diff --git a/README.md b/README.md
index c70ed7b..e50205d 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # VueSpaNONODE
-This is a single-page application that uses Vue and Vue Router. It uses ES6 imports to render components and templates. No Node is required. Just git clone and serve statically. 
+This is a single-page application that uses Vue 3 and Vue Router. It uses ES6 imports to render components and templates. No Node is required. Just git clone and serve statically. 
 
 You can also select "Use this Template" in order to create a new single-page application that you can build upon. You can write code in any environment that has a static web-server. There are no dependencies.
 
diff --git a/components/about.js b/components/about.js
index 0e6a711..39cb46e 100644
--- a/components/about.js
+++ b/components/about.js
@@ -1,8 +1,6 @@
-import { AboutTemplate } from "../templates/about-template.js";
-
-
-const About = {
-    template: AboutTemplate,
-}
-
-export { About }
\ No newline at end of file
+export default {
+    setup() {},
+    template: `<h1>This is About</h1>`
+    // Can also target an in-DOM template:
+    // template: '#my-template-element'
+}
\ No newline at end of file
diff --git a/components/home.js b/components/home.js
new file mode 100644
index 0000000..128ab14
--- /dev/null
+++ b/components/home.js
@@ -0,0 +1,6 @@
+export default {
+    template: `
+      <h1>This is Home</h1>`
+    // Can also target an in-DOM template:
+    // template: '#my-template-element'
+}
\ No newline at end of file
diff --git a/index.html b/index.html
index 91359eb..156dd17 100644
--- a/index.html
+++ b/index.html
@@ -3,7 +3,7 @@
 <html lang="en">
 
 <head>
-    <title>Vue SPA</title>
+    <title>Vue SPA No Node</title>
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
     <style>
         ul {
@@ -40,9 +40,23 @@
 
 <body>
 
-    <div id="app"></div>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/vue-router/3.0.2/vue-router.js"></script>
+    <div id="app">
+       
+    </div>
+    <!-- <script type="importmap">
+        {
+          "imports": {
+            "Vue": "https://cdnjs.cloudflare.com/ajax/libs/vue/3.5.12/vue.esm-browser.min.js"
+          }
+        }
+    </script> -->
+    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
+    <script src="https://unpkg.com/vue-router@4.4.5/dist/vue-router.global.js"></script>
     <script type="module" src="main.js"></script>
 </body>
 
-</html>
\ No newline at end of file
+</html>
+            <!-- "@vue/devtools-api": "https://unpkg.com/@vue/devtools-api@7.4.6/dist/index.js",
+            "@vue/devtools-kit": "https://unpkg.com/@vue/devtools-kit@7.4.6/dist/index.js",
+            "@vue/devtools-shared": "https://unpkg.com/@vue/devtools-shared@7.4.6/dist/index.js",
+            "perfect-debounce": "./perfect-debounce.js", -->
\ No newline at end of file
diff --git a/main.js b/main.js
index a074063..bf550ac 100644
--- a/main.js
+++ b/main.js
@@ -1,30 +1,44 @@
-import Vue from 'https://cdn.jsdelivr.net/npm/vue@latest/dist/vue.esm.browser.min.js'
+const { createApp, ref } = Vue
+const { createRouter, createMemoryHistory, RouterLink, RouterView } = VueRouter
 
-import {
-    Navbar
-} from './components/navbar.js'
+import Home from './components/home.js'
 
-import {
-    MainTemplate
-} from './templates/main-template.js'
+import About from './components/about.js'
 
-import { About } from './components/about.js'
+const routes = [
+  { path: '/', component: Home },
+  { path: '/about', component: About },
+]
 
-Vue.use(VueRouter)
-
-const router = new VueRouter({
-  routes: [{
-    path: '/about',
-    component: About,
-    name: "About Us Page"
-  }]
+const router = createRouter({
+  history: createMemoryHistory(),
+  routes,
 })
 
-new Vue({
-    el: '#app', // This should be the same as your <div id=""> from earlier.
-    components: {
-        'navbar': Navbar
-    },
-    router,
-    template: MainTemplate
+createApp({
+  setup() {
+    return {
+      count: ref(0)
+    }
+  },
+  components: {
+    Home,
+    RouterLink,
+    RouterView
+  },
+  template: `
+   <h1>Hello Vue No Node!</h1>
+        <p>
+            <strong>Current route path:</strong> {{ $route.fullPath }}
+        </p>
+        <nav>
+            <RouterLink to="/">Go to Home</RouterLink>
+            <RouterLink to="/about">Go to About</RouterLink>
+        </nav>
+        <main>
+            <RouterView />
+        </main>
+  `
 })
+.use(router)
+.mount('#app')
diff --git a/templates/about-template.js b/templates/about-template.js
deleted file mode 100644
index d7e5585..0000000
--- a/templates/about-template.js
+++ /dev/null
@@ -1,3 +0,0 @@
-const AboutTemplate = `<h1>About Template</h1>`
-
-export { AboutTemplate }
\ No newline at end of file
diff --git a/templates/main-template.js b/templates/main-template.js
deleted file mode 100644
index 68a978a..0000000
--- a/templates/main-template.js
+++ /dev/null
@@ -1,12 +0,0 @@
-// Note that these are backticks.
-
-const MainTemplate = `
-    <div>
-    <navbar></navbar>
-    All content will appear below the horizontal line.
-    <hr>
-    <router-view></router-view>
-    </div>
-`
-
-export { MainTemplate }
\ No newline at end of file
diff --git a/templates/navbar-template.js b/templates/navbar-template.js
deleted file mode 100644
index 2415da2..0000000
--- a/templates/navbar-template.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const NavbarTemplate = `<nav>
-
-<ul>
-  <li><a class="active" href="#/">Home</a></li>
-  <li><a href="#/about">About</a></li>
-</ul>
-
-</nav>`
-
-export { NavbarTemplate }
\ No newline at end of file
diff --git a/vue.js b/vue.js
deleted file mode 100644
index 9920a44..0000000
--- a/vue.js
+++ /dev/null
@@ -1,11904 +0,0 @@
-/*!
- * Vue.js v2.6.6
- * (c) 2014-2019 Evan You
- * Released under the MIT License.
- */
-/*  */
-
-const 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].
- */
-const _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) {
-  const 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) {
-  const 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
-) {
-  const map = Object.create(null);
-  const list = str.split(',');
-  for (let i = 0; i < list.length; i++) {
-    map[list[i]] = true;
-  }
-  return expectsLowerCase
-    ? val => map[val.toLowerCase()]
-    : val => map[val]
-}
-
-/**
- * Check if a tag is a built-in tag.
- */
-const isBuiltInTag = makeMap('slot,component', true);
-
-/**
- * Check if an attribute is a reserved attribute.
- */
-const isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
-
-/**
- * Remove an item from an array.
- */
-function remove (arr, item) {
-  if (arr.length) {
-    const index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
-  }
-}
-
-/**
- * Check whether an object has the property.
- */
-const hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
-
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  const cache = Object.create(null);
-  return (function cachedFn (str) {
-    const hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-const camelizeRE = /-(\w)/g;
-const camelize = cached((str) => {
-  return str.replace(camelizeRE, (_, c) => c ? c.toUpperCase() : '')
-});
-
-/**
- * Capitalize a string.
- */
-const capitalize = cached((str) => {
-  return str.charAt(0).toUpperCase() + str.slice(1)
-});
-
-/**
- * Hyphenate a camelCase string.
- */
-const hyphenateRE = /\B([A-Z])/g;
-const hyphenate = cached((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) {
-    const 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)
-}
-
-const bind = Function.prototype.bind
-  ? nativeBind
-  : polyfillBind;
-
-/**
- * Convert an Array-like object to a real Array.
- */
-function toArray (list, start) {
-  start = start || 0;
-  let i = list.length - start;
-  const ret = new Array(i);
-  while (i--) {
-    ret[i] = list[i + start];
-  }
-  return ret
-}
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (const key in _from) {
-    to[key] = _from[key];
-  }
-  return to
-}
-
-/**
- * Merge an Array of Objects into a single Object.
- */
-function toObject (arr) {
-  const res = {};
-  for (let 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.
- */
-const no = (a, b, c) => false;
-
-/* eslint-enable no-unused-vars */
-
-/**
- * Return the same value.
- */
-const identity = (_) => _;
-
-/**
- * Generate a string containing static keys from compiler modules.
- */
-function genStaticKeys (modules) {
-  return modules.reduce((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
-  const isObjectA = isObject(a);
-  const isObjectB = isObject(b);
-  if (isObjectA && isObjectB) {
-    try {
-      const isArrayA = Array.isArray(a);
-      const isArrayB = Array.isArray(b);
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every((e, i) => {
-          return looseEqual(e, b[i])
-        })
-      } else if (a instanceof Date && b instanceof Date) {
-        return a.getTime() === b.getTime()
-      } else if (!isArrayA && !isArrayB) {
-        const keysA = Object.keys(a);
-        const keysB = Object.keys(b);
-        return keysA.length === keysB.length && keysA.every(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 (let 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) {
-  let called = false;
-  return function () {
-    if (!called) {
-      called = true;
-      fn.apply(this, arguments);
-    }
-  }
-}
-
-const SSR_ATTR = 'data-server-rendered';
-
-const ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-const 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
- */
-const unicodeLetters = '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) {
-  const 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.
- */
-const bailRE = new RegExp(`[^${unicodeLetters}.$_\\d]`);
-function parsePath (path) {
-  if (bailRE.test(path)) {
-    return
-  }
-  const segments = path.split('.');
-  return function (obj) {
-    for (let i = 0; i < segments.length; i++) {
-      if (!obj) return
-      obj = obj[segments[i]];
-    }
-    return obj
-  }
-}
-
-/*  */
-
-// can we use __proto__?
-const hasProto = '__proto__' in {};
-
-// Browser environment sniffing
-const inBrowser = typeof window !== 'undefined';
-const inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-const weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-const UA = inBrowser && window.navigator.userAgent.toLowerCase();
-const isIE = UA && /msie|trident/.test(UA);
-const isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-const isEdge = UA && UA.indexOf('edge/') > 0;
-const isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-const isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-const isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-const isPhantomJS = UA && /phantomjs/.test(UA);
-const isFF = UA && UA.match(/firefox\/(\d+)/);
-
-// Firefox has a "watch" function on Object.prototype...
-const nativeWatch = ({}).watch;
-
-let supportsPassive = false;
-if (inBrowser) {
-  try {
-    const opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      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
-let _isServer;
-const isServerRendering = () => {
-  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
-const devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
-
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
-
-const hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
-
-let _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 = class Set   {
-    
-    constructor () {
-      this.set = Object.create(null);
-    }
-    has (key) {
-      return this.set[key] === true
-    }
-    add (key) {
-      this.set[key] = true;
-    }
-    clear () {
-      this.set = Object.create(null);
-    }
-  };
-}
-
-/*  */
-
-let warn = noop;
-let tip = noop;
-let generateComponentTrace = (noop); // work around flow check
-let formatComponentName = (noop);
-
-{
-  const hasConsole = typeof console !== 'undefined';
-  const classifyRE = /(?:^|[-_])(\w)/g;
-  const classify = str => str
-    .replace(classifyRE, c => c.toUpperCase())
-    .replace(/[-_]/g, '');
-
-  warn = (msg, vm) => {
-    const 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 = (msg, vm) => {
-    if (hasConsole && (!config.silent)) {
-      console.warn(`[Vue tip]: ${msg}` + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
-    }
-  };
-
-  formatComponentName = (vm, includeFile) => {
-    if (vm.$root === vm) {
-      return '<Root>'
-    }
-    const options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm;
-    let name = options.name || options._componentTag;
-    const file = options.__file;
-    if (!name && file) {
-      const match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
-    }
-
-    return (
-      (name ? `<${classify(name)}>` : `<Anonymous>`) +
-      (file && includeFile !== false ? ` at ${file}` : '')
-    )
-  };
-
-  const repeat = (str, n) => {
-    let res = '';
-    while (n) {
-      if (n % 2 === 1) res += str;
-      if (n > 1) str += str;
-      n >>= 1;
-    }
-    return res
-  };
-
-  generateComponentTrace = vm => {
-    if (vm._isVue && vm.$parent) {
-      const tree = [];
-      let currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          const 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((vm, i) => `${
-          i === 0 ? '---> ' : repeat(' ', 5 + i * 2)
-        }${
-          Array.isArray(vm)
-            ? `${formatComponentName(vm[0])}... (${vm[1]} recursive calls)`
-            : formatComponentName(vm)
-        }`)
-        .join('\n')
-    } else {
-      return `\n\n(found in ${formatComponentName(vm)})`
-    }
-  };
-}
-
-/*  */
-
-let uid = 0;
-
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-class Dep {
-  
-  
-  
-
-  constructor () {
-    this.id = uid++;
-    this.subs = [];
-  }
-
-  addSub (sub) {
-    this.subs.push(sub);
-  }
-
-  removeSub (sub) {
-    remove(this.subs, sub);
-  }
-
-  depend () {
-    if (Dep.target) {
-      Dep.target.addDep(this);
-    }
-  }
-
-  notify () {
-    // stabilize the subscriber list first
-    const 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((a, b) => a.id - b.id);
-    }
-    for (let 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;
-const targetStack = [];
-
-function pushTarget (target) {
-  targetStack.push(target);
-  Dep.target = target;
-}
-
-function popTarget () {
-  targetStack.pop();
-  Dep.target = targetStack[targetStack.length - 1];
-}
-
-/*  */
-
-class VNode {
-  
-  
-  
-  
-  
-  
-   // rendered in this component's scope
-  
-  
-   // component instance
-   // component placeholder node
-
-  // strictly internal
-   // contains raw HTML? (server only)
-   // hoisted static node
-   // necessary for enter transition check
-   // empty comment placeholder?
-   // is a cloned node?
-   // is a v-once node?
-   // async component factory function
-  
-  
-  
-   // real context vm for functional nodes
-   // for SSR caching
-   // used to store functional render context for devtools
-   // functional scope id support
-
-  constructor (
-    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;
-  }
-
-  // DEPRECATED: alias for componentInstance for backwards compat.
-  /* istanbul ignore next */
-  get child () {
-    return this.componentInstance
-  }
-}
-
-const createEmptyVNode = (text = '') => {
-  const 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) {
-  const 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
- */
-
-const arrayProto = Array.prototype;
-const arrayMethods = Object.create(arrayProto);
-
-const methodsToPatch = [
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-];
-
-/**
- * Intercept mutating methods and emit events
- */
-methodsToPatch.forEach(function (method) {
-  // cache original method
-  const original = arrayProto[method];
-  def(arrayMethods, method, function mutator (...args) {
-    const result = original.apply(this, args);
-    const ob = this.__ob__;
-    let 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
-  });
-});
-
-/*  */
-
-const arrayKeys = Object.getOwnPropertyNames(arrayMethods);
-
-/**
- * In some cases we may want to disable observation inside a component's
- * update computation.
