https://www.plapla.com.mx/h5/paymentCodeH5/js/vue.js

1/*!
2 * Vue.js v2.6.14
3 * (c) 2014-2021 Evan You
4 * Released under the MIT License.
5 */
6(function (global, factory) {
7  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
8  typeof define === 'function' && define.amd ? define(factory) :
9  (global = global || self, global.Vue = factory());
10}(this, function () { 'use strict';
11
12  /*  */
13
14  var emptyObject = Object.freeze({});
15
16  // These helpers produce better VM code in JS engines due to their
17  // explicitness and function inlining.
18  function isUndef (v) {
19    return v === undefined || v === null
20  }
21
22  function isDef (v) {
23    return v !== undefined && v !== null
24  }
25
26  function isTrue (v) {
27    return v === true
28  }
29
30  function isFalse (v) {
31    return v === false
32  }
33
34  /**
35   * Check if value is primitive.
36   */
37  function isPrimitive (value) {
38    return (
39      typeof value === 'string' ||
40      typeof value === 'number' ||
41      // $flow-disable-line
42      typeof value === 'symbol' ||
43      typeof value === 'boolean'
44    )
45  }
46
47  /**
48   * Quick object check - this is primarily used to tell
49   * Objects from primitive values when we know the value
50   * is a JSON-compliant type.
51   */
52  function isObject (obj) {
53    return obj !== null && typeof obj === 'object'
54  }
55
56  /**
57   * Get the raw type string of a value, e.g., [object Object].
58   */
59  var _toString = Object.prototype.toString;
60
61  function toRawType (value) {
62    return _toString.call(value).slice(8, -1)
63  }
64
65  /**
66   * Strict object type check. Only returns true
67   * for plain JavaScript objects.
68   */
69  function isPlainObject (obj) {
70    return _toString.call(obj) === '[object Object]'
71  }
72
73  function isRegExp (v) {
74    return _toString.call(v) === '[object RegExp]'
75  }
76
77  /**
78   * Check if val is a valid array index.
79   */
80  function isValidArrayIndex (val) {
81    var n = parseFloat(String(val));
82    return n >= 0 && Math.floor(n) === n && isFinite(val)
83  }
84
85  function isPromise (val) {
86    return (
87      isDef(val) &&
88      typeof val.then === 'function' &&
89      typeof val.catch === 'function'
90    )
91  }
92
93  /**
94   * Convert a value to a string that is actually rendered.
95   */
96  function toString (val) {
97    return val == null
98      ? ''
99      : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
100        ? JSON.stringify(val, null, 2)
101        : String(val)
102  }
103
104  /**
105   * Convert an input value to a number for persistence.
106   * If the conversion fails, return original string.
107   */
108  function toNumber (val) {
109    var n = parseFloat(val);
110    return isNaN(n) ? val : n
111  }
112
113  /**
114   * Make a map and return a function for checking if a key
115   * is in that map.
116   */
117  function makeMap (
118    str,
119    expectsLowerCase
120  ) {
121    var map = Object.create(null);
122    var list = str.split(',');
123    for (var i = 0; i < list.length; i++) {
124      map[list[i]] = true;
125    }
126    return expectsLowerCase
127      ? function (val) { return map[val.toLowerCase()]; }
128      : function (val) { return map[val]; }
129  }
130
131  /**
132   * Check if a tag is a built-in tag.
133   */
134  var isBuiltInTag = makeMap('slot,component', true);
135
136  /**
137   * Check if an attribute is a reserved attribute.
138   */
139  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
140
141  /**
142   * Remove an item from an array.
143   */
144  function remove (arr, item) {
145    if (arr.length) {
146      var index = arr.indexOf(item);
147      if (index > -1) {
148        return arr.splice(index, 1)
149      }
150    }
151  }
152
153  /**
154   * Check whether an object has the property.
155   */
156  var hasOwnProperty = Object.prototype.hasOwnProperty;
157  function hasOwn (obj, key) {
158    return hasOwnProperty.call(obj, key)
159  }
160
161  /**
162   * Create a cached version of a pure function.
163   */
164  function cached (fn) {
165    var cache = Object.create(null);
166    return (function cachedFn (str) {
167      var hit = cache[str];
168      return hit || (cache[str] = fn(str))
169    })
170  }
171
172  /**
173   * Camelize a hyphen-delimited string.
174   */
175  var camelizeRE = /-(\w)/g;
176  var camelize = cached(function (str) {
177    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
178  });
179
180  /**
181   * Capitalize a string.
182   */
183  var capitalize = cached(function (str) {
184    return str.charAt(0).toUpperCase() + str.slice(1)
185  });
186
187  /**
188   * Hyphenate a camelCase string.
189   */
190  var hyphenateRE = /\B([A-Z])/g;
191  var hyphenate = cached(function (str) {
192    return str.replace(hyphenateRE, '-$1').toLowerCase()
193  });
194
195  /**
196   * Simple bind polyfill for environments that do not support it,
197   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
198   * since native bind is now performant enough in most browsers.

199   * But removing it would mean breaking code that was able to run in
200   * PhantomJS 1.x, so this must be kept for backward compatibility.
201   */
202
203  /* istanbul ignore next */
204  function polyfillBind (fn, ctx) {
205    function boundFn (a) {
206      var l = arguments.length;
207      return l
208        ? l > 1
209          ? fn.apply(ctx, arguments)
210          : fn.call(ctx, a)
211        : fn.call(ctx)
212    }
213
214    boundFn._length = fn.length;
215    return boundFn
216  }
217
218  function nativeBind (fn, ctx) {
219    return fn.bind(ctx)
220  }
221
222  var bind = Function.prototype.bind
223    ? nativeBind
224    : polyfillBind;
225
226  /**
227   * Convert an Array-like object to a real Array.
228   */
229  function toArray (list, start) {
230    start = start || 0;
231    var i = list.length - start;
232    var ret = new Array(i);
233    while (i--) {
234      ret[i] = list[i + start];
235    }
236    return ret
237  }
238
239  /**
240   * Mix properties into target object.
241   */
242  function extend (to, _from) {
243    for (var key in _from) {
244      to[key] = _from[key];
245    }
246    return to
247  }
248
249  /**
250   * Merge an Array of Objects into a single Object.
251   */
252  function toObject (arr) {
253    var res = {};
254    for (var i = 0; i < arr.length; i++) {
255      if (arr[i]) {
256        extend(res, arr[i]);
257      }
258    }
259    return res
260  }
261
262  /* eslint-disable no-unused-vars */
263
264  /**
265   * Perform no operation.
266   * Stubbing args to make Flow happy without leaving useless transpiled code
267   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
268   */
269  function noop (a, b, c) {}
270
271  /**
272   * Always return false.
273   */
274  var no = function (a, b, c) { return false; };
275
276  /* eslint-enable no-unused-vars */
277
278  /**
279   * Return the same value.
280   */
281  var identity = function (_) { return _; };
282
283  /**
284   * Generate a string containing static keys from compiler modules.
285   */
286  function genStaticKeys (modules) {
287    return modules.reduce(function (keys, m) {
288      return keys.concat(m.staticKeys || [])
289    }, []).join(',')
290  }
291
292  /**
293   * Check if two values are loosely equal - that is,
294   * if they are plain objects, do they have the same shape?
295   */
296  function looseEqual (a, b) {
297    if (a === b) { return true }
298    var isObjectA = isObject(a);
299    var isObjectB = isObject(b);
300    if (isObjectA && isObjectB) {
301      try {
302        var isArrayA = Array.isArray(a);
303        var isArrayB = Array.isArray(b);
304        if (isArrayA && isArrayB) {
305          return a.length === b.length && a.every(function (e, i) {
306            return looseEqual(e, b[i])
307          })
308        } else if (a instanceof Date && b instanceof Date) {
309          return a.getTime() === b.getTime()
310        } else if (!isArrayA && !isArrayB) {
311          var keysA = Object.keys(a);
312          var keysB = Object.keys(b);
313          return keysA.length === keysB.length && keysA.every(function (key) {
314            return looseEqual(a[key], b[key])
315          })
316        } else {
317          /* istanbul ignore next */
318          return false
319        }
320      } catch (e) {
321        /* istanbul ignore next */
322        return false
323      }
324    } else if (!isObjectA && !isObjectB) {
325      return String(a) === String(b)
326    } else {
327      return false
328    }
329  }
330
331  /**
332   * Return the first index at which a loosely equal value can be
333   * found in the array (if value is a plain object, the array must
334   * contain an object of the same shape), or -1 if it is not present.
335   */
336  function looseIndexOf (arr, val) {
337    for (var i = 0; i < arr.length; i++) {
338      if (looseEqual(arr[i], val)) { return i }
339    }
340    return -1
341  }
342
343  /**
344   * Ensure a function is called only once.
345   */
346  function once (fn) {
347    var called = false;
348    return function () {
349      if (!called) {
350        called = true;
351        fn.apply(this, arguments);
352      }
353    }
354  }
355
356  var SSR_ATTR = 'data-server-rendered';
357
358  var ASSET_TYPES = [
359    'component',
360    'directive',
361    'filter'
362  ];
363
364  var LIFECYCLE_HOOKS = [
365    'beforeCreate',
366    'created',
367    'beforeMount',
368    'mounted',
369    'beforeUpdate',
370    'updated',
371    'beforeDestroy',
372    'destroyed',
373    'activated',
374    'deactivated',
375    'errorCaptured',
376    'serverPrefetch'
377  ];
378
379  /*  */
380
381
382
383  var config = ({
384    /**
385     * Option merge strategies (used in core/util/options)
386     */
387    // $flow-disable-line
388    optionMergeStrategies: Object.create(null),
389
390    /**
391     * Whether to suppress warnings.
392     */
393    silent: false,
394
395    /**
396     * Show production mode tip message on boot?
397     */
398    productionTip: "development" !== 'production',
399
400    /**
401     * Whether to enable devtools
402     */
403    devtools: "development" !== 'production',
404
405    /**
406     * Whether to record perf
407     */
408    performance: false,
409
410    /**
411     * Error handler for watcher errors
412     */
413    errorHandler: null,
414
415    /**
416     * Warn handler for watcher warns
417     */
418    warnHandler: null,
419
420    /**
421     * Ignore certain custom elements
422     */
423    ignoredElements: [],
424
425    /**
426     * Custom user key aliases for v-on
427     */
428    // $flow-disable-line
429    keyCodes: Object.create(null),
430
431    /**
432     * Check if a tag is reserved so that it cannot be registered as a

433     * component. This is platform-dependent and may be overwritten.
434     */
435    isReservedTag: no,
436
437    /**
438     * Check if an attribute is reserved so that it cannot be used as a component
439     * prop. This is platform-dependent and may be overwritten.
440     */
441    isReservedAttr: no,
442
443    /**
444     * Check if a tag is an unknown element.
445     * Platform-dependent.
446     */
447    isUnknownElement: no,
448
449    /**
450     * Get the namespace of an element
451     */
452    getTagNamespace: noop,
453
454    /**
455     * Parse the real tag name for the specific platform.
456     */
457    parsePlatformTagName: identity,
458
459    /**
460     * Check if an attribute must be bound using property, e.g. value
461     * Platform-dependent.
462     */
463    mustUseProp: no,
464
465    /**
466     * Perform updates asynchronously. Intended to be used by Vue Test Utils
467     * This will significantly reduce performance if set to false.
468     */
469    async: true,
470
471    /**
472     * Exposed for legacy reasons
473     */
474    _lifecycleHooks: LIFECYCLE_HOOKS
475  });
476
477  /*  */
478
479  /**
480   * unicode letters used for parsing html tags, component names and property paths.
481   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
482   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
483   */
484  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
485
486  /**
487   * Check if a string starts with $ or _
488   */
489  function isReserved (str) {
490    var c = (str + '').charCodeAt(0);
491    return c === 0x24 || c === 0x5F
492  }
493
494  /**
495   * Define a property.
496   */
497  function def (obj, key, val, enumerable) {
498    Object.defineProperty(obj, key, {
499      value: val,
500      enumerable: !!enumerable,
501      writable: true,
502      configurable: true
503    });
504  }
505
506  /**
507   * Parse simple path.
508   */
509  var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
510  function parsePath (path) {
511    if (bailRE.test(path)) {
512      return
513    }
514    var segments = path.split('.');
515    return function (obj) {
516      for (var i = 0; i < segments.length; i++) {
517        if (!obj) { return }
518        obj = obj[segments[i]];
519      }
520      return obj
521    }
522  }
523
524  /*  */
525
526  // can we use __proto__?
527  var hasProto = '__proto__' in {};
528
529  // Browser environment sniffing
530  var inBrowser = typeof window !== 'undefined';
531  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
532  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
533  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
534  var isIE = UA && /msie|trident/.test(UA);
535  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
536  var isEdge = UA && UA.indexOf('edge/') > 0;
537  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
538  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
539  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
540  var isPhantomJS = UA && /phantomjs/.test(UA);
541  var isFF = UA && UA.match(/firefox\/(\d+)/);
542
543  // Firefox has a "watch" function on Object.prototype...
544  var nativeWatch = ({}).watch;
545
546  var supportsPassive = false;
547  if (inBrowser) {
548    try {
549      var opts = {};
550      Object.defineProperty(opts, 'passive', ({
551        get: function get () {
552          /* istanbul ignore next */
553          supportsPassive = true;
554        }
555      })); // https://github.com/facebook/flow/issues/285
556      window.addEventListener('test-passive', null, opts);
557    } catch (e) {}
558  }
559
560  // this needs to be lazy-evaled because vue may be required before
561  // vue-server-renderer can set VUE_ENV
562  var _isServer;
563  var isServerRendering = function () {
564    if (_isServer === undefined) {
565      /* istanbul ignore if */
566      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
567        // detect presence of vue-server-renderer and avoid
568        // Webpack shimming the process
569        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
570      } else {
571        _isServer = false;
572      }
573    }
574    return _isServer
575  };
576
577  // detect devtools
578  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
579
580  /* istanbul ignore next */
581  function isNative (Ctor) {
582    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
583  }
584
585  var hasSymbol =
586    typeof Symbol !== 'undefined' && isNative(Symbol) &&
587    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
588
589  var _Set;
590  /* istanbul ignore if */ // $flow-disable-line
591  if (typeof Set !== 'undefined' && isNative(Set)) {
592    // use native Set when available.
593    _Set = Set;
594  } else {
595    // a non-standard Set polyfill that only works with primitive keys.
596    _Set = /*@__PURE__*/(function () {
597      function Set () {
598        this.set = Object.create(null);
599      }
600      Set.prototype.has = function has (key) {
601        return this.set[key] === true
602      };
603      Set.prototype.add = function add (key) {
604        this.set[key] = true;
605      };
606      Set.prototype.clear = function clear () {
607        this.set = Object.create(null);
608      };
609
610      return Set;
611    }());
612  }
613
614  /*  */
615
616  var warn = noop;
617  var tip = noop;
618  var generateComponentTrace = (noop); // work around flow check
619  var formatComponentName = (noop);
620
621  {
622    var hasConsole = typeof console !== 'undefined';
623    var classifyRE = /(?:^|[-_])(\w)/g;
624    var classify = function (str) { return str
625      .replace(classifyRE, function (c) { return c.toUpperCase(); })
626      .replace(/[-_]/g, ''); };
627
628    warn = function (msg, vm) {
629      var trace = vm ? generateComponentTrace(vm) : '';
630
631      if (config.warnHandler) {
632        config.warnHandler.call(null, msg, vm, trace);
633      } else if (hasConsole && (!config.silent)) {
634        console.error(("[Vue warn]: " + msg + trace));
635      }
636    };
637
638    tip = function (msg, vm) {
639      if (hasConsole && (!config.silent)) {
640        console.warn("[Vue tip]: " + msg + (
641          vm ? generateComponentTrace(vm) : ''
642        ));
643      }
644    };
645
646    formatComponentName = function (vm, includeFile) {
647      if (vm.$root === vm) {
648        return '<Root>'
649      }
650      var options = typeof vm === 'function' && vm.cid != null
651        ? vm.options
652        : vm._isVue
653          ? vm.$options || vm.constructor.options
654          : vm;
655      var name = options.name || options._componentTag;
656      var file = options.__file;
657      if (!name && file) {
658        var match = file.match(/([^/\\]+)\.vue$/);
659        name = match && match[1];
660      }
661
662      return (
663        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
664        (file && includeFile !== false ? (" at " + file) : '')
665      )
666    };
667
668    var repeat = function (str, n) {
669      var res = '';
670      while (n) {
671        if (n % 2 === 1) { res += str; }
672        if (n > 1) { str += str; }
673        n >>= 1;
674      }
675      return res
676    };
677
678    generateComponentTrace = function (vm) {
679      if (vm._isVue && vm.$parent) {
680        var tree = [];
681        var currentRecursiveSequence = 0;
682        while (vm) {
683          if (tree.length > 0) {
684            var last = tree[tree.length - 1];
685            if (last.constructor === vm.constructor) {
686              currentRecursiveSequence++;
687              vm = vm.$parent;
688              continue
689            } else if (currentRecursiveSequence > 0) {
690              tree[tree.length - 1] = [last, currentRecursiveSequence];
691              currentRecursiveSequence = 0;
692            }
693          }
694          tree.push(vm);
695          vm = vm.$parent;
696        }
697        return '\n\nfound in\n\n' + tree
698          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
699              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
700              : formatComponentName(vm))); })
701          .join('\n')
702      } else {
703        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
704      }
705    };
706  }
707
708  /*  */
709
710  var uid = 0;
711
712  /**
713   * A dep is an observable that can have multiple
714   * directives subscribing to it.
715   */
716  var Dep = function Dep () {
717    this.id = uid++;
718    this.subs = [];
719  };
720
721  Dep.prototype.addSub = function addSub (sub) {
722    this.subs.push(sub);
723  };
724
725  Dep.prototype.removeSub = function removeSub (sub) {
726    remove(this.subs, sub);
727  };
728

729  Dep.prototype.depend = function depend () {
730    if (Dep.target) {
731      Dep.target.addDep(this);
732    }
733  };
734
735  Dep.prototype.notify = function notify () {
736    // stabilize the subscriber list first
737    var subs = this.subs.slice();
738    if (!config.async) {
739      // subs aren't sorted in scheduler if not running async
740      // we need to sort them now to make sure they fire in correct
741      // order
742      subs.sort(function (a, b) { return a.id - b.id; });
743    }
744    for (var i = 0, l = subs.length; i < l; i++) {
745      subs[i].update();
746    }
747  };
748
749  // The current target watcher being evaluated.
750  // This is globally unique because only one watcher
751  // can be evaluated at a time.
752  Dep.target = null;
753  var targetStack = [];
754
755  function pushTarget (target) {
756    targetStack.push(target);
757    Dep.target = target;
758  }
759
760  function popTarget () {
761    targetStack.pop();
762    Dep.target = targetStack[targetStack.length - 1];
763  }
764
765  /*  */
766
767  var VNode = function VNode (
768    tag,
769    data,
770    children,
771    text,
772    elm,
773    context,
774    componentOptions,
775    asyncFactory
776  ) {
777    this.tag = tag;
778    this.data = data;
779    this.children = children;
780    this.text = text;
781    this.elm = elm;
782    this.ns = undefined;
783    this.context = context;
784    this.fnContext = undefined;
785    this.fnOptions = undefined;
786    this.fnScopeId = undefined;
787    this.key = data && data.key;
788    this.componentOptions = componentOptions;
789    this.componentInstance = undefined;
790    this.parent = undefined;
791    this.raw = false;
792    this.isStatic = false;
793    this.isRootInsert = true;
794    this.isComment = false;
795    this.isCloned = false;
796    this.isOnce = false;
797    this.asyncFactory = asyncFactory;
798    this.asyncMeta = undefined;
799    this.isAsyncPlaceholder = false;
800  };
801
802  var prototypeAccessors = { child: { configurable: true } };
803
804  // DEPRECATED: alias for componentInstance for backwards compat.
805  /* istanbul ignore next */
806  prototypeAccessors.child.get = function () {
807    return this.componentInstance
808  };
809
810  Object.defineProperties( VNode.prototype, prototypeAccessors );
811
812  var createEmptyVNode = function (text) {
813    if ( text === void 0 ) text = '';
814
815    var node = new VNode();
816    node.text = text;
817    node.isComment = true;
818    return node
819  };
820
821  function createTextVNode (val) {
822    return new VNode(undefined, undefined, undefined, String(val))
823  }
824
825  // optimized shallow clone
826  // used for static nodes and slot nodes because they may be reused across
827  // multiple renders, cloning them avoids errors when DOM manipulations rely
828  // on their elm reference.
829  function cloneVNode (vnode) {
830    var cloned = new VNode(
831      vnode.tag,
832      vnode.data,
833      // #7975
834      // clone children array to avoid mutating original in case of cloning
835      // a child.
836      vnode.children && vnode.children.slice(),
837      vnode.text,
838      vnode.elm,
839      vnode.context,
840      vnode.componentOptions,
841      vnode.asyncFactory
842    );
843    cloned.ns = vnode.ns;
844    cloned.isStatic = vnode.isStatic;
845    cloned.key = vnode.key;
846    cloned.isComment = vnode.isComment;
847    cloned.fnContext = vnode.fnContext;
848    cloned.fnOptions = vnode.fnOptions;
849    cloned.fnScopeId = vnode.fnScopeId;
850    cloned.asyncMeta = vnode.asyncMeta;
851    cloned.isCloned = true;
852    return cloned
853  }
854
855  /*
856   * not type checking this file because flow doesn't play well with
857   * dynamically accessing methods on Array prototype
858   */
859
860  var arrayProto = Array.prototype;
861  var arrayMethods = Object.create(arrayProto);
862
863  var methodsToPatch = [
864    'push',
865    'pop',
866    'shift',
867    'unshift',
868    'splice',
869    'sort',
870    'reverse'
871  ];
872
873  /**
874   * Intercept mutating methods and emit events
875   */
876  methodsToPatch.forEach(function (method) {
877    // cache original method
878    var original = arrayProto[method];
879    def(arrayMethods, method, function mutator () {
880      var args = [], len = arguments.length;
881      while ( len-- ) args[ len ] = arguments[ len ];
882
883      var result = original.apply(this, args);
884      var ob = this.__ob__;
885      var inserted;
886      switch (method) {
887        case 'push':
888        case 'unshift':
889          inserted = args;
890          break
891        case 'splice':
892          inserted = args.slice(2);
893          break
894      }
895      if (inserted) { ob.observeArray(inserted); }
896      // notify change
897      ob.dep.notify();
898      return result
899    });
900  });
901
902  /*  */
903
904  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
905
906  /**
907   * In some cases we may want to disable observation inside a component's
908   * update computation.
909   */
910  var shouldObserve = true;
911
912  function toggleObserving (value) {
913    shouldObserve = value;
914  }
915
916  /**
917   * Observer class that is attached to each observed
918   * object. Once attached, the observer converts the target
919   * object's property keys into getter/setters that
920   * collect dependencies and dispatch updates.
921   */
922  var Observer = function Observer (value) {
923    this.value = value;
924    this.dep = new Dep();
925    this.vmCount = 0;
926    def(value, '__ob__', this);
927    if (Array.isArray(value)) {
928      if (hasProto) {
929        protoAugment(value, arrayMethods);
930      } else {
931        copyAugment(value, arrayMethods, arrayKeys);
932      }
933      this.observeArray(value);
934    } else {
935      this.walk(value);
936    }
937  };
938
939  /**
940   * Walk through all properties and convert them into
941   * getter/setters. This method should only be called when
942   * value type is Object.
943   */
944  Observer.prototype.walk = function walk (obj) {
945    var keys = Object.keys(obj);
946    for (var i = 0; i < keys.length; i++) {
947      defineReactive$$1(obj, keys[i]);
948    }
949  };
950
951  /**
952   * Observe a list of Array items.
953   */
954  Observer.prototype.observeArray = function observeArray (items) {
955    for (var i = 0, l = items.length; i < l; i++) {
956      observe(items[i]);
957    }
958  };
959
960  // helpers
961
962  /**
963   * Augment a target Object or Array by intercepting
964   * the prototype chain using __proto__
965   */

966  function protoAugment (target, src) {
967    /* eslint-disable no-proto */
968    target.__proto__ = src;
969    /* eslint-enable no-proto */
970  }
971
972  /**
973   * Augment a target Object or Array by defining
974   * hidden properties.
975   */
976  /* istanbul ignore next */
977  function copyAugment (target, src, keys) {
978    for (var i = 0, l = keys.length; i < l; i++) {
979      var key = keys[i];
980      def(target, key, src[key]);
981    }
982  }
983
984  /**
985   * Attempt to create an observer instance for a value,
986   * returns the new observer if successfully observed,
987   * or the existing observer if the value already has one.
988   */
989  function observe (value, asRootData) {
990    if (!isObject(value) || value instanceof VNode) {
991      return
992    }
993    var ob;
994    if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
995      ob = value.__ob__;
996    } else if (
997      shouldObserve &&
998      !isServerRendering() &&
999      (Array.isArray(value) || isPlainObject(value)) &&
1000      Object.isExtensible(value) &&
1001      !value._isVue
1002    ) {
1003      ob = new Observer(value);
1004    }
1005    if (asRootData && ob) {
1006      ob.vmCount++;
1007    }
1008    return ob
1009  }
1010
1011  /**
1012   * Define a reactive property on an Object.
1013   */
1014  function defineReactive$$1 (
1015    obj,
1016    key,
1017    val,
1018    customSetter,
1019    shallow
1020  ) {
1021    var dep = new Dep();
1022
1023    var property = Object.getOwnPropertyDescriptor(obj, key);
1024    if (property && property.configurable === false) {
1025      return
1026    }
1027
1028    // cater for pre-defined getter/setters
1029    var getter = property && property.get;
1030    var setter = property && property.set;
1031    if ((!getter || setter) && arguments.length === 2) {
1032      val = obj[key];
1033    }
1034
1035    var childOb = !shallow && observe(val);
1036    Object.defineProperty(obj, key, {
1037      enumerable: true,
1038      configurable: true,
1039      get: function reactiveGetter () {
1040        var value = getter ? getter.call(obj) : val;
1041        if (Dep.target) {
1042          dep.depend();
1043          if (childOb) {
1044            childOb.dep.depend();
1045            if (Array.isArray(value)) {
1046              dependArray(value);
1047            }
1048          }
1049        }
1050        return value
1051      },
1052      set: function reactiveSetter (newVal) {
1053        var value = getter ? getter.call(obj) : val;
1054        /* eslint-disable no-self-compare */
1055        if (newVal === value || (newVal !== newVal && value !== value)) {
1056          return
1057        }
1058        /* eslint-enable no-self-compare */
1059        if (customSetter) {
1060          customSetter();
1061        }
1062        // #7981: for accessor properties without setter
1063        if (getter && !setter) { return }
1064        if (setter) {
1065          setter.call(obj, newVal);
1066        } else {
1067          val = newVal;
1068        }
1069        childOb = !shallow && observe(newVal);
1070        dep.notify();
1071      }
1072    });
1073  }
1074
1075  /**
1076   * Set a property on an object. Adds the new property and
1077   * triggers change notification if the property doesn't
1078   * already exist.
1079   */
1080  function set (target, key, val) {
1081    if (isUndef(target) || isPrimitive(target)
1082    ) {
1083      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
1084    }
1085    if (Array.isArray(target) && isValidArrayIndex(key)) {
1086      target.length = Math.max(target.length, key);
1087      target.splice(key, 1, val);
1088      return val
1089    }
1090    if (key in target && !(key in Object.prototype)) {
1091      target[key] = val;
1092      return val
1093    }
1094    var ob = (target).__ob__;
1095    if (target._isVue || (ob && ob.vmCount)) {
1096      warn(
1097        'Avoid adding reactive properties to a Vue instance or its root $data ' +
1098        'at runtime - declare it upfront in the data option.'
1099      );
1100      return val
1101    }
1102    if (!ob) {
1103      target[key] = val;
1104      return val
1105    }
1106    defineReactive$$1(ob.value, key, val);
1107    ob.dep.notify();
1108    return val
1109  }
1110
1111  /**
1112   * Delete a property and trigger change if necessary.
1113   */
1114  function del (target, key) {
1115    if (isUndef(target) || isPrimitive(target)
1116    ) {
1117      warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
1118    }
1119    if (Array.isArray(target) && isValidArrayIndex(key)) {
1120      target.splice(key, 1);
1121      return
1122    }
1123    var ob = (target).__ob__;
1124    if (target._isVue || (ob && ob.vmCount)) {
1125      warn(
1126        'Avoid deleting properties on a Vue instance or its root $data ' +

