{ .base_path }}xui/setting">
+    <a-icon type="setting"></a-icon>
+    <span>{{ i18n "menu.setting"}}</span>
+</a-menu-item>
+<!--<a-menu-item key="{{ .base_path }}xui/clients">-->
+<!--    <a-icon type="laptop"></a-icon>-->
+<!--    <span>client</span>-->
+<!--</a-menu-item>-->
+<a-sub-menu>
+    <template slot="title">
+        <a-icon type="link"></a-icon>
+        <span>others</span>
+    </template>
+    <a-menu-item key="https://github.com/mhsanaei/3x-ui/">
+        <a-icon type="github"></a-icon>
+        <span>Github</span>
+    </a-menu-item>
+    <a-menu-item key="https://t.me/xxxuiforever">
+        <a-icon type="usergroup-add"></a-icon>
+        <span>Telegram Group</span>
+    </a-menu-item>
+</a-sub-menu>
+<a-menu-item key="{{ .base_path }}logout">
+    <a-icon type="logout"></a-icon>
+    <span>{{ i18n "menu.logout"}}</span>
+</a-menu-item>
+{{end}}
+
+
+{{define "commonSider"}}
+<a-layout-sider id="sider" collapsible breakpoint="md" collapsed-width="0">
+    <a-menu theme="dark" mode="inline" :selected-keys="['{{ .request_uri }}']"
+            @click="({key}) => key.startsWith('http') ? window.open(key) : location.href = key">
+        {{template "menuItems" .}}
+    </a-menu>
+</a-layout-sider>
+<a-drawer id="sider-drawer" placement="left" :closable="false"
+          @close="siderDrawer.close()"
+          :visible="siderDrawer.visible" :wrap-style="{ padding: 0 }">
+    <div class="drawer-handle" @click="siderDrawer.change()" slot="handle">
+        <a-icon :type="siderDrawer.visible ? 'close' : 'menu-fold'"></a-icon>
+    </div>
+    <a-menu theme="light" mode="inline" :selected-keys="['{{ .request_uri }}']"
+        @click="({key}) => key.startsWith('http') ? window.open(key) : location.href = key">
+        {{template "menuItems" .}}
+    </a-menu>
+</a-drawer>
+<script>
+
+    const siderDrawer = {
+        visible: false,
+        show() {
+            this.visible = true;
+        },
+        close() {
+            this.visible = false;
+        },
+        change() {
+            this.visible = !this.visible;
+        }
+    };
+
+</script>
+{{end}}

web/html/xui/component/inbound_info.html

@@ -0,0 +1,94 @@
+{{define "inboundInfoStream"}}
+<p>{{ i18n "transmission" }}: <a-tag color="green">[[ inbound.network ]]</a-tag></p>
+
+<template v-if="inbound.isTcp || inbound.isWs || inbound.isH2">
+    <p v-if="inbound.host">host: <a-tag color="green">[[ inbound.host ]]</a-tag></p>
+    <p v-else>{{ i18n "host" }}: <a-tag color="orange">{{ i18n "none" }}</a-tag></p>
+
+    <p v-if="inbound.path">path: <a-tag color="green">[[ inbound.path ]]</a-tag></p>
+    <p v-else>{{ i18n "path" }}: <a-tag color="orange">{{ i18n "none" }}</a-tag></p>
+</template>
+
+<template v-if="inbound.isQuic">
+    <p>quic {{ i18n "encryption" }}: <a-tag color="green">[[ inbound.quicSecurity ]]</a-tag></p>
+    <p>quic {{ i18n "password" }}: <a-tag color="green">[[ inbound.quicKey ]]</a-tag></p>
+    <p>quic {{ i18n "camouflage" }}: <a-tag color="green">[[ inbound.quicType ]]</a-tag></p>
+</template>
+
+<template v-if="inbound.isKcp">
+    <p>kcp {{ i18n "encryption" }}: <a-tag color="green">[[ inbound.kcpType ]]</a-tag></p>
+    <p>kcp {{ i18n "password" }}: <a-tag color="green">[[ inbound.kcpSeed ]]</a-tag></p>
+</template>
+
+<template v-if="inbound.isGrpc">
+    <p>grpc serviceName: <a-tag color="green">[[ inbound.serviceName ]]</a-tag></p>
+</template>
+
+<template v-if="inbound.tls || inbound.xtls">
+    <p v-if="inbound.tls">tls: <a-tag color="green">{{ i18n "turnOn" }}</a-tag></p>
+    <p v-if="inbound.xtls">xtls: <a-tag color="green">{{ i18n "turnOn" }}</a-tag></p>
+</template>
+<template v-else>
+    <p>tls: <a-tag color="red">{{ i18n "closure" }}</a-tag></p>
+</template>
+<p v-if="inbound.tls">
+    tls {{ i18n "domainName" }}: <a-tag :color="inbound.serverName ? 'green' : 'orange'">[[ inbound.serverName ? inbound.serverName : '' ]]</a-tag>
+</p>
+<p v-if="inbound.xtls">
+    xtls {{ i18n "domainName" }}: <a-tag :color="inbound.serverName ? 'green' : 'orange'">[[ inbound.serverName ? inbound.serverName : '' ]]</a-tag>
+</p>
+{{end}}
+
+
+{{define "component/inboundInfoComponent"}}
+<div>
+    <p>{{ i18n "protocol"}}: <a-tag color="green">[[ dbInbound.protocol ]]</a-tag></p>
+    <p>{{ i18n "pages.inbounds.address"}}: <a-tag color="blue">[[ dbInbound.address ]]</a-tag></p>
+    <p>{{ i18n "pages.inbounds.port"}}: <a-tag color="green">[[ dbInbound.port ]]</a-tag></p>
+
+    <template v-if="dbInbound.isVMess" v-for="(vmess, index) in inbound.settings.vmesses">
+        <p>uuid: <a-tag color="green">[[ vmess.id ]]</a-tag></p>
+        <p>alterId: <a-tag color="green">[[ vmess.alterId ]]</a-tag></p>
+        <a-divider style="height: 2px; background-color: #7e7e7e" />
+    </template>
+
+    <template v-if="dbInbound.isVLess" v-for="(vless, index) in inbound.settings.vlesses">
+        <p>uuid: <a-tag color="green">[[ vless.id ]]</a-tag></p>
+        <p v-if="inbound.isXTls">flow: <a-tag color="green">[[ vless.flow ]]</a-tag></p>
+        <a-divider style="height: 2px; background-color: #7e7e7e" />
+    </template>
+
+    <template v-if="dbInbound.isTrojan">
+        <p>{{ i18n "password"}}: <a-tag color="green">[[ inbound.password ]]</a-tag></p>
+    </template>
+
+    <template v-if="dbInbound.isSS">
+        <p>{{ i18n "encryption"}}: <a-tag color="green">[[ inbound.method ]]</a-tag></p>
+        <p>{{ i18n "password"}}: <a-tag color="green">[[ inbound.password ]]</a-tag></p>
+    </template>
+
+    <template v-if="dbInbound.isSocks">
+        <p>{{ i18n "username"}}: <a-tag color="green">[[ inbound.username ]]</a-tag></p>
+        <p>{{ i18n "password"}}: <a-tag color="green">[[ inbound.password ]]</a-tag></p>
+    </template>
+
+    <template v-if="dbInbound.isHTTP">
+        <p>{{ i18n "username"}}: <a-tag color="green">[[ inbound.username ]]</a-tag></p>
+        <p>{{ i18n "password"}}: <a-tag color="green">[[ inbound.password ]]</a-tag></p>
+    </template>
+
+    <template v-if="dbInbound.isVMess || dbInbound.isVLess || dbInbound.isTrojan || dbInbound.isSS">
+        {{template "inboundInfoStream"}}
+    </template>
+</div>
+{{end}}
+
+{{define "component/inboundInfo"}}
+<script>
+    Vue.component('inbound-info', {
+        delimiters: ['[[', ']]'],
+        props: ["dbInbound", "inbound"],
+        template: `{{template "component/inboundInfoComponent"}}`,
+    });
+</script>
+{{end}}