- */
-let 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.
- */
-class Observer {
-  
-  
-   // number of vms that have this object as root $data
-
-  constructor (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.
-   */
-  walk (obj) {
-    const keys = Object.keys(obj);
-    for (let i = 0; i < keys.length; i++) {
-      defineReactive$$1(obj, keys[i]);
-    }
-  }
-
-  /**
-   * Observe a list of Array items.
-   */
-  observeArray (items) {
-    for (let i = 0, l = items.length; i < l; i++) {
-      observe(items[i]);
-    }
-  }
-}
-
-// helpers
-
-/**
- * Augment a target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment a target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (let i = 0, l = keys.length; i < l; i++) {
-    const key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  let ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    shouldObserve &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
-  }
-  if (asRootData && ob) {
-    ob.vmCount++;
-  }
-  return ob
-}
-
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive$$1 (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  const dep = new Dep();
-
-  const property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  const getter = property && property.get;
-  const setter = property && property.set;
-  if ((!getter || setter) && arguments.length === 2) {
-    val = obj[key];
-  }
-
-  let childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      const 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) {
-      const 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
-  }
-  const 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
-  }
-  const 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 (let e, 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.
- */
-const 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
-  let key, toVal, fromVal;
-
-  const keys = hasSymbol
-    ? Reflect.ownKeys(from)
-    : Object.keys(from);
-
-  for (let 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
-      const instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      const 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
-) {
-  const res = childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal;
-  return res
-    ? dedupeHooks(res)
-    : res
-}
-
-function dedupeHooks (hooks) {
-  const res = [];
-  for (let i = 0; i < hooks.length; i++) {
-    if (res.indexOf(hooks[i]) === -1) {
-      res.push(hooks[i]);
-    }
-  }
-  return res
-}
-
-LIFECYCLE_HOOKS.forEach(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
-) {
-  const 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
-  const ret = {};
-  extend(ret, parentVal);
-  for (const key in childVal) {
-    let parent = ret[key];
-    const child = childVal[key];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key] = 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
-  const ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) extend(ret, childVal);
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-const defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-/**
- * Validate component names
- */
-function checkComponents (options) {
-  for (const key in options.components) {
-    validateComponentName(key);
-  }
-}
-
-function validateComponentName (name) {
-  if (!new RegExp(`^[a-zA-Z][\\-\\.0-9_${unicodeLetters}]*$`).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) {
-  const props = options.props;
-  if (!props) return
-  const res = {};
-  let 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 (const 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) {
-  const inject = options.inject;
-  if (!inject) return
-  const normalized = options.inject = {};
-  if (Array.isArray(inject)) {
-    for (let i = 0; i < inject.length; i++) {
-      normalized[inject[i]] = { from: inject[i] };
-    }
-  } else if (isPlainObject(inject)) {
-    for (const key in inject) {
-      const 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) {
-  const dirs = options.directives;
-  if (dirs) {
-    for (const key in dirs) {
-      const 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 (let i = 0, l = child.mixins.length; i < l; i++) {
-        parent = mergeOptions(parent, child.mixins[i], vm);
-      }
-    }
-  }
-
-  const options = {};
-  let key;
-  for (key in parent) {
-    mergeField(key);
-  }
-  for (key in child) {
-    if (!hasOwn(parent, key)) {
-      mergeField(key);
-    }
-  }
-  function mergeField (key) {
-    const 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
-  }
-  const assets = options[type];
-  // check local registration variations first
-  if (hasOwn(assets, id)) return assets[id]
-  const camelizedId = camelize(id);
-  if (hasOwn(assets, camelizedId)) return assets[camelizedId]
-  const PascalCaseId = capitalize(camelizedId);
-  if (hasOwn(assets, PascalCaseId)) return assets[PascalCaseId]
-  // fallback to prototype chain
-  const 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
-) {
-  const prop = propOptions[key];
-  const absent = !hasOwn(propsData, key);
-  let value = propsData[key];
-  // boolean casting
-  const 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
-      const 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.
-    const 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
-  }
-  const 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
-  }
-  let type = prop.type;
-  let valid = !type || type === true;
-  const expectedTypes = [];
-  if (type) {
-    if (!Array.isArray(type)) {
-      type = [type];
-    }
-    for (let i = 0; i < type.length && !valid; i++) {
-      const assertedType = assertType(value, type[i]);
-      expectedTypes.push(assertedType.expectedType || '');
-      valid = assertedType.valid;
-    }
-  }
-
-  if (!valid) {
-    warn(
-      getInvalidTypeMessage(name, value, expectedTypes),
-      vm
-    );
-    return
-  }
-  const validator = prop.validator;
-  if (validator) {
-    if (!validator(value)) {
-      warn(
-        'Invalid prop: custom validator check failed for prop "' + name + '".',
-        vm
-      );
-    }
-  }
-}
-
-const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
-
-function assertType (value, type) {
-  let valid;
-  const expectedType = getType(type);
-  if (simpleCheckRE.test(expectedType)) {
-    const 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,
-    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) {
-  const 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 (let i = 0, len = expectedTypes.length; i < len; i++) {
-    if (isSameType(expectedTypes[i], type)) {
-      return i
-    }
-  }
-  return -1
-}
-
-function getInvalidTypeMessage (name, value, expectedTypes) {
-  let message = `Invalid prop: type check failed for prop "${name}".` +
-    ` Expected ${expectedTypes.map(capitalize).join(', ')}`;
-  const expectedType = expectedTypes[0];
-  const receivedType = toRawType(value);
-  const expectedValue = styleValue(value, expectedType);
-  const 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) {
-  const explicitTypes = ['string', 'number', 'boolean'];
-  return explicitTypes.some(elem => value.toLowerCase() === elem)
-}
-
-function isBoolean (...args) {
-  return args.some(elem => elem.toLowerCase() === 'boolean')
-}
-
-/*  */
-
-function handleError (err, vm, info) {
-  if (vm) {
-    let cur = vm;
-    while ((cur = cur.$parent)) {
-      const hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (let i = 0; i < hooks.length; i++) {
-          try {
-            const capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) return
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
-          }
-        }
-      }
-    }
-  }
-  globalHandleError(err, vm, info);
-}
-
-function invokeWithErrorHandling (
-  handler,
-  context,
-  args,
-  vm,
-  info
-) {
-  let res;
-  try {
-    res = args ? handler.apply(context, args) : handler.call(context);
-    if (res && !res._isVue && isPromise(res)) {
-      res.catch(e => handleError(e, vm, info + ` (Promise/async)`));
-    }
-  } 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
-  }
-}
-
-/*  */
-
-let isUsingMicroTask = false;
-
-const callbacks = [];
-let pending = false;
-
-function flushCallbacks () {
-  pending = false;
-  const copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (let 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).
-let 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)) {
-  const p = Promise.resolve();
-  timerFunc = () => {
-    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)
-  let counter = 1;
-  const observer = new MutationObserver(flushCallbacks);
-  const textNode = document.createTextNode(String(counter));
-  observer.observe(textNode, {
-    characterData: true
-  });
-  timerFunc = () => {
-    counter = (counter + 1) % 2;
-    textNode.data = String(counter);
-  };
-  isUsingMicroTask = true;
-} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  // Fallback to setImmediate.
-  // Techinically it leverages the (macro) task queue,
-  // but it is still a better choice than setTimeout.
-  timerFunc = () => {
-    setImmediate(flushCallbacks);
-  };
-} else {
-  // Fallback to setTimeout.
-  timerFunc = () => {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-function nextTick (cb, ctx) {
-  let _resolve;
-  callbacks.push(() => {
-    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(resolve => {
-      _resolve = resolve;
-    })
-  }
-}
-
-/*  */
-
-let mark;
-let measure;
-
-{
-  const perf = inBrowser && window.performance;
-  /* istanbul ignore if */
-  if (
-    perf &&
-    perf.mark &&
-    perf.measure &&
-    perf.clearMarks &&
-    perf.clearMeasures
-  ) {
-    mark = tag => perf.mark(tag);
-    measure = (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 */
-
-let initProxy;
-
-{
-  const 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
-  );
-
-  const warnNonPresent = (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
-    );
-  };
-
-  const warnReservedPrefix = (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
-    );
-  };
-
-  const hasProxy =
-    typeof Proxy !== 'undefined' && isNative(Proxy);
-
-  if (hasProxy) {
-    const isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-    config.keyCodes = new Proxy(config.keyCodes, {
-      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
-        }
-      }
-    });
-  }
-
-  const hasHandler = {
-    has (target, key) {
-      const has = key in target;
-      const 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
-    }
-  };
-
-  const getHandler = {
-    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
-      const options = vm.$options;
-      const handlers = options.render && options.render._withStripped
-        ? getHandler
-        : hasHandler;
-      vm._renderProxy = new Proxy(vm, handlers);
-    } else {
-      vm._renderProxy = vm;
-    }
-  };
-}
-
-/*  */
-
-const 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) {
-  let i, keys;
-  const isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
-    return
-  }
-  if (val.__ob__) {
-    const 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);
-  }
-}
-
-/*  */
-
-const normalizeEvent = cached((name) => {
-  const passive = name.charAt(0) === '&';
-  name = passive ? name.slice(1) : name;
-  const once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-  name = once$$1 ? name.slice(1) : name;
-  const capture = name.charAt(0) === '!';
-  name = capture ? name.slice(1) : name;
-  return {
-    name,
-    once: once$$1,
-    capture,
-    passive
-  }
-});
-
-function createFnInvoker (fns, vm) {
-  function invoker () {
-    const fns = invoker.fns;
-    if (Array.isArray(fns)) {
-      const cloned = fns.slice();
-      for (let i = 0; i < cloned.length; i++) {
-        invokeWithErrorHandling(cloned[i], null, arguments, 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$$1,
-  createOnceHandler,
-  vm
-) {
-  let name, def$$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 = {});
-  }
-  let invoker;
-  const 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.
-  const propOptions = Ctor.options.props;
-  if (isUndef(propOptions)) {
-    return
-  }
-  const res = {};
-  const { attrs, props } = data;
-  if (isDef(attrs) || isDef(props)) {
-    for (const key in propOptions) {
-      const altKey = hyphenate(key);
-      {
-        const 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 (let 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) {
-  const res = [];
-  let 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}_${i}__`;
-        }
-        res.push(c);
-      }
-    }
-  }
-  return res
-}
-
-/*  */
-
-function initProvide (vm) {
-  const provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
-  }
-}
-
-function initInjections (vm) {
-  const result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    toggleObserving(false);
-    Object.keys(result).forEach(key => {
-      /* istanbul ignore else */
-      {
-        defineReactive$$1(vm, key, result[key], () => {
-          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
-    const result = Object.create(null);
-    const keys = hasSymbol
-      ? Reflect.ownKeys(inject)
-      : Object.keys(inject);
-
-    for (let i = 0; i < keys.length; i++) {
-      const key = keys[i];
-      // #6574 in case the inject object is observed...
-      if (key === '__ob__') continue
-      const provideKey = inject[key].from;
-      let 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]) {
-          const 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 {}
-  }
-  const slots = {};
-  for (let i = 0, l = children.length; i < l; i++) {
-    const child = children[i];
-    const 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
-    ) {
-      const name = data.slot;
-      const 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 (const name in slots) {
-    if (slots[name].every(isWhitespace)) {
-      delete slots[name];
-    }
-  }
-  return slots
-}
-
-function isWhitespace (node) {
-  return (node.isComment && !node.asyncFactory) || node.text === ' '
-}
-
-/*  */
-
-function normalizeScopedSlots (
-  slots,
-  normalSlots,
-  prevSlots
-) {
-  let res;
-  if (!slots) {
-    res = {};
-  } else if (slots._normalized) {
-    // fast path 1: child component re-render only, parent did not change
-    return slots._normalized
-  } else if (
-    slots.$stable &&
-    prevSlots &&
-    prevSlots !== emptyObject &&
-    Object.keys(normalSlots).length === 0
-  ) {
-    // fast path 2: stable scoped slots w/ no normal slots to proxy,
-    // only need to normalize once
-    return prevSlots
-  } else {
-    res = {};
-    for (const key in slots) {
-      if (slots[key] && key[0] !== '$') {
-        res[key] = normalizeScopedSlot(normalSlots, key, slots[key]);
-      }
-    }
-  }
-  // expose normal slots on scopedSlots
-  for (const key in normalSlots) {
-    if (!(key in res)) {
-      res[key] = proxyNormalSlot(normalSlots, key);
-    }
-  }
-  // 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', slots ? !!slots.$stable : true);
-  return res
-}
-
-function normalizeScopedSlot(normalSlots, key, fn) {
-  const normalized = function () {
-    let 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
-      ? 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 () => slots[key]
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  let 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 = [];
-      const iterator = val[Symbol.iterator]();
-      let 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
-) {
-  const scopedSlotFn = this.$scopedSlots[name];
-  let 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;
-  }
-
-  const 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
-) {
-  const 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);
-      }
-      let hash;
-      for (const key in value) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          const type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        const camelizedKey = camelize(key);
-        if (!(key in hash) && !(camelizedKey in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            const on = data.on || (data.on = {});
-            on[`update:${camelizedKey}`] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      }
-    }
-  }
-  return data
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  const cached = this._staticTrees || (this._staticTrees = []);
-  let 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 (let 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 {
-      const on = data.on = data.on ? extend({}, data.on) : {};
-      for (const key in value) {
-        const existing = on[key];
-        const ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
-  }
-  return data
-}
-
-/*  */
-
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  hasDynamicKeys,
-  res
-) {
-  res = res || { $stable: !hasDynamicKeys };
-  for (let i = 0; i < fns.length; i++) {
-    const slot = fns[i];
-    if (Array.isArray(slot)) {
-      resolveScopedSlots(slot, hasDynamicKeys, res);
-    } 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;
-    }
-  }
-  return res
-}
-
-/*  */
-
-function bindDynamicKeys (baseObj, values) {
-  for (let i = 0; i < values.length; i += 2) {
-    const key = values[i];
-    if (typeof key === 'string' && key) {
-      baseObj[values[i]] = values[i + 1];
-    } else if (key !== '' && key !== null) {
-      // null is a speical 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
-) {
-  const options = Ctor.options;
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  let 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;
-  }
-  const isCompiled = isTrue(options._compiled);
-  const 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 = () => {
-    if (!this.$slots) {
-      normalizeScopedSlots(
-        data.scopedSlots,
-        this.$slots = resolveSlots(children, parent)
-      );
-    }
-    return this.$slots
-  };
-
-  Object.defineProperty(this, 'scopedSlots', ({
-    enumerable: true,
-    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 = (a, b, c, d) => {
-      const 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 = (a, b, c, d) => createElement(contextVm, a, b, c, d, needNormalization);
-  }
-}
-
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  const options = Ctor.options;
-  const props = {};
-  const propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (const 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);
-  }
-
-  const renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
-
-  const 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)) {
-    const vnodes = normalizeChildren(vnode) || [];
-    const res = new Array(vnodes.length);
-    for (let 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.