1127        '- just set it to null.'
1128      );
1129      return
1130    }
1131    if (!hasOwn(target, key)) {
1132      return
1133    }
1134    delete target[key];
1135    if (!ob) {
1136      return
1137    }
1138    ob.dep.notify();
1139  }
1140
1141  /**
1142   * Collect dependencies on array elements when the array is touched, since
1143   * we cannot intercept array element access like property getters.
1144   */
1145  function dependArray (value) {
1146    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
1147      e = value[i];
1148      e && e.__ob__ && e.__ob__.dep.depend();
1149      if (Array.isArray(e)) {
1150        dependArray(e);
1151      }
1152    }
1153  }
1154
1155  /*  */
1156
1157  /**
1158   * Option overwriting strategies are functions that handle
1159   * how to merge a parent option value and a child option
1160   * value into the final value.
1161   */
1162  var strats = config.optionMergeStrategies;
1163
1164  /**
1165   * Options with restrictions
1166   */
1167  {
1168    strats.el = strats.propsData = function (parent, child, vm, key) {
1169      if (!vm) {
1170        warn(
1171          "option \"" + key + "\" can only be used during instance " +
1172          'creation with the `new` keyword.'
1173        );
1174      }
1175      return defaultStrat(parent, child)
1176    };
1177  }
1178
1179  /**
1180   * Helper that recursively merges two data objects together.
1181   */
1182  function mergeData (to, from) {
1183    if (!from) { return to }
1184    var key, toVal, fromVal;
1185
1186    var keys = hasSymbol
1187      ? Reflect.ownKeys(from)
1188      : Object.keys(from);
1189
1190    for (var i = 0; i < keys.length; i++) {
1191      key = keys[i];
1192      // in case the object is already observed...
1193      if (key === '__ob__') { continue }
1194      toVal = to[key];
1195      fromVal = from[key];
1196      if (!hasOwn(to, key)) {
1197        set(to, key, fromVal);
1198      } else if (
1199        toVal !== fromVal &&
1200        isPlainObject(toVal) &&
1201        isPlainObject(fromVal)
1202      ) {
1203        mergeData(toVal, fromVal);
1204      }
1205    }
1206    return to
1207  }
1208
1209  /**
1210   * Data
1211   */
1212  function mergeDataOrFn (
1213    parentVal,
1214    childVal,
1215    vm
1216  ) {
1217    if (!vm) {
1218      // in a Vue.extend merge, both should be functions
1219      if (!childVal) {
1220        return parentVal
1221      }
1222      if (!parentVal) {
1223        return childVal
1224      }
1225      // when parentVal & childVal are both present,
1226      // we need to return a function that returns the
1227      // merged result of both functions... no need to
1228      // check if parentVal is a function here because
1229      // it has to be a function to pass previous merges.
1230      return function mergedDataFn () {
1231        return mergeData(
1232          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
1233          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
1234        )
1235      }
1236    } else {
1237      return function mergedInstanceDataFn () {
1238        // instance merge
1239        var instanceData = typeof childVal === 'function'
1240          ? childVal.call(vm, vm)
1241          : childVal;
1242        var defaultData = typeof parentVal === 'function'
1243          ? parentVal.call(vm, vm)
1244          : parentVal;
1245        if (instanceData) {
1246          return mergeData(instanceData, defaultData)
1247        } else {
1248          return defaultData
1249        }
1250      }
1251    }
1252  }
1253
1254  strats.data = function (
1255    parentVal,
1256    childVal,
1257    vm
1258  ) {
1259    if (!vm) {
1260      if (childVal && typeof childVal !== 'function') {
1261        warn(
1262          'The "data" option should be a function ' +
1263          'that returns a per-instance value in component ' +
1264          'definitions.',
1265          vm
1266        );
1267
1268        return parentVal
1269      }
1270      return mergeDataOrFn(parentVal, childVal)
1271    }
1272
1273    return mergeDataOrFn(parentVal, childVal, vm)
1274  };
1275
1276  /**
1277   * Hooks and props are merged as arrays.
1278   */
1279  function mergeHook (
1280    parentVal,
1281    childVal
1282  ) {
1283    var res = childVal
1284      ? parentVal
1285        ? parentVal.concat(childVal)
1286        : Array.isArray(childVal)
1287          ? childVal
1288          : [childVal]
1289      : parentVal;
1290    return res
1291      ? dedupeHooks(res)
1292      : res
1293  }
1294
1295  function dedupeHooks (hooks) {
1296    var res = [];
1297    for (var i = 0; i < hooks.length; i++) {
1298      if (res.indexOf(hooks[i]) === -1) {
1299        res.push(hooks[i]);
1300      }
1301    }
1302    return res
1303  }
1304
1305  LIFECYCLE_HOOKS.forEach(function (hook) {
1306    strats[hook] = mergeHook;
1307  });
1308
1309  /**
1310   * Assets
1311   *
1312   * When a vm is present (instance creation), we need to do
1313   * a three-way merge between constructor options, instance
1314   * options and parent options.
1315   */
1316  function mergeAssets (
1317    parentVal,
1318    childVal,
1319    vm,
1320    key
1321  ) {
1322    var res = Object.create(parentVal || null);
1323    if (childVal) {
1324      assertObjectType(key, childVal, vm);
1325      return extend(res, childVal)
1326    } else {
1327      return res
1328    }
1329  }
1330
1331  ASSET_TYPES.forEach(function (type) {
1332    strats[type + 's'] = mergeAssets;
1333  });
1334
1335  /**
1336   * Watchers.
1337   *
1338   * Watchers hashes should not overwrite one
1339   * another, so we merge them as arrays.
1340   */
1341  strats.watch = function (
1342    parentVal,
1343    childVal,
1344    vm,
1345    key
1346  ) {
1347    // work around Firefox's Object.prototype.watch...
1348    if (parentVal === nativeWatch) { parentVal = undefined; }
1349    if (childVal === nativeWatch) { childVal = undefined; }
1350    /* istanbul ignore if */
1351    if (!childVal) { return Object.create(parentVal || null) }
1352    {
1353      assertObjectType(key, childVal, vm);
1354    }
1355    if (!parentVal) { return childVal }
1356    var ret = {};
1357    extend(ret, parentVal);
1358    for (var key$1 in childVal) {
1359      var parent = ret[key$1];
1360      var child = childVal[key$1];
1361      if (parent && !Array.isArray(parent)) {
1362        parent = [parent];
1363      }
1364      ret[key$1] = parent
1365        ? parent.concat(child)
1366        : Array.isArray(child) ? child : [child];
1367    }
1368    return ret
1369  };
1370
1371  /**
1372   * Other object hashes.
1373   */
1374  strats.props =
1375  strats.methods =
1376  strats.inject =
1377  strats.computed = function (
1378    parentVal,
1379    childVal,
1380    vm,
1381    key
1382  ) {
1383    if (childVal && "development" !== 'production') {
1384      assertObjectType(key, childVal, vm);
1385    }
1386    if (!parentVal) { return childVal }
1387    var ret = Object.create(null);
1388    extend(ret, parentVal);
1389    if (childVal) { extend(ret, childVal); }
1390    return ret
1391  };
1392  strats.provide = mergeDataOrFn;
1393
1394  /**
1395   * Default strategy.
1396   */
1397  var defaultStrat = function (parentVal, childVal) {
1398    return childVal === undefined
1399      ? parentVal
1400      : childVal
1401  };
1402
1403  /**
1404   * Validate component names
1405   */
1406  function checkComponents (options) {
1407    for (var key in options.components) {
1408      validateComponentName(key);
1409    }
1410  }
1411
1412  function validateComponentName (name) {
1413    if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
1414      warn(

1415        'Invalid component name: "' + name + '". Component names ' +
1416        'should conform to valid custom element name in html5 specification.'
1417      );
1418    }
1419    if (isBuiltInTag(name) || config.isReservedTag(name)) {
1420      warn(
1421        'Do not use built-in or reserved HTML elements as component ' +
1422        'id: ' + name
1423      );
1424    }
1425  }
1426
1427  /**
1428   * Ensure all props option syntax are normalized into the
1429   * Object-based format.
1430   */
1431  function normalizeProps (options, vm) {
1432    var props = options.props;
1433    if (!props) { return }
1434    var res = {};
1435    var i, val, name;
1436    if (Array.isArray(props)) {
1437      i = props.length;
1438      while (i--) {
1439        val = props[i];
1440        if (typeof val === 'string') {
1441          name = camelize(val);
1442          res[name] = { type: null };
1443        } else {
1444          warn('props must be strings when using array syntax.');
1445        }
1446      }
1447    } else if (isPlainObject(props)) {
1448      for (var key in props) {
1449        val = props[key];
1450        name = camelize(key);
1451        res[name] = isPlainObject(val)
1452          ? val
1453          : { type: val };
1454      }
1455    } else {
1456      warn(
1457        "Invalid value for option \"props\": expected an Array or an Object, " +
1458        "but got " + (toRawType(props)) + ".",
1459        vm
1460      );
1461    }
1462    options.props = res;
1463  }
1464
1465  /**
1466   * Normalize all injections into Object-based format
1467   */
1468  function normalizeInject (options, vm) {
1469    var inject = options.inject;
1470    if (!inject) { return }
1471    var normalized = options.inject = {};
1472    if (Array.isArray(inject)) {
1473      for (var i = 0; i < inject.length; i++) {
1474        normalized[inject[i]] = { from: inject[i] };
1475      }
1476    } else if (isPlainObject(inject)) {
1477      for (var key in inject) {
1478        var val = inject[key];
1479        normalized[key] = isPlainObject(val)
1480          ? extend({ from: key }, val)
1481          : { from: val };
1482      }
1483    } else {
1484      warn(
1485        "Invalid value for option \"inject\": expected an Array or an Object, " +
1486        "but got " + (toRawType(inject)) + ".",
1487        vm
1488      );
1489    }
1490  }
1491
1492  /**
1493   * Normalize raw function directives into object format.
1494   */
1495  function normalizeDirectives (options) {
1496    var dirs = options.directives;
1497    if (dirs) {
1498      for (var key in dirs) {
1499        var def$$1 = dirs[key];
1500        if (typeof def$$1 === 'function') {
1501          dirs[key] = { bind: def$$1, update: def$$1 };
1502        }
1503      }
1504    }
1505  }
1506
1507  function assertObjectType (name, value, vm) {
1508    if (!isPlainObject(value)) {
1509      warn(
1510        "Invalid value for option \"" + name + "\": expected an Object, " +
1511        "but got " + (toRawType(value)) + ".",
1512        vm
1513      );
1514    }
1515  }
1516
1517  /**
1518   * Merge two option objects into a new one.
1519   * Core utility used in both instantiation and inheritance.
1520   */
1521  function mergeOptions (
1522    parent,
1523    child,
1524    vm
1525  ) {
1526    {
1527      checkComponents(child);
1528    }
1529
1530    if (typeof child === 'function') {
1531      child = child.options;
1532    }
1533
1534    normalizeProps(child, vm);
1535    normalizeInject(child, vm);
1536    normalizeDirectives(child);
1537
1538    // Apply extends and mixins on the child options,
1539    // but only if it is a raw options object that isn't
1540    // the result of another mergeOptions call.
1541    // Only merged options has the _base property.
1542    if (!child._base) {
1543      if (child.extends) {
1544        parent = mergeOptions(parent, child.extends, vm);
1545      }
1546      if (child.mixins) {
1547        for (var i = 0, l = child.mixins.length; i < l; i++) {
1548          parent = mergeOptions(parent, child.mixins[i], vm);
1549        }
1550      }
1551    }
1552
1553    var options = {};
1554    var key;
1555    for (key in parent) {
1556      mergeField(key);
1557    }
1558    for (key in child) {
1559      if (!hasOwn(parent, key)) {
1560        mergeField(key);
1561      }
1562    }
1563    function mergeField (key) {
1564      var strat = strats[key] || defaultStrat;
1565      options[key] = strat(parent[key], child[key], vm, key);
1566    }
1567    return options
1568  }
1569
1570  /**
1571   * Resolve an asset.
1572   * This function is used because child instances need access
1573   * to assets defined in its ancestor chain.
1574   */
1575  function resolveAsset (
1576    options,
1577    type,
1578    id,
1579    warnMissing
1580  ) {
1581    /* istanbul ignore if */
1582    if (typeof id !== 'string') {
1583      return
1584    }
1585    var assets = options[type];
1586    // check local registration variations first
1587    if (hasOwn(assets, id)) { return assets[id] }
1588    var camelizedId = camelize(id);
1589    if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
1590    var PascalCaseId = capitalize(camelizedId);
1591    if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
1592    // fallback to prototype chain
1593    var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
1594    if (warnMissing && !res) {
1595      warn(
1596        'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
1597        options
1598      );
1599    }
1600    return res
1601  }
1602
1603  /*  */
1604
1605
1606
1607  function validateProp (
1608    key,
1609    propOptions,
1610    propsData,
1611    vm
1612  ) {
1613    var prop = propOptions[key];
1614    var absent = !hasOwn(propsData, key);
1615    var value = propsData[key];
1616    // boolean casting
1617    var booleanIndex = getTypeIndex(Boolean, prop.type);
1618    if (booleanIndex > -1) {
1619      if (absent && !hasOwn(prop, 'default')) {
1620        value = false;

1621      } else if (value === '' || value === hyphenate(key)) {
1622        // only cast empty string / same name to boolean if
1623        // boolean has higher priority
1624        var stringIndex = getTypeIndex(String, prop.type);
1625        if (stringIndex < 0 || booleanIndex < stringIndex) {
1626          value = true;
1627        }
1628      }
1629    }
1630    // check default value
1631    if (value === undefined) {
1632      value = getPropDefaultValue(vm, prop, key);
1633      // since the default value is a fresh copy,
1634      // make sure to observe it.
1635      var prevShouldObserve = shouldObserve;
1636      toggleObserving(true);
1637      observe(value);
1638      toggleObserving(prevShouldObserve);
1639    }
1640    {
1641      assertProp(prop, key, value, vm, absent);
1642    }
1643    return value
1644  }
1645
1646  /**
1647   * Get the default value of a prop.
1648   */
1649  function getPropDefaultValue (vm, prop, key) {
1650    // no default, return undefined
1651    if (!hasOwn(prop, 'default')) {
1652      return undefined
1653    }
1654    var def = prop.default;
1655    // warn against non-factory defaults for Object & Array
1656    if (isObject(def)) {
1657      warn(
1658        'Invalid default value for prop "' + key + '": ' +
1659        'Props with type Object/Array must use a factory function ' +
1660        'to return the default value.',
1661        vm
1662      );
1663    }
1664    // the raw prop value was also undefined from previous render,
1665    // return previous default value to avoid unnecessary watcher trigger
1666    if (vm && vm.$options.propsData &&
1667      vm.$options.propsData[key] === undefined &&
1668      vm._props[key] !== undefined
1669    ) {
1670      return vm._props[key]
1671    }
1672    // call factory function for non-Function types
1673    // a value is Function if its prototype is function even across different execution context
1674    return typeof def === 'function' && getType(prop.type) !== 'Function'
1675      ? def.call(vm)
1676      : def
1677  }
1678
1679  /**
1680   * Assert whether a prop is valid.
1681   */
1682  function assertProp (
1683    prop,
1684    name,
1685    value,
1686    vm,
1687    absent
1688  ) {
1689    if (prop.required && absent) {
1690      warn(
1691        'Missing required prop: "' + name + '"',
1692        vm
1693      );
1694      return
1695    }
1696    if (value == null && !prop.required) {
1697      return
1698    }
1699    var type = prop.type;
1700    var valid = !type || type === true;
1701    var expectedTypes = [];
1702    if (type) {
1703      if (!Array.isArray(type)) {
1704        type = [type];
1705      }
1706      for (var i = 0; i < type.length && !valid; i++) {
1707        var assertedType = assertType(value, type[i], vm);
1708        expectedTypes.push(assertedType.expectedType || '');
1709        valid = assertedType.valid;
1710      }
1711    }
1712
1713    var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
1714    if (!valid && haveExpectedTypes) {
1715      warn(
1716        getInvalidTypeMessage(name, value, expectedTypes),
1717        vm
1718      );
1719      return
1720    }
1721    var validator = prop.validator;
1722    if (validator) {
1723      if (!validator(value)) {
1724        warn(
1725          'Invalid prop: custom validator check failed for prop "' + name + '".',
1726          vm
1727        );
1728      }
1729    }
1730  }
1731
1732  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
1733
1734  function assertType (value, type, vm) {
1735    var valid;
1736    var expectedType = getType(type);
1737    if (simpleCheckRE.test(expectedType)) {
1738      var t = typeof value;
1739      valid = t === expectedType.toLowerCase();
1740      // for primitive wrapper objects
1741      if (!valid && t === 'object') {
1742        valid = value instanceof type;
1743      }
1744    } else if (expectedType === 'Object') {
1745      valid = isPlainObject(value);
1746    } else if (expectedType === 'Array') {
1747      valid = Array.isArray(value);
1748    } else {
1749      try {
1750        valid = value instanceof type;
1751      } catch (e) {
1752        warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
1753        valid = false;
1754      }
1755    }
1756    return {
1757      valid: valid,
1758      expectedType: expectedType
1759    }
1760  }
1761
1762  var functionTypeCheckRE = /^\s*function (\w+)/;
1763
1764  /**
1765   * Use function string name to check built-in types,
1766   * because a simple equality check will fail when running
1767   * across different vms / iframes.
1768   */
1769  function getType (fn) {
1770    var match = fn && fn.toString().match(functionTypeCheckRE);
1771    return match ? match[1] : ''
1772  }
1773
1774  function isSameType (a, b) {
1775    return getType(a) === getType(b)
1776  }
1777
1778  function getTypeIndex (type, expectedTypes) {
1779    if (!Array.isArray(expectedTypes)) {
1780      return isSameType(expectedTypes, type) ? 0 : -1
1781    }
1782    for (var i = 0, len = expectedTypes.length; i < len; i++) {
1783      if (isSameType(expectedTypes[i], type)) {
1784        return i
1785      }
1786    }
1787    return -1
1788  }
1789
1790  function getInvalidTypeMessage (name, value, expectedTypes) {
1791    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
1792      " Expected " + (expectedTypes.map(capitalize).join(', '));
1793    var expectedType = expectedTypes[0];
1794    var receivedType = toRawType(value);
1795    // check if we need to specify expected value
1796    if (
1797      expectedTypes.length === 1 &&
1798      isExplicable(expectedType) &&
1799      isExplicable(typeof value) &&
1800      !isBoolean(expectedType, receivedType)
1801    ) {
1802      message += " with value " + (styleValue(value, expectedType));
1803    }
1804    message += ", got " + receivedType + " ";
1805    // check if we need to specify received value
1806    if (isExplicable(receivedType)) {
1807      message += "with value " + (styleValue(value, receivedType)) + ".";
1808    }
1809    return message
1810  }
1811
1812  function styleValue (value, type) {
1813    if (type === 'String') {
1814      return ("\"" + value + "\"")
1815    } else if (type === 'Number') {
1816      return ("" + (Number(value)))
1817    } else {
1818      return ("" + value)
1819    }
1820  }
1821
1822  var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
1823  function isExplicable (value) {
1824    return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
1825  }
1826
1827  function isBoolean () {
1828    var args = [], len = arguments.length;
1829    while ( len-- ) args[ len ] = arguments[ len ];
1830
1831    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
1832  }
1833
1834  /*  */
1835
1836  function handleError (err, vm, info) {
1837    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
1838    // See: https://github.com/vuejs/vuex/issues/1505
1839    pushTarget();
1840    try {
1841      if (vm) {
1842        var cur = vm;
1843        while ((cur = cur.$parent)) {
1844          var hooks = cur.$options.errorCaptured;
1845          if (hooks) {
1846            for (var i = 0; i < hooks.length; i++) {
1847              try {
1848                var capture = hooks[i].call(cur, err, vm, info) === false;
1849                if (capture) { return }
1850              } catch (e) {
1851                globalHandleError(e, cur, 'errorCaptured hook');
1852              }
1853            }
1854          }
1855        }
1856      }
1857      globalHandleError(err, vm, info);
1858    } finally {
1859      popTarget();
1860    }
1861  }
1862
1863  function invokeWithErrorHandling (
1864    handler,
1865    context,
1866    args,
1867    vm,
1868    info
1869  ) {
1870    var res;
1871    try {

1872      res = args ? handler.apply(context, args) : handler.call(context);
1873      if (res && !res._isVue && isPromise(res) && !res._handled) {
1874        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
1875        // issue #9511
1876        // avoid catch triggering multiple times when nested calls
1877        res._handled = true;
1878      }
1879    } catch (e) {
1880      handleError(e, vm, info);
1881    }
1882    return res
1883  }
1884
1885  function globalHandleError (err, vm, info) {
1886    if (config.errorHandler) {
1887      try {
1888        return config.errorHandler.call(null, err, vm, info)
1889      } catch (e) {
1890        // if the user intentionally throws the original error in the handler,
1891        // do not log it twice
1892        if (e !== err) {
1893          logError(e, null, 'config.errorHandler');
1894        }
1895      }
1896    }
1897    logError(err, vm, info);
1898  }
1899
1900  function logError (err, vm, info) {
1901    {
1902      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
1903    }
1904    /* istanbul ignore else */
1905    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
1906      console.error(err);
1907    } else {
1908      throw err
1909    }
1910  }
1911
1912  /*  */
1913
1914  var isUsingMicroTask = false;
1915
1916  var callbacks = [];
1917  var pending = false;
1918
1919  function flushCallbacks () {
1920    pending = false;
1921    var copies = callbacks.slice(0);
1922    callbacks.length = 0;
1923    for (var i = 0; i < copies.length; i++) {
1924      copies[i]();
1925    }
1926  }
1927
1928  // Here we have async deferring wrappers using microtasks.
1929  // In 2.5 we used (macro) tasks (in combination with microtasks).
1930  // However, it has subtle problems when state is changed right before repaint
1931  // (e.g. #6813, out-in transitions).
1932  // Also, using (macro) tasks in event handler would cause some weird behaviors
1933  // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
1934  // So we now use microtasks everywhere, again.
1935  // A major drawback of this tradeoff is that there are some scenarios
1936  // where microtasks have too high a priority and fire in between supposedly
1937  // sequential events (e.g. #4521, #6690, which have workarounds)
1938  // or even between bubbling of the same event (#6566).
1939  var timerFunc;
1940
1941  // The nextTick behavior leverages the microtask queue, which can be accessed
1942  // via either native Promise.then or MutationObserver.
1943  // MutationObserver has wider support, however it is seriously bugged in
1944  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
1945  // completely stops working after triggering a few times... so, if native
1946  // Promise is available, we will use it:
1947  /* istanbul ignore next, $flow-disable-line */
1948  if (typeof Promise !== 'undefined' && isNative(Promise)) {
1949    var p = Promise.resolve();
1950    timerFunc = function () {
1951      p.then(flushCallbacks);
1952      // In problematic UIWebViews, Promise.then doesn't completely break, but
1953      // it can get stuck in a weird state where callbacks are pushed into the
1954      // microtask queue but the queue isn't being flushed, until the browser
1955      // needs to do some other work, e.g. handle a timer. Therefore we can
1956      // "force" the microtask queue to be flushed by adding an empty timer.
1957      if (isIOS) { setTimeout(noop); }
1958    };
1959    isUsingMicroTask = true;
1960  } else if (!isIE && typeof MutationObserver !== 'undefined' && (
1961    isNative(MutationObserver) ||
1962    // PhantomJS and iOS 7.x
1963    MutationObserver.toString() === '[object MutationObserverConstructor]'
1964  )) {
1965    // Use MutationObserver where native Promise is not available,
1966    // e.g. PhantomJS, iOS7, Android 4.4
1967    // (#6466 MutationObserver is unreliable in IE11)
1968    var counter = 1;
1969    var observer = new MutationObserver(flushCallbacks);
1970    var textNode = document.createTextNode(String(counter));
1971    observer.observe(textNode, {
1972      characterData: true
1973    });
1974    timerFunc = function () {
1975      counter = (counter + 1) % 2;
1976      textNode.data = String(counter);
1977    };
1978    isUsingMicroTask = true;
1979  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
1980    // Fallback to setImmediate.
1981    // Technically it leverages the (macro) task queue,
1982    // but it is still a better choice than setTimeout.

1983    timerFunc = function () {
1984      setImmediate(flushCallbacks);
1985    };
1986  } else {
1987    // Fallback to setTimeout.
1988    timerFunc = function () {
1989      setTimeout(flushCallbacks, 0);
1990    };
1991  }
1992
1993  function nextTick (cb, ctx) {
1994    var _resolve;
1995    callbacks.push(function () {
1996      if (cb) {
1997        try {
1998          cb.call(ctx);
1999        } catch (e) {
2000          handleError(e, ctx, 'nextTick');
2001        }
2002      } else if (_resolve) {
2003        _resolve(ctx);
2004      }
2005    });
2006    if (!pending) {
2007      pending = true;
2008      timerFunc();
2009    }
2010    // $flow-disable-line
2011    if (!cb && typeof Promise !== 'undefined') {
2012      return new Promise(function (resolve) {
2013        _resolve = resolve;
2014      })
2015    }
2016  }
2017
2018  /*  */
2019
2020  var mark;
2021  var measure;
2022
2023  {
2024    var perf = inBrowser && window.performance;
2025    /* istanbul ignore if */
2026    if (
2027      perf &&
2028      perf.mark &&
2029      perf.measure &&
2030      perf.clearMarks &&
2031      perf.clearMeasures
2032    ) {
2033      mark = function (tag) { return perf.mark(tag); };
2034      measure = function (name, startTag, endTag) {
2035        perf.measure(name, startTag, endTag);
2036        perf.clearMarks(startTag);
2037        perf.clearMarks(endTag);
2038        // perf.clearMeasures(name)
2039      };
2040    }
2041  }
2042
2043  /* not type checking this file because flow doesn't play well with Proxy */
2044
2045  var initProxy;
2046
2047  {
2048    var allowedGlobals = makeMap(
2049      'Infinity,undefined,NaN,isFinite,isNaN,' +
2050      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
2051      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
2052      'require' // for Webpack/Browserify
2053    );
2054
2055    var warnNonPresent = function (target, key) {
2056      warn(
2057        "Property or method \"" + key + "\" is not defined on the instance but " +
2058        'referenced during render. Make sure that this property is reactive, ' +
2059        'either in the data option, or for class-based components, by ' +
2060        'initializing the property. ' +
2061        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
2062        target
2063      );
2064    };
2065
2066    var warnReservedPrefix = function (target, key) {
2067      warn(
2068        "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
2069        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
2070        'prevent conflicts with Vue internals. ' +
2071        'See: https://vuejs.org/v2/api/#data',
2072        target
2073      );
2074    };
2075
2076    var hasProxy =
2077      typeof Proxy !== 'undefined' && isNative(Proxy);
2078
2079    if (hasProxy) {
2080      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
2081      config.keyCodes = new Proxy(config.keyCodes, {
2082        set: function set (target, key, value) {
2083          if (isBuiltInModifier(key)) {
2084            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
2085            return false
2086          } else {
2087            target[key] = value;
2088            return true
2089          }
2090        }
2091      });
2092    }
2093
2094    var hasHandler = {
2095      has: function has (target, key) {
2096        var has = key in target;
2097        var isAllowed = allowedGlobals(key) ||
2098          (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
2099        if (!has && !isAllowed) {
2100          if (key in target.$data) { warnReservedPrefix(target, key); }
2101          else { warnNonPresent(target, key); }
2102        }
2103        return has || !isAllowed
2104      }
2105    };
2106
2107    var getHandler = {
2108      get: function get (target, key) {
2109        if (typeof key === 'string' && !(key in target)) {
2110          if (key in target.$data) { warnReservedPrefix(target, key); }
2111          else { warnNonPresent(target, key); }
2112        }
2113        return target[key]
2114      }
2115    };
2116
2117    initProxy = function initProxy (vm) {
2118      if (hasProxy) {
2119        // determine which proxy handler to use
2120        var options = vm.$options;
2121        var handlers = options.render && options.render._withStripped
2122          ? getHandler
2123          : hasHandler;
2124        vm._renderProxy = new Proxy(vm, handlers);
2125      } else {
2126        vm._renderProxy = vm;
2127      }
2128    };
2129  }
2130
2131  /*  */
2132
2133  var seenObjects = new _Set();
2134
2135  /**
2136   * Recursively traverse an object to evoke all converted
2137   * getters, so that every nested property inside the object
2138   * is collected as a "deep" dependency.
2139   */
2140  function traverse (val) {
2141    _traverse(val, seenObjects);
2142    seenObjects.clear();
2143  }
2144
2145  function _traverse (val, seen) {
2146    var i, keys;
2147    var isA = Array.isArray(val);
2148    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
2149      return
2150    }
2151    if (val.__ob__) {
2152      var depId = val.__ob__.dep.id;
2153      if (seen.has(depId)) {
2154        return
2155      }
2156      seen.add(depId);
2157    }
2158    if (isA) {
2159      i = val.length;
2160      while (i--) { _traverse(val[i], seen); }
2161    } else {
2162      keys = Object.keys(val);
2163      i = keys.length;
2164      while (i--) { _traverse(val[keys[i]], seen); }
2165    }
2166  }
2167
2168  /*  */
2169
2170  var normalizeEvent = cached(function (name) {
2171    var passive = name.charAt(0) === '&';
2172    name = passive ? name.slice(1) : name;
2173    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
2174    name = once$$1 ? name.slice(1) : name;
2175    var capture = name.charAt(0) === '!';
2176    name = capture ? name.slice(1) : name;
2177    return {
2178      name: name,
2179      once: once$$1,
2180      capture: capture,
2181      passive: passive
2182    }
2183  });
2184
2185  function createFnInvoker (fns, vm) {
2186    function invoker () {
2187      var arguments$1 = arguments;
2188
2189      var fns = invoker.fns;
2190      if (Array.isArray(fns)) {
2191        var cloned = fns.slice();
2192        for (var i = 0; i < cloned.length; i++) {
2193          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
2194        }
2195      } else {
2196        // return handler return value for single handlers
2197        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
2198      }
2199    }
2200    invoker.fns = fns;
2201    return invoker
2202  }
2203
2204  function updateListeners (
2205    on,
2206    oldOn,
2207    add,
2208    remove$$1,
2209    createOnceHandler,
2210    vm
2211  ) {
2212    var name, def$$1, cur, old, event;
2213    for (name in on) {
2214      def$$1 = cur = on[name];
2215      old = oldOn[name];
2216      event = normalizeEvent(name);
2217      if (isUndef(cur)) {
2218        warn(
2219          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
2220          vm
2221        );
2222      } else if (isUndef(old)) {
2223        if (isUndef(cur.fns)) {
2224          cur = on[name] = createFnInvoker(cur, vm);
2225        }
2226        if (isTrue(event.once)) {
2227          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
2228        }
2229        add(event.name, cur, event.capture, event.passive, event.params);
2230      } else if (cur !== old) {
2231        old.fns = cur;
2232        on[name] = old;
2233      }
2234    }
2235    for (name in oldOn) {
2236      if (isUndef(on[name])) {
2237        event = normalizeEvent(name);
2238        remove$$1(event.name, oldOn[name], event.capture);
2239      }
2240    }
2241  }
2242
2243  /*  */
2244
2245  function mergeVNodeHook (def, hookKey, hook) {
2246    if (def instanceof VNode) {
2247      def = def.data.hook || (def.data.hook = {});
2248    }
2249    var invoker;
2250    var oldHook = def[hookKey];
2251
2252    function wrappedHook () {
2253      hook.apply(this, arguments);
2254      // important: remove merged hook to ensure it's called only once
2255      // and prevent memory leak
2256      remove(invoker.fns, wrappedHook);
2257    }
2258
2259    if (isUndef(oldHook)) {
2260      // no existing hook
2261      invoker = createFnInvoker([wrappedHook]);
2262    } else {
2263      /* istanbul ignore if */
2264      if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
2265        // already a merged invoker
2266        invoker = oldHook;
2267        invoker.fns.push(wrappedHook);
2268      } else {
2269        // existing plain hook
2270        invoker = createFnInvoker([oldHook, wrappedHook]);
2271      }
2272    }
2273
2274    invoker.merged = true;
2275    def[hookKey] = invoker;
2276  }
2277
2278  /*  */
2279
2280  function extractPropsFromVNodeData (
2281    data,
2282    Ctor,
2283    tag
2284  ) {
2285    // we are only extracting raw values here.
2286    // validation and default values are handled in the child
2287    // component itself.
2288    var propOptions = Ctor.options.props;
2289    if (isUndef(propOptions)) {
2290      return
2291    }
2292    var res = {};
2293    var attrs = data.attrs;
2294    var props = data.props;
2295    if (isDef(attrs) || isDef(props)) {
2296      for (var key in propOptions) {
2297        var altKey = hyphenate(key);
2298        {
2299          var keyInLowerCase = key.toLowerCase();
2300          if (
2301            key !== keyInLowerCase &&
2302            attrs && hasOwn(attrs, keyInLowerCase)
2303          ) {
2304            tip(
2305              "Prop \"" + keyInLowerCase + "\" is passed to component " +
2306              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
2307              " \"" + key + "\". " +
2308              "Note that HTML attributes are case-insensitive and camelCased " +
2309              "props need to use their kebab-case equivalents when using in-DOM " +
2310              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
2311            );
2312          }
2313        }
2314        checkProp(res, props, key, altKey, true) ||
2315        checkProp(res, attrs, key, altKey, false);
2316      }
2317    }
2318    return res
2319  }
2320
2321  function checkProp (
2322    res,
2323    hash,
2324    key,
2325    altKey,
2326    preserve
2327  ) {