web/html/xui/component/setting.html

@@ -0,0 +1,32 @@
+{{define "component/settingListItem"}}
+<a-list-item style="padding: 20px">
+    <a-row>
+        <a-col :lg="24" :xl="12">
+            <a-list-item-meta :title="title" :description="desc"/>
+        </a-col>
+        <a-col :lg="24" :xl="12">
+            <template v-if="type === 'text'">
+                <a-input :value="value" @input="$emit('input', $event.target.value)"></a-input>
+            </template>
+            <template v-else-if="type === 'number'">
+                <a-input type="number" :value="value" @input="$emit('input', $event.target.value)"></a-input>
+            </template>
+            <template v-else-if="type === 'textarea'">
+                <a-textarea :value="value" @input="$emit('input', $event.target.value)" :auto-size="{ minRows: 10, maxRows: 10 }"></a-textarea>
+            </template>
+            <template v-else-if="type === 'switch'">
+                <a-switch :checked="value" @change="value => $emit('input', value)"></a-switch>
+            </template>
+        </a-col>
+    </a-row>
+</a-list-item>
+{{end}}
+
+{{define "component/setting"}}
+<script>
+    Vue.component('setting-list-item', {
+        props: ["type", "title", "desc", "value"],
+        template: `{{template "component/settingListItem"}}`,
+    });
+</script>
+{{end}}

web/html/xui/form/inbound.html

@@ -0,0 +1,106 @@
+{{define "form/inbound"}}
+<!-- base -->
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "remark" }}'>
+        <a-input v-model.trim="dbInbound.remark"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "enable" }}'>
+        <a-switch v-model="dbInbound.enable"></a-switch>
+    </a-form-item>
+    <a-form-item label='{{ i18n "protocol" }}'>
+        <a-select v-model="inbound.protocol" style="width: 160px;">
+            <a-select-option v-for="p in Protocols" :key="p" :value="p">[[ p ]]</a-select-option>
+        </a-select>
+    </a-form-item>
+    <a-form-item>
+        <span slot="label">
+            {{ i18n "monitor" }}
+            <a-tooltip>
+                <template slot="title">
+                    <span>{{ i18n "pages.inbounds.monitorDesc" }}</span>
+                </template>
+                <a-icon type="question-circle" theme="filled"></a-icon>
+            </a-tooltip>
+        </span>
+        <a-input v-model.trim="inbound.listen"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.port" }}'>
+        <a-input type="number" v-model.number="inbound.port"></a-input>
+    </a-form-item>
+    <a-form-item>
+        <span slot="label">
+            <span >{{ i18n "pages.inbounds.totalFlow" }}</span>(GB)
+            <a-tooltip>
+                <template slot="title">
+                    0 <span>{{ i18n "pages.inbounds.meansNoLimit" }}</span>
+                </template>
+                <a-icon type="question-circle" theme="filled"></a-icon>
+            </a-tooltip>
+        </span>
+        <a-input-number v-model="dbInbound.totalGB" :min="0"></a-input-number>
+    </a-form-item>
+    <a-form-item>
+        <span slot="label">
+            <span >{{ i18n "pages.inbounds.expireDate" }}</span>
+            <a-tooltip>
+                <template slot="title">
+                    <span>{{ i18n "pages.inbounds.leaveBlankToNeverExpire" }}</span>
+                </template>
+                <a-icon type="question-circle" theme="filled"></a-icon>
+            </a-tooltip>
+        </span>
+        <a-date-picker :show-time="{ format: 'HH:mm' }" format="YYYY-MM-DD HH:mm"
+                       v-model="dbInbound._expiryTime" style="width: 300px;"></a-date-picker>
+    </a-form-item>
+</a-form>
+
+<!-- vmess settings -->
+<template v-if="inbound.protocol === Protocols.VMESS">
+    {{template "form/vmess"}}
+</template>
+
+<!-- vless settings -->
+<template v-if="inbound.protocol === Protocols.VLESS">
+    {{template "form/vless"}}
+</template>
+
+<!-- trojan settings -->
+<template v-if="inbound.protocol === Protocols.TROJAN">
+    {{template "form/trojan"}}
+</template>
+
+<!-- shadowsocks -->
+<template v-if="inbound.protocol === Protocols.SHADOWSOCKS">
+    {{template "form/shadowsocks"}}
+</template>
+
+<!-- dokodemo-door -->
+<template v-if="inbound.protocol === Protocols.DOKODEMO">
+    {{template "form/dokodemo"}}
+</template>
+
+<!-- socks -->
+<template v-if="inbound.protocol === Protocols.SOCKS">
+    {{template "form/socks"}}
+</template>
+
+<!-- http -->
+<template v-if="inbound.protocol === Protocols.HTTP">
+    {{template "form/http"}}
+</template>
+
+<!-- stream settings -->
+<template v-if="inbound.canEnableStream()">
+    {{template "form/streamSettings"}}
+</template>
+
+<!-- tls settings -->
+<template v-if="inbound.canEnableTls()">
+    {{template "form/tlsSettings"}}
+</template>
+
+<!-- sniffing -->
+<template v-if="inbound.canSniffing()">
+    {{template "form/sniffing"}}
+</template>
+{{end}}