-  const 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 (const key in from) {
-    to[camelize(key)] = from[key];
-  }
-}
-
-/*  */
-
-/*  */
-
-/*  */
-
-/*  */
-
-// inline hooks to be invoked on component VNodes during patch
-const componentVNodeHooks = {
-  init (vnode, hydrating) {
-    if (
-      vnode.componentInstance &&
-      !vnode.componentInstance._isDestroyed &&
-      vnode.data.keepAlive
-    ) {
-      // kept-alive components, treat as a patch
-      const mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
-    } else {
-      const child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance
-      );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    }
-  },
-
-  prepatch (oldVnode, vnode) {
-    const options = vnode.componentOptions;
-    const child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
-
-  insert (vnode) {
-    const { context, componentInstance } = vnode;
-    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 (vnode) {
-    const { componentInstance } = vnode;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
-      }
-    }
-  }
-};
-
-const hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  const 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
-  let 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
-  const 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
-  const 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
-    const slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
-    }
-  }
-
-  // install component management hooks onto the placeholder node
-  installComponentHooks(data);
-
-  // return a placeholder vnode
-  const name = Ctor.options.name || tag;
-  const vnode = new VNode(
-    `vue-component-${Ctor.cid}${name ? `-${name}` : ''}`,
-    data, undefined, undefined, undefined, context,
-    { Ctor, propsData, listeners, tag, children },
-    asyncFactory
-  );
-
-  return vnode
-}
-
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-) {
-  const options = {
-    _isComponent: true,
-    _parentVnode: vnode,
-    parent
-  };
-  // check inline-template render functions
-  const inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
-}
-
-function installComponentHooks (data) {
-  const hooks = data.hook || (data.hook = {});
-  for (let i = 0; i < hooksToMerge.length; i++) {
-    const key = hooksToMerge[i];
-    const existing = hooks[key];
-    const toMerge = componentVNodeHooks[key];
-    if (existing !== toMerge && !(existing && existing._merged)) {
-      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
-    }
-  }
-}
-
-function mergeHook$1 (f1, f2) {
-  const merged = (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) {
-  const prop = (options.model && options.model.prop) || 'value';
-  const event = (options.model && options.model.event) || 'input'
-  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
-  const on = data.on || (data.on = {});
-  const existing = on[event];
-  const 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;
-  }
-}
-
-/*  */
-
-const SIMPLE_NORMALIZE = 1;
-const 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);
-  }
-  let vnode, ns;
-  if (typeof tag === 'string') {
-    let Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      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 (let i = 0, l = vnode.children.length; i < l; i++) {
-      const 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
-  const options = vm.$options;
-  const parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  const 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 = (a, b, c, d) => createElement(vm, a, b, c, d, false);
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = (a, b, c, d) => 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
-  const parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  {
-    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, () => {
-      !isUpdatingChildComponent && warn(`$attrs is readonly.`, vm);
-    }, true);
-    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, () => {
-      !isUpdatingChildComponent && warn(`$listeners is readonly.`, vm);
-    }, true);
-  }
-}
-
-let 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 () {
-    const vm = this;
-    const { render, _parentVnode } = vm.$options;
-
-    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
-    let vnode;
-    try {
-      // There's no need to maintain a stack becaues 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
-) {
-  const node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data, context, children, tag };
-  return node
-}
-
-function resolveAsyncComponent (
-  factory,
-  baseCtor
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
-
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
-
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
-
-  const owner = currentRenderingInstance;
-  if (isDef(factory.owners)) {
-    // already pending
-    factory.owners.push(owner);
-  } else {
-    const owners = factory.owners = [owner];
-    let sync = true;
-
-    const forceRender = (renderCompleted) => {
-      for (let i = 0, l = owners.length; i < l; i++) {
-        (owners[i]).$forceUpdate();
-      }
-
-      if (renderCompleted) {
-        owners.length = 0;
-      }
-    };
-
-    const resolve = once((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;
-      }
-    });
-
-    const reject = once(reason => {
-      warn(
-        `Failed to resolve async component: ${String(factory)}` +
-        (reason ? `\nReason: ${reason}` : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender(true);
-      }
-    });
-
-    const 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 {
-            setTimeout(() => {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender(false);
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(() => {
-            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 (let i = 0; i < children.length; i++) {
-      const 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
-  const listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-let target;
-
-function add (event, fn) {
-  target.$on(event, fn);
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function createOnceHandler (event, fn) {
-  const _target = target;
-  return function onceHandler () {
-    const 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) {
-  const hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    const vm = this;
-    if (Array.isArray(event)) {
-      for (let 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) {
-    const 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) {
-    const vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (let i = 0, l = event.length; i < l; i++) {
-        vm.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    const cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    // specific handler
-    let cb;
-    let 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) {
-    const vm = this;
-    {
-      const 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}".`
-        );
-      }
-    }
-    let cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      const args = toArray(arguments, 1);
-      const info = `event handler for "${event}"`;
-      for (let i = 0, l = cbs.length; i < l; i++) {
-        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
-
-let activeInstance = null;
-let isUpdatingChildComponent = false;
-
-function setActiveInstance(vm) {
-  const prevActiveInstance = activeInstance;
-  activeInstance = vm;
-  return () => {
-    activeInstance = prevActiveInstance;
-  }
-}
-
-function initLifecycle (vm) {
-  const options = vm.$options;
-
-  // locate first non-abstract parent
-  let 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) {
-    const vm = this;
-    const prevEl = vm.$el;
-    const prevVnode = vm._vnode;
-    const 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 () {
-    const vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
-
-  Vue.prototype.$destroy = function () {
-    const vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    const parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    let 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');
-
-  let updateComponent;
-  /* istanbul ignore if */
-  if (config.performance && mark) {
-    updateComponent = () => {
-      const name = vm._name;
-      const id = vm._uid;
-      const startTag = `vue-perf-start:${id}`;
-      const endTag = `vue-perf-end:${id}`;
-
-      mark(startTag);
-      const 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 = () => {
-      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 () {
-      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.
-  const hasDynamicScopedSlot = !!(
-    (parentVnode.data.scopedSlots && !parentVnode.data.scopedSlots.$stable) ||
-    (vm.$scopedSlots !== emptyObject && !vm.$scopedSlots.$stable)
-  );
-
-  // 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.
-  const 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);
-    const props = vm._props;
-    const propKeys = vm.$options._propKeys || [];
-    for (let i = 0; i < propKeys.length; i++) {
-      const key = propKeys[i];
-      const 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;
-  const 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 (let 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 (let 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();
-  const handlers = vm.$options[hook];
-  const info = `${hook} hook`;
-  if (handlers) {
-    for (let i = 0, j = handlers.length; i < j; i++) {
-      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
-    }
-  }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-  popTarget();
-}
-
-/*  */
-
-const MAX_UPDATE_COUNT = 100;
-
-const queue = [];
-const activatedChildren = [];
-let has = {};
-let circular = {};
-let waiting = false;
-let flushing = false;
-let 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.
-let currentFlushTimestamp = 0;
-
-// Async edge case fix requires storing an event listener's attach timestamp.
-let 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.
-if (inBrowser && getNow() > document.createEvent('Event').timeStamp) {
-  // if the low-res timestamp which is bigger than the event timestamp
-  // (which is evaluated AFTER) it means the event is using a hi-res timestamp,
-  // and we need to use the hi-res version for event listeners as well.
-  getNow = () => performance.now();
-}
-
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  currentFlushTimestamp = getNow();
-  flushing = true;
-  let 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((a, b) => 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
-  const activatedQueue = activatedChildren.slice();
-  const 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) {
-  let i = queue.length;
-  while (i--) {
-    const watcher = queue[i];
-    const 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 (let 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) {
-  const 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.
-      let 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);
-    }
-  }
-}
-
-/*  */
-
-
-
-let 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.
- */
-class Watcher {
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-
-  constructor (
-    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.
-   */
-  get () {
-    pushTarget(this);
-    let value;
-    const 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.
-   */
-  addDep (dep) {
-    const 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.
-   */
-  cleanupDeps () {
-    let i = this.deps.length;
-    while (i--) {
-      const dep = this.deps[i];
-      if (!this.newDepIds.has(dep.id)) {
-        dep.removeSub(this);
-      }
-    }
-    let 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.
-   */
-  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.
-   */
-  run () {
-    if (this.active) {
-      const 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
-        const 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.
-   */
-  evaluate () {
-    this.value = this.get();
-    this.dirty = false;
-  }
-
-  /**
-   * Depend on all deps collected by this watcher.
-   */
-  depend () {
-    let i = this.deps.length;
-    while (i--) {
-      this.deps[i].depend();
-    }
-  }
-
-  /**
-   * Remove self from all dependencies' subscriber list.
-   */
-  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);
-      }
-      let i = this.deps.length;
-      while (i--) {
-        this.deps[i].removeSub(this);
-      }
-      this.active = false;
-    }
-  }
-}
-
-/*  */
-
-const 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 = [];
-  const 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) {
-  const propsData = vm.$options.propsData || {};
-  const props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  const keys = vm.$options._propKeys = [];
-  const isRoot = !vm.$parent;
-  // root instance props should be converted
-  if (!isRoot) {
-    toggleObserving(false);
-  }
-  for (const key in propsOptions) {
-    keys.push(key);
-    const value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    {
-      const 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, () => {
-        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: "${key}"`,
-            vm
-          );
-        }
-      });
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, `_props`, key);
-    }
-  }
-  toggleObserving(true);
-}
-
-function initData (vm) {
-  let data = vm.$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
-  const keys = Object.keys(data);
-  const props = vm.$options.props;
-  const methods = vm.$options.methods;
-  let i = keys.length;
-  while (i--) {
-    const 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();
-  }
-}
-
-const computedWatcherOptions = { lazy: true };
-
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  const watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  const isSSR = isServerRendering();
-
-  for (const key in computed) {
-    const userDef = computed[key];
-    const getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if (getter == null) {
-      warn(
-        `Getter is missing for computed property "${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 "${key}" is already defined as a prop.`, vm);
-      }
-    }
-  }
-}
-
-function defineComputed (
-  target,
-  key,
-  userDef
-) {
-  const shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : createGetterInvoker(userDef);
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : createGetterInvoker(userDef.get)
-      : noop;
-    sharedPropertyDefinition.set = userDef.set || noop;
-  }
-  if (sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        `Computed property "${key}" was assigned to but it has no setter.`,
-        this
-      );
-    };
-  }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function createComputedGetter (key) {
-  return function computedGetter () {
-    const 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) {
-  const props = vm.$options.props;
-  for (const key in methods) {
-    {
-      if (typeof methods[key] !== 'function') {
-        warn(
-          `Method "${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 $.`
-        );
-      }
-    }
-    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
-  }
-}
-
-function initWatch (vm, watch) {
-  for (const key in watch) {
-    const handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (let i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
-      }
-    } else {
-      createWatcher(vm, key, handler);
-    }
-  }
-}
-
-function createWatcher (
-  vm,
-  expOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$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.
-  const dataDef = {};
-  dataDef.get = function () { return this._data };
-  const 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.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
-    const vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    const watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      try {
-        cb.call(vm, watcher.value);
-      } catch (error) {
-        handleError(error, vm, `callback for immediate watcher "${watcher.expression}"`);
-      }
-    }
-    return function unwatchFn () {
-      watcher.teardown();
-    }
-  };
-}
-
-/*  */
-
-let uid$3 = 0;
-
-function initMixin (Vue) {
-  Vue.prototype._init = function (options) {
-    const vm = this;
-    // a uid
-    vm._uid = uid$3++;
-
-    let startTag, endTag;
-    /* istanbul ignore if */
-    if (config.performance && mark) {
-      startTag = `vue-perf-start:${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) {
-  const opts = vm.$options = Object.create(vm.constructor.options);
-  // doing this because it's faster than dynamic enumeration.
-  const parentVnode = options._parentVnode;
-  opts.parent = options.parent;
-  opts._parentVnode = parentVnode;
-
-  const 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) {
-  let options = Ctor.options;
-  if (Ctor.super) {
-    const superOptions = resolveConstructorOptions(Ctor.super);
-    const 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)
-      const 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) {
-  let modified;
-  const latest = Ctor.options;
-  const sealed = Ctor.sealedOptions;
-  for (const 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) {
-    const installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
-    if (installedPlugins.indexOf(plugin) > -1) {
-      return this
-    }
-
-    // additional parameters
-    const 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;
-  let cid = 1;
-
-  /**
-   * Class inheritance
-   */
-  Vue.extend = function (extendOptions) {
-    extendOptions = extendOptions || {};
-    const Super = this;
-    const SuperId = Super.cid;
-    const cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
-    if (cachedCtors[SuperId]) {
-      return cachedCtors[SuperId]
-    }
-
-    const name = extendOptions.name || Super.options.name;
-    if (name) {
-      validateComponentName(name);
-    }
-
-    const 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) {
-  const props = Comp.options.props;
-  for (const key in props) {
-    proxy(Comp.prototype, `_props`, key);
-  }
-}
-
-function initComputed$1 (Comp) {
-  const computed = Comp.options.computed;
-  for (const key in computed) {
-    defineComputed(Comp.prototype, key, computed[key]);
-  }
-}
-
-/*  */
-
-function initAssetRegisters (Vue) {
-  /**
-   * Create asset registration methods.