2328    if (isDef(hash)) {
2329      if (hasOwn(hash, key)) {
2330        res[key] = hash[key];
2331        if (!preserve) {
2332          delete hash[key];
2333        }
2334        return true
2335      } else if (hasOwn(hash, altKey)) {
2336        res[key] = hash[altKey];
2337        if (!preserve) {
2338          delete hash[altKey];
2339        }
2340        return true
2341      }
2342    }
2343    return false
2344  }
2345
2346  /*  */
2347
2348  // The template compiler attempts to minimize the need for normalization by
2349  // statically analyzing the template at compile time.
2350  //
2351  // For plain HTML markup, normalization can be completely skipped because the
2352  // generated render function is guaranteed to return Array<VNode>. There are
2353  // two cases where extra normalization is needed:
2354
2355  // 1. When the children contains components - because a functional component
2356  // may return an Array instead of a single root. In this case, just a simple
2357  // normalization is needed - if any child is an Array, we flatten the whole
2358  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
2359  // because functional components already normalize their own children.
2360  function simpleNormalizeChildren (children) {
2361    for (var i = 0; i < children.length; i++) {
2362      if (Array.isArray(children[i])) {
2363        return Array.prototype.concat.apply([], children)
2364      }
2365    }
2366    return children
2367  }
2368
2369  // 2. When the children contains constructs that always generated nested Arrays,
2370  // e.g. <template>, <slot>, v-for, or when the children is provided by user
2371  // with hand-written render functions / JSX. In such cases a full normalization
2372  // is needed to cater to all possible types of children values.
2373  function normalizeChildren (children) {
2374    return isPrimitive(children)
2375      ? [createTextVNode(children)]
2376      : Array.isArray(children)
2377        ? normalizeArrayChildren(children)
2378        : undefined
2379  }
2380
2381  function isTextNode (node) {
2382    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
2383  }
2384
2385  function normalizeArrayChildren (children, nestedIndex) {
2386    var res = [];
2387    var i, c, lastIndex, last;
2388    for (i = 0; i < children.length; i++) {
2389      c = children[i];
2390      if (isUndef(c) || typeof c === 'boolean') { continue }
2391      lastIndex = res.length - 1;
2392      last = res[lastIndex];
2393      //  nested
2394      if (Array.isArray(c)) {
2395        if (c.length > 0) {
2396          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
2397          // merge adjacent text nodes
2398          if (isTextNode(c[0]) && isTextNode(last)) {
2399            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
2400            c.shift();
2401          }
2402          res.push.apply(res, c);
2403        }
2404      } else if (isPrimitive(c)) {
2405        if (isTextNode(last)) {
2406          // merge adjacent text nodes
2407          // this is necessary for SSR hydration because text nodes are
2408          // essentially merged when rendered to HTML strings
2409          res[lastIndex] = createTextVNode(last.text + c);
2410        } else if (c !== '') {
2411          // convert primitive to vnode
2412          res.push(createTextVNode(c));
2413        }
2414      } else {
2415        if (isTextNode(c) && isTextNode(last)) {
2416          // merge adjacent text nodes
2417          res[lastIndex] = createTextVNode(last.text + c.text);
2418        } else {
2419          // default key for nested array children (likely generated by v-for)
2420          if (isTrue(children._isVList) &&
2421            isDef(c.tag) &&
2422            isUndef(c.key) &&
2423            isDef(nestedIndex)) {
2424            c.key = "__vlist" + nestedIndex + "_" + i + "__";
2425          }
2426          res.push(c);
2427        }
2428      }
2429    }
2430    return res
2431  }
2432
2433  /*  */
2434
2435  function initProvide (vm) {
2436    var provide = vm.$options.provide;
2437    if (provide) {
2438      vm._provided = typeof provide === 'function'
2439        ? provide.call(vm)
2440        : provide;
2441    }
2442  }
2443
2444  function initInjections (vm) {
2445    var result = resolveInject(vm.$options.inject, vm);
2446    if (result) {
2447      toggleObserving(false);
2448      Object.keys(result).forEach(function (key) {
2449        /* istanbul ignore else */
2450        {
2451          defineReactive$$1(vm, key, result[key], function () {
2452            warn(
2453              "Avoid mutating an injected value directly since the changes will be " +
2454              "overwritten whenever the provided component re-renders. " +
2455              "injection being mutated: \"" + key + "\"",
2456              vm
2457            );
2458          });
2459        }
2460      });
2461      toggleObserving(true);
2462    }
2463  }
2464
2465  function resolveInject (inject, vm) {
2466    if (inject) {
2467      // inject is :any because flow is not smart enough to figure out cached
2468      var result = Object.create(null);
2469      var keys = hasSymbol
2470        ? Reflect.ownKeys(inject)
2471        : Object.keys(inject);
2472
2473      for (var i = 0; i < keys.length; i++) {
2474        var key = keys[i];
2475        // #6574 in case the inject object is observed...
2476        if (key === '__ob__') { continue }
2477        var provideKey = inject[key].from;
2478        var source = vm;
2479        while (source) {
2480          if (source._provided && hasOwn(source._provided, provideKey)) {
2481            result[key] = source._provided[provideKey];
2482            break
2483          }
2484          source = source.$parent;
2485        }
2486        if (!source) {
2487          if ('default' in inject[key]) {
2488            var provideDefault = inject[key].default;
2489            result[key] = typeof provideDefault === 'function'
2490              ? provideDefault.call(vm)
2491              : provideDefault;
2492          } else {
2493            warn(("Injection \"" + key + "\" not found"), vm);
2494          }
2495        }
2496      }
2497      return result
2498    }
2499  }
2500
2501  /*  */
2502
2503
2504
2505  /**
2506   * Runtime helper for resolving raw children VNodes into a slot object.
2507   */
2508  function resolveSlots (
2509    children,
2510    context
2511  ) {
2512    if (!children || !children.length) {
2513      return {}
2514    }
2515    var slots = {};
2516    for (var i = 0, l = children.length; i < l; i++) {
2517      var child = children[i];
2518      var data = child.data;
2519      // remove slot attribute if the node is resolved as a Vue slot node
2520      if (data && data.attrs && data.attrs.slot) {
2521        delete data.attrs.slot;
2522      }
2523      // named slots should only be respected if the vnode was rendered in the
2524      // same context.
2525      if ((child.context === context || child.fnContext === context) &&
2526        data && data.slot != null
2527      ) {
2528        var name = data.slot;
2529        var slot = (slots[name] || (slots[name] = []));
2530        if (child.tag === 'template') {
2531          slot.push.apply(slot, child.children || []);
2532        } else {
2533          slot.push(child);
2534        }
2535      } else {
2536        (slots.default || (slots.default = [])).push(child);
2537      }
2538    }
2539    // ignore slots that contains only whitespace
2540    for (var name$1 in slots) {
2541      if (slots[name$1].every(isWhitespace)) {
2542        delete slots[name$1];
2543      }
2544    }
2545    return slots
2546  }
2547
2548  function isWhitespace (node) {
2549    return (node.isComment && !node.asyncFactory) || node.text === ' '
2550  }
2551
2552  /*  */
2553
2554  function isAsyncPlaceholder (node) {
2555    return node.isComment && node.asyncFactory
2556  }
2557
2558  /*  */
2559
2560  function normalizeScopedSlots (
2561    slots,
2562    normalSlots,
2563    prevSlots
2564  ) {
2565    var res;
2566    var hasNormalSlots = Object.keys(normalSlots).length > 0;
2567    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
2568    var key = slots && slots.$key;
2569    if (!slots) {
2570      res = {};
2571    } else if (slots._normalized) {
2572      // fast path 1: child component re-render only, parent did not change
2573      return slots._normalized
2574    } else if (
2575      isStable &&
2576      prevSlots &&
2577      prevSlots !== emptyObject &&
2578      key === prevSlots.$key &&
2579      !hasNormalSlots &&
2580      !prevSlots.$hasNormal
2581    ) {
2582      // fast path 2: stable scoped slots w/ no normal slots to proxy,
2583      // only need to normalize once
2584      return prevSlots
2585    } else {
2586      res = {};
2587      for (var key$1 in slots) {
2588        if (slots[key$1] && key$1[0] !== '$') {
2589          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
2590        }
2591      }
2592    }
2593    // expose normal slots on scopedSlots
2594    for (var key$2 in normalSlots) {
2595      if (!(key$2 in res)) {
2596        res[key$2] = proxyNormalSlot(normalSlots, key$2);
2597      }
2598    }

2599    // avoriaz seems to mock a non-extensible $scopedSlots object
2600    // and when that is passed down this would cause an error
2601    if (slots && Object.isExtensible(slots)) {
2602      (slots)._normalized = res;
2603    }
2604    def(res, '$stable', isStable);
2605    def(res, '$key', key);
2606    def(res, '$hasNormal', hasNormalSlots);
2607    return res
2608  }
2609
2610  function normalizeScopedSlot(normalSlots, key, fn) {
2611    var normalized = function () {
2612      var res = arguments.length ? fn.apply(null, arguments) : fn({});
2613      res = res && typeof res === 'object' && !Array.isArray(res)
2614        ? [res] // single vnode
2615        : normalizeChildren(res);
2616      var vnode = res && res[0];
2617      return res && (
2618        !vnode ||
2619        (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
2620      ) ? undefined
2621        : res
2622    };
2623    // this is a slot using the new v-slot syntax without scope. although it is
2624    // compiled as a scoped slot, render fn users would expect it to be present
2625    // on this.$slots because the usage is semantically a normal slot.
2626    if (fn.proxy) {
2627      Object.defineProperty(normalSlots, key, {
2628        get: normalized,
2629        enumerable: true,
2630        configurable: true
2631      });
2632    }
2633    return normalized
2634  }
2635
2636  function proxyNormalSlot(slots, key) {
2637    return function () { return slots[key]; }
2638  }
2639
2640  /*  */
2641
2642  /**
2643   * Runtime helper for rendering v-for lists.
2644   */
2645  function renderList (
2646    val,
2647    render
2648  ) {
2649    var ret, i, l, keys, key;
2650    if (Array.isArray(val) || typeof val === 'string') {
2651      ret = new Array(val.length);
2652      for (i = 0, l = val.length; i < l; i++) {
2653        ret[i] = render(val[i], i);
2654      }
2655    } else if (typeof val === 'number') {
2656      ret = new Array(val);
2657      for (i = 0; i < val; i++) {
2658        ret[i] = render(i + 1, i);
2659      }
2660    } else if (isObject(val)) {
2661      if (hasSymbol && val[Symbol.iterator]) {
2662        ret = [];
2663        var iterator = val[Symbol.iterator]();
2664        var result = iterator.next();
2665        while (!result.done) {
2666          ret.push(render(result.value, ret.length));
2667          result = iterator.next();
2668        }
2669      } else {
2670        keys = Object.keys(val);
2671        ret = new Array(keys.length);
2672        for (i = 0, l = keys.length; i < l; i++) {
2673          key = keys[i];
2674          ret[i] = render(val[key], key, i);
2675        }
2676      }
2677    }
2678    if (!isDef(ret)) {
2679      ret = [];
2680    }
2681    (ret)._isVList = true;
2682    return ret
2683  }
2684
2685  /*  */
2686
2687  /**
2688   * Runtime helper for rendering <slot>
2689   */

2690  function renderSlot (
2691    name,
2692    fallbackRender,
2693    props,
2694    bindObject
2695  ) {
2696    var scopedSlotFn = this.$scopedSlots[name];
2697    var nodes;
2698    if (scopedSlotFn) {
2699      // scoped slot
2700      props = props || {};
2701      if (bindObject) {
2702        if (!isObject(bindObject)) {
2703          warn('slot v-bind without argument expects an Object', this);
2704        }
2705        props = extend(extend({}, bindObject), props);
2706      }
2707      nodes =
2708        scopedSlotFn(props) ||
2709        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
2710    } else {
2711      nodes =
2712        this.$slots[name] ||
2713        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
2714    }
2715
2716    var target = props && props.slot;
2717    if (target) {
2718      return this.$createElement('template', { slot: target }, nodes)
2719    } else {
2720      return nodes
2721    }
2722  }
2723
2724  /*  */
2725
2726  /**
2727   * Runtime helper for resolving filters
2728   */
2729  function resolveFilter (id) {
2730    return resolveAsset(this.$options, 'filters', id, true) || identity
2731  }
2732
2733  /*  */
2734
2735  function isKeyNotMatch (expect, actual) {
2736    if (Array.isArray(expect)) {
2737      return expect.indexOf(actual) === -1
2738    } else {
2739      return expect !== actual
2740    }
2741  }
2742
2743  /**
2744   * Runtime helper for checking keyCodes from config.
2745   * exposed as Vue.prototype._k
2746   * passing in eventKeyName as last argument separately for backwards compat
2747   */
2748  function checkKeyCodes (
2749    eventKeyCode,
2750    key,
2751    builtInKeyCode,
2752    eventKeyName,
2753    builtInKeyName
2754  ) {
2755    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
2756    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
2757      return isKeyNotMatch(builtInKeyName, eventKeyName)
2758    } else if (mappedKeyCode) {
2759      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
2760    } else if (eventKeyName) {
2761      return hyphenate(eventKeyName) !== key
2762    }

2763    return eventKeyCode === undefined
2764  }
2765
2766  /*  */
2767
2768  /**
2769   * Runtime helper for merging v-bind="object" into a VNode's data.
2770   */
2771  function bindObjectProps (
2772    data,
2773    tag,
2774    value,
2775    asProp,
2776    isSync
2777  ) {
2778    if (value) {
2779      if (!isObject(value)) {
2780        warn(
2781          'v-bind without argument expects an Object or Array value',
2782          this
2783        );
2784      } else {
2785        if (Array.isArray(value)) {
2786          value = toObject(value);
2787        }
2788        var hash;
2789        var loop = function ( key ) {
2790          if (
2791            key === 'class' ||
2792            key === 'style' ||
2793            isReservedAttribute(key)
2794          ) {
2795            hash = data;
2796          } else {
2797            var type = data.attrs && data.attrs.type;
2798            hash = asProp || config.mustUseProp(tag, type, key)
2799              ? data.domProps || (data.domProps = {})
2800              : data.attrs || (data.attrs = {});
2801          }
2802          var camelizedKey = camelize(key);
2803          var hyphenatedKey = hyphenate(key);
2804          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
2805            hash[key] = value[key];
2806
2807            if (isSync) {
2808              var on = data.on || (data.on = {});
2809              on[("update:" + key)] = function ($event) {
2810                value[key] = $event;
2811              };
2812            }
2813          }
2814        };
2815
2816        for (var key in value) loop( key );
2817      }
2818    }
2819    return data
2820  }
2821
2822  /*  */
2823
2824  /**
2825   * Runtime helper for rendering static trees.
2826   */

2827  function renderStatic (
2828    index,
2829    isInFor
2830  ) {
2831    var cached = this._staticTrees || (this._staticTrees = []);
2832    var tree = cached[index];
2833    // if has already-rendered static tree and not inside v-for,
2834    // we can reuse the same tree.
2835    if (tree && !isInFor) {
2836      return tree
2837    }
2838    // otherwise, render a fresh tree.
2839    tree = cached[index] = this.$options.staticRenderFns[index].call(
2840      this._renderProxy,
2841      null,
2842      this // for render fns generated for functional component templates
2843    );
2844    markStatic(tree, ("__static__" + index), false);
2845    return tree
2846  }
2847
2848  /**
2849   * Runtime helper for v-once.
2850   * Effectively it means marking the node as static with a unique key.
2851   */
2852  function markOnce (
2853    tree,
2854    index,
2855    key
2856  ) {
2857    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
2858    return tree
2859  }
2860
2861  function markStatic (
2862    tree,
2863    key,
2864    isOnce
2865  ) {
2866    if (Array.isArray(tree)) {
2867      for (var i = 0; i < tree.length; i++) {
2868        if (tree[i] && typeof tree[i] !== 'string') {
2869          markStaticNode(tree[i], (key + "_" + i), isOnce);
2870        }
2871      }
2872    } else {
2873      markStaticNode(tree, key, isOnce);
2874    }
2875  }
2876
2877  function markStaticNode (node, key, isOnce) {
2878    node.isStatic = true;
2879    node.key = key;
2880    node.isOnce = isOnce;
2881  }
2882
2883  /*  */
2884
2885  function bindObjectListeners (data, value) {
2886    if (value) {
2887      if (!isPlainObject(value)) {
2888        warn(
2889          'v-on without argument expects an Object value',
2890          this
2891        );
2892      } else {
2893        var on = data.on = data.on ? extend({}, data.on) : {};
2894        for (var key in value) {
2895          var existing = on[key];
2896          var ours = value[key];
2897          on[key] = existing ? [].concat(existing, ours) : ours;
2898        }
2899      }
2900    }
2901    return data
2902  }
2903
2904  /*  */
2905
2906  function resolveScopedSlots (
2907    fns, // see flow/vnode
2908    res,
2909    // the following are added in 2.6
2910    hasDynamicKeys,
2911    contentHashKey
2912  ) {
2913    res = res || { $stable: !hasDynamicKeys };
2914    for (var i = 0; i < fns.length; i++) {
2915      var slot = fns[i];
2916      if (Array.isArray(slot)) {
2917        resolveScopedSlots(slot, res, hasDynamicKeys);
2918      } else if (slot) {
2919        // marker for reverse proxying v-slot without scope on this.$slots
2920        if (slot.proxy) {
2921          slot.fn.proxy = true;
2922        }
2923        res[slot.key] = slot.fn;
2924      }
2925    }
2926    if (contentHashKey) {
2927      (res).$key = contentHashKey;
2928    }
2929    return res
2930  }
2931
2932  /*  */
2933
2934  function bindDynamicKeys (baseObj, values) {
2935    for (var i = 0; i < values.length; i += 2) {
2936      var key = values[i];
2937      if (typeof key === 'string' && key) {
2938        baseObj[values[i]] = values[i + 1];
2939      } else if (key !== '' && key !== null) {
2940        // null is a special value for explicitly removing a binding
2941        warn(
2942          ("Invalid value for dynamic directive argument (expected string or null): " + key),
2943          this
2944        );
2945      }
2946    }
2947    return baseObj
2948  }
2949
2950  // helper to dynamically append modifier runtime markers to event names.
2951  // ensure only append when value is already string, otherwise it will be cast
2952  // to string and cause the type check to miss.
2953  function prependModifier (value, symbol) {
2954    return typeof value === 'string' ? symbol + value : value
2955  }
2956
2957  /*  */
2958
2959  function installRenderHelpers (target) {
2960    target._o = markOnce;
2961    target._n = toNumber;
2962    target._s = toString;
2963    target._l = renderList;
2964    target._t = renderSlot;
2965    target._q = looseEqual;
2966    target._i = looseIndexOf;
2967    target._m = renderStatic;
2968    target._f = resolveFilter;
2969    target._k = checkKeyCodes;
2970    target._b = bindObjectProps;
2971    target._v = createTextVNode;
2972    target._e = createEmptyVNode;
2973    target._u = resolveScopedSlots;
2974    target._g = bindObjectListeners;
2975    target._d = bindDynamicKeys;
2976    target._p = prependModifier;
2977  }
2978
2979  /*  */
2980
2981  function FunctionalRenderContext (
2982    data,
2983    props,
2984    children,
2985    parent,
2986    Ctor
2987  ) {
2988    var this$1 = this;
2989
2990    var options = Ctor.options;
2991    // ensure the createElement function in functional components
2992    // gets a unique context - this is necessary for correct named slot check
2993    var contextVm;
2994    if (hasOwn(parent, '_uid')) {
2995      contextVm = Object.create(parent);
2996      // $flow-disable-line
2997      contextVm._original = parent;
2998    } else {
2999      // the context vm passed in is a functional context as well.
3000      // in this case we want to make sure we are able to get a hold to the
3001      // real context instance.
3002      contextVm = parent;
3003      // $flow-disable-line
3004      parent = parent._original;
3005    }
3006    var isCompiled = isTrue(options._compiled);
3007    var needNormalization = !isCompiled;
3008
3009    this.data = data;
3010    this.props = props;
3011    this.children = children;
3012    this.parent = parent;
3013    this.listeners = data.on || emptyObject;
3014    this.injections = resolveInject(options.inject, parent);
3015    this.slots = function () {
3016      if (!this$1.$slots) {
3017        normalizeScopedSlots(
3018          data.scopedSlots,
3019          this$1.$slots = resolveSlots(children, parent)
3020        );
3021      }
3022      return this$1.$slots
3023    };
3024
3025    Object.defineProperty(this, 'scopedSlots', ({
3026      enumerable: true,
3027      get: function get () {
3028        return normalizeScopedSlots(data.scopedSlots, this.slots())
3029      }
3030    }));
3031
3032    // support for compiled functional template
3033    if (isCompiled) {
3034      // exposing $options for renderStatic()
3035      this.$options = options;
3036      // pre-resolve slots for renderSlot()
3037      this.$slots = this.slots();
3038      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
3039    }
3040
3041    if (options._scopeId) {
3042      this._c = function (a, b, c, d) {
3043        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
3044        if (vnode && !Array.isArray(vnode)) {
3045          vnode.fnScopeId = options._scopeId;
3046          vnode.fnContext = parent;
3047        }
3048        return vnode
3049      };
3050    } else {
3051      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
3052    }
3053  }
3054
3055  installRenderHelpers(FunctionalRenderContext.prototype);
3056
3057  function createFunctionalComponent (
3058    Ctor,
3059    propsData,
3060    data,
3061    contextVm,
3062    children
3063  ) {
3064    var options = Ctor.options;
3065    var props = {};
3066    var propOptions = options.props;
3067    if (isDef(propOptions)) {
3068      for (var key in propOptions) {
3069        props[key] = validateProp(key, propOptions, propsData || emptyObject);
3070      }
3071    } else {
3072      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
3073      if (isDef(data.props)) { mergeProps(props, data.props); }
3074    }
3075
3076    var renderContext = new FunctionalRenderContext(
3077      data,
3078      props,
3079      children,
3080      contextVm,
3081      Ctor
3082    );
3083
3084    var vnode = options.render.call(null, renderContext._c, renderContext);
3085
3086    if (vnode instanceof VNode) {
3087      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
3088    } else if (Array.isArray(vnode)) {
3089      var vnodes = normalizeChildren(vnode) || [];
3090      var res = new Array(vnodes.length);
3091      for (var i = 0; i < vnodes.length; i++) {
3092        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
3093      }
3094      return res
3095    }
3096  }
3097
3098  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
3099    // #7817 clone node before setting fnContext, otherwise if the node is reused

3100    // (e.g. it was from a cached normal slot) the fnContext causes named slots
3101    // that should not be matched to match.
3102    var clone = cloneVNode(vnode);
3103    clone.fnContext = contextVm;
3104    clone.fnOptions = options;
3105    {
3106      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
3107    }
3108    if (data.slot) {
3109      (clone.data || (clone.data = {})).slot = data.slot;
3110    }
3111    return clone
3112  }
3113
3114  function mergeProps (to, from) {
3115    for (var key in from) {
3116      to[camelize(key)] = from[key];
3117    }
3118  }
3119
3120  /*  */
3121
3122  /*  */
3123
3124  /*  */
3125
3126  /*  */
3127
3128  // inline hooks to be invoked on component VNodes during patch
3129  var componentVNodeHooks = {
3130    init: function init (vnode, hydrating) {
3131      if (
3132        vnode.componentInstance &&
3133        !vnode.componentInstance._isDestroyed &&
3134        vnode.data.keepAlive
3135      ) {
3136        // kept-alive components, treat as a patch
3137        var mountedNode = vnode; // work around flow
3138        componentVNodeHooks.prepatch(mountedNode, mountedNode);
3139      } else {
3140        var child = vnode.componentInstance = createComponentInstanceForVnode(
3141          vnode,
3142          activeInstance
3143        );
3144        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
3145      }
3146    },
3147
3148    prepatch: function prepatch (oldVnode, vnode) {
3149      var options = vnode.componentOptions;
3150      var child = vnode.componentInstance = oldVnode.componentInstance;
3151      updateChildComponent(
3152        child,
3153        options.propsData, // updated props
3154        options.listeners, // updated listeners
3155        vnode, // new parent vnode
3156        options.children // new children
3157      );
3158    },
3159
3160    insert: function insert (vnode) {
3161      var context = vnode.context;
3162      var componentInstance = vnode.componentInstance;
3163      if (!componentInstance._isMounted) {
3164        componentInstance._isMounted = true;
3165        callHook(componentInstance, 'mounted');
3166      }
3167      if (vnode.data.keepAlive) {
3168        if (context._isMounted) {
3169          // vue-router#1212
3170          // During updates, a kept-alive component's child components may
3171          // change, so directly walking the tree here may call activated hooks
3172          // on incorrect children. Instead we push them into a queue which will
3173          // be processed after the whole patch process ended.
3174          queueActivatedComponent(componentInstance);
3175        } else {
3176          activateChildComponent(componentInstance, true /* direct */);
3177        }
3178      }
3179    },
3180
3181    destroy: function destroy (vnode) {
3182      var componentInstance = vnode.componentInstance;
3183      if (!componentInstance._isDestroyed) {
3184        if (!vnode.data.keepAlive) {
3185          componentInstance.$destroy();
3186        } else {
3187          deactivateChildComponent(componentInstance, true /* direct */);
3188        }
3189      }
3190    }
3191  };
3192
3193  var hooksToMerge = Object.keys(componentVNodeHooks);
3194
3195  function createComponent (
3196    Ctor,
3197    data,
3198    context,
3199    children,
3200    tag
3201  ) {
3202    if (isUndef(Ctor)) {
3203      return
3204    }
3205
3206    var baseCtor = context.$options._base;
3207
3208    // plain options object: turn it into a constructor
3209    if (isObject(Ctor)) {
3210      Ctor = baseCtor.extend(Ctor);
3211    }
3212
3213    // if at this stage it's not a constructor or an async component factory,
3214    // reject.
3215    if (typeof Ctor !== 'function') {
3216      {
3217        warn(("Invalid Component definition: " + (String(Ctor))), context);
3218      }
3219      return
3220    }
3221
3222    // async component
3223    var asyncFactory;
3224    if (isUndef(Ctor.cid)) {
3225      asyncFactory = Ctor;
3226      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
3227      if (Ctor === undefined) {
3228        // return a placeholder node for async component, which is rendered
3229        // as a comment node but preserves all the raw information for the node.
3230        // the information will be used for async server-rendering and hydration.
3231        return createAsyncPlaceholder(
3232          asyncFactory,
3233          data,
3234          context,
3235          children,
3236          tag
3237        )
3238      }
3239    }
3240
3241    data = data || {};
3242
3243    // resolve constructor options in case global mixins are applied after
3244    // component constructor creation
3245    resolveConstructorOptions(Ctor);
3246
3247    // transform component v-model data into props & events
3248    if (isDef(data.model)) {
3249      transformModel(Ctor.options, data);
3250    }
3251
3252    // extract props
3253    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
3254
3255    // functional component
3256    if (isTrue(Ctor.options.functional)) {
3257      return createFunctionalComponent(Ctor, propsData, data, context, children)
3258    }
3259
3260    // extract listeners, since these needs to be treated as
3261    // child component listeners instead of DOM listeners
3262    var listeners = data.on;
3263    // replace with listeners with .native modifier
3264    // so it gets processed during parent component patch.
3265    data.on = data.nativeOn;
3266
3267    if (isTrue(Ctor.options.abstract)) {
3268      // abstract components do not keep anything
3269      // other than props & listeners & slot
3270
3271      // work around flow
3272      var slot = data.slot;
3273      data = {};
3274      if (slot) {
3275        data.slot = slot;
3276      }
3277    }
3278

3279    // install component management hooks onto the placeholder node
3280    installComponentHooks(data);
3281
3282    // return a placeholder vnode
3283    var name = Ctor.options.name || tag;
3284    var vnode = new VNode(
3285      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
3286      data, undefined, undefined, undefined, context,
3287      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
3288      asyncFactory
3289    );
3290
3291    return vnode
3292  }
3293
3294  function createComponentInstanceForVnode (
3295    // we know it's MountedComponentVNode but flow doesn't
3296    vnode,
3297    // activeInstance in lifecycle state
3298    parent
3299  ) {
3300    var options = {
3301      _isComponent: true,
3302      _parentVnode: vnode,
3303      parent: parent
3304    };
3305    // check inline-template render functions
3306    var inlineTemplate = vnode.data.inlineTemplate;
3307    if (isDef(inlineTemplate)) {
3308      options.render = inlineTemplate.render;
3309      options.staticRenderFns = inlineTemplate.staticRenderFns;
3310    }
3311    return new vnode.componentOptions.Ctor(options)
3312  }
3313
3314  function installComponentHooks (data) {
3315    var hooks = data.hook || (data.hook = {});
3316    for (var i = 0; i < hooksToMerge.length; i++) {
3317      var key = hooksToMerge[i];
3318      var existing = hooks[key];
3319      var toMerge = componentVNodeHooks[key];
3320      if (existing !== toMerge && !(existing && existing._merged)) {
3321        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
3322      }
3323    }
3324  }
3325
3326  function mergeHook$1 (f1, f2) {
3327    var merged = function (a, b) {
3328      // flow complains about extra args which is why we use any
3329      f1(a, b);
3330      f2(a, b);
3331    };
3332    merged._merged = true;
3333    return merged
3334  }
3335
3336  // transform component v-model info (value and callback) into
3337  // prop and event handler respectively.
3338  function transformModel (options, data) {
3339    var prop = (options.model && options.model.prop) || 'value';
3340    var event = (options.model && options.model.event) || 'input'
3341    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
3342    var on = data.on || (data.on = {});
3343    var existing = on[event];
3344    var callback = data.model.callback;
3345    if (isDef(existing)) {
3346      if (
3347        Array.isArray(existing)
3348          ? existing.indexOf(callback) === -1
3349          : existing !== callback
3350      ) {
3351        on[event] = [callback].concat(existing);
3352      }
3353    } else {
3354      on[event] = callback;
3355    }
3356  }
3357
3358  /*  */
3359
3360  var SIMPLE_NORMALIZE = 1;
3361  var ALWAYS_NORMALIZE = 2;
3362
3363  // wrapper function for providing a more flexible interface
3364  // without getting yelled at by flow
3365  function createElement (
3366    context,
3367    tag,
3368    data,
3369    children,
3370    normalizationType,
3371    alwaysNormalize
3372  ) {
3373    if (Array.isArray(data) || isPrimitive(data)) {
3374      normalizationType = children;
3375      children = data;
3376      data = undefined;
3377    }
3378    if (isTrue(alwaysNormalize)) {
3379      normalizationType = ALWAYS_NORMALIZE;
3380    }
3381    return _createElement(context, tag, data, children, normalizationType)
3382  }
3383
3384  function _createElement (
3385    context,
3386    tag,
3387    data,
3388    children,
3389    normalizationType
3390  ) {
3391    if (isDef(data) && isDef((data).__ob__)) {
3392      warn(
3393        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
3394        'Always create fresh vnode data objects in each render!',
3395        context
3396      );
3397      return createEmptyVNode()
3398    }
3399    // object syntax in v-bind
3400    if (isDef(data) && isDef(data.is)) {
3401      tag = data.is;
3402    }
3403    if (!tag) {
3404      // in case of component :is set to falsy value
3405      return createEmptyVNode()
3406    }
3407    // warn against non-primitive key
3408    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
3409    ) {
3410      {
3411        warn(
3412          'Avoid using non-primitive value as key, ' +
3413          'use string/number value instead.',
3414          context
3415        );
3416      }
3417    }
3418    // support single function children as default scoped slot
3419    if (Array.isArray(children) &&
3420      typeof children[0] === 'function'
3421    ) {
3422      data = data || {};
3423      data.scopedSlots = { default: children[0] };
3424      children.length = 0;
3425    }
3426    if (normalizationType === ALWAYS_NORMALIZE) {
3427      children = normalizeChildren(children);
3428    } else if (normalizationType === SIMPLE_NORMALIZE) {
3429      children = simpleNormalizeChildren(children);
3430    }
3431    var vnode, ns;
3432    if (typeof tag === 'string') {
3433      var Ctor;
3434      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
3435      if (config.isReservedTag(tag)) {
3436        // platform built-in elements
3437        if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
3438          warn(

3439            ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
3440            context
3441          );
3442        }
3443        vnode = new VNode(
3444          config.parsePlatformTagName(tag), data, children,
3445          undefined, undefined, context
3446        );
3447      } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
3448        // component
3449        vnode = createComponent(Ctor, data, context, children, tag);
3450      } else {
3451        // unknown or unlisted namespaced elements
3452        // check at runtime because it may get assigned a namespace when its
3453        // parent normalizes children
3454        vnode = new VNode(
3455          tag, data, children,
3456          undefined, undefined, context
3457        );
3458      }
3459    } else {
3460      // direct component options / constructor
3461      vnode = createComponent(tag, data, context, children);
3462    }
3463    if (Array.isArray(vnode)) {
3464      return vnode
3465    } else if (isDef(vnode)) {
3466      if (isDef(ns)) { applyNS(vnode, ns); }
3467      if (isDef(data)) { registerDeepBindings(data); }
3468      return vnode
3469    } else {
3470      return createEmptyVNode()
3471    }
3472  }
3473
3474  function applyNS (vnode, ns, force) {
3475    vnode.ns = ns;
3476    if (vnode.tag === 'foreignObject') {
3477      // use default namespace inside foreignObject
3478      ns = undefined;
3479      force = true;
3480    }