web/html/xui/form/protocol/dokodemo.html

@@ -0,0 +1,17 @@
+{{define "form/dokodemo"}}
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "pages.inbounds.targetAddress"}}'>
+        <a-input v-model.trim="inbound.settings.address"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.destinationPort"}}'>
+        <a-input type="number" v-model.number="inbound.settings.port"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.network"}}'>
+        <a-select v-model="inbound.settings.network" style="width: 100px;">
+            <a-select-option value="tcp,udp">tcp+udp</a-select-option>
+            <a-select-option value="tcp">tcp</a-select-option>
+            <a-select-option value="udp">udp</a-select-option>
+        </a-select>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/protocol/http.html

@@ -0,0 +1,10 @@
+{{define "form/http"}}
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "username"}}'>
+        <a-input v-model.trim="inbound.settings.accounts[0].user"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "password" }}'>
+        <a-input v-model.trim="inbound.settings.accounts[0].pass"></a-input>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/protocol/shadowsocks.html

@@ -0,0 +1,19 @@
+{{define "form/shadowsocks"}}
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "encryption" }}'>
+        <a-select v-model="inbound.settings.method" style="width: 165px;">
+            <a-select-option v-for="method in SSMethods" :value="method">[[ method ]]</a-select-option>
+        </a-select>
+    </a-form-item>
+    <a-form-item label='{{ i18n "password" }}'>
+        <a-input v-model.trim="inbound.settings.password"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.network" }}'>
+        <a-select v-model="inbound.settings.network" style="width: 100px;">
+            <a-select-option value="tcp,udp">tcp+udp</a-select-option>
+            <a-select-option value="tcp">tcp</a-select-option>
+            <a-select-option value="udp">udp</a-select-option>
+        </a-select>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/protocol/socks.html

@@ -0,0 +1,24 @@
+{{define "form/socks"}}
+<a-form layout="inline">
+<!--    <a-form-item label="密码认证">-->
+    <a-form-item label='{{ i18n "password" }}'>
+        <a-switch :checked="inbound.settings.auth === 'password'"
+                  @change="checked => inbound.settings.auth = checked ? 'password' : 'noauth'"></a-switch>
+    </a-form-item>
+    <template v-if="inbound.settings.auth === 'password'">
+        <a-form-item label='{{ i18n "username" }}'>
+            <a-input v-model.trim="inbound.settings.accounts[0].user"></a-input>
+        </a-form-item>
+        <a-form-item label='{{ i18n "password" }}'>
+            <a-input v-model.trim="inbound.settings.accounts[0].pass"></a-input>
+        </a-form-item>
+    </template>
+    <a-form-item label='{{ i18n "pages.inbounds.enable" }} udp'>
+        <a-switch v-model="inbound.settings.udp"></a-switch>
+    </a-form-item>
+    <a-form-item v-if="inbound.settings.udp"
+                 label="IP">
+        <a-input v-model.trim="inbound.settings.ip"></a-input>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/protocol/trojan.html