-   */
-  ASSET_TYPES.forEach(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) {
-  const { cache, keys, _vnode } = keepAliveInstance;
-  for (const key in cache) {
-    const cachedNode = cache[key];
-    if (cachedNode) {
-      const name = getComponentName(cachedNode.componentOptions);
-      if (name && !filter(name)) {
-        pruneCacheEntry(cache, key, keys, _vnode);
-      }
-    }
-  }
-}
-
-function pruneCacheEntry (
-  cache,
-  key,
-  keys,
-  current
-) {
-  const cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
-  }
-  cache[key] = null;
-  remove(keys, key);
-}
-
-const patternTypes = [String, RegExp, Array];
-
-var KeepAlive = {
-  name: 'keep-alive',
-  abstract: true,
-
-  props: {
-    include: patternTypes,
-    exclude: patternTypes,
-    max: [String, Number]
-  },
-
-  created () {
-    this.cache = Object.create(null);
-    this.keys = [];
-  },
-
-  destroyed () {
-    for (const key in this.cache) {
-      pruneCacheEntry(this.cache, key, this.keys);
-    }
-  },
-
-  mounted () {
-    this.$watch('include', val => {
-      pruneCache(this, name => matches(val, name));
-    });
-    this.$watch('exclude', val => {
-      pruneCache(this, name => !matches(val, name));
-    });
-  },
-
-  render () {
-    const slot = this.$slots.default;
-    const vnode = getFirstComponentChild(slot);
-    const componentOptions = vnode && vnode.componentOptions;
-    if (componentOptions) {
-      // check pattern
-      const name = getComponentName(componentOptions);
-      const { include, exclude } = this;
-      if (
-        // not included
-        (include && (!name || !matches(include, name))) ||
-        // excluded
-        (exclude && name && matches(exclude, name))
-      ) {
-        return vnode
-      }
-
-      const { cache, keys } = this;
-      const 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
-};
-
-/*  */
-
-function initGlobalAPI (Vue) {
-  // config
-  const configDef = {};
-  configDef.get = () => config;
-  {
-    configDef.set = () => {
-      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,
-    extend,
-    mergeOptions,
-    defineReactive: defineReactive$$1
-  };
-
-  Vue.set = set;
-  Vue.delete = del;
-  Vue.nextTick = nextTick;
-
-  // 2.6 explicit observable API
-  Vue.observable = (obj) => {
-    observe(obj);
-    return obj
-  };
-
-  Vue.options = Object.create(null);
-  ASSET_TYPES.forEach(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 () {
-    /* istanbul ignore next */
-    return this.$vnode && this.$vnode.ssrContext
-  }
-});
-
-// expose FunctionalRenderContext for ssr runtime helper installation
-Object.defineProperty(Vue, 'FunctionalRenderContext', {
-  value: FunctionalRenderContext
-});
-
-Vue.version = '2.6.6';
-
-/*  */
-
-// these are reserved for web because they are directly compiled away
-// during template compilation
-const isReservedAttr = makeMap('style,class');
-
-// attributes that should be using props for binding
-const acceptValue = makeMap('input,textarea,option,select,progress');
-const mustUseProp = (tag, type, attr) => {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
-
-const isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
-
-const isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
-
-const convertEnumeratedValue = (key, value) => {
-  return isFalsyAttrValue(value) || value === 'false'
-    ? 'false'
-    // allow arbitrary string value for contenteditable
-    : key === 'contenteditable' && isValidContentEditableValue(value)
-      ? value
-      : 'true'
-};
-
-const 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'
-);
-
-const xlinkNS = 'http://www.w3.org/1999/xlink';
-
-const isXlink = (name) => {
-  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
-};
-
-const getXlinkProp = (name) => {
-  return isXlink(name) ? name.slice(6, name.length) : ''
-};
-
-const isFalsyAttrValue = (val) => {
-  return val == null || val === false
-};
-
-/*  */
-
-function genClassForVnode (vnode) {
-  let data = vnode.data;
-  let parentNode = vnode;
-  let 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) {
-  let res = '';
-  let stringified;
-  for (let 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) {
-  let res = '';
-  for (const key in value) {
-    if (value[key]) {
-      if (res) res += ' ';
-      res += key;
-    }
-  }
-  return res
-}
-
-/*  */
-
-const namespaceMap = {
-  svg: 'http://www.w3.org/2000/svg',
-  math: 'http://www.w3.org/1998/Math/MathML'
-};
-
-const 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.
-const 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
-);
-
-const isPreTag = (tag) => tag === 'pre';
-
-const isReservedTag = (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'
-  }
-}
-
-const 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]
-  }
-  const 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()))
-  }
-}
-
-const 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') {
-    const 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) {
-  const 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 (_, vnode) {
-    registerRef(vnode);
-  },
-  update (oldVnode, vnode) {
-    if (oldVnode.data.ref !== vnode.data.ref) {
-      registerRef(oldVnode, true);
-      registerRef(vnode);
-    }
-  },
-  destroy (vnode) {
-    registerRef(vnode, true);
-  }
-};
-
-function registerRef (vnode, isRemoval) {
-  const key = vnode.data.ref;
-  if (!isDef(key)) return
-
-  const vm = vnode.context;
-  const ref = vnode.componentInstance || vnode.elm;
-  const 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.
- */
-
-const emptyNode = new VNode('', {}, []);
-
-const 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
-  let i;
-  const typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
-  const typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
-  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
-}
-
-function createKeyToOldIdx (children, beginIdx, endIdx) {
-  let i, key;
-  const map = {};
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) map[key] = i;
-  }
-  return map
-}
-
-function createPatchFunction (backend) {
-  let i, j;
-  const cbs = {};
-
-  const { modules, nodeOps } = backend;
-
-  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$$1
-  }
-
-  function removeNode (el) {
-    const parent = nodeOps.parentNode(el);
-    // element may have already been removed due to v-html / v-text
-    if (isDef(parent)) {
-      nodeOps.removeChild(parent, el);
-    }
-  }
-
-  function isUnknownElement$$1 (vnode, inVPre) {
-    return (
-      !inVPre &&
-      !vnode.ns &&
-      !(
-        config.ignoredElements.length &&
-        config.ignoredElements.some(ignore => {
-          return isRegExp(ignore)
-            ? ignore.test(vnode.tag)
-            : ignore === vnode.tag
-        })
-      ) &&
-      config.isUnknownElement(vnode.tag)
-    )
-  }
-
-  let 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
-    }
-
-    const data = vnode.data;
-    const children = vnode.children;
-    const 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) {
-    let i = vnode.data;
-    if (isDef(i)) {
-      const 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) {
-    let 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.
-    let 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 (let 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 (let i = 0; i < cbs.create.length; ++i) {
-      cbs.create[i](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) {
-    let i;
-    if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setStyleScope(vnode.elm, i);
-    } else {
-      let 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) {
-    let i, j;
-    const 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 (parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      const 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)) {
-      let i;
-      const 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) {
-    let oldStartIdx = 0;
-    let newStartIdx = 0;
-    let oldEndIdx = oldCh.length - 1;
-    let oldStartVnode = oldCh[0];
-    let oldEndVnode = oldCh[oldEndIdx];
-    let newEndIdx = newCh.length - 1;
-    let newStartVnode = newCh[0];
-    let newEndVnode = newCh[newEndIdx];
-    let 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
-    const 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(parentElm, oldCh, oldStartIdx, oldEndIdx);
-    }
-  }
-
-  function checkDuplicateKeys (children) {
-    const seenKeys = {};
-    for (let i = 0; i < children.length; i++) {
-      const vnode = children[i];
-      const 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 (let i = start; i < end; i++) {
-      const 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);
-    }
-
-    const 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
-    }
-
-    let i;
-    const data = vnode.data;
-    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
-      i(oldVnode, vnode);
-    }
-
-    const oldCh = oldVnode.children;
-    const 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(elm, 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 (let i = 0; i < queue.length; ++i) {
-        queue[i].data.hook.insert(queue[i]);
-      }
-    }
-  }
-
-  let 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).
-  const 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) {
-    let i;
-    const { tag, data, children } = vnode;
-    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
-            let childrenMatch = true;
-            let childNode = elm.firstChild;
-            for (let i = 0; i < children.length; i++) {
-              if (!childNode || !hydrate(childNode, children[i], 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)) {
-        let fullInvoke = false;
-        for (const 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
-    }
-
-    let isInitialPatch = false;
-    const insertedVnodeQueue = [];
-
-    if (isUndef(oldVnode)) {
-      // empty mount (likely as component), create new root element
-      isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue);
-    } else {
-      const 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
-        const oldElm = oldVnode.elm;
-        const 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)) {
-          let ancestor = vnode.parent;
-          const patchable = isPatchable(vnode);
-          while (ancestor) {
-            for (let i = 0; i < cbs.destroy.length; ++i) {
-              cbs.destroy[i](ancestor);
-            }
-            ancestor.elm = vnode.elm;
-            if (patchable) {
-              for (let i = 0; i < cbs.create.length; ++i) {
-                cbs.create[i](emptyNode, ancestor);
-              }
-              // #6513
-              // invoke insert hooks that may have been merged by create hooks.
-              // e.g. for directives that uses the "inserted" hook.
-              const insert = ancestor.data.hook.insert;
-              if (insert.merged) {
-                // start at index 1 to avoid re-invoking component mounted hook
-                for (let i = 1; i < insert.fns.length; i++) {
-                  insert.fns[i]();
-                }
-              }
-            } else {
-              registerRef(ancestor);
-            }
-            ancestor = ancestor.parent;
-          }
-        }
-
-        // destroy old node
-        if (isDef(parentElm)) {
-          removeVnodes(parentElm, [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) {
-  const isCreate = oldVnode === emptyNode;
-  const isDestroy = vnode === emptyNode;
-  const oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
-  const newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
-
-  const dirsWithInsert = [];
-  const dirsWithPostpatch = [];
-
-  let 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) {
-    const callInsert = () => {
-      for (let 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', () => {
-      for (let 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);
-      }
-    }
-  }
-}
-
-const emptyModifiers = Object.create(null);
-
-function normalizeDirectives$1 (
-  dirs,
-  vm
-) {
-  const res = Object.create(null);
-  if (!dirs) {
-    // $flow-disable-line
-    return res
-  }
-  let 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) {
-  const 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) {
-  const opts = vnode.componentOptions;
-  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
-    return
-  }
-  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
-    return
-  }
-  let key, cur, old;
-  const elm = vnode.elm;
-  const oldAttrs = oldVnode.data.attrs || {};
-  let 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
-    ) {
-      const blocker = e => {
-        e.stopImmediatePropagation();
-        el.removeEventListener('input', blocker);
-      };
-      el.addEventListener('input', blocker);
-      // $flow-disable-line
-      el.__ieph = true; /* IE placeholder patched */
-    }
-    el.setAttribute(key, value);
-  }
-}
-
-var attrs = {
-  create: updateAttrs,
-  update: updateAttrs
-};
-
-/*  */
-
-function updateClass (oldVnode, vnode) {
-  const el = vnode.elm;
-  const data = vnode.data;
-  const oldData = oldVnode.data;
-  if (
-    isUndef(data.staticClass) &&
-    isUndef(data.class) && (
-      isUndef(oldData) || (
-        isUndef(oldData.staticClass) &&
-        isUndef(oldData.class)
-      )
-    )
-  ) {
-    return
-  }
-
-  let cls = genClassForVnode(vnode);
-
-  // handle transition classes
-  const transitionClass = el._transitionClasses;
-  if (isDef(transitionClass)) {
-    cls = concat(cls, stringifyClass(transitionClass));
-  }
-
-  // set the class
-  if (cls !== el._prevClass) {
-    el.setAttribute('class', cls);
-    el._prevClass = cls;
-  }
-}
-
-var klass = {
-  create: updateClass,
-  update: updateClass
-};
-
-/*  */
-
-const validDivisionCharRE = /[\w).+\-_$\]]/;
-
-function parseFilters (exp) {
-  let inSingle = false;
-  let inDouble = false;
-  let inTemplateString = false;
-  let inRegex = false;
-  let curly = 0;
-  let square = 0;
-  let paren = 0;
-  let lastFilterIndex = 0;
-  let 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) { // /
-        let j = i - 1;
-        let p;
-        // 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) {
-  const i = filter.indexOf('(');
-  if (i < 0) {
-    // _f: resolveFilter
-    return `_f("${filter}")(${exp})`
-  } else {
-    const name = filter.slice(0, i);
-    const 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]: ${msg}`);
-}
-/* eslint-enable no-unused-vars */
-
-function pluckModuleFunction (
-  modules,
-  key
-) {
-  return modules
-    ? modules.map(m => m[key]).filter(_ => _)
-    : []
-}
-
-function addProp (el, name, value, range, dynamic) {
-  (el.props || (el.props = [])).push(rangeSetItem({ name, value, dynamic }, range));
-  el.plain = false;
-}
-
-function addAttr (el, name, value, range, dynamic) {
-  const attrs = dynamic
-    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
-    : (el.attrs || (el.attrs = []));
-  attrs.push(rangeSetItem({ name, value, dynamic }, range));
-  el.plain = false;
-}
-
-// add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value, range) {
-  el.attrsMap[name] = value;
-  el.attrsList.push(rangeSetItem({ name, value }, range));
-}
-
-function addDirective (
-  el,
-  name,
-  rawName,
-  value,
-  arg,
-  isDynamicArg,
-  modifiers,
-  range
-) {
-  (el.directives || (el.directives = [])).push(rangeSetItem({
-    name,
-    rawName,
-    value,
-    arg,
-    isDynamicArg,
-    modifiers
-  }, range));
-  el.plain = false;
-}
-
-function prependModifierMarker (symbol, name, dynamic) {
-  return dynamic
-    ? `_p(${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);
-  }
-
-  let events;
-  if (modifiers.native) {
-    delete modifiers.native;
-    events = el.nativeEvents || (el.nativeEvents = {});
-  } else {
-    events = el.events || (el.events = {});
-  }
-
-  const newHandler = rangeSetItem({ value: value.trim(), dynamic }, range);
-  if (modifiers !== emptyObject) {
-    newHandler.modifiers = modifiers;
-  }
-
-  const 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
-) {
-  const dynamicValue =
-    getAndRemoveAttr(el, ':' + name) ||
-    getAndRemoveAttr(el, 'v-bind:' + name);
-  if (dynamicValue != null) {
-    return parseFilters(dynamicValue)
-  } else if (getStatic !== false) {
-    const 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
-) {
-  let val;
-  if ((val = el.attrsMap[name]) != null) {
-    const list = el.attrsList;
-    for (let 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
-) {
-  const list = el.attrsList;
-  for (let i = 0, l = list.length; i < l; i++) {
-    const 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
-) {
-  const { number, trim } = modifiers || {};
-
-  const baseValueExpression = '$$v';
-  let valueExpression = baseValueExpression;
-  if (trim) {
-    valueExpression =
-      `(typeof ${baseValueExpression} === 'string'` +
-      `? ${baseValueExpression}.trim()` +
-      `: ${baseValueExpression})`;
-  }
-  if (number) {
-    valueExpression = `_n(${valueExpression})`;
-  }
-  const 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
-) {
-  const 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]]
- *
- */
-
-let 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) {
-  let 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) {
-  const stringQuote = chr;
-  while (!eof()) {
-    chr = next();
-    if (chr === stringQuote) {
-      break
-    }
-  }
-}
-
-/*  */
-
-let warn$1;
-
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-const RANGE_TOKEN = '__r';
-const CHECKBOX_RADIO_TOKEN = '__c';
-
-function model (
-  el,
-  dir,
-  _warn
-) {
-  warn$1 = _warn;
-  const value = dir.value;
-  const modifiers = dir.modifiers;
-  const tag = el.tag;
-  const 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
-) {
-  const number = modifiers && modifiers.number;
-  const valueBinding = getBindingAttr(el, 'value') || 'null';
-  const trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
-  const 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
-) {
-  const number = modifiers && modifiers.number;
-  let valueBinding = getBindingAttr(el, 'value') || 'null';
-  valueBinding = number ? `_n(${valueBinding})` : valueBinding;
-  addProp(el, 'checked', `_q(${value},${valueBinding})`);
-  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
-}
-
-function genSelect (
-  el,
-  value,
-  modifiers
-) {
-  const number = modifiers && modifiers.number;
-  const selectedVal = `Array.prototype.filter` +
-    `.call($event.target.options,function(o){return o.selected})` +
-    `.map(function(o){var val = "_value" in o ? o._value : o.value;` +
-    `return ${number ? '_n(val)' : 'val'}})`;
-
-  const assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
-  let code = `var $$selectedVal = ${selectedVal};`;
-  code = `${code} ${genAssignmentCode(value, assignment)}`;
-  addHandler(el, 'change', code, null, true);
-}
-
-function genDefaultModel (
-  el,
-  value,
-  modifiers
-) {
-  const type = el.attrsMap.type;
-
-  // warn if v-bind:value conflicts with v-model
-  // except for inputs with v-bind:type
-  {
-    const value = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    const typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
-    if (value && !typeBinding) {
-      const binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
-      warn$1(
-        `${binding}="${value}" conflicts with v-model on the same element ` +
-        'because the latter already expands to a value binding internally',
-        el.rawAttrsMap[binding]
-      );
-    }
-  }
-
-  const { lazy, number, trim } = modifiers || {};
-  const needCompositionGuard = !lazy && type !== 'range';
-  const event = lazy
-    ? 'change'
-    : type === 'range'
-      ? RANGE_TOKEN
-      : 'input';
-
-  let valueExpression = '$event.target.value';
-  if (trim) {
-    valueExpression = `$event.target.value.trim()`;
-  }
-  if (number) {
-    valueExpression = `_n(${valueExpression})`;
-  }
-
-  let 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
-    const 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];
-  }
-}
-
-let target$1;
-
-function createOnceHandler$1 (event, handler, capture) {
-  const _target = target$1; // save current target element in closure
-  return function onceHandler () {
-    const 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.