3481    if (isDef(vnode.children)) {
3482      for (var i = 0, l = vnode.children.length; i < l; i++) {
3483        var child = vnode.children[i];
3484        if (isDef(child.tag) && (
3485          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
3486          applyNS(child, ns, force);
3487        }
3488      }
3489    }
3490  }
3491
3492  // ref #5318
3493  // necessary to ensure parent re-render when deep bindings like :style and
3494  // :class are used on slot nodes
3495  function registerDeepBindings (data) {
3496    if (isObject(data.style)) {
3497      traverse(data.style);
3498    }
3499    if (isObject(data.class)) {
3500      traverse(data.class);
3501    }
3502  }
3503
3504  /*  */
3505
3506  function initRender (vm) {
3507    vm._vnode = null; // the root of the child tree
3508    vm._staticTrees = null; // v-once cached trees
3509    var options = vm.$options;
3510    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
3511    var renderContext = parentVnode && parentVnode.context;
3512    vm.$slots = resolveSlots(options._renderChildren, renderContext);
3513    vm.$scopedSlots = emptyObject;
3514    // bind the createElement fn to this instance
3515    // so that we get proper render context inside it.
3516    // args order: tag, data, children, normalizationType, alwaysNormalize
3517    // internal version is used by render functions compiled from templates
3518    vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
3519    // normalization is always applied for the public version, used in
3520    // user-written render functions.
3521    vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
3522
3523    // $attrs & $listeners are exposed for easier HOC creation.
3524    // they need to be reactive so that HOCs using them are always updated
3525    var parentData = parentVnode && parentVnode.data;
3526
3527    /* istanbul ignore else */
3528    {
3529      defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
3530        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
3531      }, true);
3532      defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
3533        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
3534      }, true);
3535    }
3536  }
3537
3538  var currentRenderingInstance = null;
3539
3540  function renderMixin (Vue) {
3541    // install runtime convenience helpers
3542    installRenderHelpers(Vue.prototype);
3543
3544    Vue.prototype.$nextTick = function (fn) {
3545      return nextTick(fn, this)
3546    };
3547
3548    Vue.prototype._render = function () {
3549      var vm = this;
3550      var ref = vm.$options;
3551      var render = ref.render;
3552      var _parentVnode = ref._parentVnode;
3553
3554      if (_parentVnode) {
3555        vm.$scopedSlots = normalizeScopedSlots(
3556          _parentVnode.data.scopedSlots,
3557          vm.$slots,
3558          vm.$scopedSlots
3559        );
3560      }
3561
3562      // set parent vnode. this allows render functions to have access
3563      // to the data on the placeholder node.
3564      vm.$vnode = _parentVnode;
3565      // render self
3566      var vnode;
3567      try {
3568        // There's no need to maintain a stack because all render fns are called
3569        // separately from one another. Nested component's render fns are called
3570        // when parent component is patched.
3571        currentRenderingInstance = vm;
3572        vnode = render.call(vm._renderProxy, vm.$createElement);
3573      } catch (e) {
3574        handleError(e, vm, "render");
3575        // return error render result,
3576        // or previous vnode to prevent render error causing blank component
3577        /* istanbul ignore else */
3578        if (vm.$options.renderError) {
3579          try {
3580            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
3581          } catch (e) {
3582            handleError(e, vm, "renderError");
3583            vnode = vm._vnode;
3584          }
3585        } else {
3586          vnode = vm._vnode;
3587        }
3588      } finally {
3589        currentRenderingInstance = null;
3590      }
3591      // if the returned array contains only a single node, allow it
3592      if (Array.isArray(vnode) && vnode.length === 1) {
3593        vnode = vnode[0];
3594      }
3595      // return empty vnode in case the render function errored out
3596      if (!(vnode instanceof VNode)) {
3597        if (Array.isArray(vnode)) {
3598          warn(
3599            'Multiple root nodes returned from render function. Render function ' +
3600            'should return a single root node.',
3601            vm
3602          );
3603        }
3604        vnode = createEmptyVNode();
3605      }
3606      // set parent
3607      vnode.parent = _parentVnode;
3608      return vnode
3609    };
3610  }
3611
3612  /*  */
3613
3614  function ensureCtor (comp, base) {
3615    if (
3616      comp.__esModule ||
3617      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
3618    ) {
3619      comp = comp.default;
3620    }
3621    return isObject(comp)
3622      ? base.extend(comp)
3623      : comp
3624  }
3625
3626  function createAsyncPlaceholder (
3627    factory,
3628    data,
3629    context,
3630    children,
3631    tag
3632  ) {
3633    var node = createEmptyVNode();
3634    node.asyncFactory = factory;
3635    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
3636    return node
3637  }
3638
3639  function resolveAsyncComponent (
3640    factory,
3641    baseCtor
3642  ) {
3643    if (isTrue(factory.error) && isDef(factory.errorComp)) {
3644      return factory.errorComp
3645    }
3646
3647    if (isDef(factory.resolved)) {
3648      return factory.resolved
3649    }
3650
3651    var owner = currentRenderingInstance;

3652    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
3653      // already pending
3654      factory.owners.push(owner);
3655    }
3656
3657    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
3658      return factory.loadingComp
3659    }
3660
3661    if (owner && !isDef(factory.owners)) {
3662      var owners = factory.owners = [owner];
3663      var sync = true;
3664      var timerLoading = null;
3665      var timerTimeout = null
3666
3667      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
3668
3669      var forceRender = function (renderCompleted) {
3670        for (var i = 0, l = owners.length; i < l; i++) {
3671          (owners[i]).$forceUpdate();
3672        }
3673
3674        if (renderCompleted) {
3675          owners.length = 0;
3676          if (timerLoading !== null) {
3677            clearTimeout(timerLoading);
3678            timerLoading = null;
3679          }
3680          if (timerTimeout !== null) {
3681            clearTimeout(timerTimeout);
3682            timerTimeout = null;
3683          }
3684        }
3685      };
3686
3687      var resolve = once(function (res) {
3688        // cache resolved
3689        factory.resolved = ensureCtor(res, baseCtor);
3690        // invoke callbacks only if this is not a synchronous resolve
3691        // (async resolves are shimmed as synchronous during SSR)
3692        if (!sync) {
3693          forceRender(true);
3694        } else {
3695          owners.length = 0;
3696        }
3697      });
3698
3699      var reject = once(function (reason) {
3700        warn(
3701          "Failed to resolve async component: " + (String(factory)) +
3702          (reason ? ("\nReason: " + reason) : '')
3703        );
3704        if (isDef(factory.errorComp)) {
3705          factory.error = true;
3706          forceRender(true);
3707        }
3708      });
3709
3710      var res = factory(resolve, reject);
3711
3712      if (isObject(res)) {
3713        if (isPromise(res)) {
3714          // () => Promise
3715          if (isUndef(factory.resolved)) {
3716            res.then(resolve, reject);
3717          }
3718        } else if (isPromise(res.component)) {
3719          res.component.then(resolve, reject);
3720
3721          if (isDef(res.error)) {
3722            factory.errorComp = ensureCtor(res.error, baseCtor);
3723          }
3724
3725          if (isDef(res.loading)) {
3726            factory.loadingComp = ensureCtor(res.loading, baseCtor);
3727            if (res.delay === 0) {
3728              factory.loading = true;
3729            } else {
3730              timerLoading = setTimeout(function () {
3731                timerLoading = null;
3732                if (isUndef(factory.resolved) && isUndef(factory.error)) {
3733                  factory.loading = true;
3734                  forceRender(false);
3735                }
3736              }, res.delay || 200);
3737            }
3738          }
3739
3740          if (isDef(res.timeout)) {
3741            timerTimeout = setTimeout(function () {
3742              timerTimeout = null;
3743              if (isUndef(factory.resolved)) {
3744                reject(
3745                  "timeout (" + (res.timeout) + "ms)"
3746                );
3747              }
3748            }, res.timeout);
3749          }
3750        }
3751      }
3752
3753      sync = false;
3754      // return in case resolved synchronously
3755      return factory.loading
3756        ? factory.loadingComp
3757        : factory.resolved
3758    }
3759  }
3760
3761  /*  */
3762
3763  function getFirstComponentChild (children) {
3764    if (Array.isArray(children)) {
3765      for (var i = 0; i < children.length; i++) {
3766        var c = children[i];
3767        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
3768          return c
3769        }
3770      }
3771    }
3772  }
3773
3774  /*  */
3775
3776  /*  */
3777
3778  function initEvents (vm) {
3779    vm._events = Object.create(null);
3780    vm._hasHookEvent = false;
3781    // init parent attached events
3782    var listeners = vm.$options._parentListeners;
3783    if (listeners) {
3784      updateComponentListeners(vm, listeners);
3785    }
3786  }
3787
3788  var target;
3789
3790  function add (event, fn) {
3791    target.$on(event, fn);
3792  }
3793
3794  function remove$1 (event, fn) {
3795    target.$off(event, fn);
3796  }
3797
3798  function createOnceHandler (event, fn) {
3799    var _target = target;
3800    return function onceHandler () {
3801      var res = fn.apply(null, arguments);
3802      if (res !== null) {
3803        _target.$off(event, onceHandler);
3804      }
3805    }
3806  }
3807
3808  function updateComponentListeners (
3809    vm,
3810    listeners,
3811    oldListeners
3812  ) {
3813    target = vm;
3814    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
3815    target = undefined;
3816  }
3817
3818  function eventsMixin (Vue) {
3819    var hookRE = /^hook:/;
3820    Vue.prototype.$on = function (event, fn) {
3821      var vm = this;
3822      if (Array.isArray(event)) {
3823        for (var i = 0, l = event.length; i < l; i++) {
3824          vm.$on(event[i], fn);
3825        }
3826      } else {
3827        (vm._events[event] || (vm._events[event] = [])).push(fn);
3828        // optimize hook:event cost by using a boolean flag marked at registration
3829        // instead of a hash lookup
3830        if (hookRE.test(event)) {
3831          vm._hasHookEvent = true;
3832        }
3833      }
3834      return vm
3835    };
3836
3837    Vue.prototype.$once = function (event, fn) {
3838      var vm = this;
3839      function on () {
3840        vm.$off(event, on);
3841        fn.apply(vm, arguments);
3842      }
3843      on.fn = fn;
3844      vm.$on(event, on);
3845      return vm
3846    };
3847
3848    Vue.prototype.$off = function (event, fn) {
3849      var vm = this;
3850      // all
3851      if (!arguments.length) {
3852        vm._events = Object.create(null);
3853        return vm
3854      }
3855      // array of events
3856      if (Array.isArray(event)) {
3857        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
3858          vm.$off(event[i$1], fn);
3859        }
3860        return vm
3861      }
3862      // specific event
3863      var cbs = vm._events[event];
3864      if (!cbs) {
3865        return vm
3866      }
3867      if (!fn) {
3868        vm._events[event] = null;
3869        return vm
3870      }
3871      // specific handler
3872      var cb;
3873      var i = cbs.length;
3874      while (i--) {
3875        cb = cbs[i];

3876        if (cb === fn || cb.fn === fn) {
3877          cbs.splice(i, 1);
3878          break
3879        }
3880      }
3881      return vm
3882    };
3883
3884    Vue.prototype.$emit = function (event) {
3885      var vm = this;
3886      {
3887        var lowerCaseEvent = event.toLowerCase();
3888        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
3889          tip(
3890            "Event \"" + lowerCaseEvent + "\" is emitted in component " +
3891            (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
3892            "Note that HTML attributes are case-insensitive and you cannot use " +
3893            "v-on to listen to camelCase events when using in-DOM templates. " +
3894            "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
3895          );
3896        }
3897      }
3898      var cbs = vm._events[event];
3899      if (cbs) {
3900        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
3901        var args = toArray(arguments, 1);
3902        var info = "event handler for \"" + event + "\"";
3903        for (var i = 0, l = cbs.length; i < l; i++) {
3904          invokeWithErrorHandling(cbs[i], vm, args, vm, info);
3905        }
3906      }
3907      return vm
3908    };
3909  }
3910
3911  /*  */
3912
3913  var activeInstance = null;
3914  var isUpdatingChildComponent = false;
3915
3916  function setActiveInstance(vm) {
3917    var prevActiveInstance = activeInstance;
3918    activeInstance = vm;
3919    return function () {
3920      activeInstance = prevActiveInstance;
3921    }
3922  }
3923
3924  function initLifecycle (vm) {
3925    var options = vm.$options;
3926
3927    // locate first non-abstract parent
3928    var parent = options.parent;
3929    if (parent && !options.abstract) {
3930      while (parent.$options.abstract && parent.$parent) {
3931        parent = parent.$parent;
3932      }
3933      parent.$children.push(vm);
3934    }
3935
3936    vm.$parent = parent;
3937    vm.$root = parent ? parent.$root : vm;
3938
3939    vm.$children = [];
3940    vm.$refs = {};
3941
3942    vm._watcher = null;
3943    vm._inactive = null;
3944    vm._directInactive = false;
3945    vm._isMounted = false;
3946    vm._isDestroyed = false;
3947    vm._isBeingDestroyed = false;
3948  }
3949
3950  function lifecycleMixin (Vue) {
3951    Vue.prototype._update = function (vnode, hydrating) {
3952      var vm = this;
3953      var prevEl = vm.$el;
3954      var prevVnode = vm._vnode;
3955      var restoreActiveInstance = setActiveInstance(vm);
3956      vm._vnode = vnode;
3957      // Vue.prototype.__patch__ is injected in entry points
3958      // based on the rendering backend used.
3959      if (!prevVnode) {
3960        // initial render
3961        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
3962      } else {
3963        // updates
3964        vm.$el = vm.__patch__(prevVnode, vnode);
3965      }
3966      restoreActiveInstance();
3967      // update __vue__ reference
3968      if (prevEl) {
3969        prevEl.__vue__ = null;
3970      }
3971      if (vm.$el) {
3972        vm.$el.__vue__ = vm;
3973      }
3974      // if parent is an HOC, update its $el as well
3975      if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
3976        vm.$parent.$el = vm.$el;
3977      }
3978      // updated hook is called by the scheduler to ensure that children are
3979      // updated in a parent's updated hook.
3980    };
3981
3982    Vue.prototype.$forceUpdate = function () {
3983      var vm = this;
3984      if (vm._watcher) {
3985        vm._watcher.update();
3986      }
3987    };
3988
3989    Vue.prototype.$destroy = function () {
3990      var vm = this;
3991      if (vm._isBeingDestroyed) {
3992        return
3993      }
3994      callHook(vm, 'beforeDestroy');
3995      vm._isBeingDestroyed = true;
3996      // remove self from parent
3997      var parent = vm.$parent;
3998      if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
3999        remove(parent.$children, vm);
4000      }
4001      // teardown watchers
4002      if (vm._watcher) {
4003        vm._watcher.teardown();
4004      }
4005      var i = vm._watchers.length;
4006      while (i--) {
4007        vm._watchers[i].teardown();
4008      }
4009      // remove reference from data ob
4010      // frozen object may not have observer.
4011      if (vm._data.__ob__) {
4012        vm._data.__ob__.vmCount--;
4013      }
4014      // call the last hook...
4015      vm._isDestroyed = true;
4016      // invoke destroy hooks on current rendered tree
4017      vm.__patch__(vm._vnode, null);
4018      // fire destroyed hook
4019      callHook(vm, 'destroyed');
4020      // turn off all instance listeners.
4021      vm.$off();
4022      // remove __vue__ reference
4023      if (vm.$el) {
4024        vm.$el.__vue__ = null;
4025      }
4026      // release circular reference (#6759)
4027      if (vm.$vnode) {
4028        vm.$vnode.parent = null;
4029      }
4030    };
4031  }
4032
4033  function mountComponent (
4034    vm,
4035    el,
4036    hydrating
4037  ) {
4038    vm.$el = el;
4039    if (!vm.$options.render) {
4040      vm.$options.render = createEmptyVNode;
4041      {
4042        /* istanbul ignore if */
4043        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
4044          vm.$options.el || el) {
4045          warn(
4046            'You are using the runtime-only build of Vue where the template ' +
4047            'compiler is not available. Either pre-compile the templates into ' +
4048            'render functions, or use the compiler-included build.',
4049            vm
4050          );
4051        } else {
4052          warn(
4053            'Failed to mount component: template or render function not defined.',
4054            vm
4055          );
4056        }
4057      }
4058    }
4059    callHook(vm, 'beforeMount');
4060
4061    var updateComponent;
4062    /* istanbul ignore if */
4063    if (config.performance && mark) {
4064      updateComponent = function () {
4065        var name = vm._name;
4066        var id = vm._uid;
4067        var startTag = "vue-perf-start:" + id;
4068        var endTag = "vue-perf-end:" + id;
4069
4070        mark(startTag);
4071        var vnode = vm._render();
4072        mark(endTag);
4073        measure(("vue " + name + " render"), startTag, endTag);
4074
4075        mark(startTag);
4076        vm._update(vnode, hydrating);
4077        mark(endTag);
4078        measure(("vue " + name + " patch"), startTag, endTag);
4079      };
4080    } else {
4081      updateComponent = function () {
4082        vm._update(vm._render(), hydrating);
4083      };
4084    }
4085
4086    // we set this to vm._watcher inside the watcher's constructor
4087    // since the watcher's initial patch may call $forceUpdate (e.g. inside child
4088    // component's mounted hook), which relies on vm._watcher being already defined
4089    new Watcher(vm, updateComponent, noop, {
4090      before: function before () {
4091        if (vm._isMounted && !vm._isDestroyed) {
4092          callHook(vm, 'beforeUpdate');
4093        }
4094      }
4095    }, true /* isRenderWatcher */);
4096    hydrating = false;

4097
4098    // manually mounted instance, call mounted on self
4099    // mounted is called for render-created child components in its inserted hook
4100    if (vm.$vnode == null) {
4101      vm._isMounted = true;
4102      callHook(vm, 'mounted');
4103    }
4104    return vm
4105  }
4106
4107  function updateChildComponent (
4108    vm,
4109    propsData,
4110    listeners,
4111    parentVnode,
4112    renderChildren
4113  ) {
4114    {
4115      isUpdatingChildComponent = true;
4116    }
4117
4118    // determine whether component has slot children
4119    // we need to do this before overwriting $options._renderChildren.
4120
4121    // check if there are dynamic scopedSlots (hand-written or compiled but with
4122    // dynamic slot names). Static scoped slots compiled from template has the
4123    // "$stable" marker.
4124    var newScopedSlots = parentVnode.data.scopedSlots;
4125    var oldScopedSlots = vm.$scopedSlots;
4126    var hasDynamicScopedSlot = !!(
4127      (newScopedSlots && !newScopedSlots.$stable) ||
4128      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
4129      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
4130      (!newScopedSlots && vm.$scopedSlots.$key)
4131    );
4132
4133    // Any static slot children from the parent may have changed during parent's
4134    // update. Dynamic scoped slots may also have changed. In such cases, a forced
4135    // update is necessary to ensure correctness.
4136    var needsForceUpdate = !!(
4137      renderChildren ||               // has new static slots
4138      vm.$options._renderChildren ||  // has old static slots
4139      hasDynamicScopedSlot
4140    );
4141
4142    vm.$options._parentVnode = parentVnode;
4143    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
4144
4145    if (vm._vnode) { // update child tree's parent
4146      vm._vnode.parent = parentVnode;
4147    }
4148    vm.$options._renderChildren = renderChildren;
4149
4150    // update $attrs and $listeners hash
4151    // these are also reactive so they may trigger child update if the child
4152    // used them during render
4153    vm.$attrs = parentVnode.data.attrs || emptyObject;
4154    vm.$listeners = listeners || emptyObject;
4155
4156    // update props
4157    if (propsData && vm.$options.props) {
4158      toggleObserving(false);
4159      var props = vm._props;
4160      var propKeys = vm.$options._propKeys || [];
4161      for (var i = 0; i < propKeys.length; i++) {
4162        var key = propKeys[i];
4163        var propOptions = vm.$options.props; // wtf flow?
4164        props[key] = validateProp(key, propOptions, propsData, vm);
4165      }
4166      toggleObserving(true);
4167      // keep a copy of raw propsData
4168      vm.$options.propsData = propsData;
4169    }
4170
4171    // update listeners
4172    listeners = listeners || emptyObject;
4173    var oldListeners = vm.$options._parentListeners;
4174    vm.$options._parentListeners = listeners;
4175    updateComponentListeners(vm, listeners, oldListeners);
4176
4177    // resolve slots + force update if has children
4178    if (needsForceUpdate) {
4179      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
4180      vm.$forceUpdate();
4181    }
4182
4183    {
4184      isUpdatingChildComponent = false;
4185    }
4186  }
4187
4188  function isInInactiveTree (vm) {
4189    while (vm && (vm = vm.$parent)) {
4190      if (vm._inactive) { return true }
4191    }
4192    return false
4193  }
4194
4195  function activateChildComponent (vm, direct) {
4196    if (direct) {
4197      vm._directInactive = false;
4198      if (isInInactiveTree(vm)) {
4199        return
4200      }
4201    } else if (vm._directInactive) {
4202      return
4203    }
4204    if (vm._inactive || vm._inactive === null) {
4205      vm._inactive = false;
4206      for (var i = 0; i < vm.$children.length; i++) {
4207        activateChildComponent(vm.$children[i]);
4208      }
4209      callHook(vm, 'activated');
4210    }
4211  }
4212
4213  function deactivateChildComponent (vm, direct) {
4214    if (direct) {
4215      vm._directInactive = true;
4216      if (isInInactiveTree(vm)) {
4217        return
4218      }
4219    }
4220    if (!vm._inactive) {
4221      vm._inactive = true;
4222      for (var i = 0; i < vm.$children.length; i++) {
4223        deactivateChildComponent(vm.$children[i]);
4224      }
4225      callHook(vm, 'deactivated');
4226    }
4227  }
4228
4229  function callHook (vm, hook) {
4230    // #7573 disable dep collection when invoking lifecycle hooks
4231    pushTarget();
4232    var handlers = vm.$options[hook];
4233    var info = hook + " hook";
4234    if (handlers) {
4235      for (var i = 0, j = handlers.length; i < j; i++) {
4236        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
4237      }
4238    }
4239    if (vm._hasHookEvent) {
4240      vm.$emit('hook:' + hook);
4241    }
4242    popTarget();
4243  }
4244
4245  /*  */
4246
4247  var MAX_UPDATE_COUNT = 100;
4248
4249  var queue = [];
4250  var activatedChildren = [];
4251  var has = {};
4252  var circular = {};
4253  var waiting = false;

4254  var flushing = false;
4255  var index = 0;
4256
4257  /**
4258   * Reset the scheduler's state.
4259   */
4260  function resetSchedulerState () {
4261    index = queue.length = activatedChildren.length = 0;
4262    has = {};
4263    {
4264      circular = {};
4265    }
4266    waiting = flushing = false;
4267  }
4268
4269  // Async edge case #6566 requires saving the timestamp when event listeners are
4270  // attached. However, calling performance.now() has a perf overhead especially
4271  // if the page has thousands of event listeners. Instead, we take a timestamp
4272  // every time the scheduler flushes and use that for all event listeners
4273  // attached during that flush.
4274  var currentFlushTimestamp = 0;
4275
4276  // Async edge case fix requires storing an event listener's attach timestamp.
4277  var getNow = Date.now;
4278
4279  // Determine what event timestamp the browser is using. Annoyingly, the
4280  // timestamp can either be hi-res (relative to page load) or low-res
4281  // (relative to UNIX epoch), so in order to compare time we have to use the
4282  // same timestamp type when saving the flush timestamp.
4283  // All IE versions use low-res event timestamps, and have problematic clock
4284  // implementations (#9632)
4285  if (inBrowser && !isIE) {
4286    var performance = window.performance;
4287    if (
4288      performance &&
4289      typeof performance.now === 'function' &&
4290      getNow() > document.createEvent('Event').timeStamp
4291    ) {
4292      // if the event timestamp, although evaluated AFTER the Date.now(), is
4293      // smaller than it, it means the event is using a hi-res timestamp,
4294      // and we need to use the hi-res version for event listener timestamps as
4295      // well.
4296      getNow = function () { return performance.now(); };
4297    }
4298  }
4299
4300  /**
4301   * Flush both queues and run the watchers.
4302   */
4303  function flushSchedulerQueue () {
4304    currentFlushTimestamp = getNow();
4305    flushing = true;
4306    var watcher, id;
4307
4308    // Sort queue before flush.
4309    // This ensures that:
4310    // 1. Components are updated from parent to child. (because parent is always
4311    //    created before the child)
4312    // 2. A component's user watchers are run before its render watcher (because
4313    //    user watchers are created before the render watcher)
4314    // 3. If a component is destroyed during a parent component's watcher run,
4315    //    its watchers can be skipped.
4316    queue.sort(function (a, b) { return a.id - b.id; });
4317
4318    // do not cache length because more watchers might be pushed
4319    // as we run existing watchers
4320    for (index = 0; index < queue.length; index++) {
4321      watcher = queue[index];
4322      if (watcher.before) {
4323        watcher.before();
4324      }
4325      id = watcher.id;
4326      has[id] = null;
4327      watcher.run();
4328      // in dev build, check and stop circular updates.
4329      if (has[id] != null) {
4330        circular[id] = (circular[id] || 0) + 1;
4331        if (circular[id] > MAX_UPDATE_COUNT) {
4332          warn(
4333            'You may have an infinite update loop ' + (
4334              watcher.user
4335                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
4336                : "in a component render function."
4337            ),
4338            watcher.vm
4339          );
4340          break
4341        }
4342      }
4343    }
4344
4345    // keep copies of post queues before resetting state
4346    var activatedQueue = activatedChildren.slice();
4347    var updatedQueue = queue.slice();
4348
4349    resetSchedulerState();
4350
4351    // call component updated and activated hooks
4352    callActivatedHooks(activatedQueue);
4353    callUpdatedHooks(updatedQueue);
4354
4355    // devtool hook
4356    /* istanbul ignore if */
4357    if (devtools && config.devtools) {
4358      devtools.emit('flush');
4359    }
4360  }
4361
4362  function callUpdatedHooks (queue) {
4363    var i = queue.length;
4364    while (i--) {
4365      var watcher = queue[i];
4366      var vm = watcher.vm;
4367      if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
4368        callHook(vm, 'updated');
4369      }
4370    }
4371  }
4372
4373  /**
4374   * Queue a kept-alive component that was activated during patch.
4375   * The queue will be processed after the entire tree has been patched.
4376   */
4377  function queueActivatedComponent (vm) {
4378    // setting _inactive to false here so that a render function can
4379    // rely on checking whether it's in an inactive tree (e.g. router-view)
4380    vm._inactive = false;

4381    activatedChildren.push(vm);
4382  }
4383
4384  function callActivatedHooks (queue) {
4385    for (var i = 0; i < queue.length; i++) {
4386      queue[i]._inactive = true;
4387      activateChildComponent(queue[i], true /* true */);
4388    }
4389  }
4390
4391  /**
4392   * Push a watcher into the watcher queue.
4393   * Jobs with duplicate IDs will be skipped unless it's
4394   * pushed when the queue is being flushed.
4395   */
4396  function queueWatcher (watcher) {
4397    var id = watcher.id;
4398    if (has[id] == null) {
4399      has[id] = true;
4400      if (!flushing) {
4401        queue.push(watcher);
4402      } else {
4403        // if already flushing, splice the watcher based on its id
4404        // if already past its id, it will be run next immediately.
4405        var i = queue.length - 1;
4406        while (i > index && queue[i].id > watcher.id) {
4407          i--;
4408        }
4409        queue.splice(i + 1, 0, watcher);
4410      }
4411      // queue the flush
4412      if (!waiting) {
4413        waiting = true;
4414
4415        if (!config.async) {
4416          flushSchedulerQueue();
4417          return
4418        }
4419        nextTick(flushSchedulerQueue);
4420      }
4421    }
4422  }
4423
4424  /*  */
4425
4426
4427
4428  var uid$2 = 0;
4429
4430  /**
4431   * A watcher parses an expression, collects dependencies,
4432   * and fires callback when the expression value changes.
4433   * This is used for both the $watch() api and directives.
4434   */
4435  var Watcher = function Watcher (
4436    vm,
4437    expOrFn,
4438    cb,
4439    options,
4440    isRenderWatcher
4441  ) {
4442    this.vm = vm;
4443    if (isRenderWatcher) {
4444      vm._watcher = this;
4445    }
4446    vm._watchers.push(this);
4447    // options
4448    if (options) {
4449      this.deep = !!options.deep;
4450      this.user = !!options.user;
4451      this.lazy = !!options.lazy;
4452      this.sync = !!options.sync;
4453      this.before = options.before;
4454    } else {
4455      this.deep = this.user = this.lazy = this.sync = false;
4456    }
4457    this.cb = cb;
4458    this.id = ++uid$2; // uid for batching
4459    this.active = true;
4460    this.dirty = this.lazy; // for lazy watchers
4461    this.deps = [];
4462    this.newDeps = [];
4463    this.depIds = new _Set();
4464    this.newDepIds = new _Set();
4465    this.expression = expOrFn.toString();
4466    // parse expression for getter
4467    if (typeof expOrFn === 'function') {
4468      this.getter = expOrFn;
4469    } else {
4470      this.getter = parsePath(expOrFn);
4471      if (!this.getter) {
4472        this.getter = noop;
4473        warn(
4474          "Failed watching path: \"" + expOrFn + "\" " +
4475          'Watcher only accepts simple dot-delimited paths. ' +
4476          'For full control, use a function instead.',
4477          vm
4478        );
4479      }
4480    }
4481    this.value = this.lazy
4482      ? undefined
4483      : this.get();
4484  };
4485
4486  /**
4487   * Evaluate the getter, and re-collect dependencies.
4488   */
4489  Watcher.prototype.get = function get () {
4490    pushTarget(this);
4491    var value;
4492    var vm = this.vm;
4493    try {
4494      value = this.getter.call(vm, vm);
4495    } catch (e) {
4496      if (this.user) {
4497        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
4498      } else {
4499        throw e
4500      }
4501    } finally {
4502      // "touch" every property so they are all tracked as
4503      // dependencies for deep watching
4504      if (this.deep) {
4505        traverse(value);
4506      }
4507      popTarget();
4508      this.cleanupDeps();
4509    }
4510    return value
4511  };
4512
4513  /**
4514   * Add a dependency to this directive.
4515   */
4516  Watcher.prototype.addDep = function addDep (dep) {
4517    var id = dep.id;
4518    if (!this.newDepIds.has(id)) {
4519      this.newDepIds.add(id);
4520      this.newDeps.push(dep);
4521      if (!this.depIds.has(id)) {
4522        dep.addSub(this);
4523      }
4524    }
4525  };
4526
4527  /**
4528   * Clean up for dependency collection.
4529   */
4530  Watcher.prototype.cleanupDeps = function cleanupDeps () {
4531    var i = this.deps.length;
4532    while (i--) {
4533      var dep = this.deps[i];
4534      if (!this.newDepIds.has(dep.id)) {
4535        dep.removeSub(this);
4536      }
4537    }
4538    var tmp = this.depIds;
4539    this.depIds = this.newDepIds;
4540    this.newDepIds = tmp;
4541    this.newDepIds.clear();
4542    tmp = this.deps;
4543    this.deps = this.newDeps;
4544    this.newDeps = tmp;
4545    this.newDeps.length = 0;
4546  };
4547
4548  /**
4549   * Subscriber interface.
4550   * Will be called when a dependency changes.
4551   */
4552  Watcher.prototype.update = function update () {
4553    /* istanbul ignore else */
4554    if (this.lazy) {
4555      this.dirty = true;
4556    } else if (this.sync) {
4557      this.run();
4558    } else {
4559      queueWatcher(this);
4560    }
4561  };
4562
4563  /**
4564   * Scheduler job interface.
4565   * Will be called by the scheduler.
4566   */
4567  Watcher.prototype.run = function run () {
4568    if (this.active) {
4569      var value = this.get();
4570      if (
4571        value !== this.value ||