@@ -0,0 +1,141 @@
+{{define "form/trojan"}}
+<a-form layout="inline">
+<a-collapse activeKey="0"  v-for="(trojan, index) in inbound.settings.trojans"
+:key="`trojan-${index}`">
+
+
+<a-collapse-panel :class="getHeaderStyle(trojan.email)" :header="getHeaderText(trojan.email)">
+    <a-tag v-if="isExpiry(index) || ((getUpStats(trojan.email) + getDownStats(trojan.email)) > trojan.totalGB && trojan.totalGB != 0)" color="red" style="margin-bottom: 10px;display: block;text-align: center;">Account is (Expired|Traffic Ended) And Disabled</a-tag>
+    <a-form layout="inline">
+        <a-form-item>
+            <span slot="label">
+                Email
+                <a-tooltip>
+                    <template slot="title">
+                        The email must be completely unique
+                    </template>
+                    <!--Renew Svg Icon-->
+                    <svg 
+                        @click="getNewEmail(trojan)"
+                        xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="anticon anticon-question-circle" viewBox="0 0 16 16"> <path d="M11.534 7h3.932a.25.25 0 0 1 .192.41l-1.966 2.36a.25.25 0 0 1-.384 0l-1.966-2.36a.25.25 0 0 1 .192-.41zm-11 2h3.932a.25.25 0 0 0 .192-.41L2.692 6.23a.25.25 0 0 0-.384 0L.342 8.59A.25.25 0 0 0 .534 9z"/> <path fill-rule="evenodd" d="M8 3c-1.552 0-2.94.707-3.857 1.818a.5.5 0 1 1-.771-.636A6.002 6.002 0 0 1 13.917 7H12.9A5.002 5.002 0 0 0 8 3zM3.1 9a5.002 5.002 0 0 0 8.757 2.182.5.5 0 1 1 .771.636A6.002 6.002 0 0 1 2.083 9H3.1z"/> </svg>
+                </a-tooltip>
+            </span>
+            <a-input v-model.trim="trojan.email"></a-input>
+        </a-form-item>
+    </a-form>
+    <a-form-item label="password">
+        <a-input v-model.trim="trojan.password"></a-input>
+    </a-form-item>
+        <a-form-item v-if="inbound.xtls" label="flow">
+            <a-select v-model="inbound.settings.trojans[index].flow" style="width: 150px">
+                <a-select-option value="" selected>none</a-select-option>
+                <a-select-option v-for="key in XTLS_FLOW_CONTROL" :value="key">[[ key ]]</a-select-option>
+            </a-select>
+        </a-form-item>
+    <a-form-item>
+        <span slot="label">
+            <span >{{ i18n "pages.inbounds.totalFlow" }}</span>(GB)
+            <a-tooltip>
+                <template slot="title">
+                    0 <span>{{ i18n "pages.inbounds.meansNoLimit" }}</span>
+                </template>
+                <a-icon type="question-circle" theme="filled"></a-icon>
+            </a-tooltip>
+        </span>
+        <a-input-number v-model="trojan._totalGB" :min="0"></a-input-number>
+    </a-form-item>
+    <a-form-item>
+        <span slot="label">
+            <span >{{ i18n "pages.inbounds.expireDate" }}</span>
+            <a-tooltip>
+                <template slot="title">
+                    <span>{{ i18n "pages.inbounds.leaveBlankToNeverExpire" }}</span>
+                </template>
+                <a-icon type="question-circle" theme="filled"></a-icon>
+            </a-tooltip>
+        </span>
+        <a-date-picker :show-time="{ format: 'HH:mm' }" format="YYYY-MM-DD HH:mm"
+                       v-model="trojan._expiryTime" style="width: 300px;"></a-date-picker>
+    </a-form-item>
+    <a-form layout="inline">
+        <a-tooltip v-if="trojan._totalGB > 0">
+            <template slot="title">
+                reset traffic
+            </template>
+            <span style="color: #FF4D4F">
+                <a-icon type="delete" @click="resetClientTraffic(trojan,$event)"></a-icon>
+            </span>
+        </a-tooltip>
+        <a-tag color="blue">[[ sizeFormat(getUpStats(trojan.email)) ]] / [[ sizeFormat(getDownStats(trojan.email)) ]]</a-tag>
+        <a-tag v-if="trojan._totalGB > 0" color="red">used : [[ sizeFormat(getUpStats(trojan.email) + getDownStats(trojan.email)) ]]</a-tag>
+        <a-tag>
+            <svg
+                @click="addClient(inbound.protocol,trojan, inbound.settings.trojans)"
+                xmlns="http://www.w3.org/2000/svg"
+                viewBox="0 0 24 24"
+                width="24"
+                height="24"
+                class="ml-2 cursor-pointer"
+                >
+                <path fill="none" d="M0 0h24v24H0z" />
+                <path
+                fill="green"
+                d="M11 11V7h2v4h4v2h-4v4h-2v-4H7v-2h4zm1 11C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16z"
+                />
+            </svg>
+        </a-tag>
+        <a-tag v-show="inbound.settings.trojans.length > 1">
+            <svg
+                v-show="inbound.settings.trojans.length > 1"
+                @click="removeClient(index, inbound.settings.trojans)"
+                xmlns="http://www.w3.org/2000/svg"
+                viewBox="0 0 24 24"
+                width="24"
+                height="24"
+                class="ml-2 cursor-pointer"
+                >
+                <path fill="none" d="M0 0h24v24H0z" />
+                <path
+                fill="#EC4899"
+                d="M12 22C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16zm0-9.414l2.828-2.829 1.415 1.415L13.414 12l2.829 2.828-1.415 1.415L12 13.414l-2.828 2.829-1.415-1.415L10.586 12 7.757 9.172l1.415-1.415L12 10.586z"
+                />
+            </svg>
+        </a-tag>
+       </a-form>
+    </a-form>
+<a-form layout="inline">
+    <a-form-item label="fallbacks">
+         <a-row>
+              <a-button type="primary" size="small"
+                  @click="inbound.settings.addTrojanFallback()">
+            +
+              </a-button>
+        </a-row>
+    </a-form-item>
+</a-form>
+
+<!-- trojan fallbacks -->
+<a-form v-for="(fallback, index) in inbound.settings.fallbacks" layout="inline">
+<a-divider>
+    fallback[[ index + 1 ]]
+    <a-icon type="delete" @click="() => inbound.settings.delTrojanFallback(index)"
+            style="color: rgb(255, 77, 79);cursor: pointer;"/>
+</a-divider>
+<a-form-item label="name">
+    <a-input v-model="fallback.name"></a-input>
+</a-form-item>
+<a-form-item label="alpn">
+    <a-input v-model="fallback.alpn"></a-input>
+</a-form-item>
+<a-form-item label="path">
+    <a-input v-model="fallback.path"></a-input>
+</a-form-item>
+<a-form-item label="dest">
+    <a-input v-model="fallback.dest"></a-input>
+</a-form-item>
+<a-form-item label="xver">
+    <a-input type="number" v-model.number="fallback.xver"></a-input>
+</a-form-item>
+<a-divider v-if="inbound.settings.fallbacks.length - 1 === index"/>
+</a-form>
+{{end}}