-const 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) {
-    const attachedTimestamp = currentFlushTimestamp;
-    const 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 ||
-        // #9462 bail for iOS 9 bug: event.timeStamp is 0 after history.pushState
-        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, 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
-  }
-  const on = vnode.data.on || {};
-  const 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
-};
-
-/*  */
-
-let svgContainer;
-
-function updateDOMProps (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
-    return
-  }
-  let key, cur;
-  const elm = vnode.elm;
-  const oldProps = oldVnode.data.domProps || {};
-  let 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 (isUndef(props[key])) {
-      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]);
-      }
-    }
-
-    // skip the update if old and new VDOM state is the same.
-    // the only exception is `value` where the DOM value may be temporarily
-    // out of sync with VDOM state due to focus, composition and modifiers.
-    // This also covers #4521 by skipping the unnecesarry `checked` update.
-    if (key !== 'value' && cur === oldProps[key]) {
-      continue
-    }
-
-    if (key === 'value') {
-      // 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
-      const 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>`;
-      const svg = svgContainer.firstChild;
-      while (elm.firstChild) {
-        elm.removeChild(elm.firstChild);
-      }
-      while (svg.firstChild) {
-        elm.appendChild(svg.firstChild);
-      }
-    } else {
-      elm[key] = cur;
-    }
-  }
-}
-
-// 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
-  let 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) {
-  const value = elm.value;
-  const 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
-};
-
-/*  */
-
-const parseStyleText = cached(function (cssText) {
-  const res = {};
-  const listDelimiter = /;(?![^(]*\))/g;
-  const propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      const 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) {
-  const 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) {
-  const res = {};
-  let styleData;
-
-  if (checkChild) {
-    let 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);
-  }
-
-  let parentNode = vnode;
-  while ((parentNode = parentNode.parent)) {
-    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-      extend(res, styleData);
-    }
-  }
-  return res
-}
-
-/*  */
-
-const cssVarRE = /^--/;
-const importantRE = /\s*!important$/;
-const setProp = (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 {
-    const 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 (let i = 0, len = val.length; i < len; i++) {
-        el.style[normalizedName] = val[i];
-      }
-    } else {
-      el.style[normalizedName] = val;
-    }
-  }
-};
-
-const vendorNames = ['Webkit', 'Moz', 'ms'];
-
-let emptyStyle;
-const normalize = cached(function (prop) {
-  emptyStyle = emptyStyle || document.createElement('div').style;
-  prop = camelize(prop);
-  if (prop !== 'filter' && (prop in emptyStyle)) {
-    return prop
-  }
-  const capName = prop.charAt(0).toUpperCase() + prop.slice(1);
-  for (let i = 0; i < vendorNames.length; i++) {
-    const name = vendorNames[i] + capName;
-    if (name in emptyStyle) {
-      return name
-    }
-  }
-});
-
-function updateStyle (oldVnode, vnode) {
-  const data = vnode.data;
-  const oldData = oldVnode.data;
-
-  if (isUndef(data.staticStyle) && isUndef(data.style) &&
-    isUndef(oldData.staticStyle) && isUndef(oldData.style)
-  ) {
-    return
-  }
-
-  let cur, name;
-  const el = vnode.elm;
-  const oldStaticStyle = oldData.staticStyle;
-  const oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
-
-  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
-  const oldStyle = oldStaticStyle || oldStyleBinding;
-
-  const 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;
-
-  const 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
-};
-
-/*  */
-
-const 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(c => el.classList.add(c));
-    } else {
-      el.classList.add(cls);
-    }
-  } else {
-    const 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(c => el.classList.remove(c));
-    } else {
-      el.classList.remove(cls);
-    }
-    if (!el.classList.length) {
-      el.removeAttribute('class');
-    }
-  } else {
-    let cur = ` ${el.getAttribute('class') || ''} `;
-    const 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$$1 === 'object') {
-    const res = {};
-    if (def$$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)
-  }
-}
-
-const autoCssTransition = cached(name => {
-  return {
-    enterClass: `${name}-enter`,
-    enterToClass: `${name}-enter-to`,
-    enterActiveClass: `${name}-enter-active`,
-    leaveClass: `${name}-leave`,
-    leaveToClass: `${name}-leave-to`,
-    leaveActiveClass: `${name}-leave-active`
-  }
-});
-
-const hasTransition = inBrowser && !isIE9;
-const TRANSITION = 'transition';
-const ANIMATION = 'animation';
-
-// Transition property/event sniffing
-let transitionProp = 'transition';
-let transitionEndEvent = 'transitionend';
-let animationProp = 'animation';
-let 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
-const raf = inBrowser
-  ? window.requestAnimationFrame
-    ? window.requestAnimationFrame.bind(window)
-    : setTimeout
-  : /* istanbul ignore next */ fn => fn();
-
-function nextFrame (fn) {
-  raf(() => {
-    raf(fn);
-  });
-}
-
-function addTransitionClass (el, cls) {
-  const 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
-) {
-  const { type, timeout, propCount } = getTransitionInfo(el, expectedType);
-  if (!type) return cb()
-  const event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
-  let ended = 0;
-  const end = () => {
-    el.removeEventListener(event, onEnd);
-    cb();
-  };
-  const onEnd = e => {
-    if (e.target === el) {
-      if (++ended >= propCount) {
-        end();
-      }
-    }
-  };
-  setTimeout(() => {
-    if (ended < propCount) {
-      end();
-    }
-  }, timeout + 1);
-  el.addEventListener(event, onEnd);
-}
-
-const transformRE = /\b(transform|all)(,|$)/;
-
-function getTransitionInfo (el, expectedType) {
-  const styles = window.getComputedStyle(el);
-  // JSDOM may return undefined for transition properties
-  const transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
-  const transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
-  const transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  const animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
-  const animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
-  const animationTimeout = getTimeout(animationDelays, animationDurations);
-
-  let type;
-  let timeout = 0;
-  let 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;
-  }
-  const hasTransform =
-    type === TRANSITION &&
-    transformRE.test(styles[transitionProp + 'Property']);
-  return {
-    type,
-    timeout,
-    propCount,
-    hasTransform
-  }
-}
-
-function getTimeout (delays, durations) {
-  /* istanbul ignore next */
-  while (delays.length < durations.length) {
-    delays = delays.concat(delays);
-  }
-
-  return Math.max.apply(null, durations.map((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) {
-  const el = vnode.elm;
-
-  // call leave callback now
-  if (isDef(el._leaveCb)) {
-    el._leaveCb.cancelled = true;
-    el._leaveCb();
-  }
-
-  const data = resolveTransition(vnode.data.transition);
-  if (isUndef(data)) {
-    return
-  }
-
-  /* istanbul ignore if */
-  if (isDef(el._enterCb) || el.nodeType !== 1) {
-    return
-  }
-
-  const {
-    css,
-    type,
-    enterClass,
-    enterToClass,
-    enterActiveClass,
-    appearClass,
-    appearToClass,
-    appearActiveClass,
-    beforeEnter,
-    enter,
-    afterEnter,
-    enterCancelled,
-    beforeAppear,
-    appear,
-    afterAppear,
-    appearCancelled,
-    duration
-  } = data;
-
-  // 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.
-  let context = activeInstance;
-  let transitionNode = activeInstance.$vnode;
-  while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
-    context = transitionNode.context;
-  }
-
-  const isAppear = !context._isMounted || !vnode.isRootInsert;
-
-  if (isAppear && !appear && appear !== '') {
-    return
-  }
-
-  const startClass = isAppear && appearClass
-    ? appearClass
-    : enterClass;
-  const activeClass = isAppear && appearActiveClass
-    ? appearActiveClass
-    : enterActiveClass;
-  const toClass = isAppear && appearToClass
-    ? appearToClass
-    : enterToClass;
-
-  const beforeEnterHook = isAppear
-    ? (beforeAppear || beforeEnter)
-    : beforeEnter;
-  const enterHook = isAppear
-    ? (typeof appear === 'function' ? appear : enter)
-    : enter;
-  const afterEnterHook = isAppear
-    ? (afterAppear || afterEnter)
-    : afterEnter;
-  const enterCancelledHook = isAppear
-    ? (appearCancelled || enterCancelled)
-    : enterCancelled;
-
-  const explicitEnterDuration = toNumber(
-    isObject(duration)
-      ? duration.enter
-      : duration
-  );
-
-  if (explicitEnterDuration != null) {
-    checkDuration(explicitEnterDuration, 'enter', vnode);
-  }
-
-  const expectsCSS = css !== false && !isIE9;
-  const userWantsControl = getHookArgumentsLength(enterHook);
-
-  const cb = el._enterCb = once(() => {
-    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', () => {
-      const parent = el.parentNode;
-      const 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(() => {
-      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) {
-  const el = vnode.elm;
-
-  // call enter callback now
-  if (isDef(el._enterCb)) {
-    el._enterCb.cancelled = true;
-    el._enterCb();
-  }
-
-  const data = resolveTransition(vnode.data.transition);
-  if (isUndef(data) || el.nodeType !== 1) {
-    return rm()
-  }
-
-  /* istanbul ignore if */
-  if (isDef(el._leaveCb)) {
-    return
-  }
-
-  const {
-    css,
-    type,
-    leaveClass,
-    leaveToClass,
-    leaveActiveClass,
-    beforeLeave,
-    leave,
-    afterLeave,
-    leaveCancelled,
-    delayLeave,
-    duration
-  } = data;
-
-  const expectsCSS = css !== false && !isIE9;
-  const userWantsControl = getHookArgumentsLength(leave);
-
-  const explicitLeaveDuration = toNumber(
-    isObject(duration)
-      ? duration.leave
-      : duration
-  );
-
-  if (isDef(explicitLeaveDuration)) {
-    checkDuration(explicitLeaveDuration, 'leave', vnode);
-  }
-
-  const cb = el._leaveCb = once(() => {
-    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(() => {
-        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
-  }
-  const 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 (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.
-const modules = platformModules.concat(baseModules);
-
-const patch = createPatchFunction({ nodeOps, 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', () => {
-    const el = document.activeElement;
-    if (el && el.vmodel) {
-      trigger(el, 'input');
-    }
-  });
-}
-
-const directive = {
-  inserted (el, binding, vnode, oldVnode) {
-    if (vnode.tag === 'select') {
-      // #6903
-      if (oldVnode.elm && !oldVnode.elm._vOptions) {
-        mergeVNodeHook(vnode, 'postpatch', () => {
-          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 (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.
-      const prevOptions = el._vOptions;
-      const curOptions = el._vOptions = [].map.call(el.options, getValue);
-      if (curOptions.some((o, i) => !looseEqual(o, prevOptions[i]))) {
-        // trigger change event if
-        // no matching option found for at least one value
-        const needReset = el.multiple
-          ? binding.value.some(v => 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(() => {
-      actuallySetSelected(el, binding, vm);
-    }, 0);
-  }
-}
-
-function actuallySetSelected (el, binding, vm) {
-  const value = binding.value;
-  const 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
-  }
-  let selected, option;
-  for (let 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(o => !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) {
-  const 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 (el, { value }, vnode) {
-    vnode = locateNode(vnode);
-    const transition$$1 = vnode.data && vnode.data.transition;
-    const originalDisplay = el.__vOriginalDisplay =
-      el.style.display === 'none' ? '' : el.style.display;
-    if (value && transition$$1) {
-      vnode.data.show = true;
-      enter(vnode, () => {
-        el.style.display = originalDisplay;
-      });
-    } else {
-      el.style.display = value ? originalDisplay : 'none';
-    }
-  },
-
-  update (el, { value, oldValue }, vnode) {
-    /* istanbul ignore if */
-    if (!value === !oldValue) return
-    vnode = locateNode(vnode);
-    const transition$$1 = vnode.data && vnode.data.transition;
-    if (transition$$1) {
-      vnode.data.show = true;
-      if (value) {
-        enter(vnode, () => {
-          el.style.display = el.__vOriginalDisplay;
-        });
-      } else {
-        leave(vnode, () => {
-          el.style.display = 'none';
-        });
-      }
-    } else {
-      el.style.display = value ? el.__vOriginalDisplay : 'none';
-    }
-  },
-
-  unbind (
-    el,
-    binding,
-    vnode,
-    oldVnode,
-    isDestroy
-  ) {
-    if (!isDestroy) {
-      el.style.display = el.__vOriginalDisplay;
-    }
-  }
-};
-
-var platformDirectives = {
-  model: directive,
-  show
-};
-
-/*  */
-
-const 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) {
-  const compOptions = vnode && vnode.componentOptions;
-  if (compOptions && compOptions.Ctor.options.abstract) {
-    return getRealChild(getFirstComponentChild(compOptions.children))
-  } else {
-    return vnode
-  }
-}
-
-function extractTransitionData (comp) {
-  const data = {};
-  const options = comp.$options;
-  // props
-  for (const key in options.propsData) {
-    data[key] = comp[key];
-  }
-  // events.