4572        // Deep watchers and watchers on Object/Arrays should fire even
4573        // when the value is the same, because the value may
4574        // have mutated.
4575        isObject(value) ||
4576        this.deep
4577      ) {
4578        // set new value
4579        var oldValue = this.value;
4580        this.value = value;
4581        if (this.user) {
4582          var info = "callback for watcher \"" + (this.expression) + "\"";
4583          invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
4584        } else {
4585          this.cb.call(this.vm, value, oldValue);
4586        }
4587      }
4588    }
4589  };
4590
4591  /**
4592   * Evaluate the value of the watcher.
4593   * This only gets called for lazy watchers.
4594   */
4595  Watcher.prototype.evaluate = function evaluate () {
4596    this.value = this.get();
4597    this.dirty = false;
4598  };
4599
4600  /**
4601   * Depend on all deps collected by this watcher.
4602   */
4603  Watcher.prototype.depend = function depend () {
4604    var i = this.deps.length;
4605    while (i--) {
4606      this.deps[i].depend();
4607    }
4608  };
4609
4610  /**
4611   * Remove self from all dependencies' subscriber list.
4612   */
4613  Watcher.prototype.teardown = function teardown () {
4614    if (this.active) {
4615      // remove self from vm's watcher list
4616      // this is a somewhat expensive operation so we skip it
4617      // if the vm is being destroyed.
4618      if (!this.vm._isBeingDestroyed) {
4619        remove(this.vm._watchers, this);
4620      }
4621      var i = this.deps.length;
4622      while (i--) {
4623        this.deps[i].removeSub(this);
4624      }
4625      this.active = false;
4626    }
4627  };
4628
4629  /*  */
4630
4631  var sharedPropertyDefinition = {
4632    enumerable: true,
4633    configurable: true,
4634    get: noop,
4635    set: noop
4636  };
4637
4638  function proxy (target, sourceKey, key) {
4639    sharedPropertyDefinition.get = function proxyGetter () {
4640      return this[sourceKey][key]
4641    };
4642    sharedPropertyDefinition.set = function proxySetter (val) {
4643      this[sourceKey][key] = val;
4644    };
4645    Object.defineProperty(target, key, sharedPropertyDefinition);
4646  }
4647
4648  function initState (vm) {
4649    vm._watchers = [];
4650    var opts = vm.$options;
4651    if (opts.props) { initProps(vm, opts.props); }
4652    if (opts.methods) { initMethods(vm, opts.methods); }
4653    if (opts.data) {
4654      initData(vm);
4655    } else {
4656      observe(vm._data = {}, true /* asRootData */);
4657    }
4658    if (opts.computed) { initComputed(vm, opts.computed); }
4659    if (opts.watch && opts.watch !== nativeWatch) {
4660      initWatch(vm, opts.watch);
4661    }
4662  }
4663
4664  function initProps (vm, propsOptions) {
4665    var propsData = vm.$options.propsData || {};
4666    var props = vm._props = {};
4667    // cache prop keys so that future props updates can iterate using Array
4668    // instead of dynamic object key enumeration.
4669    var keys = vm.$options._propKeys = [];
4670    var isRoot = !vm.$parent;
4671    // root instance props should be converted
4672    if (!isRoot) {
4673      toggleObserving(false);
4674    }
4675    var loop = function ( key ) {
4676      keys.push(key);
4677      var value = validateProp(key, propsOptions, propsData, vm);
4678      /* istanbul ignore else */
4679      {
4680        var hyphenatedKey = hyphenate(key);
4681        if (isReservedAttribute(hyphenatedKey) ||
4682            config.isReservedAttr(hyphenatedKey)) {
4683          warn(
4684            ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
4685            vm
4686          );
4687        }
4688        defineReactive$$1(props, key, value, function () {
4689          if (!isRoot && !isUpdatingChildComponent) {
4690            warn(
4691              "Avoid mutating a prop directly since the value will be " +
4692              "overwritten whenever the parent component re-renders. " +
4693              "Instead, use a data or computed property based on the prop's " +
4694              "value. Prop being mutated: \"" + key + "\"",
4695              vm
4696            );
4697          }
4698        });
4699      }
4700      // static props are already proxied on the component's prototype
4701      // during Vue.extend(). We only need to proxy props defined at
4702      // instantiation here.
4703      if (!(key in vm)) {
4704        proxy(vm, "_props", key);
4705      }
4706    };
4707
4708    for (var key in propsOptions) loop( key );
4709    toggleObserving(true);
4710  }
4711
4712  function initData (vm) {
4713    var data = vm.$options.data;
4714    data = vm._data = typeof data === 'function'
4715      ? getData(data, vm)
4716      : data || {};
4717    if (!isPlainObject(data)) {
4718      data = {};
4719      warn(
4720        'data functions should return an object:\n' +
4721        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
4722        vm
4723      );
4724    }
4725    // proxy data on instance
4726    var keys = Object.keys(data);
4727    var props = vm.$options.props;
4728    var methods = vm.$options.methods;
4729    var i = keys.length;
4730    while (i--) {
4731      var key = keys[i];
4732      {
4733        if (methods && hasOwn(methods, key)) {
4734          warn(
4735            ("Method \"" + key + "\" has already been defined as a data property."),
4736            vm
4737          );
4738        }
4739      }
4740      if (props && hasOwn(props, key)) {
4741        warn(
4742          "The data property \"" + key + "\" is already declared as a prop. " +
4743          "Use prop default value instead.",
4744          vm
4745        );
4746      } else if (!isReserved(key)) {
4747        proxy(vm, "_data", key);
4748      }
4749    }
4750    // observe data
4751    observe(data, true /* asRootData */);
4752  }
4753
4754  function getData (data, vm) {
4755    // #7573 disable dep collection when invoking data getters
4756    pushTarget();
4757    try {
4758      return data.call(vm, vm)
4759    } catch (e) {
4760      handleError(e, vm, "data()");
4761      return {}
4762    } finally {
4763      popTarget();
4764    }
4765  }
4766
4767  var computedWatcherOptions = { lazy: true };
4768
4769  function initComputed (vm, computed) {
4770    // $flow-disable-line
4771    var watchers = vm._computedWatchers = Object.create(null);
4772    // computed properties are just getters during SSR
4773    var isSSR = isServerRendering();
4774
4775    for (var key in computed) {
4776      var userDef = computed[key];
4777      var getter = typeof userDef === 'function' ? userDef : userDef.get;
4778      if (getter == null) {
4779        warn(
4780          ("Getter is missing for computed property \"" + key + "\"."),
4781          vm
4782        );
4783      }
4784
4785      if (!isSSR) {
4786        // create internal watcher for the computed property.
4787        watchers[key] = new Watcher(
4788          vm,
4789          getter || noop,
4790          noop,
4791          computedWatcherOptions
4792        );
4793      }
4794
4795      // component-defined computed properties are already defined on the
4796      // component prototype. We only need to define computed properties defined
4797      // at instantiation here.
4798      if (!(key in vm)) {
4799        defineComputed(vm, key, userDef);
4800      } else {
4801        if (key in vm.$data) {
4802          warn(("The computed property \"" + key + "\" is already defined in data."), vm);
4803        } else if (vm.$options.props && key in vm.$options.props) {
4804          warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
4805        } else if (vm.$options.methods && key in vm.$options.methods) {
4806          warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
4807        }
4808      }
4809    }
4810  }
4811
4812  function defineComputed (
4813    target,
4814    key,
4815    userDef
4816  ) {
4817    var shouldCache = !isServerRendering();
4818    if (typeof userDef === 'function') {
4819      sharedPropertyDefinition.get = shouldCache
4820        ? createComputedGetter(key)
4821        : createGetterInvoker(userDef);
4822      sharedPropertyDefinition.set = noop;
4823    } else {
4824      sharedPropertyDefinition.get = userDef.get
4825        ? shouldCache && userDef.cache !== false
4826          ? createComputedGetter(key)
4827          : createGetterInvoker(userDef.get)
4828        : noop;
4829      sharedPropertyDefinition.set = userDef.set || noop;
4830    }
4831    if (sharedPropertyDefinition.set === noop) {
4832      sharedPropertyDefinition.set = function () {
4833        warn(
4834          ("Computed property \"" + key + "\" was assigned to but it has no setter."),
4835          this
4836        );
4837      };
4838    }
4839    Object.defineProperty(target, key, sharedPropertyDefinition);
4840  }
4841
4842  function createComputedGetter (key) {
4843    return function computedGetter () {
4844      var watcher = this._computedWatchers && this._computedWatchers[key];
4845      if (watcher) {
4846        if (watcher.dirty) {
4847          watcher.evaluate();
4848        }
4849        if (Dep.target) {

4850          watcher.depend();
4851        }
4852        return watcher.value
4853      }
4854    }
4855  }
4856
4857  function createGetterInvoker(fn) {
4858    return function computedGetter () {
4859      return fn.call(this, this)
4860    }
4861  }
4862
4863  function initMethods (vm, methods) {
4864    var props = vm.$options.props;
4865    for (var key in methods) {
4866      {
4867        if (typeof methods[key] !== 'function') {
4868          warn(
4869            "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
4870            "Did you reference the function correctly?",
4871            vm
4872          );
4873        }
4874        if (props && hasOwn(props, key)) {
4875          warn(
4876            ("Method \"" + key + "\" has already been defined as a prop."),
4877            vm
4878          );
4879        }
4880        if ((key in vm) && isReserved(key)) {
4881          warn(
4882            "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
4883            "Avoid defining component methods that start with _ or $."
4884          );
4885        }
4886      }
4887      vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
4888    }
4889  }
4890
4891  function initWatch (vm, watch) {
4892    for (var key in watch) {
4893      var handler = watch[key];
4894      if (Array.isArray(handler)) {
4895        for (var i = 0; i < handler.length; i++) {
4896          createWatcher(vm, key, handler[i]);
4897        }
4898      } else {
4899        createWatcher(vm, key, handler);
4900      }
4901    }
4902  }
4903
4904  function createWatcher (
4905    vm,
4906    expOrFn,
4907    handler,
4908    options
4909  ) {
4910    if (isPlainObject(handler)) {
4911      options = handler;
4912      handler = handler.handler;
4913    }
4914    if (typeof handler === 'string') {
4915      handler = vm[handler];
4916    }
4917    return vm.$watch(expOrFn, handler, options)
4918  }
4919
4920  function stateMixin (Vue) {
4921    // flow somehow has problems with directly declared definition object
4922    // when using Object.defineProperty, so we have to procedurally build up
4923    // the object here.
4924    var dataDef = {};
4925    dataDef.get = function () { return this._data };
4926    var propsDef = {};
4927    propsDef.get = function () { return this._props };
4928    {
4929      dataDef.set = function () {
4930        warn(
4931          'Avoid replacing instance root $data. ' +
4932          'Use nested data properties instead.',
4933          this
4934        );
4935      };
4936      propsDef.set = function () {
4937        warn("$props is readonly.", this);
4938      };
4939    }
4940    Object.defineProperty(Vue.prototype, '$data', dataDef);
4941    Object.defineProperty(Vue.prototype, '$props', propsDef);
4942
4943    Vue.prototype.$set = set;
4944    Vue.prototype.$delete = del;
4945
4946    Vue.prototype.$watch = function (
4947      expOrFn,
4948      cb,
4949      options
4950    ) {
4951      var vm = this;
4952      if (isPlainObject(cb)) {
4953        return createWatcher(vm, expOrFn, cb, options)
4954      }
4955      options = options || {};
4956      options.user = true;
4957      var watcher = new Watcher(vm, expOrFn, cb, options);
4958      if (options.immediate) {
4959        var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
4960        pushTarget();
4961        invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
4962        popTarget();
4963      }
4964      return function unwatchFn () {
4965        watcher.teardown();
4966      }
4967    };
4968  }
4969
4970  /*  */
4971
4972  var uid$3 = 0;
4973
4974  function initMixin (Vue) {
4975    Vue.prototype._init = function (options) {
4976      var vm = this;
4977      // a uid
4978      vm._uid = uid$3++;
4979
4980      var startTag, endTag;
4981      /* istanbul ignore if */
4982      if (config.performance && mark) {
4983        startTag = "vue-perf-start:" + (vm._uid);
4984        endTag = "vue-perf-end:" + (vm._uid);
4985        mark(startTag);
4986      }
4987
4988      // a flag to avoid this being observed
4989      vm._isVue = true;
4990      // merge options
4991      if (options && options._isComponent) {
4992        // optimize internal component instantiation
4993        // since dynamic options merging is pretty slow, and none of the
4994        // internal component options needs special treatment.
4995        initInternalComponent(vm, options);
4996      } else {
4997        vm.$options = mergeOptions(
4998          resolveConstructorOptions(vm.constructor),
4999          options || {},
5000          vm
5001        );
5002      }
5003      /* istanbul ignore else */
5004      {
5005        initProxy(vm);
5006      }
5007      // expose real self
5008      vm._self = vm;
5009      initLifecycle(vm);
5010      initEvents(vm);
5011      initRender(vm);
5012      callHook(vm, 'beforeCreate');
5013      initInjections(vm); // resolve injections before data/props
5014      initState(vm);
5015      initProvide(vm); // resolve provide after data/props
5016      callHook(vm, 'created');
5017
5018      /* istanbul ignore if */
5019      if (config.performance && mark) {
5020        vm._name = formatComponentName(vm, false);
5021        mark(endTag);
5022        measure(("vue " + (vm._name) + " init"), startTag, endTag);
5023      }
5024
5025      if (vm.$options.el) {
5026        vm.$mount(vm.$options.el);
5027      }
5028    };
5029  }
5030
5031  function initInternalComponent (vm, options) {
5032    var opts = vm.$options = Object.create(vm.constructor.options);
5033    // doing this because it's faster than dynamic enumeration.
5034    var parentVnode = options._parentVnode;
5035    opts.parent = options.parent;
5036    opts._parentVnode = parentVnode;
5037
5038    var vnodeComponentOptions = parentVnode.componentOptions;
5039    opts.propsData = vnodeComponentOptions.propsData;
5040    opts._parentListeners = vnodeComponentOptions.listeners;
5041    opts._renderChildren = vnodeComponentOptions.children;
5042    opts._componentTag = vnodeComponentOptions.tag;
5043
5044    if (options.render) {
5045      opts.render = options.render;
5046      opts.staticRenderFns = options.staticRenderFns;
5047    }
5048  }
5049

5050  function resolveConstructorOptions (Ctor) {
5051    var options = Ctor.options;
5052    if (Ctor.super) {
5053      var superOptions = resolveConstructorOptions(Ctor.super);
5054      var cachedSuperOptions = Ctor.superOptions;
5055      if (superOptions !== cachedSuperOptions) {
5056        // super option changed,
5057        // need to resolve new options.
5058        Ctor.superOptions = superOptions;
5059        // check if there are any late-modified/attached options (#4976)
5060        var modifiedOptions = resolveModifiedOptions(Ctor);
5061        // update base extend options
5062        if (modifiedOptions) {
5063          extend(Ctor.extendOptions, modifiedOptions);
5064        }
5065        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
5066        if (options.name) {
5067          options.components[options.name] = Ctor;
5068        }
5069      }
5070    }
5071    return options
5072  }
5073
5074  function resolveModifiedOptions (Ctor) {
5075    var modified;
5076    var latest = Ctor.options;
5077    var sealed = Ctor.sealedOptions;
5078    for (var key in latest) {
5079      if (latest[key] !== sealed[key]) {
5080        if (!modified) { modified = {}; }
5081        modified[key] = latest[key];
5082      }
5083    }
5084    return modified
5085  }
5086
5087  function Vue (options) {
5088    if (!(this instanceof Vue)
5089    ) {
5090      warn('Vue is a constructor and should be called with the `new` keyword');
5091    }
5092    this._init(options);
5093  }
5094
5095  initMixin(Vue);
5096  stateMixin(Vue);
5097  eventsMixin(Vue);
5098  lifecycleMixin(Vue);
5099  renderMixin(Vue);
5100
5101  /*  */
5102
5103  function initUse (Vue) {
5104    Vue.use = function (plugin) {
5105      var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
5106      if (installedPlugins.indexOf(plugin) > -1) {
5107        return this
5108      }
5109
5110      // additional parameters
5111      var args = toArray(arguments, 1);
5112      args.unshift(this);
5113      if (typeof plugin.install === 'function') {
5114        plugin.install.apply(plugin, args);
5115      } else if (typeof plugin === 'function') {
5116        plugin.apply(null, args);
5117      }
5118      installedPlugins.push(plugin);
5119      return this
5120    };
5121  }
5122
5123  /*  */
5124
5125  function initMixin$1 (Vue) {
5126    Vue.mixin = function (mixin) {
5127      this.options = mergeOptions(this.options, mixin);
5128      return this
5129    };
5130  }
5131
5132  /*  */
5133
5134  function initExtend (Vue) {
5135    /**
5136     * Each instance constructor, including Vue, has a unique
5137     * cid. This enables us to create wrapped "child
5138     * constructors" for prototypal inheritance and cache them.
5139     */
5140    Vue.cid = 0;
5141    var cid = 1;
5142
5143    /**
5144     * Class inheritance
5145     */
5146    Vue.extend = function (extendOptions) {
5147      extendOptions = extendOptions || {};
5148      var Super = this;
5149      var SuperId = Super.cid;
5150      var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
5151      if (cachedCtors[SuperId]) {
5152        return cachedCtors[SuperId]
5153      }
5154
5155      var name = extendOptions.name || Super.options.name;
5156      if (name) {
5157        validateComponentName(name);
5158      }
5159
5160      var Sub = function VueComponent (options) {
5161        this._init(options);
5162      };
5163      Sub.prototype = Object.create(Super.prototype);
5164      Sub.prototype.constructor = Sub;
5165      Sub.cid = cid++;
5166      Sub.options = mergeOptions(
5167        Super.options,
5168        extendOptions
5169      );
5170      Sub['super'] = Super;
5171
5172      // For props and computed properties, we define the proxy getters on
5173      // the Vue instances at extension time, on the extended prototype. This
5174      // avoids Object.defineProperty calls for each instance created.
5175      if (Sub.options.props) {
5176        initProps$1(Sub);
5177      }
5178      if (Sub.options.computed) {
5179        initComputed$1(Sub);
5180      }
5181
5182      // allow further extension/mixin/plugin usage
5183      Sub.extend = Super.extend;
5184      Sub.mixin = Super.mixin;
5185      Sub.use = Super.use;
5186
5187      // create asset registers, so extended classes
5188      // can have their private assets too.
5189      ASSET_TYPES.forEach(function (type) {
5190        Sub[type] = Super[type];
5191      });
5192      // enable recursive self-lookup
5193      if (name) {
5194        Sub.options.components[name] = Sub;
5195      }
5196
5197      // keep a reference to the super options at extension time.
5198      // later at instantiation we can check if Super's options have
5199      // been updated.
5200      Sub.superOptions = Super.options;
5201      Sub.extendOptions = extendOptions;
5202      Sub.sealedOptions = extend({}, Sub.options);
5203

5204      // cache constructor
5205      cachedCtors[SuperId] = Sub;
5206      return Sub
5207    };
5208  }
5209
5210  function initProps$1 (Comp) {
5211    var props = Comp.options.props;
5212    for (var key in props) {
5213      proxy(Comp.prototype, "_props", key);
5214    }
5215  }
5216
5217  function initComputed$1 (Comp) {
5218    var computed = Comp.options.computed;
5219    for (var key in computed) {
5220      defineComputed(Comp.prototype, key, computed[key]);
5221    }
5222  }
5223
5224  /*  */
5225
5226  function initAssetRegisters (Vue) {
5227    /**
5228     * Create asset registration methods.
5229     */
5230    ASSET_TYPES.forEach(function (type) {
5231      Vue[type] = function (
5232        id,
5233        definition
5234      ) {
5235        if (!definition) {
5236          return this.options[type + 's'][id]
5237        } else {
5238          /* istanbul ignore if */
5239          if (type === 'component') {
5240            validateComponentName(id);
5241          }
5242          if (type === 'component' && isPlainObject(definition)) {
5243            definition.name = definition.name || id;
5244            definition = this.options._base.extend(definition);
5245          }
5246          if (type === 'directive' && typeof definition === 'function') {
5247            definition = { bind: definition, update: definition };
5248          }
5249          this.options[type + 's'][id] = definition;
5250          return definition
5251        }
5252      };
5253    });
5254  }
5255
5256  /*  */
5257
5258
5259
5260
5261
5262  function getComponentName (opts) {
5263    return opts && (opts.Ctor.options.name || opts.tag)
5264  }
5265
5266  function matches (pattern, name) {
5267    if (Array.isArray(pattern)) {
5268      return pattern.indexOf(name) > -1
5269    } else if (typeof pattern === 'string') {
5270      return pattern.split(',').indexOf(name) > -1
5271    } else if (isRegExp(pattern)) {
5272      return pattern.test(name)
5273    }
5274    /* istanbul ignore next */
5275    return false
5276  }
5277
5278  function pruneCache (keepAliveInstance, filter) {
5279    var cache = keepAliveInstance.cache;
5280    var keys = keepAliveInstance.keys;
5281    var _vnode = keepAliveInstance._vnode;
5282    for (var key in cache) {
5283      var entry = cache[key];
5284      if (entry) {
5285        var name = entry.name;
5286        if (name && !filter(name)) {
5287          pruneCacheEntry(cache, key, keys, _vnode);
5288        }
5289      }
5290    }
5291  }
5292
5293  function pruneCacheEntry (
5294    cache,
5295    key,
5296    keys,
5297    current
5298  ) {
5299    var entry = cache[key];
5300    if (entry && (!current || entry.tag !== current.tag)) {
5301      entry.componentInstance.$destroy();
5302    }
5303    cache[key] = null;
5304    remove(keys, key);
5305  }
5306
5307  var patternTypes = [String, RegExp, Array];
5308
5309  var KeepAlive = {
5310    name: 'keep-alive',
5311    abstract: true,
5312
5313    props: {
5314      include: patternTypes,
5315      exclude: patternTypes,
5316      max: [String, Number]
5317    },
5318
5319    methods: {
5320      cacheVNode: function cacheVNode() {
5321        var ref = this;
5322        var cache = ref.cache;
5323        var keys = ref.keys;
5324        var vnodeToCache = ref.vnodeToCache;
5325        var keyToCache = ref.keyToCache;
5326        if (vnodeToCache) {
5327          var tag = vnodeToCache.tag;
5328          var componentInstance = vnodeToCache.componentInstance;
5329          var componentOptions = vnodeToCache.componentOptions;
5330          cache[keyToCache] = {
5331            name: getComponentName(componentOptions),
5332            tag: tag,
5333            componentInstance: componentInstance,
5334          };
5335          keys.push(keyToCache);
5336          // prune oldest entry
5337          if (this.max && keys.length > parseInt(this.max)) {
5338            pruneCacheEntry(cache, keys[0], keys, this._vnode);
5339          }
5340          this.vnodeToCache = null;
5341        }
5342      }
5343    },
5344
5345    created: function created () {
5346      this.cache = Object.create(null);
5347      this.keys = [];
5348    },
5349
5350    destroyed: function destroyed () {
5351      for (var key in this.cache) {
5352        pruneCacheEntry(this.cache, key, this.keys);
5353      }
5354    },
5355
5356    mounted: function mounted () {
5357      var this$1 = this;
5358
5359      this.cacheVNode();
5360      this.$watch('include', function (val) {
5361        pruneCache(this$1, function (name) { return matches(val, name); });
5362      });
5363      this.$watch('exclude', function (val) {
5364        pruneCache(this$1, function (name) { return !matches(val, name); });
5365      });
5366    },
5367
5368    updated: function updated () {
5369      this.cacheVNode();
5370    },
5371
5372    render: function render () {
5373      var slot = this.$slots.default;
5374      var vnode = getFirstComponentChild(slot);
5375      var componentOptions = vnode && vnode.componentOptions;
5376      if (componentOptions) {
5377        // check pattern
5378        var name = getComponentName(componentOptions);
5379        var ref = this;
5380        var include = ref.include;
5381        var exclude = ref.exclude;
5382        if (
5383          // not included
5384          (include && (!name || !matches(include, name))) ||
5385          // excluded
5386          (exclude && name && matches(exclude, name))
5387        ) {
5388          return vnode
5389        }
5390
5391        var ref$1 = this;
5392        var cache = ref$1.cache;
5393        var keys = ref$1.keys;
5394        var key = vnode.key == null
5395          // same constructor may get registered as different local components
5396          // so cid alone is not enough (#3269)
5397          ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
5398          : vnode.key;
5399        if (cache[key]) {

5400          vnode.componentInstance = cache[key].componentInstance;
5401          // make current key freshest
5402          remove(keys, key);
5403          keys.push(key);
5404        } else {
5405          // delay setting the cache until update
5406          this.vnodeToCache = vnode;
5407          this.keyToCache = key;
5408        }
5409
5410        vnode.data.keepAlive = true;
5411      }
5412      return vnode || (slot && slot[0])
5413    }
5414  };
5415
5416  var builtInComponents = {
5417    KeepAlive: KeepAlive
5418  };
5419
5420  /*  */
5421
5422  function initGlobalAPI (Vue) {
5423    // config
5424    var configDef = {};
5425    configDef.get = function () { return config; };
5426    {
5427      configDef.set = function () {
5428        warn(
5429          'Do not replace the Vue.config object, set individual fields instead.'
5430        );
5431      };
5432    }
5433    Object.defineProperty(Vue, 'config', configDef);
5434
5435    // exposed util methods.
5436    // NOTE: these are not considered part of the public API - avoid relying on
5437    // them unless you are aware of the risk.
5438    Vue.util = {
5439      warn: warn,
5440      extend: extend,
5441      mergeOptions: mergeOptions,
5442      defineReactive: defineReactive$$1
5443    };
5444
5445    Vue.set = set;
5446    Vue.delete = del;
5447    Vue.nextTick = nextTick;
5448
5449    // 2.6 explicit observable API
5450    Vue.observable = function (obj) {
5451      observe(obj);
5452      return obj
5453    };
5454
5455    Vue.options = Object.create(null);
5456    ASSET_TYPES.forEach(function (type) {
5457      Vue.options[type + 's'] = Object.create(null);
5458    });
5459
5460    // this is used to identify the "base" constructor to extend all plain-object
5461    // components with in Weex's multi-instance scenarios.
5462    Vue.options._base = Vue;
5463
5464    extend(Vue.options.components, builtInComponents);
5465
5466    initUse(Vue);
5467    initMixin$1(Vue);
5468    initExtend(Vue);
5469    initAssetRegisters(Vue);
5470  }
5471
5472  initGlobalAPI(Vue);
5473
5474  Object.defineProperty(Vue.prototype, '$isServer', {
5475    get: isServerRendering
5476  });
5477
5478  Object.defineProperty(Vue.prototype, '$ssrContext', {
5479    get: function get () {
5480      /* istanbul ignore next */
5481      return this.$vnode && this.$vnode.ssrContext
5482    }
5483  });
5484
5485  // expose FunctionalRenderContext for ssr runtime helper installation
5486  Object.defineProperty(Vue, 'FunctionalRenderContext', {
5487    value: FunctionalRenderContext
5488  });
5489
5490  Vue.version = '2.6.14';
5491
5492  /*  */
5493
5494  // these are reserved for web because they are directly compiled away
5495  // during template compilation
5496  var isReservedAttr = makeMap('style,class');
5497
5498  // attributes that should be using props for binding
5499  var acceptValue = makeMap('input,textarea,option,select,progress');
5500  var mustUseProp = function (tag, type, attr) {
5501    return (
5502      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
5503      (attr === 'selected' && tag === 'option') ||
5504      (attr === 'checked' && tag === 'input') ||
5505      (attr === 'muted' && tag === 'video')
5506    )
5507  };
5508
5509  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
5510
5511  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
5512
5513  var convertEnumeratedValue = function (key, value) {
5514    return isFalsyAttrValue(value) || value === 'false'
5515      ? 'false'
5516      // allow arbitrary string value for contenteditable
5517      : key === 'contenteditable' && isValidContentEditableValue(value)
5518        ? value
5519        : 'true'
5520  };
5521
5522  var isBooleanAttr = makeMap(
5523    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
5524    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
5525    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
5526    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
5527    'required,reversed,scoped,seamless,selected,sortable,' +
5528    'truespeed,typemustmatch,visible'
5529  );
5530
5531  var xlinkNS = 'http://www.w3.org/1999/xlink';
5532
5533  var isXlink = function (name) {
5534    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
5535  };
5536
5537  var getXlinkProp = function (name) {
5538    return isXlink(name) ? name.slice(6, name.length) : ''
5539  };
5540
5541  var isFalsyAttrValue = function (val) {
5542    return val == null || val === false
5543  };
5544
5545  /*  */
5546
5547  function genClassForVnode (vnode) {
5548    var data = vnode.data;
5549    var parentNode = vnode;
5550    var childNode = vnode;
5551    while (isDef(childNode.componentInstance)) {
5552      childNode = childNode.componentInstance._vnode;
5553      if (childNode && childNode.data) {
5554        data = mergeClassData(childNode.data, data);
5555      }
5556    }
5557    while (isDef(parentNode = parentNode.parent)) {
5558      if (parentNode && parentNode.data) {
5559        data = mergeClassData(data, parentNode.data);
5560      }
5561    }
5562    return renderClass(data.staticClass, data.class)
5563  }
5564
5565  function mergeClassData (child, parent) {
5566    return {
5567      staticClass: concat(child.staticClass, parent.staticClass),
5568      class: isDef(child.class)
5569        ? [child.class, parent.class]
5570        : parent.class
5571    }
5572  }
5573
5574  function renderClass (
5575    staticClass,
5576    dynamicClass
5577  ) {
5578    if (isDef(staticClass) || isDef(dynamicClass)) {
5579      return concat(staticClass, stringifyClass(dynamicClass))
5580    }
5581    /* istanbul ignore next */
5582    return ''
5583  }
5584
5585  function concat (a, b) {
5586    return a ? b ? (a + ' ' + b) : a : (b || '')
5587  }
5588
5589  function stringifyClass (value) {
5590    if (Array.isArray(value)) {
5591      return stringifyArray(value)
5592    }
5593    if (isObject(value)) {
5594      return stringifyObject(value)
5595    }
5596    if (typeof value === 'string') {
5597      return value
5598    }
5599    /* istanbul ignore next */
5600    return ''
5601  }
5602
5603  function stringifyArray (value) {
5604    var res = '';
5605    var stringified;
5606    for (var i = 0, l = value.length; i < l; i++) {
5607      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
5608        if (res) { res += ' '; }
5609        res += stringified;
5610      }
5611    }
5612    return res
5613  }
5614
5615  function stringifyObject (value) {
5616    var res = '';
5617    for (var key in value) {
5618      if (value[key]) {
5619        if (res) { res += ' '; }
5620        res += key;
5621      }
5622    }
5623    return res
5624  }
5625
5626  /*  */
5627
5628  var namespaceMap = {
5629    svg: 'http://www.w3.org/2000/svg',
5630    math: 'http://www.w3.org/1998/Math/MathML'
5631  };
5632
5633  var isHTMLTag = makeMap(
5634    'html,body,base,head,link,meta,style,title,' +
5635    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
5636    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
5637    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
5638    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
5639    'embed,object,param,source,canvas,script,noscript,del,ins,' +
5640    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
5641    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
5642    'output,progress,select,textarea,' +
5643    'details,dialog,menu,menuitem,summary,' +
5644    'content,element,shadow,template,blockquote,iframe,tfoot'
5645  );
5646
5647  // this map is intentionally selective, only covering SVG elements that may
5648  // contain child elements.
5649  var isSVG = makeMap(
5650    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
5651    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
5652    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
5653    true
5654  );
5655
5656  var isPreTag = function (tag) { return tag === 'pre'; };
5657
5658  var isReservedTag = function (tag) {
5659    return isHTMLTag(tag) || isSVG(tag)
5660  };
5661
5662  function getTagNamespace (tag) {
5663    if (isSVG(tag)) {
5664      return 'svg'
5665    }
5666    // basic support for MathML
5667    // note it doesn't support other MathML elements being component roots
5668    if (tag === 'math') {
5669      return 'math'
5670    }
5671  }
5672
5673  var unknownElementCache = Object.create(null);
5674  function isUnknownElement (tag) {
5675    /* istanbul ignore if */
5676    if (!inBrowser) {
5677      return true
5678    }
5679    if (isReservedTag(tag)) {
5680      return false
5681    }
5682    tag = tag.toLowerCase();
5683    /* istanbul ignore if */
5684    if (unknownElementCache[tag] != null) {
5685      return unknownElementCache[tag]
5686    }
5687    var el = document.createElement(tag);
5688    if (tag.indexOf('-') > -1) {
5689      // http://stackoverflow.com/a/28210364/1070244
5690      return (unknownElementCache[tag] = (
5691        el.constructor === window.HTMLUnknownElement ||
5692        el.constructor === window.HTMLElement
5693      ))
5694    } else {
5695      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
5696    }
5697  }
5698
5699  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
5700
5701  /*  */
5702
5703  /**
5704   * Query an element selector if it's not an element already.
5705   */
5706  function query (el) {
5707    if (typeof el === 'string') {
5708      var selected = document.querySelector(el);
5709      if (!selected) {
5710        warn(
5711          'Cannot find element: ' + el
5712        );
5713        return document.createElement('div')
5714      }
5715      return selected
5716    } else {
5717      return el
5718    }
5719  }
5720
5721  /*  */
5722
5723  function createElement$1 (tagName, vnode) {
5724    var elm = document.createElement(tagName);
5725    if (tagName !== 'select') {
5726      return elm
5727    }
5728    // false or null will remove the attribute but undefined will not
5729    if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
5730      elm.setAttribute('multiple', 'multiple');
5731    }
5732    return elm
5733  }
5734
5735  function createElementNS (namespace, tagName) {
5736    return document.createElementNS(namespaceMap[namespace], tagName)
5737  }
5738
5739  function createTextNode (text) {
5740    return document.createTextNode(text)
5741  }
5742
5743  function createComment (text) {
5744    return document.createComment(text)
5745  }
5746
5747  function insertBefore (parentNode, newNode, referenceNode) {
5748    parentNode.insertBefore(newNode, referenceNode);
5749  }
5750
5751  function removeChild (node, child) {
5752    node.removeChild(child);
5753  }
5754
5755  function appendChild (node, child) {
5756    node.appendChild(child);
5757  }
5758
5759  function parentNode (node) {
5760    return node.parentNode
5761  }
5762
5763  function nextSibling (node) {
5764    return node.nextSibling
5765  }
5766
5767  function tagName (node) {
5768    return node.tagName
5769  }
5770
5771  function setTextContent (node, text) {
5772    node.textContent = text;
5773  }
5774
5775  function setStyleScope (node, scopeId) {
5776    node.setAttribute(scopeId, '');
5777  }
5778
5779  var nodeOps = /*#__PURE__*/Object.freeze({
5780    createElement: createElement$1,
5781    createElementNS: createElementNS,
5782    createTextNode: createTextNode,
5783    createComment: createComment,
5784    insertBefore: insertBefore,
5785    removeChild: removeChild,
5786    appendChild: appendChild,
5787    parentNode: parentNode,
5788    nextSibling: nextSibling,
5789    tagName: tagName,
5790    setTextContent: setTextContent,
5791    setStyleScope: setStyleScope
5792  });
5793
5794  /*  */
5795
5796  var ref = {
5797    create: function create (_, vnode) {
5798      registerRef(vnode);
5799    },
5800    update: function update (oldVnode, vnode) {
5801      if (oldVnode.data.ref !== vnode.data.ref) {
5802        registerRef(oldVnode, true);
5803        registerRef(vnode);
5804      }
5805    },
5806    destroy: function destroy (vnode) {
5807      registerRef(vnode, true);
5808    }
5809  };
5810
5811  function registerRef (vnode, isRemoval) {
5812    var key = vnode.data.ref;
5813    if (!isDef(key)) { return }
5814
5815    var vm = vnode.context;
5816    var ref = vnode.componentInstance || vnode.elm;
5817    var refs = vm.$refs;
5818    if (isRemoval) {
5819      if (Array.isArray(refs[key])) {
5820        remove(refs[key], ref);
5821      } else if (refs[key] === ref) {
5822        refs[key] = undefined;
5823      }
5824    } else {
5825      if (vnode.data.refInFor) {
5826        if (!Array.isArray(refs[key])) {
5827          refs[key] = [ref];
5828        } else if (refs[key].indexOf(ref) < 0) {
5829          // $flow-disable-line
5830          refs[key].push(ref);
5831        }
5832      } else {
5833        refs[key] = ref;
5834      }
5835    }
5836  }
5837
5838  /**
5839   * Virtual DOM patching algorithm based on Snabbdom by
5840   * Simon Friis Vindum (@paldepind)
5841   * Licensed under the MIT License
5842   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
5843   *
5844   * modified by Evan You (@yyx990803)
5845   *
5846   * Not type-checking this because this file is perf-critical and the cost
5847   * of making flow understand it is not worth it.
5848   */
5849
5850  var emptyNode = new VNode('', {}, []);
5851
5852  var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
5853
5854  function sameVnode (a, b) {
5855    return (