web/html/xui/form/protocol/vless.html

@@ -0,0 +1,155 @@
+{{define "form/vless"}}
+<a-form layout="inline">
+<a-collapse activeKey="0" v-for="(vless, index) in inbound.settings.vlesses"
+:key="`vless-${index}`">
+
+    <a-collapse-panel :class="getHeaderStyle(vless.email)" :header="getHeaderText(vless.email)">
+        <a-tag v-if="isExpiry(index) || ((getUpStats(vless.email) + getDownStats(vless.email)) > vless.totalGB && vless.totalGB != 0)" color="red" style="margin-bottom: 10px;display: block;text-align: center;">Account is (Expired|Traffic Ended) And Disabled</a-tag>
+
+        <a-form layout="inline">
+            <a-form-item>
+                <span slot="label">
+                    Email
+                    <a-tooltip>
+                        <template slot="title">
+                            The email must be completely unique
+                        </template>
+                        <!--Renew Svg Icon-->
+                        <svg 
+                            @click="getNewEmail(vless)"
+                            xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="anticon anticon-question-circle" viewBox="0 0 16 16"> <path d="M11.534 7h3.932a.25.25 0 0 1 .192.41l-1.966 2.36a.25.25 0 0 1-.384 0l-1.966-2.36a.25.25 0 0 1 .192-.41zm-11 2h3.932a.25.25 0 0 0 .192-.41L2.692 6.23a.25.25 0 0 0-.384 0L.342 8.59A.25.25 0 0 0 .534 9z"/> <path fill-rule="evenodd" d="M8 3c-1.552 0-2.94.707-3.857 1.818a.5.5 0 1 1-.771-.636A6.002 6.002 0 0 1 13.917 7H12.9A5.002 5.002 0 0 0 8 3zM3.1 9a5.002 5.002 0 0 0 8.757 2.182.5.5 0 1 1 .771.636A6.002 6.002 0 0 1 2.083 9H3.1z"/> </svg>
+                    </a-tooltip>
+                </span>
+                <a-input v-model.trim="vless.email"></a-input>
+            </a-form-item>
+        </a-form>
+        <a-form-item label="id">
+            <a-input v-model.trim="vless.id"></a-input>
+        </a-form-item>
+		<a-form-item v-if="inbound.xtls" label="flow">
+            <a-select v-model="inbound.settings.vlesses[index].flow" style="width: 150px">
+                <a-select-option value="" selected>none</a-select-option>
+                <a-select-option v-for="key in XTLS_FLOW_CONTROL" :value="key">[[ key ]]</a-select-option>
+            </a-select>
+        </a-form-item>
+        <a-form-item v-else-if="inbound.canEnableTlsFlow()" label="flow" layout="inline">
+            <a-select v-model="inbound.settings.vlesses[index].flow" style="width: 150px">
+                <a-select-option value="" selected>none</a-select-option>
+                <a-select-option v-for="key in TLS_FLOW_CONTROL" :value="key">[[ key ]]</a-select-option>
+            </a-select>
+        </a-form-item>
+        <a-form-item v-if="inbound.tls" label="utls" layout="inline">
+                <a-select v-model="inbound.settings.vlesses[index].fingerprint" label="utls" style="width: 150px">
+                    <a-select-option v-for="key in UTLS_FINGERPRINT" :value="key">[[ key ]]</a-select-option>
+                </a-select>
+        </a-form-item>
+        <a-form-item>
+            <span slot="label">
+                <span >{{ i18n "pages.inbounds.totalFlow" }}</span>(GB)
+                <a-tooltip>
+                    <template slot="title">
+                        0 <span>{{ i18n "pages.inbounds.meansNoLimit" }}</span>
+                    </template>
+                    <a-icon type="question-circle" theme="filled"></a-icon>
+                </a-tooltip>
+            </span>
+            <a-input-number v-model="vless._totalGB" :min="0"></a-input-number>
+        </a-form-item>
+        <a-form-item>
+            <span slot="label">
+                <span >{{ i18n "pages.inbounds.expireDate" }}</span>
+                <a-tooltip>
+                    <template slot="title">
+                        <span>{{ i18n "pages.inbounds.leaveBlankToNeverExpire" }}</span>
+                    </template>
+                    <a-icon type="question-circle" theme="filled"></a-icon>
+                </a-tooltip>
+            </span>
+            <a-date-picker :show-time="{ format: 'HH:mm' }" format="YYYY-MM-DD HH:mm"
+                           v-model="vless._expiryTime" style="width: 300px;"></a-date-picker>
+        </a-form-item>
+        <a-form layout="inline">
+            <a-tooltip v-if="vless._totalGB > 0">
+                <template slot="title">
+                    reset traffic
+                </template>
+                <span style="color: #FF4D4F">
+                    <a-icon type="delete" @click="resetClientTraffic(vless,$event)"></a-icon>
+                </span>
+            </a-tooltip>
+            <a-tag color="blue">[[ sizeFormat(getUpStats(vless.email)) ]] / [[ sizeFormat(getDownStats(vless.email)) ]]</a-tag>
+            <a-tag v-if="vless._totalGB > 0" color="red">used : [[ sizeFormat(getUpStats(vless.email) + getDownStats(vless.email)) ]]</a-tag>
+            <a-tag>
+                <svg
+    
+                    @click="addClient(inbound.protocol,vless, inbound.settings.vlesses)"
+                    xmlns="http://www.w3.org/2000/svg"
+                    viewBox="0 0 22 22"
+                    width="22"
+                    height="22"
+                    class="mt-2 cursor-pointer"
+                    >
+                    <path fill="none" d="M0 0h24v24H0z" />
+                    <path
+                    fill="green"
+                    d="M11 11V7h2v4h4v2h-4v4h-2v-4H7v-2h4zm1 11C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16z"
+                    />
+                </svg>
+            </a-tag>
+            <a-tag v-show="inbound.settings.vlesses.length > 1">
+                <svg
+                @click="removeClient(index, inbound.settings.vlesses)"
+                xmlns="http://www.w3.org/2000/svg"
+                viewBox="0 0 22 22"
+                width="22"
+                height="22"
+                class="mt-2 cursor-pointer"
+                >
+                <path fill="none" d="M0 0h24v24H0z" />
+                <path
+                fill="#EC4899"
+                d="M12 22C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16zm0-9.414l2.828-2.829 1.415 1.415L13.414 12l2.829 2.828-1.415 1.415L12 13.414l-2.828 2.829-1.415-1.415L10.586 12 7.757 9.172l1.415-1.415L12 10.586z"
+                />
+                </svg>
+            </a-tag>
+        </a-form>
+
+
+    </a-form>
+
+<a-form layout="inline">
+    <a-form-item label="fallbacks">
+        <a-row>
+            <a-button type="primary" size="small"
+                      @click="inbound.settings.addFallback()">
+                +
+            </a-button>
+        </a-row>
+    </a-form-item>
+</a-form>
+
+<!-- vless fallbacks -->
+<a-form v-for="(fallback, index) in inbound.settings.fallbacks" layout="inline">
+    <a-divider>
+        fallback[[ index + 1 ]]
+        <a-icon type="delete" @click="() => inbound.settings.delFallback(index)"
+                style="color: rgb(255, 77, 79);cursor: pointer;"/>
+    </a-divider>
+    <a-form-item label="name">
+        <a-input v-model="fallback.name"></a-input>
+    </a-form-item>
+    <a-form-item label="alpn">
+        <a-input v-model="fallback.alpn"></a-input>
+    </a-form-item>
+    <a-form-item label="path">
+        <a-input v-model="fallback.path"></a-input>
+    </a-form-item>
+    <a-form-item label="dest">
+        <a-input v-model="fallback.dest"></a-input>
+    </a-form-item>
+    <a-form-item label="xver">
+        <a-input type="number" v-model.number="fallback.xver"></a-input>
+    </a-form-item>
+    <a-divider v-if="inbound.settings.fallbacks.length - 1 === index"/>
+</a-form>
+{{end}}