-  // extract listeners and pass them directly to the transition methods
-  const listeners = options._parentListeners;
-  for (const key in listeners) {
-    data[camelize(key)] = listeners[key];
-  }
-  return data
-}
-
-function placeholder (h, rawChild) {
-  if (/\d-keep-alive$/.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
-}
-
-const isNotTextNode = (c) => c.tag || isAsyncPlaceholder(c);
-
-const isVShowDirective = d => d.name === 'show';
-
-var Transition = {
-  name: 'transition',
-  props: transitionProps,
-  abstract: true,
-
-  render (h) {
-    let 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
-      );
-    }
-
-    const mode = this.mode;
-
-    // warn invalid mode
-    if (mode && mode !== 'in-out' && mode !== 'out-in'
-    ) {
-      warn(
-        'invalid <transition> mode: ' + mode,
-        this.$parent
-      );
-    }
-
-    const rawChild = children[0];
-
-    // if this is a component root node and the component's
-    // parent container node also has transition, skip.
-    if (hasParentTransition(this.$vnode)) {
-      return rawChild
-    }
-
-    // apply transition data to child
-    // use getRealChild() to ignore abstract components e.g. keep-alive
-    const 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.
-    const id = `__transition-${this._uid}-`;
-    child.key = child.key == null
-      ? child.isComment
-        ? id + 'comment'
-        : id + child.tag
-      : isPrimitive(child.key)
-        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
-        : child.key;
-
-    const data = (child.data || (child.data = {})).transition = extractTransitionData(this);
-    const oldRawChild = this._vnode;
-    const oldChild = getRealChild(oldRawChild);
-
-    // mark v-show
-    // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
-      child.data.show = true;
-    }
-
-    if (
-      oldChild &&
-      oldChild.data &&
-      !isSameChild(child, oldChild) &&
-      !isAsyncPlaceholder(oldChild) &&
-      // #6687 component root is a comment node
-      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
-    ) {
-      // replace old child transition data with fresh one
-      // important for dynamic transitions!
-      const oldData = oldChild.data.transition = extend({}, data);
-      // handle transition mode
-      if (mode === 'out-in') {
-        // return placeholder node and queue update when leave finishes
-        this._leaving = true;
-        mergeVNodeHook(oldData, 'afterLeave', () => {
-          this._leaving = false;
-          this.$forceUpdate();
-        });
-        return placeholder(h, rawChild)
-      } else if (mode === 'in-out') {
-        if (isAsyncPlaceholder(child)) {
-          return oldRawChild
-        }
-        let delayedLeave;
-        const performLeave = () => { delayedLeave(); };
-        mergeVNodeHook(data, 'afterEnter', performLeave);
-        mergeVNodeHook(data, 'enterCancelled', performLeave);
-        mergeVNodeHook(oldData, 'delayLeave', leave => { delayedLeave = leave; });
-      }
-    }
-
-    return rawChild
-  }
-};
-
-/*  */
-
-const props = extend({
-  tag: String,
-  moveClass: String
-}, transitionProps);
-
-delete props.mode;
-
-var TransitionGroup = {
-  props,
-
-  beforeMount () {
-    const update = this._update;
-    this._update = (vnode, hydrating) => {
-      const restoreActiveInstance = setActiveInstance(this);
-      // force removing pass
-      this.__patch__(
-        this._vnode,
-        this.kept,
-        false, // hydrating
-        true // removeOnly (!important, avoids unnecessary moves)
-      );
-      this._vnode = this.kept;
-      restoreActiveInstance();
-      update.call(this, vnode, hydrating);
-    };
-  },
-
-  render (h) {
-    const tag = this.tag || this.$vnode.data.tag || 'span';
-    const map = Object.create(null);
-    const prevChildren = this.prevChildren = this.children;
-    const rawChildren = this.$slots.default || [];
-    const children = this.children = [];
-    const transitionData = extractTransitionData(this);
-
-    for (let i = 0; i < rawChildren.length; i++) {
-      const 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 {
-          const opts = c.componentOptions;
-          const name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
-          warn(`<transition-group> children must be keyed: <${name}>`);
-        }
-      }
-    }
-
-    if (prevChildren) {
-      const kept = [];
-      const removed = [];
-      for (let i = 0; i < prevChildren.length; i++) {
-        const c = prevChildren[i];
-        c.data.transition = transitionData;
-        c.data.pos = c.elm.getBoundingClientRect();
-        if (map[c.key]) {
-          kept.push(c);
-        } else {
-          removed.push(c);
-        }
-      }
-      this.kept = h(tag, null, kept);
-      this.removed = removed;
-    }
-
-    return h(tag, null, children)
-  },
-
-  updated () {
-    const children = this.prevChildren;
-    const 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
-    // $flow-disable-line
-    this._reflow = document.body.offsetHeight;
-
-    children.forEach((c) => {
-      if (c.data.moved) {
-        const el = c.elm;
-        const s = el.style;
-        addTransitionClass(el, moveClass);
-        s.transform = s.WebkitTransform = s.transitionDuration = '';
-        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
-          if (e && e.target !== el) {
-            return
-          }
-          if (!e || /transform$/.test(e.propertyName)) {
-            el.removeEventListener(transitionEndEvent, cb);
-            el._moveCb = null;
-            removeTransitionClass(el, moveClass);
-          }
-        });
-      }
-    });
-  },
-
-  methods: {
-    hasMove (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.
-      const clone = el.cloneNode();
-      if (el._transitionClasses) {
-        el._transitionClasses.forEach((cls) => { removeClass(clone, cls); });
-      }
-      addClass(clone, moveClass);
-      clone.style.display = 'none';
-      this.$el.appendChild(clone);
-      const info = getTransitionInfo(clone);
-      this.$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) {
-  const oldPos = c.data.pos;
-  const newPos = c.data.newPos;
-  const dx = oldPos.left - newPos.left;
-  const dy = oldPos.top - newPos.top;
-  if (dx || dy) {
-    c.data.moved = true;
-    const s = c.elm.style;
-    s.transform = s.WebkitTransform = `translate(${dx}px,${dy}px)`;
-    s.transitionDuration = '0s';
-  }
-}
-
-var platformComponents = {
-  Transition,
-  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.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && inBrowser ? query(el) : undefined;
-  return mountComponent(this, el, hydrating)
-};
-
-// devtools global hook
-/* istanbul ignore next */
-if (inBrowser) {
-  setTimeout(() => {
-    if (config.devtools) {
-      if (devtools) {
-        devtools.emit('init', Vue);
-      } else {
-        console[console.info ? 'info' : 'log'](
-          'Download the Vue Devtools extension for a better development experience:\n' +
-          'https://github.com/vuejs/vue-devtools'
-        );
-      }
-    }
-    if (config.productionTip !== false &&
-      typeof console !== 'undefined'
-    ) {
-      console[console.info ? 'info' : 'log'](
-        `You are running Vue in development mode.\n` +
-        `Make sure to turn on production mode when deploying for production.\n` +
-        `See more tips at https://vuejs.org/guide/deployment.html`
-      );
-    }
-  }, 0);
-}
-
-/*  */
-
-const defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
-const regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
-
-const buildRegex = cached(delimiters => {
-  const open = delimiters[0].replace(regexEscapeRE, '\\$&');
-  const close = delimiters[1].replace(regexEscapeRE, '\\$&');
-  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
-});
-
-
-
-function parseText (
-  text,
-  delimiters
-) {
-  const tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
-  if (!tagRE.test(text)) {
-    return
-  }
-  const tokens = [];
-  const rawTokens = [];
-  let lastIndex = tagRE.lastIndex = 0;
-  let 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
-    const exp = parseFilters(match[1].trim());
-    tokens.push(`_s(${exp})`);
-    rawTokens.push({ '@binding': exp });
-    lastIndex = index + match[0].length;
-  }
-  if (lastIndex < text.length) {
-    rawTokens.push(tokenValue = text.slice(lastIndex));
-    tokens.push(JSON.stringify(tokenValue));
-  }
-  return {
-    expression: tokens.join('+'),
-    tokens: rawTokens
-  }
-}
-
-/*  */
-
-function transformNode (el, options) {
-  const warn = options.warn || baseWarn;
-  const staticClass = getAndRemoveAttr(el, 'class');
-  if (staticClass) {
-    const res = parseText(staticClass, options.delimiters);
-    if (res) {
-      warn(
-        `class="${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);
-  }
-  const classBinding = getBindingAttr(el, 'class', false /* getStatic */);
-  if (classBinding) {
-    el.classBinding = classBinding;
-  }
-}
-
-function genData (el) {
-  let data = '';
-  if (el.staticClass) {
-    data += `staticClass:${el.staticClass},`;
-  }
-  if (el.classBinding) {
-    data += `class:${el.classBinding},`;
-  }
-  return data
-}
-
-var klass$1 = {
-  staticKeys: ['staticClass'],
-  transformNode,
-  genData
-};
-
-/*  */
-
-function transformNode$1 (el, options) {
-  const warn = options.warn || baseWarn;
-  const staticStyle = getAndRemoveAttr(el, 'style');
-  if (staticStyle) {
-    /* istanbul ignore if */
-    {
-      const res = parseText(staticStyle, options.delimiters);
-      if (res) {
-        warn(
-          `style="${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));
-  }
-
-  const styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
-  if (styleBinding) {
-    el.styleBinding = styleBinding;
-  }
-}
-
-function genData$1 (el) {
-  let data = '';
-  if (el.staticStyle) {
-    data += `staticStyle:${el.staticStyle},`;
-  }
-  if (el.styleBinding) {
-    data += `style:(${el.styleBinding}),`;
-  }
-  return data
-}
-
-var style$1 = {
-  staticKeys: ['staticStyle'],
-  transformNode: transformNode$1,
-  genData: genData$1
-};
-
-/*  */
-
-let decoder;
-
-var he = {
-  decode (html) {
-    decoder = decoder || document.createElement('div');
-    decoder.innerHTML = html;
-    return decoder.textContent
-  }
-};
-
-/*  */
-
-const 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)
-const 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
-const 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
-const attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-const dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-const ncname = `[a-zA-Z_][\\-\\.0-9_a-zA-Z${unicodeLetters}]*`;
-const qnameCapture = `((?:${ncname}\\:)?${ncname})`;
-const startTagOpen = new RegExp(`^<${qnameCapture}`);
-const startTagClose = /^\s*(\/?)>/;
-const endTag = new RegExp(`^<\\/${qnameCapture}[^>]*>`);
-const doctype = /^<!DOCTYPE [^>]+>/i;
-// #7298: escape - to avoid being pased as HTML comment when inlined in page
-const comment = /^<!\--/;
-const conditionalComment = /^<!\[/;
-
-// Special Elements (can contain anything)
-const isPlainTextElement = makeMap('script,style,textarea', true);
-const reCache = {};
-
-const decodingMap = {
-  '&lt;': '<',
-  '&gt;': '>',
-  '&quot;': '"',
-  '&amp;': '&',
-  '&#10;': '\n',
-  '&#9;': '\t',
-  '&#39;': "'"
-};
-const encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
-const encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
-
-// #5992
-const isIgnoreNewlineTag = makeMap('pre,textarea', true);
-const shouldIgnoreFirstNewline = (tag, html) => tag && isIgnoreNewlineTag(tag) && html[0] === '\n';
-
-function decodeAttr (value, shouldDecodeNewlines) {
-  const re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
-  return value.replace(re, match => decodingMap[match])
-}
-
-function parseHTML (html, options) {
-  const stack = [];
-  const expectHTML = options.expectHTML;
-  const isUnaryTag$$1 = options.isUnaryTag || no;
-  const canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
-  let index = 0;
-  let last, lastTag;
-  while (html) {
-    last = html;
-    // Make sure we're not in a plaintext content element like script/style
-    if (!lastTag || !isPlainTextElement(lastTag)) {
-      let textEnd = html.indexOf('<');
-      if (textEnd === 0) {
-        // Comment:
-        if (comment.test(html)) {
-          const 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)) {
-          const conditionalEnd = html.indexOf(']>');
-
-          if (conditionalEnd >= 0) {
-            advance(conditionalEnd + 2);
-            continue
-          }
-        }
-
-        // Doctype:
-        const doctypeMatch = html.match(doctype);
-        if (doctypeMatch) {
-          advance(doctypeMatch[0].length);
-          continue
-        }
-
-        // End tag:
-        const endTagMatch = html.match(endTag);
-        if (endTagMatch) {
-          const curIndex = index;
-          advance(endTagMatch[0].length);
-          parseEndTag(endTagMatch[1], curIndex, index);
-          continue
-        }
-
-        // Start tag:
-        const startTagMatch = parseStartTag();
-        if (startTagMatch) {
-          handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
-            advance(1);
-          }
-          continue
-        }
-      }
-
-      let text, rest, next;
-      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 {
-      let endTagLength = 0;
-      const stackedTag = lastTag.toLowerCase();
-      const reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
-      const rest = 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, '$1');
-        }
-        if (shouldIgnoreFirstNewline(stackedTag, text)) {
-          text = text.slice(1);
-        }
-        if (options.chars) {
-          options.chars(text);
-        }
-        return ''
-      });
-      index += html.length - rest.length;
-      html = rest;
-      parseEndTag(stackedTag, index - endTagLength, index);
-    }
-
-    if (html === last) {
-      options.chars && options.chars(html);
-      if (!stack.length && options.warn) {
-        options.warn(`Mal-formatted tag at end of template: "${html}"`, { start: index + html.length });
-      }
-      break
-    }
-  }
-
-  // Clean up any remaining tags
-  parseEndTag();
-
-  function advance (n) {
-    index += n;
-    html = html.substring(n);
-  }
-
-  function parseStartTag () {
-    const start = html.match(startTagOpen);
-    if (start) {
-      const match = {
-        tagName: start[1],
-        attrs: [],
-        start: index
-      };
-      advance(start[0].length);
-      let 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) {
-    const tagName = match.tagName;
-    const unarySlash = match.unarySlash;
-
-    if (expectHTML) {
-      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
-        parseEndTag(lastTag);
-      }
-      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
-        parseEndTag(tagName);
-      }
-    }
-
-    const unary = isUnaryTag$$1(tagName) || !!unarySlash;
-
-    const l = match.attrs.length;
-    const attrs = new Array(l);
-    for (let i = 0; i < l; i++) {
-      const args = match.attrs[i];
-      const value = args[3] || args[4] || args[5] || '';
-      const 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) {
-    let 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 (let 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 }
-          );
-        }
-        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);
-      }
-    }
-  }
-}
-
-/*  */
-
-const onRE = /^@|^v-on:/;
-const dirRE = /^v-|^@|^:/;
-const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
-const forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
-const stripParensRE = /^\(|\)$/g;
-const dynamicArgRE = /^\[.*\]$/;
-
-const argRE = /:(.*)$/;
-const bindRE = /^:|^\.|^v-bind:/;
-const modifierRE = /\.[^.]+/g;
-
-const slotRE = /^v-slot(:|$)|^#/;
-
-const lineBreakRE = /[\r\n]/;
-const whitespaceRE$1 = /\s+/g;
-
-const invalidAttributeRE = /[\s"'<>\/=]/;
-
-const decodeHTMLCached = cached(he.decode);
-
-const emptySlotScopeToken = `_empty_`;
-
-// configurable state
-let warn$2;
-let delimiters;
-let transforms;
-let preTransforms;
-let postTransforms;
-let platformIsPreTag;
-let platformMustUseProp;
-let platformGetTagNamespace;
-let maybeComponent;
-
-function createASTElement (
-  tag,
-  attrs,
-  parent
-) {
-  return {
-    type: 1,
-    tag,
-    attrsList: attrs,
-    attrsMap: makeAttrsMap(attrs),
-    rawAttrsMap: {},
-    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;
-  const isReservedTag = options.isReservedTag || no;
-  maybeComponent = (el) => !!el.component || !isReservedTag(el.tag);
-
-  transforms = pluckModuleFunction(options.modules, 'transformNode');
-  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
-  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
-
-  delimiters = options.delimiters;
-
-  const stack = [];
-  const preserveWhitespace = options.preserveWhitespace !== false;
-  const whitespaceOption = options.whitespace;
-  let root;
-  let currentParent;
-  let inVPre = false;
-  let inPre = false;
-  let 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.