5856      a.key === b.key &&
5857      a.asyncFactory === b.asyncFactory && (
5858        (
5859          a.tag === b.tag &&
5860          a.isComment === b.isComment &&
5861          isDef(a.data) === isDef(b.data) &&
5862          sameInputType(a, b)
5863        ) || (
5864          isTrue(a.isAsyncPlaceholder) &&
5865          isUndef(b.asyncFactory.error)
5866        )
5867      )
5868    )
5869  }
5870
5871  function sameInputType (a, b) {
5872    if (a.tag !== 'input') { return true }
5873    var i;
5874    var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
5875    var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
5876    return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
5877  }
5878
5879  function createKeyToOldIdx (children, beginIdx, endIdx) {
5880    var i, key;
5881    var map = {};
5882    for (i = beginIdx; i <= endIdx; ++i) {
5883      key = children[i].key;
5884      if (isDef(key)) { map[key] = i; }
5885    }
5886    return map
5887  }
5888
5889  function createPatchFunction (backend) {
5890    var i, j;
5891    var cbs = {};
5892
5893    var modules = backend.modules;
5894    var nodeOps = backend.nodeOps;
5895
5896    for (i = 0; i < hooks.length; ++i) {
5897      cbs[hooks[i]] = [];
5898      for (j = 0; j < modules.length; ++j) {
5899        if (isDef(modules[j][hooks[i]])) {
5900          cbs[hooks[i]].push(modules[j][hooks[i]]);
5901        }
5902      }
5903    }
5904
5905    function emptyNodeAt (elm) {
5906      return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
5907    }
5908
5909    function createRmCb (childElm, listeners) {
5910      function remove$$1 () {
5911        if (--remove$$1.listeners === 0) {
5912          removeNode(childElm);
5913        }
5914      }
5915      remove$$1.listeners = listeners;
5916      return remove$$1
5917    }
5918
5919    function removeNode (el) {
5920      var parent = nodeOps.parentNode(el);
5921      // element may have already been removed due to v-html / v-text
5922      if (isDef(parent)) {
5923        nodeOps.removeChild(parent, el);
5924      }
5925    }
5926
5927    function isUnknownElement$$1 (vnode, inVPre) {
5928      return (
5929        !inVPre &&
5930        !vnode.ns &&
5931        !(
5932          config.ignoredElements.length &&
5933          config.ignoredElements.some(function (ignore) {
5934            return isRegExp(ignore)
5935              ? ignore.test(vnode.tag)
5936              : ignore === vnode.tag
5937          })
5938        ) &&
5939        config.isUnknownElement(vnode.tag)
5940      )
5941    }
5942
5943    var creatingElmInVPre = 0;
5944
5945    function createElm (
5946      vnode,
5947      insertedVnodeQueue,
5948      parentElm,
5949      refElm,
5950      nested,
5951      ownerArray,
5952      index
5953    ) {

5954      if (isDef(vnode.elm) && isDef(ownerArray)) {
5955        // This vnode was used in a previous render!
5956        // now it's used as a new node, overwriting its elm would cause
5957        // potential patch errors down the road when it's used as an insertion
5958        // reference node. Instead, we clone the node on-demand before creating
5959        // associated DOM element for it.
5960        vnode = ownerArray[index] = cloneVNode(vnode);
5961      }
5962
5963      vnode.isRootInsert = !nested; // for transition enter check
5964      if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
5965        return
5966      }
5967
5968      var data = vnode.data;
5969      var children = vnode.children;
5970      var tag = vnode.tag;
5971      if (isDef(tag)) {
5972        {
5973          if (data && data.pre) {
5974            creatingElmInVPre++;
5975          }
5976          if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
5977            warn(
5978              'Unknown custom element: <' + tag + '> - did you ' +
5979              'register the component correctly? For recursive components, ' +
5980              'make sure to provide the "name" option.',
5981              vnode.context
5982            );
5983          }
5984        }
5985
5986        vnode.elm = vnode.ns
5987          ? nodeOps.createElementNS(vnode.ns, tag)
5988          : nodeOps.createElement(tag, vnode);
5989        setScope(vnode);
5990
5991        /* istanbul ignore if */
5992        {
5993          createChildren(vnode, children, insertedVnodeQueue);
5994          if (isDef(data)) {
5995            invokeCreateHooks(vnode, insertedVnodeQueue);
5996          }
5997          insert(parentElm, vnode.elm, refElm);
5998        }
5999
6000        if (data && data.pre) {
6001          creatingElmInVPre--;
6002        }
6003      } else if (isTrue(vnode.isComment)) {
6004        vnode.elm = nodeOps.createComment(vnode.text);
6005        insert(parentElm, vnode.elm, refElm);
6006      } else {
6007        vnode.elm = nodeOps.createTextNode(vnode.text);
6008        insert(parentElm, vnode.elm, refElm);
6009      }
6010    }
6011
6012    function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
6013      var i = vnode.data;
6014      if (isDef(i)) {
6015        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
6016        if (isDef(i = i.hook) && isDef(i = i.init)) {
6017          i(vnode, false /* hydrating */);
6018        }
6019        // after calling the init hook, if the vnode is a child component
6020        // it should've created a child instance and mounted it. the child
6021        // component also has set the placeholder vnode's elm.
6022        // in that case we can just return the element and be done.

6023        if (isDef(vnode.componentInstance)) {
6024          initComponent(vnode, insertedVnodeQueue);
6025          insert(parentElm, vnode.elm, refElm);
6026          if (isTrue(isReactivated)) {
6027            reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
6028          }
6029          return true
6030        }
6031      }
6032    }
6033
6034    function initComponent (vnode, insertedVnodeQueue) {
6035      if (isDef(vnode.data.pendingInsert)) {
6036        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
6037        vnode.data.pendingInsert = null;
6038      }
6039      vnode.elm = vnode.componentInstance.$el;
6040      if (isPatchable(vnode)) {
6041        invokeCreateHooks(vnode, insertedVnodeQueue);
6042        setScope(vnode);
6043      } else {
6044        // empty component root.
6045        // skip all element-related modules except for ref (#3455)
6046        registerRef(vnode);
6047        // make sure to invoke the insert hook
6048        insertedVnodeQueue.push(vnode);
6049      }
6050    }
6051
6052    function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
6053      var i;
6054      // hack for #4339: a reactivated component with inner transition
6055      // does not trigger because the inner node's created hooks are not called
6056      // again. It's not ideal to involve module-specific logic in here but
6057      // there doesn't seem to be a better way to do it.
6058      var innerNode = vnode;
6059      while (innerNode.componentInstance) {
6060        innerNode = innerNode.componentInstance._vnode;
6061        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
6062          for (i = 0; i < cbs.activate.length; ++i) {
6063            cbs.activate[i](emptyNode, innerNode);
6064          }
6065          insertedVnodeQueue.push(innerNode);
6066          break
6067        }
6068      }
6069      // unlike a newly created component,
6070      // a reactivated keep-alive component doesn't insert itself
6071      insert(parentElm, vnode.elm, refElm);
6072    }
6073
6074    function insert (parent, elm, ref$$1) {
6075      if (isDef(parent)) {
6076        if (isDef(ref$$1)) {
6077          if (nodeOps.parentNode(ref$$1) === parent) {
6078            nodeOps.insertBefore(parent, elm, ref$$1);
6079          }
6080        } else {
6081          nodeOps.appendChild(parent, elm);
6082        }
6083      }
6084    }
6085
6086    function createChildren (vnode, children, insertedVnodeQueue) {
6087      if (Array.isArray(children)) {
6088        {
6089          checkDuplicateKeys(children);
6090        }
6091        for (var i = 0; i < children.length; ++i) {
6092          createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
6093        }
6094      } else if (isPrimitive(vnode.text)) {
6095        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
6096      }
6097    }
6098
6099    function isPatchable (vnode) {
6100      while (vnode.componentInstance) {
6101        vnode = vnode.componentInstance._vnode;
6102      }
6103      return isDef(vnode.tag)
6104    }
6105
6106    function invokeCreateHooks (vnode, insertedVnodeQueue) {
6107      for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
6108        cbs.create[i$1](emptyNode, vnode);
6109      }
6110      i = vnode.data.hook; // Reuse variable
6111      if (isDef(i)) {
6112        if (isDef(i.create)) { i.create(emptyNode, vnode); }
6113        if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
6114      }
6115    }
6116
6117    // set scope id attribute for scoped CSS.
6118    // this is implemented as a special case to avoid the overhead
6119    // of going through the normal attribute patching process.
6120    function setScope (vnode) {
6121      var i;
6122      if (isDef(i = vnode.fnScopeId)) {
6123        nodeOps.setStyleScope(vnode.elm, i);
6124      } else {
6125        var ancestor = vnode;
6126        while (ancestor) {
6127          if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
6128            nodeOps.setStyleScope(vnode.elm, i);
6129          }
6130          ancestor = ancestor.parent;
6131        }
6132      }
6133      // for slot content they should also get the scopeId from the host instance.
6134      if (isDef(i = activeInstance) &&
6135        i !== vnode.context &&
6136        i !== vnode.fnContext &&
6137        isDef(i = i.$options._scopeId)
6138      ) {
6139        nodeOps.setStyleScope(vnode.elm, i);
6140      }
6141    }
6142
6143    function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
6144      for (; startIdx <= endIdx; ++startIdx) {
6145        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
6146      }
6147    }
6148
6149    function invokeDestroyHook (vnode) {
6150      var i, j;
6151      var data = vnode.data;
6152      if (isDef(data)) {
6153        if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
6154        for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
6155      }
6156      if (isDef(i = vnode.children)) {
6157        for (j = 0; j < vnode.children.length; ++j) {
6158          invokeDestroyHook(vnode.children[j]);
6159        }
6160      }
6161    }
6162
6163    function removeVnodes (vnodes, startIdx, endIdx) {
6164      for (; startIdx <= endIdx; ++startIdx) {
6165        var ch = vnodes[startIdx];
6166        if (isDef(ch)) {
6167          if (isDef(ch.tag)) {
6168            removeAndInvokeRemoveHook(ch);
6169            invokeDestroyHook(ch);
6170          } else { // Text node
6171            removeNode(ch.elm);
6172          }
6173        }
6174      }
6175    }
6176
6177    function removeAndInvokeRemoveHook (vnode, rm) {
6178      if (isDef(rm) || isDef(vnode.data)) {
6179        var i;
6180        var listeners = cbs.remove.length + 1;
6181        if (isDef(rm)) {
6182          // we have a recursively passed down rm callback
6183          // increase the listeners count
6184          rm.listeners += listeners;
6185        } else {
6186          // directly removing
6187          rm = createRmCb(vnode.elm, listeners);
6188        }
6189        // recursively invoke hooks on child component root node
6190        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
6191          removeAndInvokeRemoveHook(i, rm);
6192        }
6193        for (i = 0; i < cbs.remove.length; ++i) {

6194          cbs.remove[i](vnode, rm);
6195        }
6196        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
6197          i(vnode, rm);
6198        } else {
6199          rm();
6200        }
6201      } else {
6202        removeNode(vnode.elm);
6203      }
6204    }
6205
6206    function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
6207      var oldStartIdx = 0;
6208      var newStartIdx = 0;
6209      var oldEndIdx = oldCh.length - 1;
6210      var oldStartVnode = oldCh[0];
6211      var oldEndVnode = oldCh[oldEndIdx];
6212      var newEndIdx = newCh.length - 1;
6213      var newStartVnode = newCh[0];
6214      var newEndVnode = newCh[newEndIdx];
6215      var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
6216
6217      // removeOnly is a special flag used only by <transition-group>
6218      // to ensure removed elements stay in correct relative positions
6219      // during leaving transitions
6220      var canMove = !removeOnly;
6221
6222      {
6223        checkDuplicateKeys(newCh);
6224      }
6225
6226      while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
6227        if (isUndef(oldStartVnode)) {
6228          oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
6229        } else if (isUndef(oldEndVnode)) {
6230          oldEndVnode = oldCh[--oldEndIdx];
6231        } else if (sameVnode(oldStartVnode, newStartVnode)) {
6232          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
6233          oldStartVnode = oldCh[++oldStartIdx];
6234          newStartVnode = newCh[++newStartIdx];
6235        } else if (sameVnode(oldEndVnode, newEndVnode)) {
6236          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
6237          oldEndVnode = oldCh[--oldEndIdx];
6238          newEndVnode = newCh[--newEndIdx];
6239        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
6240          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
6241          canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
6242          oldStartVnode = oldCh[++oldStartIdx];
6243          newEndVnode = newCh[--newEndIdx];
6244        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
6245          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
6246          canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
6247          oldEndVnode = oldCh[--oldEndIdx];
6248          newStartVnode = newCh[++newStartIdx];
6249        } else {
6250          if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
6251          idxInOld = isDef(newStartVnode.key)
6252            ? oldKeyToIdx[newStartVnode.key]
6253            : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
6254          if (isUndef(idxInOld)) { // New element
6255            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
6256          } else {
6257            vnodeToMove = oldCh[idxInOld];
6258            if (sameVnode(vnodeToMove, newStartVnode)) {
6259              patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
6260              oldCh[idxInOld] = undefined;
6261              canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
6262            } else {
6263              // same key but different element. treat as new element
6264              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
6265            }
6266          }
6267          newStartVnode = newCh[++newStartIdx];
6268        }
6269      }
6270      if (oldStartIdx > oldEndIdx) {
6271        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
6272        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
6273      } else if (newStartIdx > newEndIdx) {
6274        removeVnodes(oldCh, oldStartIdx, oldEndIdx);
6275      }
6276    }
6277
6278    function checkDuplicateKeys (children) {
6279      var seenKeys = {};
6280      for (var i = 0; i < children.length; i++) {
6281        var vnode = children[i];
6282        var key = vnode.key;
6283        if (isDef(key)) {
6284          if (seenKeys[key]) {
6285            warn(
6286              ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
6287              vnode.context
6288            );
6289          } else {
6290            seenKeys[key] = true;
6291          }
6292        }
6293      }
6294    }
6295
6296    function findIdxInOld (node, oldCh, start, end) {
6297      for (var i = start; i < end; i++) {
6298        var c = oldCh[i];
6299        if (isDef(c) && sameVnode(node, c)) { return i }
6300      }
6301    }
6302
6303    function patchVnode (
6304      oldVnode,
6305      vnode,
6306      insertedVnodeQueue,
6307      ownerArray,
6308      index,
6309      removeOnly
6310    ) {
6311      if (oldVnode === vnode) {
6312        return
6313      }
6314

6315      if (isDef(vnode.elm) && isDef(ownerArray)) {
6316        // clone reused vnode
6317        vnode = ownerArray[index] = cloneVNode(vnode);
6318      }
6319
6320      var elm = vnode.elm = oldVnode.elm;
6321
6322      if (isTrue(oldVnode.isAsyncPlaceholder)) {
6323        if (isDef(vnode.asyncFactory.resolved)) {
6324          hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
6325        } else {
6326          vnode.isAsyncPlaceholder = true;
6327        }
6328        return
6329      }
6330
6331      // reuse element for static trees.
6332      // note we only do this if the vnode is cloned -
6333      // if the new node is not cloned it means the render functions have been
6334      // reset by the hot-reload-api and we need to do a proper re-render.
6335      if (isTrue(vnode.isStatic) &&
6336        isTrue(oldVnode.isStatic) &&
6337        vnode.key === oldVnode.key &&
6338        (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
6339      ) {
6340        vnode.componentInstance = oldVnode.componentInstance;
6341        return
6342      }
6343
6344      var i;
6345      var data = vnode.data;
6346      if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
6347        i(oldVnode, vnode);
6348      }
6349
6350      var oldCh = oldVnode.children;
6351      var ch = vnode.children;
6352      if (isDef(data) && isPatchable(vnode)) {
6353        for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
6354        if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
6355      }
6356      if (isUndef(vnode.text)) {
6357        if (isDef(oldCh) && isDef(ch)) {
6358          if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
6359        } else if (isDef(ch)) {
6360          {
6361            checkDuplicateKeys(ch);
6362          }
6363          if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
6364          addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
6365        } else if (isDef(oldCh)) {
6366          removeVnodes(oldCh, 0, oldCh.length - 1);
6367        } else if (isDef(oldVnode.text)) {
6368          nodeOps.setTextContent(elm, '');
6369        }
6370      } else if (oldVnode.text !== vnode.text) {
6371        nodeOps.setTextContent(elm, vnode.text);
6372      }
6373      if (isDef(data)) {
6374        if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
6375      }
6376    }
6377
6378    function invokeInsertHook (vnode, queue, initial) {
6379      // delay insert hooks for component root nodes, invoke them after the
6380      // element is really inserted
6381      if (isTrue(initial) && isDef(vnode.parent)) {
6382        vnode.parent.data.pendingInsert = queue;
6383      } else {
6384        for (var i = 0; i < queue.length; ++i) {
6385          queue[i].data.hook.insert(queue[i]);
6386        }
6387      }
6388    }
6389
6390    var hydrationBailed = false;
6391    // list of modules that can skip create hook during hydration because they
6392    // are already rendered on the client or has no need for initialization
6393    // Note: style is excluded because it relies on initial clone for future
6394    // deep updates (#7063).
6395    var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
6396
6397    // Note: this is a browser-only function so we can assume elms are DOM nodes.
6398    function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
6399      var i;
6400      var tag = vnode.tag;
6401      var data = vnode.data;
6402      var children = vnode.children;
6403      inVPre = inVPre || (data && data.pre);
6404      vnode.elm = elm;
6405
6406      if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
6407        vnode.isAsyncPlaceholder = true;
6408        return true
6409      }
6410      // assert node match
6411      {
6412        if (!assertNodeMatch(elm, vnode, inVPre)) {
6413          return false
6414        }
6415      }
6416      if (isDef(data)) {
6417        if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
6418        if (isDef(i = vnode.componentInstance)) {
6419          // child component. it should have hydrated its own tree.
6420          initComponent(vnode, insertedVnodeQueue);
6421          return true
6422        }
6423      }
6424      if (isDef(tag)) {
6425        if (isDef(children)) {
6426          // empty element, allow client to pick up and populate children
6427          if (!elm.hasChildNodes()) {
6428            createChildren(vnode, children, insertedVnodeQueue);
6429          } else {
6430            // v-html and domProps: innerHTML
6431            if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
6432              if (i !== elm.innerHTML) {
6433                /* istanbul ignore if */
6434                if (typeof console !== 'undefined' &&
6435                  !hydrationBailed
6436                ) {
6437                  hydrationBailed = true;
6438                  console.warn('Parent: ', elm);
6439                  console.warn('server innerHTML: ', i);
6440                  console.warn('client innerHTML: ', elm.innerHTML);
6441                }
6442                return false
6443              }
6444            } else {
6445              // iterate and compare children lists
6446              var childrenMatch = true;
6447              var childNode = elm.firstChild;
6448              for (var i$1 = 0; i$1 < children.length; i$1++) {
6449                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
6450                  childrenMatch = false;

6451                  break
6452                }
6453                childNode = childNode.nextSibling;
6454              }
6455              // if childNode is not null, it means the actual childNodes list is
6456              // longer than the virtual children list.
6457              if (!childrenMatch || childNode) {
6458                /* istanbul ignore if */
6459                if (typeof console !== 'undefined' &&
6460                  !hydrationBailed
6461                ) {
6462                  hydrationBailed = true;
6463                  console.warn('Parent: ', elm);
6464                  console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
6465                }
6466                return false
6467              }
6468            }
6469          }
6470        }
6471        if (isDef(data)) {
6472          var fullInvoke = false;
6473          for (var key in data) {
6474            if (!isRenderedModule(key)) {
6475              fullInvoke = true;
6476              invokeCreateHooks(vnode, insertedVnodeQueue);
6477              break
6478            }
6479          }
6480          if (!fullInvoke && data['class']) {
6481            // ensure collecting deps for deep class bindings for future updates
6482            traverse(data['class']);
6483          }
6484        }
6485      } else if (elm.data !== vnode.text) {
6486        elm.data = vnode.text;
6487      }
6488      return true
6489    }
6490
6491    function assertNodeMatch (node, vnode, inVPre) {

6492      if (isDef(vnode.tag)) {
6493        return vnode.tag.indexOf('vue-component') === 0 || (
6494          !isUnknownElement$$1(vnode, inVPre) &&
6495          vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
6496        )
6497      } else {
6498        return node.nodeType === (vnode.isComment ? 8 : 3)
6499      }
6500    }
6501
6502    return function patch (oldVnode, vnode, hydrating, removeOnly) {
6503      if (isUndef(vnode)) {
6504        if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
6505        return
6506      }
6507
6508      var isInitialPatch = false;
6509      var insertedVnodeQueue = [];
6510
6511      if (isUndef(oldVnode)) {
6512        // empty mount (likely as component), create new root element
6513        isInitialPatch = true;
6514        createElm(vnode, insertedVnodeQueue);
6515      } else {
6516        var isRealElement = isDef(oldVnode.nodeType);
6517        if (!isRealElement && sameVnode(oldVnode, vnode)) {
6518          // patch existing root node
6519          patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
6520        } else {
6521          if (isRealElement) {
6522            // mounting to a real element
6523            // check if this is server-rendered content and if we can perform
6524            // a successful hydration.
6525            if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
6526              oldVnode.removeAttribute(SSR_ATTR);
6527              hydrating = true;
6528            }
6529            if (isTrue(hydrating)) {
6530              if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
6531                invokeInsertHook(vnode, insertedVnodeQueue, true);
6532                return oldVnode
6533              } else {
6534                warn(
6535                  'The client-side rendered virtual DOM tree is not matching ' +
6536                  'server-rendered content. This is likely caused by incorrect ' +
6537                  'HTML markup, for example nesting block-level elements inside ' +
6538                  '<p>, or missing <tbody>. Bailing hydration and performing ' +
6539                  'full client-side render.'
6540                );
6541              }
6542            }
6543            // either not server-rendered, or hydration failed.
6544            // create an empty node and replace it
6545            oldVnode = emptyNodeAt(oldVnode);
6546          }
6547
6548          // replacing existing element
6549          var oldElm = oldVnode.elm;
6550          var parentElm = nodeOps.parentNode(oldElm);
6551
6552          // create new node
6553          createElm(
6554            vnode,
6555            insertedVnodeQueue,
6556            // extremely rare edge case: do not insert if old element is in a
6557            // leaving transition. Only happens when combining transition +
6558            // keep-alive + HOCs. (#4590)
6559            oldElm._leaveCb ? null : parentElm,
6560            nodeOps.nextSibling(oldElm)
6561          );
6562
6563          // update parent placeholder node element, recursively

6564          if (isDef(vnode.parent)) {
6565            var ancestor = vnode.parent;
6566            var patchable = isPatchable(vnode);
6567            while (ancestor) {
6568              for (var i = 0; i < cbs.destroy.length; ++i) {
6569                cbs.destroy[i](ancestor);
6570              }
6571              ancestor.elm = vnode.elm;
6572              if (patchable) {
6573                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
6574                  cbs.create[i$1](emptyNode, ancestor);
6575                }
6576                // #6513
6577                // invoke insert hooks that may have been merged by create hooks.
6578                // e.g. for directives that uses the "inserted" hook.
6579                var insert = ancestor.data.hook.insert;
6580                if (insert.merged) {
6581                  // start at index 1 to avoid re-invoking component mounted hook
6582                  for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
6583                    insert.fns[i$2]();
6584                  }
6585                }
6586              } else {
6587                registerRef(ancestor);
6588              }
6589              ancestor = ancestor.parent;
6590            }
6591          }
6592
6593          // destroy old node
6594          if (isDef(parentElm)) {
6595            removeVnodes([oldVnode], 0, 0);
6596          } else if (isDef(oldVnode.tag)) {
6597            invokeDestroyHook(oldVnode);
6598          }
6599        }
6600      }
6601
6602      invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
6603      return vnode.elm
6604    }
6605  }
6606
6607  /*  */
6608
6609  var directives = {
6610    create: updateDirectives,
6611    update: updateDirectives,
6612    destroy: function unbindDirectives (vnode) {
6613      updateDirectives(vnode, emptyNode);
6614    }
6615  };
6616
6617  function updateDirectives (oldVnode, vnode) {
6618    if (oldVnode.data.directives || vnode.data.directives) {
6619      _update(oldVnode, vnode);
6620    }
6621  }
6622
6623  function _update (oldVnode, vnode) {
6624    var isCreate = oldVnode === emptyNode;
6625    var isDestroy = vnode === emptyNode;
6626    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
6627    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
6628
6629    var dirsWithInsert = [];
6630    var dirsWithPostpatch = [];
6631
6632    var key, oldDir, dir;
6633    for (key in newDirs) {
6634      oldDir = oldDirs[key];
6635      dir = newDirs[key];
6636      if (!oldDir) {
6637        // new directive, bind
6638        callHook$1(dir, 'bind', vnode, oldVnode);
6639        if (dir.def && dir.def.inserted) {
6640          dirsWithInsert.push(dir);
6641        }
6642      } else {
6643        // existing directive, update
6644        dir.oldValue = oldDir.value;
6645        dir.oldArg = oldDir.arg;
6646        callHook$1(dir, 'update', vnode, oldVnode);
6647        if (dir.def && dir.def.componentUpdated) {
6648          dirsWithPostpatch.push(dir);
6649        }
6650      }
6651    }
6652
6653    if (dirsWithInsert.length) {
6654      var callInsert = function () {
6655        for (var i = 0; i < dirsWithInsert.length; i++) {
6656          callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
6657        }
6658      };
6659      if (isCreate) {
6660        mergeVNodeHook(vnode, 'insert', callInsert);
6661      } else {
6662        callInsert();
6663      }
6664    }
6665
6666    if (dirsWithPostpatch.length) {
6667      mergeVNodeHook(vnode, 'postpatch', function () {
6668        for (var i = 0; i < dirsWithPostpatch.length; i++) {
6669          callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
6670        }
6671      });
6672    }
6673
6674    if (!isCreate) {
6675      for (key in oldDirs) {
6676        if (!newDirs[key]) {
6677          // no longer present, unbind
6678          callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
6679        }
6680      }
6681    }
6682  }
6683
6684  var emptyModifiers = Object.create(null);
6685
6686  function normalizeDirectives$1 (
6687    dirs,
6688    vm
6689  ) {
6690    var res = Object.create(null);
6691    if (!dirs) {
6692      // $flow-disable-line
6693      return res
6694    }
6695    var i, dir;
6696    for (i = 0; i < dirs.length; i++) {
6697      dir = dirs[i];
6698      if (!dir.modifiers) {
6699        // $flow-disable-line
6700        dir.modifiers = emptyModifiers;
6701      }
6702      res[getRawDirName(dir)] = dir;
6703      dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
6704    }
6705    // $flow-disable-line
6706    return res
6707  }
6708
6709  function getRawDirName (dir) {
6710    return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
6711  }
6712
6713  function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
6714    var fn = dir.def && dir.def[hook];
6715    if (fn) {