web/html/xui/form/protocol/vmess.html

@@ -0,0 +1,119 @@
+{{define "form/vmess"}}
+<a-form layout="inline">
+<a-collapse activeKey="0"  v-for="(vmess, index) in inbound.settings.vmesses"
+:key="`vmess-${index}`">
+    <a-collapse-panel :class="getHeaderStyle(vmess.email)" :header="getHeaderText(vmess.email)">
+        <a-tag v-if="isExpiry(index) || ((getUpStats(vmess.email) + getDownStats(vmess.email)) > vmess.totalGB && vmess.totalGB != 0)" color="red" style="margin-bottom: 10px;display: block;text-align: center;">Account is (Expired|Traffic Ended) And Disabled</a-tag>
+
+        <a-form layout="inline">
+            <a-form-item>
+                <span slot="label">
+                    Email
+                    <a-tooltip>
+                        <template slot="title">
+                            The email must be completely unique
+                        </template>
+                        <!--Renew Svg Icon-->
+                        <svg 
+                            @click="getNewEmail(vmess)"
+                            xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="anticon anticon-question-circle" viewBox="0 0 16 16"> <path d="M11.534 7h3.932a.25.25 0 0 1 .192.41l-1.966 2.36a.25.25 0 0 1-.384 0l-1.966-2.36a.25.25 0 0 1 .192-.41zm-11 2h3.932a.25.25 0 0 0 .192-.41L2.692 6.23a.25.25 0 0 0-.384 0L.342 8.59A.25.25 0 0 0 .534 9z"/> <path fill-rule="evenodd" d="M8 3c-1.552 0-2.94.707-3.857 1.818a.5.5 0 1 1-.771-.636A6.002 6.002 0 0 1 13.917 7H12.9A5.002 5.002 0 0 0 8 3zM3.1 9a5.002 5.002 0 0 0 8.757 2.182.5.5 0 1 1 .771.636A6.002 6.002 0 0 1 2.083 9H3.1z"/> </svg>
+                    </a-tooltip>
+                </span>
+                <a-input v-model.trim="vmess.email"></a-input>
+            </a-form-item>
+        </a-form>
+        <a-form-item label="id">
+            <a-input v-model.trim="vmess.id"></a-input>
+        </a-form-item>
+        <a-form-item label='{{ i18n "additional" }} ID'>
+            <a-input type="number" v-model.number="vmess.alterId"></a-input>
+        </a-form-item>
+        <a-form-item>
+            <span slot="label">
+                <span >{{ i18n "pages.inbounds.totalFlow" }}</span>(GB)
+                <a-tooltip>
+                    <template slot="title">
+                        0 <span>{{ i18n "pages.inbounds.meansNoLimit" }}</span>
+                    </template>
+                    <a-icon type="question-circle" theme="filled"></a-icon>
+                </a-tooltip>
+            </span>
+            <a-input-number v-model="vmess._totalGB" :min="0"></a-input-number>
+        </a-form-item>
+        <a-form-item>
+            <span slot="label">
+                <span >{{ i18n "pages.inbounds.expireDate" }}</span>
+                <a-tooltip>
+                    <template slot="title">
+                        <span>{{ i18n "pages.inbounds.leaveBlankToNeverExpire" }}</span>
+                    </template>
+                    <a-icon type="question-circle" theme="filled"></a-icon>
+                </a-tooltip>
+            </span>
+            <a-date-picker :show-time="{ format: 'HH:mm' }" format="YYYY-MM-DD HH:mm"
+                           v-model="vmess._expiryTime" style="width: 300px;"></a-date-picker>
+        </a-form-item>
+        <a-form layout="inline">
+            <a-tooltip v-if="vmess._totalGB > 0">
+                <template slot="title">
+                    reset traffic
+                </template>
+                <span style="color: #FF4D4F">
+                    <a-icon type="delete" @click="resetClientTraffic(vmess,$event)"></a-icon>
+                </span>
+            </a-tooltip>
+            <a-tag color="blue">[[ sizeFormat(getUpStats(vmess.email)) ]] / [[ sizeFormat(getDownStats(vmess.email)) ]]</a-tag>
+            <a-tag v-if="vmess._totalGB > 0" color="red">used : [[ sizeFormat(getUpStats(vmess.email) + getDownStats(vmess.email)) ]]</a-tag>
+            <a-tag>
+                <!--Add Svg Icon-->
+                <svg
+    
+                    @click="addClient(inbound.protocol,vmess, inbound.settings.vmesses)"
+                    xmlns="http://www.w3.org/2000/svg"
+                    viewBox="0 0 22 22"
+                    width="22"
+                    height="22"
+                    class="mt-2 cursor-pointer"
+                    >
+                    <path fill="none" d="M0 0h24v24H0z" />
+                    <path
+                    fill="green"
+                    d="M11 11V7h2v4h4v2h-4v4h-2v-4H7v-2h4zm1 11C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16z"
+                    />
+                </svg>
+            </a-tag>
+            <a-tag v-show="inbound.settings.vmesses.length > 1">
+
+                <!--Remove Svg Icon-->
+                <svg
+                    @click="removeClient(index, inbound.settings.vmesses)"
+                    xmlns="http://www.w3.org/2000/svg"
+                    viewBox="0 0 22 22"
+                    width="22"
+                    height="22"
+                    class="mt-2 cursor-pointer"
+                    >
+                    <path fill="none" d="M0 0h24v24H0z" />
+                    <path
+                    fill="#EC4899"
+                    d="M12 22C6.477 22 2 17.523 2 12S6.477 2 12 2s10 4.477 10 10-4.477 10-10 10zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16zm0-9.414l2.828-2.829 1.415 1.415L13.414 12l2.829 2.828-1.415 1.415L12 13.414l-2.828 2.829-1.415-1.415L10.586 12 7.757 9.172l1.415-1.415L12 10.586z"
+                    />
+                </svg>
+        </a-tag>
+    </a-form>
+
+
+</a-collapse-panel>
+
+</a-collapse>
+
+
+</a-form>
+</a-form>
+<a-form layout="inline">
+<a-form-item label='{{ i18n "pages.inbounds.disableInsecureEncryption" }}'>
+    <a-switch v-model.number="inbound.settings.disableInsecure"></a-switch>
+</a-form-item>
+</a-form>
+
+{{end}}