-          const 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(c => !(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 (let i = 0; i < postTransforms.length; i++) {
-      postTransforms[i](element, options);
-    }
-  }
-
-  function trimEndingWhitespace (el) {
-    // remove trailing whitespace node
-    if (!inPre) {
-      let 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 (tag, attrs, unary, start) {
-      // check namespace.
-      // inherit parent ns if there is one
-      const ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
-
-      // handle IE svg bug
-      /* istanbul ignore if */
-      if (isIE && ns === 'svg') {
-        attrs = guardIESVGBug(attrs);
-      }
-
-      let element = createASTElement(tag, attrs, currentParent);
-      if (ns) {
-        element.ns = ns;
-      }
-
-      {
-        if (options.outputSourceRange) {
-          element.start = start;
-          element.rawAttrsMap = element.attrsList.reduce((cumulated, attr) => {
-            cumulated[attr.name] = attr;
-            return cumulated
-          }, {});
-        }
-        attrs.forEach(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 (let 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 (tag, start, end) {
-      const element = stack[stack.length - 1];
-      // pop stack
-      stack.length -= 1;
-      currentParent = stack[stack.length - 1];
-      if (options.outputSourceRange) {
-        element.end = end;
-      }
-      closeElement(element);
-    },
-
-    chars (text, start, end) {
-      if (!currentParent) {
-        {
-          if (text === template) {
-            warnOnce(
-              'Component template requires a root element, rather than just text.',
-              { start }
-            );
-          } else if ((text = text.trim())) {
-            warnOnce(
-              `text "${text}" outside root element will be ignored.`,
-              { start }
-            );
-          }
-        }
-        return
-      }
-      // IE textarea placeholder bug
-      /* istanbul ignore if */
-      if (isIE &&
-        currentParent.tag === 'textarea' &&
-        currentParent.attrsMap.placeholder === text
-      ) {
-        return
-      }
-      const 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 (whitespaceOption === 'condense') {
-          // condense consecutive whitespaces into single space
-          text = text.replace(whitespaceRE$1, ' ');
-        }
-        let res;
-        let child;
-        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          child = {
-            type: 2,
-            expression: res.expression,
-            tokens: res.tokens,
-            text
-          };
-        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          child = {
-            type: 3,
-            text
-          };
-        }
-        if (child) {
-          if (options.outputSourceRange) {
-            child.start = start;
-            child.end = end;
-          }
-          children.push(child);
-        }
-      }
-    },
-    comment (text, start, end) {
-      // adding anyting as a sibling to the root node is forbidden
-      // comments should still be allowed, but ignored
-      if (currentParent) {
-        const child = {
-          type: 3,
-          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) {
-  const list = el.attrsList;
-  const len = list.length;
-  if (len) {
-    const attrs = el.attrs = new Array(len);
-    for (let 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 (let i = 0; i < transforms.length; i++) {
-    element = transforms[i](element, options) || element;
-  }
-  processAttrs(element);
-  return element
-}
-
-function processKey (el) {
-  const 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) {
-        const iterator = el.iterator2 || el.iterator1;
-        const 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) {
-  const ref = getBindingAttr(el, 'ref');
-  if (ref) {
-    el.ref = ref;
-    el.refInFor = checkInFor(el);
-  }
-}
-
-function processFor (el) {
-  let exp;
-  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-    const res = parseFor(exp);
-    if (res) {
-      extend(el, res);
-    } else {
-      warn$2(
-        `Invalid v-for expression: ${exp}`,
-        el.rawAttrsMap['v-for']
-      );
-    }
-  }
-}
-
-
-
-function parseFor (exp) {
-  const inMatch = exp.match(forAliasRE);
-  if (!inMatch) return
-  const res = {};
-  res.for = inMatch[2].trim();
-  const alias = inMatch[1].trim().replace(stripParensRE, '');
-  const 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) {
-  const 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;
-    }
-    const elseif = getAndRemoveAttr(el, 'v-else-if');
-    if (elseif) {
-      el.elseif = elseif;
-    }
-  }
-}
-
-function processIfConditions (el, parent) {
-  const 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) {
-  let 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) {
-  const 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) {
-  let 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"
-  const 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>
-      const 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 the component`,
-              el
-            );
-          }
-        }
-        const { name, dynamic } = getSlotName(slotBinding);
-        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
-      const slotBinding = getAndRemoveAttrByRegex(el, slotRE);
-      if (slotBinding) {
-        {
-          if (!maybeComponent(el)) {
-            warn$2(
-              `v-slot can only be used on components or <template>.`,
-              slotBinding
-            );
-          }
-          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
-            );
-          }
-        }
-        // add the component's children to its default slot
-        const slots = el.scopedSlots || (el.scopedSlots = {});
-        const { name, dynamic } = getSlotName(slotBinding);
-        const slotContainer = slots[name] = createASTElement('template', [], el);
-        slotContainer.slotTarget = name;
-        slotContainer.slotTargetDynamic = dynamic;
-        slotContainer.children = el.children.filter((c) => {
-          if (!c.slotScope) {
-            c.parent = slotContainer;
-            return true
-          }
-        });
-        slotContainer.slotScope = slotBinding.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) {
-  let 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) {
-  let binding;
-  if ((binding = getBindingAttr(el, 'is'))) {
-    el.component = binding;
-  }
-  if (getAndRemoveAttr(el, 'inline-template') != null) {
-    el.inlineTemplate = true;
-  }
-}
-
-function processAttrs (el) {
-  const list = el.attrsList;
-  let 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
-        const argMatch = name.match(argRE);
-        let 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
-      {
-        const 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) {
-  let parent = el;
-  while (parent) {
-    if (parent.for !== undefined) {
-      return true
-    }
-    parent = parent.parent;
-  }
-  return false
-}
-
-function parseModifiers (name) {
-  const match = name.match(modifierRE);
-  if (match) {
-    const ret = {};
-    match.forEach(m => { ret[m.slice(1)] = true; });
-    return ret
-  }
-}
-
-function makeAttrsMap (attrs) {
-  const map = {};
-  for (let 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'
-    ))
-  )
-}
-
-const ieNSBug = /^xmlns:NS\d+/;
-const ieNSPrefix = /^NS\d+:/;
-
-/* istanbul ignore next */
-function guardIESVGBug (attrs) {
-  const res = [];
-  for (let i = 0; i < attrs.length; i++) {
-    const attr = attrs[i];
-    if (!ieNSBug.test(attr.name)) {
-      attr.name = attr.name.replace(ieNSPrefix, '');
-      res.push(attr);
-    }
-  }
-  return res
-}
-
-function checkForAliasModel (el, value) {
-  let _el = el;
-  while (_el) {
-    if (_el.for && _el.alias === value) {
-      warn$2(
-        `<${el.tag} v-model="${value}">: ` +
-        `You are binding v-model directly to a v-for iteration alias. ` +
-        `This will not be able to modify the v-for source array because ` +
-        `writing to the alias is like modifying a function local variable. ` +
-        `Consider using an array of objects and use v-model on an object property instead.`,
-        el.rawAttrsMap['v-model']
-      );
-    }
-    _el = _el.parent;
-  }
-}
-
-/*  */
-
-function preTransformNode (el, options) {
-  if (el.tag === 'input') {
-    const map = el.attrsMap;
-    if (!map['v-model']) {
-      return
-    }
-
-    let typeBinding;
-    if (map[':type'] || map['v-bind:type']) {
-      typeBinding = getBindingAttr(el, 'type');
-    }
-    if (!map.type && !typeBinding && map['v-bind']) {
-      typeBinding = `(${map['v-bind']}).type`;
-    }
-
-    if (typeBinding) {
-      const ifCondition = getAndRemoveAttr(el, 'v-if', true);
-      const ifConditionExtra = ifCondition ? `&&(${ifCondition})` : ``;
-      const hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
-      const elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
-      // 1. checkbox
-      const branch0 = cloneASTElement(el);
-      // process for on the main node
-      processFor(branch0);
-      addRawAttr(branch0, 'type', 'checkbox');
-      processElement(branch0, options);
-      branch0.processed = true; // prevent it from double-processed
-      branch0.if = `(${typeBinding})==='checkbox'` + ifConditionExtra;
-      addIfCondition(branch0, {
-        exp: branch0.if,
-        block: branch0
-      });
-      // 2. add radio else-if condition
-      const 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
-      const 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
-};
-
-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,
-  text,
-  html
-};
-
-/*  */
-
-const baseOptions = {
-  expectHTML: true,
-  modules: modules$1,
-  directives: directives$1,
-  isPreTag,
-  isUnaryTag,
-  mustUseProp,
-  canBeLeftOpenTag,
-  isReservedTag,
-  getTagNamespace,
-  staticKeys: genStaticKeys(modules$1)
-};
-
-/*  */
-
-let isStaticKey;
-let isPlatformReservedTag;
-
-const 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 (let i = 0, l = node.children.length; i < l; i++) {
-      const child = node.children[i];
-      markStatic$1(child);
-      if (!child.static) {
-        node.static = false;
-      }
-    }
-    if (node.ifConditions) {
-      for (let i = 1, l = node.ifConditions.length; i < l; i++) {
-        const block = node.ifConditions[i].block;
-        markStatic$1(block);
-        if (!block.static) {
-          node.static = false;
-        }
-      }
-    }
-  }
-}
-
-function markStaticRoots (node, isInFor) {
-  if (node.type === 1) {
-    if (node.static || node.once) {
-      node.staticInFor = isInFor;
-    }
-    // For a node to qualify as a static root, it should have children that
-    // are not just static text. Otherwise the cost of hoisting out will
-    // outweigh the benefits and it's better off to just always render it fresh.
-    if (node.static && node.children.length && !(
-      node.children.length === 1 &&
-      node.children[0].type === 3
-    )) {
-      node.staticRoot = true;
-      return
-    } else {
-      node.staticRoot = false;
-    }
-    if (node.children) {
-      for (let i = 0, l = node.children.length; i < l; i++) {
-        markStaticRoots(node.children[i], isInFor || !!node.for);
-      }
-    }
-    if (node.ifConditions) {
-      for (let i = 1, l = node.ifConditions.length; i < l; i++) {
-        markStaticRoots(node.ifConditions[i].block, isInFor);
-      }
-    }
-  }
-}
-
-function isStatic (node) {
-  if (node.type === 2) { // expression
-    return false
-  }
-  if (node.type === 3) { // text
-    return true
-  }
-  return !!(node.pre || (
-    !node.hasBindings && // no dynamic bindings
-    !node.if && !node.for && // not v-if or v-for or v-else
-    !isBuiltInTag(node.tag) && // not a built-in
-    isPlatformReservedTag(node.tag) && // not a component
-    !isDirectChildOfTemplateFor(node) &&
-    Object.keys(node).every(isStaticKey)
-  ))
-}
-
-function isDirectChildOfTemplateFor (node) {
-  while (node.parent) {
-    node = node.parent;
-    if (node.tag !== 'template') {
-      return false
-    }
-    if (node.for) {
-      return true
-    }
-  }
-  return false
-}
-
-/*  */
-
-const fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-const fnInvokeRE = /\([^)]*?\);*$/;
-const simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
-
-// KeyboardEvent.keyCode aliases
-const keyCodes = {
-  esc: 27,
-  tab: 9,
-  enter: 13,
-  space: 32,
-  up: 38,
-  left: 37,
-  right: 39,
-  down: 40,
-  'delete': [8, 46]
-};
-
-// KeyboardEvent.key aliases
-const keyNames = {
-  // #7880: IE11 and Edge use `Esc` for Escape key name.
-  esc: ['Esc', 'Escape'],
-  tab: 'Tab',
-  enter: 'Enter',
-  // #9112: IE11 uses `Spacebar` for Space key name.
-  space: [' ', 'Spacebar'],
-  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
-  up: ['Up', 'ArrowUp'],
-  left: ['Left', 'ArrowLeft'],
-  right: ['Right', 'ArrowRight'],
-  down: ['Down', 'ArrowDown'],
-  // #9112: IE11 uses `Del` for Delete key name.