6716      try {
6717        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
6718      } catch (e) {
6719        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
6720      }
6721    }
6722  }
6723
6724  var baseModules = [
6725    ref,
6726    directives
6727  ];
6728
6729  /*  */
6730
6731  function updateAttrs (oldVnode, vnode) {
6732    var opts = vnode.componentOptions;
6733    if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
6734      return
6735    }
6736    if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
6737      return
6738    }
6739    var key, cur, old;
6740    var elm = vnode.elm;
6741    var oldAttrs = oldVnode.data.attrs || {};
6742    var attrs = vnode.data.attrs || {};
6743    // clone observed objects, as the user probably wants to mutate it
6744    if (isDef(attrs.__ob__)) {
6745      attrs = vnode.data.attrs = extend({}, attrs);
6746    }
6747
6748    for (key in attrs) {
6749      cur = attrs[key];
6750      old = oldAttrs[key];
6751      if (old !== cur) {
6752        setAttr(elm, key, cur, vnode.data.pre);
6753      }
6754    }
6755    // #4391: in IE9, setting type can reset value for input[type=radio]
6756    // #6666: IE/Edge forces progress value down to 1 before setting a max
6757    /* istanbul ignore if */
6758    if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
6759      setAttr(elm, 'value', attrs.value);
6760    }
6761    for (key in oldAttrs) {
6762      if (isUndef(attrs[key])) {
6763        if (isXlink(key)) {
6764          elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
6765        } else if (!isEnumeratedAttr(key)) {
6766          elm.removeAttribute(key);
6767        }
6768      }
6769    }
6770  }
6771
6772  function setAttr (el, key, value, isInPre) {
6773    if (isInPre || el.tagName.indexOf('-') > -1) {
6774      baseSetAttr(el, key, value);
6775    } else if (isBooleanAttr(key)) {
6776      // set attribute for blank value
6777      // e.g. <option disabled>Select one</option>
6778      if (isFalsyAttrValue(value)) {
6779        el.removeAttribute(key);
6780      } else {
6781        // technically allowfullscreen is a boolean attribute for <iframe>,
6782        // but Flash expects a value of "true" when used on <embed> tag
6783        value = key === 'allowfullscreen' && el.tagName === 'EMBED'
6784          ? 'true'
6785          : key;
6786        el.setAttribute(key, value);
6787      }
6788    } else if (isEnumeratedAttr(key)) {
6789      el.setAttribute(key, convertEnumeratedValue(key, value));
6790    } else if (isXlink(key)) {
6791      if (isFalsyAttrValue(value)) {
6792        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
6793      } else {
6794        el.setAttributeNS(xlinkNS, key, value);
6795      }
6796    } else {
6797      baseSetAttr(el, key, value);
6798    }
6799  }
6800
6801  function baseSetAttr (el, key, value) {
6802    if (isFalsyAttrValue(value)) {
6803      el.removeAttribute(key);
6804    } else {
6805      // #7138: IE10 & 11 fires input event when setting placeholder on
6806      // <textarea>... block the first input event and remove the blocker
6807      // immediately.
6808      /* istanbul ignore if */
6809      if (
6810        isIE && !isIE9 &&
6811        el.tagName === 'TEXTAREA' &&
6812        key === 'placeholder' && value !== '' && !el.__ieph
6813      ) {
6814        var blocker = function (e) {
6815          e.stopImmediatePropagation();
6816          el.removeEventListener('input', blocker);
6817        };
6818        el.addEventListener('input', blocker);
6819        // $flow-disable-line
6820        el.__ieph = true; /* IE placeholder patched */
6821      }
6822      el.setAttribute(key, value);
6823    }
6824  }
6825
6826  var attrs = {
6827    create: updateAttrs,
6828    update: updateAttrs
6829  };
6830
6831  /*  */
6832
6833  function updateClass (oldVnode, vnode) {
6834    var el = vnode.elm;
6835    var data = vnode.data;
6836    var oldData = oldVnode.data;
6837    if (
6838      isUndef(data.staticClass) &&
6839      isUndef(data.class) && (
6840        isUndef(oldData) || (
6841          isUndef(oldData.staticClass) &&
6842          isUndef(oldData.class)
6843        )
6844      )
6845    ) {
6846      return
6847    }
6848
6849    var cls = genClassForVnode(vnode);
6850
6851    // handle transition classes
6852    var transitionClass = el._transitionClasses;
6853    if (isDef(transitionClass)) {
6854      cls = concat(cls, stringifyClass(transitionClass));
6855    }
6856
6857    // set the class
6858    if (cls !== el._prevClass) {
6859      el.setAttribute('class', cls);
6860      el._prevClass = cls;
6861    }
6862  }
6863
6864  var klass = {
6865    create: updateClass,
6866    update: updateClass
6867  };
6868
6869  /*  */
6870

6871  var validDivisionCharRE = /[\w).+\-_$\]]/;
6872
6873  function parseFilters (exp) {
6874    var inSingle = false;
6875    var inDouble = false;
6876    var inTemplateString = false;
6877    var inRegex = false;
6878    var curly = 0;
6879    var square = 0;
6880    var paren = 0;
6881    var lastFilterIndex = 0;
6882    var c, prev, i, expression, filters;
6883
6884    for (i = 0; i < exp.length; i++) {
6885      prev = c;
6886      c = exp.charCodeAt(i);
6887      if (inSingle) {
6888        if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
6889      } else if (inDouble) {
6890        if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
6891      } else if (inTemplateString) {
6892        if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
6893      } else if (inRegex) {
6894        if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
6895      } else if (
6896        c === 0x7C && // pipe
6897        exp.charCodeAt(i + 1) !== 0x7C &&
6898        exp.charCodeAt(i - 1) !== 0x7C &&
6899        !curly && !square && !paren
6900      ) {
6901        if (expression === undefined) {
6902          // first filter, end of expression
6903          lastFilterIndex = i + 1;
6904          expression = exp.slice(0, i).trim();
6905        } else {
6906          pushFilter();
6907        }
6908      } else {
6909        switch (c) {
6910          case 0x22: inDouble = true; break         // "
6911          case 0x27: inSingle = true; break         // '
6912          case 0x60: inTemplateString = true; break // `
6913          case 0x28: paren++; break                 // (
6914          case 0x29: paren--; break                 // )
6915          case 0x5B: square++; break                // [
6916          case 0x5D: square--; break                // ]
6917          case 0x7B: curly++; break                 // {
6918          case 0x7D: curly--; break                 // }
6919        }
6920        if (c === 0x2f) { // /
6921          var j = i - 1;
6922          var p = (void 0);
6923          // find first non-whitespace prev char
6924          for (; j >= 0; j--) {
6925            p = exp.charAt(j);
6926            if (p !== ' ') { break }
6927          }
6928          if (!p || !validDivisionCharRE.test(p)) {
6929            inRegex = true;
6930          }
6931        }
6932      }
6933    }
6934
6935    if (expression === undefined) {
6936      expression = exp.slice(0, i).trim();
6937    } else if (lastFilterIndex !== 0) {
6938      pushFilter();
6939    }
6940
6941    function pushFilter () {
6942      (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
6943      lastFilterIndex = i + 1;
6944    }
6945
6946    if (filters) {
6947      for (i = 0; i < filters.length; i++) {
6948        expression = wrapFilter(expression, filters[i]);
6949      }
6950    }
6951
6952    return expression
6953  }
6954
6955  function wrapFilter (exp, filter) {
6956    var i = filter.indexOf('(');
6957    if (i < 0) {
6958      // _f: resolveFilter
6959      return ("_f(\"" + filter + "\")(" + exp + ")")
6960    } else {
6961      var name = filter.slice(0, i);
6962      var args = filter.slice(i + 1);
6963      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
6964    }
6965  }
6966
6967  /*  */
6968
6969
6970
6971  /* eslint-disable no-unused-vars */
6972  function baseWarn (msg, range) {
6973    console.error(("[Vue compiler]: " + msg));
6974  }
6975  /* eslint-enable no-unused-vars */
6976
6977  function pluckModuleFunction (
6978    modules,
6979    key
6980  ) {
6981    return modules
6982      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
6983      : []
6984  }
6985
6986  function addProp (el, name, value, range, dynamic) {
6987    (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
6988    el.plain = false;
6989  }
6990
6991  function addAttr (el, name, value, range, dynamic) {
6992    var attrs = dynamic
6993      ? (el.dynamicAttrs || (el.dynamicAttrs = []))
6994      : (el.attrs || (el.attrs = []));
6995    attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
6996    el.plain = false;
6997  }
6998
6999  // add a raw attr (use this in preTransforms)
7000  function addRawAttr (el, name, value, range) {
7001    el.attrsMap[name] = value;
7002    el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
7003  }
7004
7005  function addDirective (
7006    el,
7007    name,
7008    rawName,
7009    value,
7010    arg,
7011    isDynamicArg,
7012    modifiers,
7013    range
7014  ) {
7015    (el.directives || (el.directives = [])).push(rangeSetItem({
7016      name: name,
7017      rawName: rawName,
7018      value: value,
7019      arg: arg,
7020      isDynamicArg: isDynamicArg,
7021      modifiers: modifiers
7022    }, range));
7023    el.plain = false;

7024  }
7025
7026  function prependModifierMarker (symbol, name, dynamic) {
7027    return dynamic
7028      ? ("_p(" + name + ",\"" + symbol + "\")")
7029      : symbol + name // mark the event as captured
7030  }
7031
7032  function addHandler (
7033    el,
7034    name,
7035    value,
7036    modifiers,
7037    important,
7038    warn,
7039    range,
7040    dynamic
7041  ) {
7042    modifiers = modifiers || emptyObject;
7043    // warn prevent and passive modifier
7044    /* istanbul ignore if */
7045    if (
7046      warn &&
7047      modifiers.prevent && modifiers.passive
7048    ) {
7049      warn(
7050        'passive and prevent can\'t be used together. ' +
7051        'Passive handler can\'t prevent default event.',
7052        range
7053      );
7054    }
7055
7056    // normalize click.right and click.middle since they don't actually fire
7057    // this is technically browser-specific, but at least for now browsers are
7058    // the only target envs that have right/middle clicks.
7059    if (modifiers.right) {
7060      if (dynamic) {
7061        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
7062      } else if (name === 'click') {
7063        name = 'contextmenu';
7064        delete modifiers.right;
7065      }
7066    } else if (modifiers.middle) {
7067      if (dynamic) {
7068        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
7069      } else if (name === 'click') {
7070        name = 'mouseup';
7071      }
7072    }
7073
7074    // check capture modifier
7075    if (modifiers.capture) {
7076      delete modifiers.capture;
7077      name = prependModifierMarker('!', name, dynamic);
7078    }
7079    if (modifiers.once) {
7080      delete modifiers.once;
7081      name = prependModifierMarker('~', name, dynamic);
7082    }
7083    /* istanbul ignore if */
7084    if (modifiers.passive) {
7085      delete modifiers.passive;
7086      name = prependModifierMarker('&', name, dynamic);
7087    }
7088
7089    var events;
7090    if (modifiers.native) {
7091      delete modifiers.native;
7092      events = el.nativeEvents || (el.nativeEvents = {});
7093    } else {
7094      events = el.events || (el.events = {});
7095    }
7096
7097    var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
7098    if (modifiers !== emptyObject) {
7099      newHandler.modifiers = modifiers;
7100    }
7101
7102    var handlers = events[name];
7103    /* istanbul ignore if */
7104    if (Array.isArray(handlers)) {
7105      important ? handlers.unshift(newHandler) : handlers.push(newHandler);
7106    } else if (handlers) {
7107      events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
7108    } else {
7109      events[name] = newHandler;
7110    }
7111
7112    el.plain = false;
7113  }
7114
7115  function getRawBindingAttr (
7116    el,
7117    name
7118  ) {
7119    return el.rawAttrsMap[':' + name] ||
7120      el.rawAttrsMap['v-bind:' + name] ||
7121      el.rawAttrsMap[name]
7122  }
7123
7124  function getBindingAttr (
7125    el,
7126    name,
7127    getStatic
7128  ) {
7129    var dynamicValue =
7130      getAndRemoveAttr(el, ':' + name) ||
7131      getAndRemoveAttr(el, 'v-bind:' + name);
7132    if (dynamicValue != null) {
7133      return parseFilters(dynamicValue)
7134    } else if (getStatic !== false) {
7135      var staticValue = getAndRemoveAttr(el, name);
7136      if (staticValue != null) {
7137        return JSON.stringify(staticValue)
7138      }
7139    }
7140  }
7141
7142  // note: this only removes the attr from the Array (attrsList) so that it
7143  // doesn't get processed by processAttrs.
7144  // By default it does NOT remove it from the map (attrsMap) because the map is
7145  // needed during codegen.
7146  function getAndRemoveAttr (
7147    el,
7148    name,
7149    removeFromMap
7150  ) {
7151    var val;
7152    if ((val = el.attrsMap[name]) != null) {
7153      var list = el.attrsList;
7154      for (var i = 0, l = list.length; i < l; i++) {
7155        if (list[i].name === name) {
7156          list.splice(i, 1);
7157          break
7158        }
7159      }
7160    }
7161    if (removeFromMap) {
7162      delete el.attrsMap[name];
7163    }
7164    return val
7165  }
7166
7167  function getAndRemoveAttrByRegex (
7168    el,
7169    name
7170  ) {
7171    var list = el.attrsList;
7172    for (var i = 0, l = list.length; i < l; i++) {
7173      var attr = list[i];
7174      if (name.test(attr.name)) {
7175        list.splice(i, 1);
7176        return attr
7177      }
7178    }
7179  }
7180
7181  function rangeSetItem (
7182    item,
7183    range
7184  ) {
7185    if (range) {
7186      if (range.start != null) {
7187        item.start = range.start;
7188      }
7189      if (range.end != null) {
7190        item.end = range.end;
7191      }
7192    }
7193    return item
7194  }
7195
7196  /*  */
7197
7198  /**
7199   * Cross-platform code generation for component v-model
7200   */
7201  function genComponentModel (
7202    el,
7203    value,
7204    modifiers
7205  ) {
7206    var ref = modifiers || {};
7207    var number = ref.number;
7208    var trim = ref.trim;
7209
7210    var baseValueExpression = '$$v';
7211    var valueExpression = baseValueExpression;
7212    if (trim) {
7213      valueExpression =
7214        "(typeof " + baseValueExpression + " === 'string'" +
7215        "? " + baseValueExpression + ".trim()" +
7216        ": " + baseValueExpression + ")";
7217    }
7218    if (number) {
7219      valueExpression = "_n(" + valueExpression + ")";
7220    }

7221    var assignment = genAssignmentCode(value, valueExpression);
7222
7223    el.model = {
7224      value: ("(" + value + ")"),
7225      expression: JSON.stringify(value),
7226      callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
7227    };
7228  }
7229
7230  /**
7231   * Cross-platform codegen helper for generating v-model value assignment code.
7232   */
7233  function genAssignmentCode (
7234    value,
7235    assignment
7236  ) {
7237    var res = parseModel(value);
7238    if (res.key === null) {
7239      return (value + "=" + assignment)
7240    } else {
7241      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
7242    }
7243  }
7244
7245  /**
7246   * Parse a v-model expression into a base path and a final key segment.
7247   * Handles both dot-path and possible square brackets.
7248   *
7249   * Possible cases:
7250   *
7251   * - test
7252   * - test[key]
7253   * - test[test1[key]]
7254   * - test["a"][key]
7255   * - xxx.test[a[a].test1[key]]
7256   * - test.xxx.a["asa"][test1[key]]
7257   *
7258   */
7259
7260  var len, str, chr, index$1, expressionPos, expressionEndPos;
7261
7262
7263
7264  function parseModel (val) {
7265    // Fix https://github.com/vuejs/vue/pull/7730
7266    // allow v-model="obj.val " (trailing whitespace)
7267    val = val.trim();
7268    len = val.length;
7269
7270    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
7271      index$1 = val.lastIndexOf('.');
7272      if (index$1 > -1) {
7273        return {
7274          exp: val.slice(0, index$1),
7275          key: '"' + val.slice(index$1 + 1) + '"'
7276        }
7277      } else {
7278        return {
7279          exp: val,
7280          key: null
7281        }
7282      }
7283    }
7284
7285    str = val;
7286    index$1 = expressionPos = expressionEndPos = 0;
7287
7288    while (!eof()) {
7289      chr = next();
7290      /* istanbul ignore if */
7291      if (isStringStart(chr)) {
7292        parseString(chr);
7293      } else if (chr === 0x5B) {
7294        parseBracket(chr);
7295      }
7296    }
7297
7298    return {
7299      exp: val.slice(0, expressionPos),
7300      key: val.slice(expressionPos + 1, expressionEndPos)
7301    }
7302  }
7303
7304  function next () {
7305    return str.charCodeAt(++index$1)
7306  }
7307
7308  function eof () {
7309    return index$1 >= len
7310  }
7311
7312  function isStringStart (chr) {
7313    return chr === 0x22 || chr === 0x27
7314  }
7315
7316  function parseBracket (chr) {
7317    var inBracket = 1;
7318    expressionPos = index$1;
7319    while (!eof()) {
7320      chr = next();
7321      if (isStringStart(chr)) {
7322        parseString(chr);
7323        continue
7324      }
7325      if (chr === 0x5B) { inBracket++; }
7326      if (chr === 0x5D) { inBracket--; }
7327      if (inBracket === 0) {
7328        expressionEndPos = index$1;
7329        break
7330      }
7331    }
7332  }
7333
7334  function parseString (chr) {
7335    var stringQuote = chr;
7336    while (!eof()) {
7337      chr = next();
7338      if (chr === stringQuote) {
7339        break
7340      }
7341    }
7342  }
7343
7344  /*  */
7345
7346  var warn$1;
7347
7348  // in some cases, the event used has to be determined at runtime
7349  // so we used some reserved tokens during compile.
7350  var RANGE_TOKEN = '__r';
7351  var CHECKBOX_RADIO_TOKEN = '__c';
7352
7353  function model (
7354    el,
7355    dir,
7356    _warn
7357  ) {
7358    warn$1 = _warn;
7359    var value = dir.value;
7360    var modifiers = dir.modifiers;
7361    var tag = el.tag;
7362    var type = el.attrsMap.type;
7363
7364    {
7365      // inputs with type="file" are read only and setting the input's
7366      // value will throw an error.
7367      if (tag === 'input' && type === 'file') {
7368        warn$1(
7369          "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
7370          "File inputs are read only. Use a v-on:change listener instead.",
7371          el.rawAttrsMap['v-model']
7372        );
7373      }
7374    }
7375
7376    if (el.component) {
7377      genComponentModel(el, value, modifiers);
7378      // component v-model doesn't need extra runtime
7379      return false
7380    } else if (tag === 'select') {
7381      genSelect(el, value, modifiers);
7382    } else if (tag === 'input' && type === 'checkbox') {
7383      genCheckboxModel(el, value, modifiers);
7384    } else if (tag === 'input' && type === 'radio') {
7385      genRadioModel(el, value, modifiers);
7386    } else if (tag === 'input' || tag === 'textarea') {
7387      genDefaultModel(el, value, modifiers);
7388    } else if (!config.isReservedTag(tag)) {
7389      genComponentModel(el, value, modifiers);
7390      // component v-model doesn't need extra runtime
7391      return false
7392    } else {
7393      warn$1(
7394        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
7395        "v-model is not supported on this element type. " +
7396        'If you are working with contenteditable, it\'s recommended to ' +
7397        'wrap a library dedicated for that purpose inside a custom component.',
7398        el.rawAttrsMap['v-model']
7399      );
7400    }
7401
7402    // ensure runtime directive metadata
7403    return true
7404  }
7405

7406  function genCheckboxModel (
7407    el,
7408    value,
7409    modifiers
7410  ) {
7411    var number = modifiers && modifiers.number;
7412    var valueBinding = getBindingAttr(el, 'value') || 'null';
7413    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
7414    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
7415    addProp(el, 'checked',
7416      "Array.isArray(" + value + ")" +
7417      "?_i(" + value + "," + valueBinding + ")>-1" + (
7418        trueValueBinding === 'true'
7419          ? (":(" + value + ")")
7420          : (":_q(" + value + "," + trueValueBinding + ")")
7421      )
7422    );
7423    addHandler(el, 'change',
7424      "var $$a=" + value + "," +
7425          '$$el=$event.target,' +
7426          "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
7427      'if(Array.isArray($$a)){' +
7428        "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
7429            '$$i=_i($$a,$$v);' +
7430        "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
7431        "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
7432      "}else{" + (genAssignmentCode(value, '$$c')) + "}",
7433      null, true
7434    );
7435  }
7436
7437  function genRadioModel (
7438    el,
7439    value,
7440    modifiers
7441  ) {
7442    var number = modifiers && modifiers.number;
7443    var valueBinding = getBindingAttr(el, 'value') || 'null';
7444    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
7445    addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
7446    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
7447  }
7448
7449  function genSelect (
7450    el,
7451    value,
7452    modifiers
7453  ) {
7454    var number = modifiers && modifiers.number;
7455    var selectedVal = "Array.prototype.filter" +
7456      ".call($event.target.options,function(o){return o.selected})" +
7457      ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
7458      "return " + (number ? '_n(val)' : 'val') + "})";
7459
7460    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
7461    var code = "var $$selectedVal = " + selectedVal + ";";
7462    code = code + " " + (genAssignmentCode(value, assignment));
7463    addHandler(el, 'change', code, null, true);
7464  }
7465
7466  function genDefaultModel (
7467    el,
7468    value,
7469    modifiers
7470  ) {
7471    var type = el.attrsMap.type;
7472
7473    // warn if v-bind:value conflicts with v-model
7474    // except for inputs with v-bind:type
7475    {
7476      var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
7477      var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
7478      if (value$1 && !typeBinding) {
7479        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
7480        warn$1(
7481          binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
7482          'because the latter already expands to a value binding internally',
7483          el.rawAttrsMap[binding]
7484        );
7485      }
7486    }
7487
7488    var ref = modifiers || {};
7489    var lazy = ref.lazy;
7490    var number = ref.number;
7491    var trim = ref.trim;
7492    var needCompositionGuard = !lazy && type !== 'range';
7493    var event = lazy
7494      ? 'change'
7495      : type === 'range'
7496        ? RANGE_TOKEN
7497        : 'input';
7498
7499    var valueExpression = '$event.target.value';
7500    if (trim) {
7501      valueExpression = "$event.target.value.trim()";
7502    }
7503    if (number) {
7504      valueExpression = "_n(" + valueExpression + ")";
7505    }
7506
7507    var code = genAssignmentCode(value, valueExpression);
7508    if (needCompositionGuard) {
7509      code = "if($event.target.composing)return;" + code;
7510    }
7511
7512    addProp(el, 'value', ("(" + value + ")"));
7513    addHandler(el, event, code, null, true);
7514    if (trim || number) {
7515      addHandler(el, 'blur', '$forceUpdate()');
7516    }
7517  }
7518
7519  /*  */
7520
7521  // normalize v-model event tokens that can only be determined at runtime.
7522  // it's important to place the event as the first in the array because
7523  // the whole point is ensuring the v-model callback gets called before
7524  // user-attached handlers.
7525  function normalizeEvents (on) {
7526    /* istanbul ignore if */
7527    if (isDef(on[RANGE_TOKEN])) {
7528      // IE input[type=range] only supports `change` event
7529      var event = isIE ? 'change' : 'input';
7530      on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
7531      delete on[RANGE_TOKEN];
7532    }
7533    // This was originally intended to fix #4521 but no longer necessary
7534    // after 2.5. Keeping it for backwards compat with generated code from < 2.4
7535    /* istanbul ignore if */
7536    if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
7537      on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
7538      delete on[CHECKBOX_RADIO_TOKEN];
7539    }
7540  }
7541
7542  var target$1;
7543
7544  function createOnceHandler$1 (event, handler, capture) {
7545    var _target = target$1; // save current target element in closure
7546    return function onceHandler () {
7547      var res = handler.apply(null, arguments);
7548      if (res !== null) {
7549        remove$2(event, onceHandler, capture, _target);
7550      }
7551    }
7552  }
7553
7554  // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
7555  // implementation and does not fire microtasks in between event propagation, so
7556  // safe to exclude.
7557  var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
7558
7559  function add$1 (
7560    name,
7561    handler,
7562    capture,
7563    passive
7564  ) {

7565    // async edge case #6566: inner click event triggers patch, event handler
7566    // attached to outer element during patch, and triggered again. This
7567    // happens because browsers fire microtask ticks between event propagation.
7568    // the solution is simple: we save the timestamp when a handler is attached,
7569    // and the handler would only fire if the event passed to it was fired
7570    // AFTER it was attached.
7571    if (useMicrotaskFix) {
7572      var attachedTimestamp = currentFlushTimestamp;
7573      var original = handler;
7574      handler = original._wrapper = function (e) {
7575        if (
7576          // no bubbling, should always fire.
7577          // this is just a safety net in case event.timeStamp is unreliable in
7578          // certain weird environments...
7579          e.target === e.currentTarget ||
7580          // event is fired after handler attachment
7581          e.timeStamp >= attachedTimestamp ||
7582          // bail for environments that have buggy event.timeStamp implementations
7583          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
7584          // #9681 QtWebEngine event.timeStamp is negative value
7585          e.timeStamp <= 0 ||
7586          // #9448 bail if event is fired in another document in a multi-page
7587          // electron/nw.js app, since event.timeStamp will be using a different
7588          // starting reference
7589          e.target.ownerDocument !== document
7590        ) {
7591          return original.apply(this, arguments)
7592        }
7593      };
7594    }
7595    target$1.addEventListener(
7596      name,
7597      handler,
7598      supportsPassive
7599        ? { capture: capture, passive: passive }
7600        : capture
7601    );
7602  }
7603
7604  function remove$2 (
7605    name,
7606    handler,
7607    capture,
7608    _target
7609  ) {
7610    (_target || target$1).removeEventListener(
7611      name,
7612      handler._wrapper || handler,
7613      capture
7614    );
7615  }
7616
7617  function updateDOMListeners (oldVnode, vnode) {
7618    if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
7619      return
7620    }
7621    var on = vnode.data.on || {};
7622    var oldOn = oldVnode.data.on || {};
7623    target$1 = vnode.elm;
7624    normalizeEvents(on);
7625    updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
7626    target$1 = undefined;
7627  }
7628
7629  var events = {
7630    create: updateDOMListeners,
7631    update: updateDOMListeners
7632  };
7633
7634  /*  */
7635
7636  var svgContainer;
7637
7638  function updateDOMProps (oldVnode, vnode) {
7639    if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
7640      return
7641    }
7642    var key, cur;
7643    var elm = vnode.elm;
7644    var oldProps = oldVnode.data.domProps || {};
7645    var props = vnode.data.domProps || {};
7646    // clone observed objects, as the user probably wants to mutate it
7647    if (isDef(props.__ob__)) {
7648      props = vnode.data.domProps = extend({}, props);
7649    }
7650
7651    for (key in oldProps) {
7652      if (!(key in props)) {
7653        elm[key] = '';
7654      }
7655    }
7656
7657    for (key in props) {
7658      cur = props[key];
7659      // ignore children if the node has textContent or innerHTML,
7660      // as these will throw away existing DOM nodes and cause removal errors
7661      // on subsequent patches (#3360)
7662      if (key === 'textContent' || key === 'innerHTML') {
7663        if (vnode.children) { vnode.children.length = 0; }
7664        if (cur === oldProps[key]) { continue }
7665        // #6601 work around Chrome version <= 55 bug where single textNode
7666        // replaced by innerHTML/textContent retains its parentNode property
7667        if (elm.childNodes.length === 1) {
7668          elm.removeChild(elm.childNodes[0]);
7669        }
7670      }
7671
7672      if (key === 'value' && elm.tagName !== 'PROGRESS') {
7673        // store value as _value as well since
7674        // non-string values will be stringified
7675        elm._value = cur;
7676        // avoid resetting cursor position when value is the same
7677        var strCur = isUndef(cur) ? '' : String(cur);
7678        if (shouldUpdateValue(elm, strCur)) {
7679          elm.value = strCur;
7680        }
7681      } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
7682        // IE doesn't support innerHTML for SVG elements
7683        svgContainer = svgContainer || document.createElement('div');
7684        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
7685        var svg = svgContainer.firstChild;
7686        while (elm.firstChild) {
7687          elm.removeChild(elm.firstChild);
7688        }
7689        while (svg.firstChild) {
7690          elm.appendChild(svg.firstChild);
7691        }
7692      } else if (
7693        // skip the update if old and new VDOM state is the same.
7694        // `value` is handled separately because the DOM value may be temporarily
7695        // out of sync with VDOM state due to focus, composition and modifiers.
7696        // This  #4521 by skipping the unnecessary `checked` update.
7697        cur !== oldProps[key]
7698      ) {
7699        // some property updates can throw
7700        // e.g. `value` on <progress> w/ non-finite value
7701        try {
7702          elm[key] = cur;
7703        } catch (e) {}
7704      }
7705    }
7706  }
7707
7708  // check platforms/web/util/attrs.js acceptValue
7709
7710
7711  function shouldUpdateValue (elm, checkVal) {
7712    return (!elm.composing && (
7713      elm.tagName === 'OPTION' ||
7714      isNotInFocusAndDirty(elm, checkVal) ||
7715      isDirtyWithModifiers(elm, checkVal)
7716    ))
7717  }
7718
7719  function isNotInFocusAndDirty (elm, checkVal) {
7720    // return true when textbox (.number and .trim) loses focus and its value is
7721    // not equal to the updated value
7722    var notInFocus = true;
7723    // #6157
7724    // work around IE bug when accessing document.activeElement in an iframe
7725    try { notInFocus = document.activeElement !== elm; } catch (e) {}
7726    return notInFocus && elm.value !== checkVal
7727  }
7728
7729  function isDirtyWithModifiers (elm, newVal) {
7730    var value = elm.value;
7731    var modifiers = elm._vModifiers; // injected by v-model runtime
7732    if (isDef(modifiers)) {
7733      if (modifiers.number) {
7734        return toNumber(value) !== toNumber(newVal)
7735      }
7736      if (modifiers.trim) {
7737        return value.trim() !== newVal.trim()
7738      }
7739    }
7740    return value !== newVal
7741  }
7742
7743  var domProps = {
7744    create: updateDOMProps,
7745    update: updateDOMProps
7746  };
7747
7748  /*  */
7749
7750  var parseStyleText = cached(function (cssText) {
7751    var res = {};
7752    var listDelimiter = /;(?![^(]*\))/g;
7753    var propertyDelimiter = /:(.+)/;
7754    cssText.split(listDelimiter).forEach(function (item) {
7755      if (item) {
7756        var tmp = item.split(propertyDelimiter);
7757        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
7758      }
7759    });
7760    return res
7761  });
7762
7763  // merge static and dynamic style data on the same vnode
7764  function normalizeStyleData (data) {
7765    var style = normalizeStyleBinding(data.style);
7766    // static style is pre-processed into an object during compilation
7767    // and is always a fresh object, so it's safe to merge into 