web/html/xui/form/sniffing.html

@@ -0,0 +1,16 @@
+{{define "form/sniffing"}}
+<a-form layout="inline">
+  <a-form-item>
+            <span slot="label">
+                sniffing
+                <a-tooltip>
+                    <template slot="title">
+                        <span >{{ i18n "pages.inbounds.noRecommendKeepDefault" }}</span>
+                    </template>
+                    <a-icon type="question-circle" theme="filled"></a-icon>
+                </a-tooltip>
+            </span>
+    <a-switch v-model="inbound.sniffing.enabled"></a-switch>
+  </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/stream/stream_grpc.html

@@ -0,0 +1,7 @@
+{{define "form/streamGRPC"}}
+<a-form layout="inline">
+    <a-form-item label="serviceName">
+        <a-input v-model.trim="inbound.stream.grpc.serviceName"></a-input>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/stream/stream_http.html

@@ -0,0 +1,12 @@
+{{define "form/streamHTTP"}}
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "path" }}'>
+        <a-input v-model.trim="inbound.stream.http.path"></a-input>
+    </a-form-item>
+    <a-form-item label="host">
+        <a-row v-for="(host, index) in inbound.stream.http.host">
+            <a-input v-model.trim="inbound.stream.http.host[index]"></a-input>
+        </a-row>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/stream/stream_kcp.html

@@ -0,0 +1,38 @@
+{{define "form/streamKCP"}}
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "camouflage" }}'>
+        <a-select v-model="inbound.stream.kcp.type" style="width: 280px;">
+            <a-select-option value="none">none（not camouflage）</a-select-option>
+            <a-select-option value="srtp">srtp（camouflage video call）</a-select-option>
+            <a-select-option value="utp">utp（camouflage BT download）</a-select-option>
+            <a-select-option value="wechat-video">wechat-video（camouflage WeChat video）</a-select-option>
+            <a-select-option value="dtls">dtls（camouflage DTLS 1.2 packages）</a-select-option>
+            <a-select-option value="wireguard">wireguard（camouflage wireguard packages）</a-select-option>
+        </a-select>
+    </a-form-item>
+    <a-form-item label='{{ i18n "password" }}'>
+        <a-input v-model.number="inbound.stream.kcp.seed"></a-input>
+    </a-form-item>
+    <a-form-item label="mtu">
+        <a-input type="number" v-model.number="inbound.stream.kcp.mtu"></a-input>
+    </a-form-item>
+    <a-form-item label="tti (ms)">
+        <a-input type="number" v-model.number="inbound.stream.kcp.tti"></a-input>
+    </a-form-item>
+    <a-form-item label="uplink capacity (MB/S)">
+        <a-input type="number" v-model.number="inbound.stream.kcp.upCap"></a-input>
+    </a-form-item>
+    <a-form-item label="downlink capacity (MB/S)">
+        <a-input type="number" v-model.number="inbound.stream.kcp.downCap"></a-input>
+    </a-form-item>
+    <a-form-item label="congestion">
+        <a-switch v-model="inbound.stream.kcp.congestion"></a-switch>
+    </a-form-item>
+    <a-form-item label="read buffer size (MB)">
+        <a-input type="number" v-model.number="inbound.stream.kcp.readBuffer"></a-input>
+    </a-form-item>
+    <a-form-item label="write buffer size (MB)">
+        <a-input type="number" v-model.number="inbound.stream.kcp.writeBuffer"></a-input>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/stream/stream_quic.html