-  'delete': ['Backspace', 'Delete', 'Del']
-};
-
-// #4868: modifiers that prevent the execution of the listener
-// need to explicitly return null so that we can determine whether to remove
-// the listener for .once
-const genGuard = condition => `if(${condition})return null;`;
-
-const 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 && $event.button !== 2`)
-};
-
-function genHandlers (
-  events,
-  isNative
-) {
-  const prefix = isNative ? 'nativeOn:' : 'on:';
-  let staticHandlers = ``;
-  let dynamicHandlers = ``;
-  for (const name in events) {
-    const handlerCode = genHandler(events[name]);
-    if (events[name] && events[name].dynamic) {
-      dynamicHandlers += `${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 `[${handler.map(handler => genHandler(handler)).join(',')}]`
-  }
-
-  const isMethodPath = simplePathRE.test(handler.value);
-  const isFunctionExpression = fnExpRE.test(handler.value);
-  const isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
-
-  if (!handler.modifiers) {
-    if (isMethodPath || isFunctionExpression) {
-      return handler.value
-    }
-    return `function($event){${
-      isFunctionInvocation ? `return ${handler.value}` : handler.value
-    }}` // inline statement
-  } else {
-    let code = '';
-    let genModifierCode = '';
-    const keys = [];
-    for (const key in handler.modifiers) {
-      if (modifierCode[key]) {
-        genModifierCode += modifierCode[key];
-        // left/right
-        if (keyCodes[key]) {
-          keys.push(key);
-        }
-      } else if (key === 'exact') {
-        const modifiers = (handler.modifiers);
-        genModifierCode += genGuard(
-          ['ctrl', 'shift', 'alt', 'meta']
-            .filter(keyModifier => !modifiers[keyModifier])
-            .map(keyModifier => `$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;
-    }
-    const 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')&&` +
-    `${keys.map(genFilterCode).join('&&')})return null;`
-  )
-}
-
-function genFilterCode (key) {
-  const keyVal = parseInt(key, 10);
-  if (keyVal) {
-    return `$event.keyCode!==${keyVal}`
-  }
-  const keyCode = keyCodes[key];
-  const keyName = keyNames[key];
-  return (
-    `_k($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 = (code) => `_g(${code},${dir.value})`;
-}
-
-/*  */
-
-function bind$1 (el, dir) {
-  el.wrapData = (code) => {
-    return `_b(${code},'${el.tag}',${dir.value},${
-      dir.modifiers && dir.modifiers.prop ? 'true' : 'false'
-    }${
-      dir.modifiers && dir.modifiers.sync ? ',true' : ''
-    })`
-  };
-}
-
-/*  */
-
-var baseDirectives = {
-  on,
-  bind: bind$1,
-  cloak: noop
-};
-
-/*  */
-
-
-
-
-
-class CodegenState {
-  
-  
-  
-  
-  
-  
-  
-  
-  
-
-  constructor (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);
-    const isReservedTag = options.isReservedTag || no;
-    this.maybeComponent = (el) => !!el.component || !isReservedTag(el.tag);
-    this.onceId = 0;
-    this.staticRenderFns = [];
-    this.pre = false;
-  }
-}
-
-
-
-function generate (
-  ast,
-  options
-) {
-  const state = new CodegenState(options);
-  const 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
-    let code;
-    if (el.component) {
-      code = genComponent(el.component, el, state);
-    } else {
-      let data;
-      if (!el.plain || (el.pre && state.maybeComponent(el))) {
-        data = genData$2(el, state);
-      }
-
-      const children = el.inlineTemplate ? null : genChildren(el, state, true);
-      code = `_c('${el.tag}'${
-        data ? `,${data}` : '' // data
-      }${
-        children ? `,${children}` : '' // children
-      })`;
-    }
-    // module transforms
-    for (let 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.
-  const 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
-  }${
-    el.staticInFor ? ',true' : ''
-  })`
-}
-
-// v-once
-function genOnce (el, state) {
-  el.onceProcessed = true;
-  if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.staticInFor) {
-    let key = '';
-    let parent = el.parent;
-    while (parent) {
-      if (parent.for) {
-        key = parent.key;
-        break
-      }
-      parent = parent.parent;
-    }
-    if (!key) {
-      state.warn(
-        `v-once can only be used inside v-for that is keyed. `,
-        el.rawAttrsMap['v-once']
-      );
-      return genElement(el, state)
-    }
-    return `_o(${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()'
-  }
-
-  const 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
-) {
-  const exp = el.for;
-  const alias = el.alias;
-  const iterator1 = el.iterator1 ? `,${el.iterator1}` : '';
-  const iterator2 = el.iterator2 ? `,${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$2 (el, state) {
-  let data = '{';
-
-  // directives first.
-  // directives may mutate the el's other properties before they are generated.
-  const dirs = genDirectives(el, state);
-  if (dirs) data += dirs + ',';
-
-  // key
-  if (el.key) {
-    data += `key:${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 (let 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:${
-      el.model.expression
-    }},`;
-  }
-  // inline-template
-  if (el.inlineTemplate) {
-    const inlineTemplate = genInlineTemplate(el, state);
-    if (inlineTemplate) {
-      data += `${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) {
-  const dirs = el.directives;
-  if (!dirs) return
-  let res = 'directives:[';
-  let hasRuntime = false;
-  let i, l, dir, needRuntime;
-  for (i = 0, l = dirs.length; i < l; i++) {
-    dir = dirs[i];
-    needRuntime = true;
-    const 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) {
-  const 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) {
-    const inlineRenderFns = generate(ast, state.options);
-    return `inlineTemplate:{render:function(){${
-      inlineRenderFns.render
-    }},staticRenderFns:[${
-      inlineRenderFns.staticRenderFns.map(code => `function(){${code}}`).join(',')
-    }]}`
-  }
-}
-
-function genScopedSlots (
-  el,
-  slots,
-  state
-) {
-  // by default scoped slots are considered "stable", this allows child
-  // components with only scoped slots to skip forced updates from parent.
-  // but in some cases we have to bail-out of this optimization
-  // for example if the slot contains dynamic names, has v-if or v-for on them...
-  let needsForceUpdate = Object.keys(slots).some(key => {
-    const slot = slots[key];
-    return (
-      slot.slotTargetDynamic ||
-      slot.if ||
-      slot.for ||
-      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
-    )
-  });
-  // OR when it is inside another scoped slot (the reactivity is disconnected)
-  // #9438
-  if (!needsForceUpdate) {
-    let parent = el.parent;
-    while (parent) {
-      if (parent.slotScope && parent.slotScope !== emptySlotScopeToken) {
-        needsForceUpdate = true;
-        break
-      }
-      parent = parent.parent;
-    }
-  }
-
-  return `scopedSlots:_u([${
-    Object.keys(slots).map(key => {
-      return genScopedSlot(slots[key], state)
-    }).join(',')
-  }]${needsForceUpdate ? `,true` : ``})`
-}
-
-function containsSlotChild (el) {
-  if (el.type === 1) {
-    if (el.tag === 'slot') {
-      return true
-    }
-    return el.children.some(containsSlotChild)
-  }
-  return false
-}
-
-function genScopedSlot (
-  el,
-  state
-) {
-  const isLegacySyntax = el.attrsMap['slot-scope'];
-  if (el.if && !el.ifProcessed && !isLegacySyntax) {
-    return genIf(el, state, genScopedSlot, `null`)
-  }
-  if (el.for && !el.forProcessed) {
-    return genFor(el, state, genScopedSlot)
-  }
-  const slotScope = el.slotScope === emptySlotScopeToken
-    ? ``
-    : String(el.slotScope);
-  const fn = `function(${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
-  const reverseProxy = slotScope ? `` : `,proxy:true`;
-  return `{key:${el.slotTarget || `"default"`},fn:${fn}${reverseProxy}}`
-}
-
-function genChildren (
-  el,
-  state,
-  checkSkip,
-  altGenElement,
-  altGenNode
-) {
-  const children = el.children;
-  if (children.length) {
-    const el = children[0];
-    // optimize single v-for
-    if (children.length === 1 &&
-      el.for &&
-      el.tag !== 'template' &&
-      el.tag !== 'slot'
-    ) {
-      const normalizationType = checkSkip
-        ? state.maybeComponent(el) ? `,1` : `,0`
-        : ``;
-      return `${(altGenElement || genElement)(el, state)}${normalizationType}`
-    }
-    const normalizationType = checkSkip
-      ? getNormalizationType(children, state.maybeComponent)
-      : 0;
-    const gen = altGenNode || genNode;
-    return `[${children.map(c => gen(c, state)).join(',')}]${
-      normalizationType ? `,${normalizationType}` : ''
-    }`
-  }
-}
-
-// 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
-) {
-  let res = 0;
-  for (let i = 0; i < children.length; i++) {
-    const el = children[i];
-    if (el.type !== 1) {
-      continue
-    }
-    if (needsNormalization(el) ||
-        (el.ifConditions && el.ifConditions.some(c => needsNormalization(c.block)))) {
-      res = 2;
-      break
-    }
-    if (maybeComponent(el) ||
-        (el.ifConditions && el.ifConditions.some(c => 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) {
-  const slotName = el.slotName || '"default"';
-  const children = genChildren(el, state);
-  let res = `_t(${slotName}${children ? `,${children}` : ''}`;
-  const attrs = el.attrs || el.dynamicAttrs
-    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(attr => ({
-        // slot props are camelized
-        name: camelize(attr.name),
-        value: attr.value,
-        dynamic: attr.dynamic
-      })))
-    : null;
-  const 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
-) {
-  const children = el.inlineTemplate ? null : genChildren(el, state, true);
-  return `_c(${componentName},${genData$2(el, state)}${
-    children ? `,${children}` : ''
-  })`
-}
-
-function genProps (props) {
-  let staticProps = ``;
-  let dynamicProps = ``;
-  for (let i = 0; i < props.length; i++) {
-    const prop = props[i];
-    const value = transformSpecialNewlines(prop.value);
-    if (prop.dynamic) {
-      dynamicProps += `${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
-const 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
-const unaryOperatorsRE = new RegExp('\\b' + (
-  'delete,typeof,void'
-).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
-
-// strip strings in expressions
-const 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 (const name in node.attrsMap) {
-      if (dirRE.test(name)) {
-        const value = node.attrsMap[name];
-        if (value) {
-          const range = node.rawAttrsMap[name];
-          if (name === 'v-for') {
-            checkFor(node, `v-for="${value}"`, warn, range);
-          } else if (onRE.test(name)) {
-            checkEvent(value, `${name}="${value}"`, warn, range);
-          } else {
-            checkExpression(value, `${name}="${value}"`, warn, range);
-          }
-        }
-      }
-    }
-    if (node.children) {
-      for (let i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], warn);
-      }
-    }
-  } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, warn, node);
-  }
-}
-
-function checkEvent (exp, text, warn, range) {
-  const stipped = exp.replace(stripStringRE, '');
-  const keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    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 ${exp}`);
-  } catch (e) {
-    const keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
-    if (keywordMatch) {
-      warn(
-        `avoid using JavaScript keyword as property name: ` +
-        `"${keywordMatch[0]}"\n  Raw expression: ${text.trim()}`,
-        range
-      );
-    } else {
-      warn(
-        `invalid expression: ${e.message} in\n\n` +
-        `    ${exp}\n\n` +
-        `  Raw expression: ${text.trim()}\n`,
-        range
-      );
-    }
-  }
-}
-
-/*  */
-
-const range = 2;
-
-function generateCodeFrame (
-  source,
-  start = 0,
-  end = source.length
-) {
-  const lines = source.split(/\r?\n/);
-  let count = 0;
-  const res = [];
-  for (let i = 0; i < lines.length; i++) {
-    count += lines[i].length + 1;
-    if (count >= start) {
-      for (let j = i - range; j <= i + range || end > count; j++) {
-        if (j < 0 || j >= lines.length) continue
-        res.push(`${j + 1}${repeat(` `, 3 - String(j + 1).length)}|  ${lines[j]}`);
-        const lineLength = lines[j].length;
-        if (j === i) {
-          // push underline
-          const pad = start - (count - lineLength) + 1;
-          const length = end > count ? lineLength - pad : end - start;
-          res.push(`   |  ` + repeat(` `, pad) + repeat(`^`, length));
-        } else if (j > i) {
-          if (end > count) {
-            const length = Math.min(end - count, lineLength);
-            res.push(`   |  ` + repeat(`^`, length));
-          }
-          count += lineLength + 1;
-        }
-      }
-      break
-    }
-  }
-  return res.join('\n')
-}
-
-function repeat (str, n) {
-  let result = '';
-  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, code });
-    return noop
-  }
-}
-
-function createCompileToFunctionFn (compile) {
-  const cache = Object.create(null);
-
-  return function compileToFunctions (
-    template,
-    options,
-    vm
-  ) {
-    options = extend({}, options);
-    const 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
-    const key = options.delimiters
-      ? String(options.delimiters) + template
-      : template;
-    if (cache[key]) {
-      return cache[key]
-    }
-
-    // compile
-    const compiled = compile(template, options);
-
-    // check compilation errors/tips
-    {
-      if (compiled.errors && compiled.errors.length) {
-        if (options.outputSourceRange) {
-          compiled.errors.forEach(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(e => `- ${e}`).join('\n') + '\n',
-            vm
-          );
-        }
-      }
-      if (compiled.tips && compiled.tips.length) {
-        if (options.outputSourceRange) {
-          compiled.tips.forEach(e => tip(e.msg, vm));
-        } else {
-          compiled.tips.forEach(msg => tip(msg, vm));
-        }
-      }
-    }
-
-    // turn code into functions
-    const res = {};
-    const fnGenErrors = [];
-    res.render = createFunction(compiled.render, fnGenErrors);
-    res.staticRenderFns = compiled.staticRenderFns.map(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(({ err, code }) => `${err.toString()} in\n\n${code}\n`).join('\n'),
-          vm
-        );
-      }
-    }
-
-    return (cache[key] = res)
-  }
-}
-
-/*  */
-
-function createCompilerCreator (baseCompile) {
-  return function createCompiler (baseOptions) {
-    function compile (
-      template,
-      options
-    ) {
-      const finalOptions = Object.create(baseOptions);
-      const errors = [];
-      const tips = [];
-
-      let warn = (msg, range, tip) => {
-        (tip ? tips : errors).push(msg);
-      };
-
-      if (options) {
-        if (options.outputSourceRange) {
-          // $flow-disable-line
-          const leadingSpaceLength = template.match(/^\s*/)[0].length;
-
-          warn = (msg, range, tip) => {
-            const data = { 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 (const key in options) {
-          if (key !== 'modules' && key !== 'directives') {
-            finalOptions[key] = options[key];
-          }
-        }
-      }
-
-      finalOptions.warn = warn;
-
-      const compiled = baseCompile(template.trim(), finalOptions);
-      {
-        detectErrors(compiled.ast, warn);
-      }
-      compiled.errors = errors;
-      compiled.tips = tips;
-      return compiled
-    }
-
-    return {
-      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.
-const createCompiler = createCompilerCreator(function baseCompile (
-  template,
-  options
-) {
-  const ast = parse(template.trim(), options);
-  if (options.optimize !== false) {
-    optimize(ast, options);
-  }
-  const code = generate(ast, options);
-  return {
-    ast,
-    render: code.render,
-    staticRenderFns: code.staticRenderFns
-  }
-});
-
-/*  */
-
-const { compile, compileToFunctions } = createCompiler(baseOptions);
-
-/*  */
-
-// check whether current browser encodes a char inside attribute values
-let 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
-const shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
-// #6828: chrome encodes content in a[href]
-const shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
-
-/*  */
-
-const idToTemplate = cached(id => {
-  const el = query(id);
-  return el && el.innerHTML
-});
-
-const mount = Vue.prototype.$mount;
-Vue.prototype.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && query(el);
-
-  /* istanbul ignore if */
-  if (el === document.body || el === document.documentElement) {
-    warn(
-      `Do not mount Vue to <html> or <body> - mount to normal elements instead.`
-    );
-    return this
-  }
-
-  const options = this.$options;
-  // resolve template/el and convert to render function
-  if (!options.render) {
-    let 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');
-      }
-
-      const { render, staticRenderFns } = compileToFunctions(template, {
-        outputSourceRange: "development" !== 'production',
-        shouldDecodeNewlines,
-        shouldDecodeNewlinesForHref,
-        delimiters: options.delimiters,
-        comments: options.comments
-      }, this);
-      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 {
-    const container = document.createElement('div');
-    container.appendChild(el.cloneNode(true));
-    return container.innerHTML
-  }
-}
-
-Vue.compile = compileToFunctions;
-
-export default Vue;
\ No newline at end of file