@@ -0,0 +1,24 @@
+{{define "form/streamQUIC"}}
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "pages.inbounds.stream.quic.encryption" }}'>
+        <a-select v-model="inbound.stream.quic.security" style="width: 165px;">
+            <a-select-option value="none">none</a-select-option>
+            <a-select-option value="aes-128-gcm">aes-128-gcm</a-select-option>
+            <a-select-option value="chacha20-poly1305">chacha20-poly1305</a-select-option>
+        </a-select>
+    </a-form-item>
+    <a-form-item label='{{ i18n "password" }}'>
+        <a-input v-model.trim="inbound.stream.quic.key"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "camouflage" }}'>
+        <a-select v-model="inbound.stream.quic.type" style="width: 280px;">
+            <a-select-option value="none">none（not camouflage）</a-select-option>
+            <a-select-option value="srtp">srtp（camouflage video call）</a-select-option>
+            <a-select-option value="utp">utp（camouflage BT download）</a-select-option>
+            <a-select-option value="wechat-video">wechat-video（camouflage WeChat video）</a-select-option>
+            <a-select-option value="dtls">dtls（camouflage DTLS 1.2 packages）</a-select-option>
+            <a-select-option value="wireguard">wireguard（camouflage wireguard packages）</a-select-option>
+        </a-select>
+    </a-form-item>
+</a-form>
+{{end}}

web/html/xui/form/stream/stream_settings.html

@@ -0,0 +1,45 @@
+{{define "form/streamSettings"}}
+<!-- select stream network -->
+<a-form layout="inline">
+    <a-form-item label='{{ i18n "transmission" }}'>
+        <a-select v-model="inbound.stream.network" @change="streamNetworkChange">
+            <a-select-option value="tcp">tcp</a-select-option>
+            <a-select-option value="kcp">kcp</a-select-option>
+            <a-select-option value="ws">ws</a-select-option>
+            <a-select-option value="http">http</a-select-option>
+            <a-select-option value="quic">quic</a-select-option>
+            <a-select-option value="grpc">grpc</a-select-option>
+        </a-select>
+    </a-form-item>
+</a-form>
+
+<!-- tcp -->
+<template v-if="inbound.stream.network === 'tcp'">
+    {{template "form/streamTCP"}}
+</template>
+
+<!-- kcp -->
+<template v-if="inbound.stream.network === 'kcp'">
+    {{template "form/streamKCP"}}
+</template>
+
+<!-- ws -->
+<template v-if="inbound.stream.network === 'ws'">
+    {{template "form/streamWS"}}
+</template>
+
+<!-- http -->
+<template v-if="inbound.stream.network === 'http'">
+    {{template "form/streamHTTP"}}
+</template>
+
+<!-- quic -->
+<template v-if="inbound.stream.network === 'quic'">
+    {{template "form/streamQUIC"}}
+</template>
+
+<!-- grpc -->
+<template v-if="inbound.stream.network === 'grpc'">
+    {{template "form/streamGRPC"}}
+</template>
+{{end}}

web/html/xui/form/stream/stream_tcp.html

@@ -0,0 +1,86 @@
+{{define "form/streamTCP"}}
+<!-- tcp type -->
+<a-form layout="inline">
+    <a-form-item label="acceptProxyProtocol">
+        <a-switch v-model="inbound.stream.tcp.acceptProxyProtocol"></a-switch>
+    </a-form-item>
+    <a-form-item label="http camouflage">
+        <a-switch
+                :checked="inbound.stream.tcp.type === 'http'"
+                @change="checked => inbound.stream.tcp.type = checked ? 'http' : 'none'">
+        </a-switch>
+    </a-form-item>
+</a-form>
+
+<!-- tcp request -->
+<a-form v-if="inbound.stream.tcp.type === 'http'"
+        layout="inline">
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.requestVersion" }}'>
+        <a-input v-model.trim="inbound.stream.tcp.request.version"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.requestMethod" }}'>
+        <a-input v-model.trim="inbound.stream.tcp.request.method"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.requestPath" }}'>
+        <a-row v-for="(path, index) in inbound.stream.tcp.request.path">
+            <a-input v-model.trim="inbound.stream.tcp.request.path[index]"></a-input>
+        </a-row>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.stream.general.requestHeader" }}'>
+        <a-row>
+            <a-button size="small"
+                      @click="inbound.stream.tcp.request.addHeader('Host', 'xxx.com')">
+                +
+            </a-button>
+        </a-row>
+        <a-input-group v-for="(header, index) in inbound.stream.tcp.request.headers">
+            <a-input style="width: 50%" v-model.trim="header.name"
+                     addon-before='{{ i18n "pages.inbounds.stream.general.name" }}'></a-input>
+            <a-input style="width: 50%" v-model.trim="header.value"
+                     addon-before='{{ i18n "pages.inbounds.stream.general.value" }}'>
+                <template slot="addonAfter">
+                    <a-button size="small"
+                              @click="inbound.stream.tcp.request.removeHeader(index)">
+                        -
+                    </a-button>
+                </template>
+            </a-input>
+        </a-input-group>
+    </a-form-item>
+</a-form>
+
+<!-- tcp response -->
+<a-form v-if="inbound.stream.tcp.type === 'http'"
+        layout="inline">
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.responseVersion" }}'>
+        <a-input v-model.trim="inbound.stream.tcp.response.version"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.responseStatus" }}'>
+        <a-input v-model.trim="inbound.stream.tcp.response.status"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.responseStatusDescription" }}'>
+        <a-input v-model.trim="inbound.stream.tcp.response.reason"></a-input>
+    </a-form-item>
+    <a-form-item label='{{ i18n "pages.inbounds.stream.tcp.responseHeader" }}'>
+        <a-row>
+            <a-button size="small"
+                      @click="inbound.stream.tcp.response.addHeader('Content-Type', 'application/octet-stream')">
+                +
+            </a-button>
+        </a-row>
+        <a-input-group v-for="(header, index) in inbound.stream.tcp.response.headers">
+            <a-input style="width: 50%" v-model.trim="header.name"
+                     addon-before='{{ i18n "pages.inbounds.stream.general.name" }}'></a-input>
+            <a-input style="width: 50%" v-model.trim="header.value"
+                     addon-before='{{ i18n "pages.inbounds.stream.general.value" }}'>
+                <template slot="addonAfter">
+                    <a-button size="small"
+                              @click="inbound.stream.tcp.response.removeHeader(index)">
+                        -
+                    </a-button>
+                </template>
+            </a-input>
+        </a-input-group>
+    </a-form-item>
+</a-form>
+{{end}}