7767it
7768    return data.staticStyle
7769      ? extend(data.staticStyle, style)
7770      : style
7771  }
7772
7773  // normalize possible array / string values into Object
7774  function normalizeStyleBinding (bindingStyle) {
7775    if (Array.isArray(bindingStyle)) {
7776      return toObject(bindingStyle)
7777    }
7778    if (typeof bindingStyle === 'string') {
7779      return parseStyleText(bindingStyle)
7780    }
7781    return bindingStyle
7782  }
7783
7784  /**
7785   * parent component style should be after child's
7786   * so that parent component's style could override it
7787   */
7788  function getStyle (vnode, checkChild) {
7789    var res = {};
7790    var styleData;
7791
7792    if (checkChild) {
7793      var childNode = vnode;
7794      while (childNode.componentInstance) {
7795        childNode = childNode.componentInstance._vnode;
7796        if (
7797          childNode && childNode.data &&
7798          (styleData = normalizeStyleData(childNode.data))
7799        ) {
7800          extend(res, styleData);
7801        }
7802      }
7803    }
7804
7805    if ((styleData = normalizeStyleData(vnode.data))) {
7806      extend(res, styleData);
7807    }
7808
7809    var parentNode = vnode;
7810    while ((parentNode = parentNode.parent)) {
7811      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
7812        extend(res, styleData);
7813      }
7814    }
7815    return res
7816  }
7817
7818  /*  */
7819
7820  var cssVarRE = /^--/;
7821  var importantRE = /\s*!important$/;
7822  var setProp = function (el, name, val) {
7823    /* istanbul ignore if */
7824    if (cssVarRE.test(name)) {
7825      el.style.setProperty(name, val);
7826    } else if (importantRE.test(val)) {
7827      el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
7828    } else {
7829      var normalizedName = normalize(name);
7830      if (Array.isArray(val)) {
7831        // Support values array created by autoprefixer, e.g.
7832        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
7833        // Set them one by one, and the browser will only set those it can recognize
7834        for (var i = 0, len = val.length; i < len; i++) {
7835          el.style[normalizedName] = val[i];
7836        }
7837      } else {
7838        el.style[normalizedName] = val;
7839      }
7840    }
7841  };
7842
7843  var vendorNames = ['Webkit', 'Moz', 'ms'];
7844
7845  var emptyStyle;
7846  var normalize = cached(function (prop) {
7847    emptyStyle = emptyStyle || document.createElement('div').style;
7848    prop = camelize(prop);
7849    if (prop !== 'filter' && (prop in emptyStyle)) {
7850      return prop
7851    }
7852    var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
7853    for (var i = 0; i < vendorNames.length; i++) {
7854      var name = vendorNames[i] + capName;
7855      if (name in emptyStyle) {
7856        return name
7857      }
7858    }
7859  });
7860
7861  function updateStyle (oldVnode, vnode) {
7862    var data = vnode.data;
7863    var oldData = oldVnode.data;
7864
7865    if (isUndef(data.staticStyle) && isUndef(data.style) &&
7866      isUndef(oldData.staticStyle) && isUndef(oldData.style)
7867    ) {
7868      return
7869    }
7870
7871    var cur, name;
7872    var el = vnode.elm;
7873    var oldStaticStyle = oldData.staticStyle;
7874    var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
7875
7876    // if static style exists, stylebinding already merged into it when doing normalizeStyleData
7877    var oldStyle = oldStaticStyle || oldStyleBinding;
7878
7879    var style = normalizeStyleBinding(vnode.data.style) || {};
7880
7881    // store normalized style under a different key for next diff
7882    // make sure to clone it if it's reactive, since the user likely wants
7883    // to mutate it.
7884    vnode.data.normalizedStyle = isDef(style.__ob__)
7885      ? extend({}, style)
7886      : style;
7887
7888    var newStyle = getStyle(vnode, true);
7889
7890    for (name in oldStyle) {
7891      if (isUndef(newStyle[name])) {
7892        setProp(el, name, '');
7893      }
7894    }
7895    for (name in newStyle) {
7896      cur = newStyle[name];
7897      if (cur !== oldStyle[name]) {
7898        // ie9 setting to null has no effect, must use empty string
7899        setProp(el, name, cur == null ? '' : cur);
7900      }
7901    }
7902  }
7903
7904  var style = {
7905    create: updateStyle,
7906    update: updateStyle
7907  };
7908
7909  /*  */
7910
7911  var whitespaceRE = /\s+/;
7912
7913  /**
7914   * Add class with compatibility for SVG since classList is not supported on
7915   * SVG elements in IE
7916   */
7917  function addClass (el, cls) {
7918    /* istanbul ignore if */
7919    if (!cls || !(cls = cls.trim())) {
7920      return
7921    }
7922
7923    /* istanbul ignore else */
7924    if (el.classList) {
7925      if (cls.indexOf(' ') > -1) {

7926        cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
7927      } else {
7928        el.classList.add(cls);
7929      }
7930    } else {
7931      var cur = " " + (el.getAttribute('class') || '') + " ";
7932      if (cur.indexOf(' ' + cls + ' ') < 0) {
7933        el.setAttribute('class', (cur + cls).trim());
7934      }
7935    }
7936  }
7937
7938  /**
7939   * Remove class with compatibility for SVG since classList is not supported on
7940   * SVG elements in IE
7941   */
7942  function removeClass (el, cls) {
7943    /* istanbul ignore if */
7944    if (!cls || !(cls = cls.trim())) {
7945      return
7946    }
7947
7948    /* istanbul ignore else */
7949    if (el.classList) {
7950      if (cls.indexOf(' ') > -1) {
7951        cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
7952      } else {
7953        el.classList.remove(cls);
7954      }
7955      if (!el.classList.length) {
7956        el.removeAttribute('class');
7957      }
7958    } else {
7959      var cur = " " + (el.getAttribute('class') || '') + " ";
7960      var tar = ' ' + cls + ' ';
7961      while (cur.indexOf(tar) >= 0) {
7962        cur = cur.replace(tar, ' ');
7963      }
7964      cur = cur.trim();
7965      if (cur) {
7966        el.setAttribute('class', cur);
7967      } else {
7968        el.removeAttribute('class');
7969      }
7970    }
7971  }
7972
7973  /*  */
7974
7975  function resolveTransition (def$$1) {
7976    if (!def$$1) {
7977      return
7978    }
7979    /* istanbul ignore else */
7980    if (typeof def$$1 === 'object') {
7981      var res = {};
7982      if (def$$1.css !== false) {
7983        extend(res, autoCssTransition(def$$1.name || 'v'));
7984      }
7985      extend(res, def$$1);
7986      return res
7987    } else if (typeof def$$1 === 'string') {
7988      return autoCssTransition(def$$1)
7989    }
7990  }
7991
7992  var autoCssTransition = cached(function (name) {
7993    return {
7994      enterClass: (name + "-enter"),
7995      enterToClass: (name + "-enter-to"),
7996      enterActiveClass: (name + "-enter-active"),
7997      leaveClass: (name + "-leave"),
7998      leaveToClass: (name + "-leave-to"),
7999      leaveActiveClass: (name + "-leave-active")
8000    }
8001  });
8002
8003  var hasTransition = inBrowser && !isIE9;
8004  var TRANSITION = 'transition';
8005  var ANIMATION = 'animation';
8006
8007  // Transition property/event sniffing
8008  var transitionProp = 'transition';
8009  var transitionEndEvent = 'transitionend';
8010  var animationProp = 'animation';
8011  var animationEndEvent = 'animationend';
8012  if (hasTransition) {
8013    /* istanbul ignore if */
8014    if (window.ontransitionend === undefined &&
8015      window.onwebkittransitionend !== undefined
8016    ) {
8017      transitionProp = 'WebkitTransition';
8018      transitionEndEvent = 'webkitTransitionEnd';
8019    }
8020    if (window.onanimationend === undefined &&
8021      window.onwebkitanimationend !== undefined
8022    ) {
8023      animationProp = 'WebkitAnimation';
8024      animationEndEvent = 'webkitAnimationEnd';
8025    }
8026  }
8027
8028  // binding to window is necessary to make hot reload work in IE in strict mode
8029  var raf = inBrowser
8030    ? window.requestAnimationFrame
8031      ? window.requestAnimationFrame.bind(window)
8032      : setTimeout
8033    : /* istanbul ignore next */ function (fn) { return fn(); };
8034
8035  function nextFrame (fn) {
8036    raf(function () {
8037      raf(fn);
8038    });
8039  }
8040
8041  function addTransitionClass (el, cls) {
8042    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
8043    if (transitionClasses.indexOf(cls) < 0) {
8044      transitionClasses.push(cls);
8045      addClass(el, cls);
8046    }
8047  }
8048
8049  function removeTransitionClass (el, cls) {
8050    if (el._transitionClasses) {
8051      remove(el._transitionClasses, cls);
8052    }
8053    removeClass(el, cls);
8054  }
8055
8056  function whenTransitionEnds (
8057    el,
8058    expectedType,
8059    cb
8060  ) {
8061    var ref = getTransitionInfo(el, expectedType);
8062    var type = ref.type;
8063    var timeout = ref.timeout;
8064    var propCount = ref.propCount;
8065    if (!type) { return cb() }
8066    var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
8067    var ended = 0;
8068    var end = function () {
8069      el.removeEventListener(event, onEnd);
8070      cb();
8071    };
8072    var onEnd = function (e) {
8073      if (e.target === el) {
8074        if (++ended >= propCount) {
8075          end();
8076        }
8077      }
8078    };
8079    setTimeout(function () {
8080      if (ended < propCount) {
8081        end();
8082      }
8083    }, timeout + 1);
8084    el.addEventListener(event, onEnd);
8085  }
8086
8087  var transformRE = /\b(transform|all)(,|$)/;
8088
8089  function getTransitionInfo (el, expectedType) {
8090    var styles = window.getComputedStyle(el);
8091    // JSDOM may return undefined for transition properties
8092    var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
8093    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
8094    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
8095    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
8096    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
8097    var animationTimeout = getTimeout(animationDelays, animationDurations);
8098
8099    var type;
8100    var timeout = 0;
8101    var propCount = 0;
8102    /* istanbul ignore if */
8103    if (expectedType === TRANSITION) {
8104      if (transitionTimeout > 0) {
8105        type = TRANSITION;
8106        timeout = transitionTimeout;
8107        propCount = transitionDurations.length;
8108      }
8109    } else if (expectedType === ANIMATION) {
8110      if (animationTimeout > 0) {
8111        type = ANIMATION;
8112        timeout = animationTimeout;
8113        propCount = animationDurations.length;
8114      }
8115    } else {
8116      timeout = Math.max(transitionTimeout, animationTimeout);
8117      type = timeout > 0
8118        ? transitionTimeout > animationTimeout
8119          ? TRANSITION
8120          : ANIMATION
8121        : null;
8122      propCount = type
8123        ? type === TRANSITION
8124          ? transitionDurations.length
8125          : animationDurations.length
8126        : 0;
8127    }
8128    var hasTransform =
8129      type === TRANSITION &&
8130      transformRE.test(styles[transitionProp + 'Property']);
8131    return {
8132      type: type,
8133      timeout: timeout,
8134      propCount: propCount,
8135      hasTransform: hasTransform
8136    }
8137  }
8138
8139  function getTimeout (delays, durations) {
8140    /* istanbul ignore next */
8141    while (delays.length < durations.length) {
8142      delays = delays.concat(delays);
8143    }
8144
8145    return Math.max.apply(null, durations.map(function (d, i) {
8146      return toMs(d) + toMs(delays[i])
8147    }))
8148  }
8149
8150  // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
8151  // in a locale-dependent way, using a comma instead of a dot.
8152  // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
8153  // as a floor function) causing unexpected behaviors
8154  function toMs (s) {
8155    return Number(s.slice(0, -1).replace(',', '.')) * 1000
8156  }
8157
8158  /*  */
8159
8160  function enter (vnode, toggleDisplay) {
8161    var el = vnode.elm;
8162
8163    // call leave callback now
8164    if (isDef(el._leaveCb)) {
8165      el._leaveCb.cancelled = true;
8166      el._leaveCb();
8167    }
8168
8169    var data = resolveTransition(vnode.data.transition);
8170    if (isUndef(data)) {
8171      return
8172    }
8173
8174    /* istanbul ignore if */
8175    if (isDef(el._enterCb) || el.nodeType !== 1) {
8176      return
8177    }
8178
8179    var css = data.css;
8180    var type = data.type;
8181    var enterClass = data.enterClass;
8182    var enterToClass = data.enterToClass;
8183    var enterActiveClass = data.enterActiveClass;
8184    var appearClass = data.appearClass;
8185    var appearToClass = data.appearToClass;
8186    var appearActiveClass = data.appearActiveClass;
8187    var beforeEnter = data.beforeEnter;
8188    var enter = data.enter;
8189    var afterEnter = data.afterEnter;
8190    var enterCancelled = data.enterCancelled;
8191    var beforeAppear = data.beforeAppear;
8192    var appear = data.appear;
8193    var afterAppear = data.afterAppear;
8194    var appearCancelled = data.appearCancelled;
8195    var duration = data.duration;
8196
8197    // activeInstance will always be the <transition> component managing this
8198    // transition. One edge case to check is when the <transition> is placed
8199    // as the root node of a child component. In that case we need to check
8200    // <transition>'s parent for appear check.
8201    var context = activeInstance;
8202    var transitionNode = activeInstance.$vnode;
8203    while (transitionNode && transitionNode.parent) {
8204      context = transitionNode.context;
8205      transitionNode = transitionNode.parent;
8206    }
8207
8208    var isAppear = !context._isMounted || !vnode.isRootInsert;
8209
8210    if (isAppear && !appear && appear !== '') {
8211      return
8212    }
8213
8214    var startClass = isAppear && appearClass
8215      ? appearClass
8216      : enterClass;
8217    var activeClass = isAppear && appearActiveClass
8218      ? appearActiveClass
8219      : enterActiveClass;
8220    var toClass = isAppear && appearToClass
8221      ? appearToClass
8222      : enterToClass;
8223
8224    var beforeEnterHook = isAppear
8225      ? (beforeAppear || beforeEnter)
8226      : beforeEnter;
8227    var enterHook = isAppear
8228      ? (typeof appear === 'function' ? appear : enter)
8229      : enter;
8230    var afterEnterHook = isAppear
8231      ? (afterAppear || afterEnter)
8232      : afterEnter;
8233    var enterCancelledHook = isAppear
8234      ? (appearCancelled || enterCancelled)
8235      : enterCancelled;
8236
8237    var explicitEnterDuration = toNumber(
8238      isObject(duration)
8239        ? duration.enter
8240        : duration
8241    );
8242
8243    if (explicitEnterDuration != null) {
8244      checkDuration(explicitEnterDuration, 'enter', vnode);
8245    }
8246
8247    var expectsCSS = css !== false && !isIE9;
8248    var userWantsControl = getHookArgumentsLength(enterHook);
8249
8250    var cb = el._enterCb = once(function () {
8251      if (expectsCSS) {
8252        removeTransitionClass(el, toClass);
8253        removeTransitionClass(el, activeClass);
8254      }
8255      if (cb.cancelled) {
8256        if (expectsCSS) {
8257          removeTransitionClass(el, startClass);
8258        }
8259        enterCancelledHook && enterCancelledHook(el);
8260      } else {
8261        afterEnterHook && afterEnterHook(el);
8262      }
8263      el._enterCb = null;
8264    });
8265
8266    if (!vnode.data.show) {
8267      // remove pending leave element on enter by injecting an insert hook
8268      mergeVNodeHook(vnode, 'insert', function () {
8269        var parent = el.parentNode;
8270        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
8271        if (pendingNode &&
8272          pendingNode.tag === vnode.tag &&
8273          pendingNode.elm._leaveCb
8274        ) {
8275          pendingNode.elm._leaveCb();
8276        }
8277        enterHook && enterHook(el, cb);
8278      });
8279    }
8280
8281    // start enter transition
8282    beforeEnterHook && beforeEnterHook(el);
8283    if (expectsCSS) {
8284      addTransitionClass(el, startClass);
8285      addTransitionClass(el, activeClass);
8286      nextFrame(function () {
8287        removeTransitionClass(el, startClass);
8288        if (!cb.cancelled) {
8289          addTransitionClass(el, toClass);
8290          if (!userWantsControl) {
8291            if (isValidDuration(explicitEnterDuration)) {
8292              setTimeout(cb, explicitEnterDuration);
8293            } else {
8294              whenTransitionEnds(el, type, cb);
8295            }
8296          }
8297        }
8298      });
8299    }
8300
8301    if (vnode.data.show) {
8302      toggleDisplay && toggleDisplay();
8303      enterHook && enterHook(el, cb);
8304    }
8305
8306    if (!expectsCSS && !userWantsControl) {
8307      cb();
8308    }
8309  }
8310
8311  function leave (vnode, rm) {
8312    var el = vnode.elm;
8313
8314    // call enter callback now
8315    if (isDef(el._enterCb)) {
8316      el._enterCb.cancelled = true;
8317      el._enterCb();
8318    }
8319
8320    var data = resolveTransition(vnode.data.transition);
8321    if (isUndef(data) || el.nodeType !== 1) {
8322      return rm()
8323    }
8324
8325    /* istanbul ignore if */
8326    if (isDef(el._leaveCb)) {
8327      return
8328    }
8329
8330    var css = data.css;
8331    var type = data.type;
8332    var leaveClass = data.leaveClass;
8333    var leaveToClass = data.leaveToClass;
8334    var leaveActiveClass = data.leaveActiveClass;
8335    var beforeLeave = data.beforeLeave;
8336    var leave = data.leave;
8337    var afterLeave = data.afterLeave;
8338    var leaveCancelled = data.leaveCancelled;
8339    var delayLeave = data.delayLeave;
8340    var duration = data.duration;
8341
8342    var expectsCSS = css !== false && !isIE9;
8343    var userWantsControl = getHookArgumentsLength(leave);
8344
8345    var explicitLeaveDuration = toNumber(
8346      isObject(duration)
8347        ? duration.leave
8348        : duration
8349    );
8350

8351    if (isDef(explicitLeaveDuration)) {
8352      checkDuration(explicitLeaveDuration, 'leave', vnode);
8353    }
8354
8355    var cb = el._leaveCb = once(function () {
8356      if (el.parentNode && el.parentNode._pending) {
8357        el.parentNode._pending[vnode.key] = null;
8358      }
8359      if (expectsCSS) {
8360        removeTransitionClass(el, leaveToClass);
8361        removeTransitionClass(el, leaveActiveClass);
8362      }
8363      if (cb.cancelled) {
8364        if (expectsCSS) {
8365          removeTransitionClass(el, leaveClass);
8366        }
8367        leaveCancelled && leaveCancelled(el);
8368      } else {
8369        rm();
8370        afterLeave && afterLeave(el);
8371      }
8372      el._leaveCb = null;
8373    });
8374
8375    if (delayLeave) {
8376      delayLeave(performLeave);
8377    } else {
8378      performLeave();
8379    }
8380
8381    function performLeave () {
8382      // the delayed leave may have already been cancelled
8383      if (cb.cancelled) {
8384        return
8385      }
8386      // record leaving element
8387      if (!vnode.data.show && el.parentNode) {
8388        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
8389      }
8390      beforeLeave && beforeLeave(el);
8391      if (expectsCSS) {
8392        addTransitionClass(el, leaveClass);
8393        addTransitionClass(el, leaveActiveClass);
8394        nextFrame(function () {
8395          removeTransitionClass(el, leaveClass);
8396          if (!cb.cancelled) {
8397            addTransitionClass(el, leaveToClass);
8398            if (!userWantsControl) {
8399              if (isValidDuration(explicitLeaveDuration)) {
8400                setTimeout(cb, explicitLeaveDuration);
8401              } else {
8402                whenTransitionEnds(el, type, cb);
8403              }
8404            }
8405          }
8406        });
8407      }
8408      leave && leave(el, cb);
8409      if (!expectsCSS && !userWantsControl) {
8410        cb();
8411      }
8412    }
8413  }
8414
8415  // only used in dev mode
8416  function checkDuration (val, name, vnode) {
8417    if (typeof val !== 'number') {
8418      warn(
8419        "<transition> explicit " + name + " duration is not a valid number - " +
8420        "got " + (JSON.stringify(val)) + ".",
8421        vnode.context
8422      );
8423    } else if (isNaN(val)) {
8424      warn(
8425        "<transition> explicit " + name + " duration is NaN - " +
8426        'the duration expression might be incorrect.',
8427        vnode.context
8428      );
8429    }
8430  }
8431
8432  function isValidDuration (val) {
8433    return typeof val === 'number' && !isNaN(val)
8434  }
8435
8436  /**
8437   * Normalize a transition hook's argument length. The hook may be:
8438   * - a merged hook (invoker) with the original in .fns
8439   * - a wrapped component method (check ._length)
8440   * - a plain function (.length)
8441   */
8442  function getHookArgumentsLength (fn) {
8443    if (isUndef(fn)) {
8444      return false
8445    }
8446    var invokerFns = fn.fns;
8447    if (isDef(invokerFns)) {
8448      // invoker
8449      return getHookArgumentsLength(
8450        Array.isArray(invokerFns)
8451          ? invokerFns[0]
8452          : invokerFns
8453      )
8454    } else {
8455      return (fn._length || fn.length) > 1
8456    }
8457  }
8458
8459  function _enter (_, vnode) {
8460    if (vnode.data.show !== true) {
8461      enter(vnode);
8462    }
8463  }
8464
8465  var transition = inBrowser ? {
8466    create: _enter,
8467    activate: _enter,
8468    remove: function remove$$1 (vnode, rm) {
8469      /* istanbul ignore else */
8470      if (vnode.data.show !== true) {
8471        leave(vnode, rm);
8472      } else {
8473        rm();
8474      }
8475    }
8476  } : {};
8477
8478  var platformModules = [
8479    attrs,
8480    klass,
8481    events,
8482    domProps,
8483    style,
8484    transition
8485  ];
8486
8487  /*  */
8488
8489  // the directive module should be applied last, after all
8490  // built-in modules have been applied.
8491  var modules = platformModules.concat(baseModules);
8492
8493  var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
8494
8495  /**
8496   * Not type checking this file because flow doesn't like attaching
8497   * properties to Elements.
8498   */
8499
8500  /* istanbul ignore if */
8501  if (isIE9) {
8502    // http://www.matts411.com/post/internet-explorer-9-oninput/
8503    document.addEventListener('selectionchange', function () {
8504      var el = document.activeElement;
8505      if (el && el.vmodel) {
8506        trigger(el, 'input');
8507      }
8508    });
8509  }
8510
8511  var directive = {
8512    inserted: function inserted (el, binding, vnode, oldVnode) {
8513      if (vnode.tag === 'select') {
8514        // #6903
8515        if (oldVnode.elm && !oldVnode.elm._vOptions) {
8516          mergeVNodeHook(vnode, 'postpatch', function () {
8517            directive.componentUpdated(el, binding, vnode);
8518          });
8519        } else {
8520          setSelected(el, binding, vnode.context);
8521        }
8522        el._vOptions = [].map.call(el.options, getValue);
8523      } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
8524        el._vModifiers = binding.modifiers;
8525        if (!binding.modifiers.lazy) {
8526          el.addEventListener('compositionstart', onCompositionStart);
8527          el.addEventListener('compositionend', onCompositionEnd);
8528          // Safari < 10.2 & UIWebView doesn't fire compositionend when
8529          // switching focus before confirming composition choice
8530          // this also fixes the issue where some browsers e.g. iOS Chrome
8531          // fires "change" instead of "input" on autocomplete.
8532          el.addEventListener('change', onCompositionEnd);
8533          /* istanbul ignore if */
8534          if (isIE9) {
8535            el.vmodel = true;
8536          }
8537        }
8538      }
8539    },
8540
8541    componentUpdated: function componentUpdated (el, binding, vnode) {
8542      if (vnode.tag === 'select') {
8543        setSelected(el, binding, vnode.context);
8544        // in case the options rendered by v-for have changed,
8545        // it's possible that the value is out-of-sync with the rendered options.
8546        // detect such cases and filter out values that no longer has a matching
8547        // option in the DOM.
8548        var prevOptions = el._vOptions;
8549        var curOptions = el._vOptions = [].map.call(el.options, getValue);
8550        if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
8551          // trigger change event if
8552          // no matching option found for at least one value
8553          var needReset = el.multiple
8554            ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
8555            : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
8556          if (needReset) {
8557            trigger(el, 'change');
8558          }
8559        }
8560      }
8561    }
8562  };
8563
8564  function setSelected (el, binding, vm) {
8565    actuallySetSelected(el, binding, vm);
8566    /* istanbul ignore if */
8567    if (isIE || isEdge) {
8568      setTimeout(function () {
8569        actuallySetSelected(el, binding, vm);
8570      }, 0);
8571    }
8572  }
8573
8574  function actuallySetSelected (el, binding, vm) {
8575    var value = binding.value;
8576    var isMultiple = el.multiple;
8577    if (isMultiple && !Array.isArray(value)) {
8578      warn(
8579        "<select multiple v-model=\"" + (binding.expression) + "\"> " +
8580        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
8581        vm
8582      );
8583      return
8584    }
8585    var selected, option;
8586    for (var i = 0, l = el.options.length; i < l; i++) {
8587      option = el.options[i];
8588      if (isMultiple) {
8589        selected = looseIndexOf(value, getValue(option)) > -1;
8590        if (option.selected !== selected) {
8591          option.selected = selected;
8592        }
8593      } else {
8594        if (looseEqual(getValue(option), value)) {
8595          if (el.selectedIndex !== i) {
8596            el.selectedIndex = i;
8597          }
8598          return
8599        }
8600      }
8601    }
8602    if (!isMultiple) {
8603      el.selectedIndex = -1;
8604    }
8605  }
8606
8607  function hasNoMatchingOption (value, options) {
8608    return options.every(function (o) { return !looseEqual(o, value); })
8609  }
8610
8611  function getValue (option) {
8612    return '_value' in option
8613      ? option._value
8614      : option.value
8615  }
8616
8617  function onCompositionStart (e) {
8618    e.target.composing = true;
8619  }
8620
8621  function onCompositionEnd (e) {
8622    // prevent triggering an input event for no reason
8623    if (!e.target.composing) { return }
8624    e.target.composing = false;

8625    trigger(e.target, 'input');
8626  }
8627
8628  function trigger (el, type) {
8629    var e = document.createEvent('HTMLEvents');
8630    e.initEvent(type, true, true);
8631    el.dispatchEvent(e);
8632  }
8633
8634  /*  */
8635
8636  // recursively search for possible transition defined inside the component root
8637  function locateNode (vnode) {
8638    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
8639      ? locateNode(vnode.componentInstance._vnode)
8640      : vnode
8641  }
8642
8643  var show = {
8644    bind: function bind (el, ref, vnode) {
8645      var value = ref.value;
8646
8647      vnode = locateNode(vnode);
8648      var transition$$1 = vnode.data && vnode.data.transition;
8649      var originalDisplay = el.__vOriginalDisplay =
8650        el.style.display === 'none' ? '' : el.style.display;
8651      if (value && transition$$1) {
8652        vnode.data.show = true;
8653        enter(vnode, function () {
8654          el.style.display = originalDisplay;
8655        });
8656      } else {
8657        el.style.display = value ? originalDisplay : 'none';
8658      }
8659    },
8660
8661    update: function update (el, ref, vnode) {
8662      var value = ref.value;
8663      var oldValue = ref.oldValue;
8664
8665      /* istanbul ignore if */
8666      if (!value === !oldValue) { return }
8667      vnode = locateNode(vnode);
8668      var transition$$1 = vnode.data && vnode.data.transition;
8669      if (transition$$1) {
8670        vnode.data.show = true;
8671        if (value) {
8672          enter(vnode, function () {
8673            el.style.display = el.__vOriginalDisplay;
8674          });
8675        } else {
8676          leave(vnode, function () {
8677            el.style.display = 'none';
8678          });
8679        }
8680      } else {
8681        el.style.display = value ? el.__vOriginalDisplay : 'none';
8682      }
8683    },
8684
8685    unbind: function unbind (
8686      el,
8687      binding,
8688      vnode,
8689      oldVnode,
8690      isDestroy
8691    ) {
8692      if (!isDestroy) {
8693        el.style.display = el.__vOriginalDisplay;
8694      }
8695    }
8696  };
8697
8698  var platformDirectives = {
8699    model: directive,
8700    show: show
8701  };
8702
8703  /*  */
8704
8705  var transitionProps = {
8706    name: String,
8707    appear: Boolean,
8708    css: Boolean,
8709    mode: String,
8710    type: String,
8711    enterClass: String,
8712    leaveClass: String,
8713    enterToClass: String,
8714    leaveToClass: String,
8715    enterActiveClass: String,
8716    leaveActiveClass: String,
8717    appearClass: String,
8718    appearActiveClass: String,
8719    appearToClass: String,
8720    duration: [Number, String, Object]
8721  };
8722
8723  // in case the child is also an abstract component, e.g. <keep-alive>
8724  // we want to recursively retrieve the real component to be rendered
8725  function getRealChild (vnode) {
8726    var compOptions = vnode && vnode.componentOptions;
8727    if (compOptions && compOptions.Ctor.options.abstract) {
8728      return getRealChild(getFirstComponentChild(compOptions.children))
8729    } else {
8730      return vnode
8731    }
8732  }
8733
8734  function extractTransitionData (comp) {
8735    var data = {};
8736    var options = comp.$options;
8737    // props
8738    for (var key in options.propsData) {
8739      data[key] = comp[key];
8740    }
8741    // events.
8742    // extract listeners and pass them directly to the transition methods
8743    var listeners = options._parentListeners;
8744    for (var key$1 in listeners) {
8745      data[camelize(key$1)] = listeners[key$1];
8746    }
8747    return data
8748  }
8749
8750  function placeholder (h, rawChild) {
8751    if (/\d-keep-alive$/.test(rawChild.tag)) {
8752      return h('keep-alive', {
8753        props: rawChild.componentOptions.propsData
8754      })
8755    }
8756  }
8757
8758  function hasParentTransition (vnode) {
8759    while ((vnode = vnode.parent)) {
8760      if (vnode.data.transition) {
8761        return true
8762      }
8763    }
8764  }
8765
8766  function isSameChild (child, oldChild) {
8767    return oldChild.key === child.key && oldChild.tag === child.tag
8768  }
8769
8770  var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
8771
8772  var isVShowDirective = function (d) { return d.name === 'show'; };
8773
8774  var Transition = {
8775    name: 'transition',
8776    props: transitionProps,
8777    abstract: true,
8778
8779    render: function render (h) {
8780      var this$1 = this;
8781
8782      var children = this.$slots.default;
8783      if (!children) {
8784        return
8785      }
8786

8787      // filter out text nodes (possible whitespaces)
8788      children = children.filter(isNotTextNode);
8789      /* istanbul ignore if */
8790      if (!children.length) {
8791        return
8792      }
8793
8794      // warn multiple elements
8795      if (children.length > 1) {
8796        warn(
8797          '<transition> can only be used on a single element. Use ' +
8798          '<transition-group> for lists.',
8799          this.$parent
8800        );
8801      }
8802
8803      var mode = this.mode;
8804
8805      // warn invalid mode
8806      if (mode && mode !== 'in-out' && mode !== 'out-in'
8807      ) {
8808        warn(
8809          'invalid <transition> mode: ' + mode,
8810          this.$parent
8811        );
8812      }
8813
8814      var rawChild = children[0];
8815
8816      // if this is a component root node and the component's
8817      // parent container node also has transition, skip.
8818      if (hasParentTransition(this.$vnode)) {
8819        return rawChild
8820      }
8821
8822      // apply transition data to child
8823      // use getRealChild() to ignore abstract components e.g. keep-alive
8824      var child = getRealChild(rawChild);
8825      /* istanbul ignore if */
8826      if (!child) {
8827        return rawChild
8828      }
8829
8830      if (this._leaving) {
8831        return placeholder(h, rawChild)
8832      }
8833
8834      // ensure a key that is unique to the vnode type and to this transition
8835      // component instance. This key will be used to remove pending leaving nodes
8836      // during entering.
8837      var id = "__transition-" + (this._uid) + "-";
8838      child.key = child.key == null
8839        ? child.isComment
8840          ? id + 'comment'
8841          : id + child.tag
8842        : isPrimitive(child.key)
8843          ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
8844          : child.key;
8845
8846      var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
8847      var oldRawChild = this._vnode;
8848      var oldChild = getRealChild(oldRawChild);
8849
8850      // mark v-show
8851      // so that the transition module can hand over the control to the directive
8852      if (child.data.directives && child.data.directives.some(isVShowDirective)) {
8853        child.data.show = true;
8854      }
8855
8856      if (
8857        oldChild &&
8858        oldChild.data &&
8859        !isSameChild(child, oldChild) &&
8860        !isAsyncPlaceholder(oldChild) &&
8861        // #6687 component root is a comment node
8862        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
8863      ) {
8864        // replace old child transition data with fresh one
8865        // important for dynamic transitions!
8866        var oldData = oldChild.data.transition = extend({}, data);
8867        // handle transition mode
8868        if (mode === 'out-in') {
8869          // return placeholder node and queue update when leave finishes
8870          this._leaving = true;
8871          mergeVNodeHook(oldData, 'afterLeave', function () {
8872            this$1._leaving = false;
8873            this$1.$forceUpdate();
8874          });
8875          return placeholder(h, rawChild)
8876        } else if (mode === 'in-out') {
8877          if (isAsyncPlaceholder(child)) {
8878            return oldRawChild
8879          }
8880          var delayedLeave;
8881          var performLeave = function () { delayedLeave(); };
8882          mergeVNodeHook(data, 'afterEnter', performLeave);
8883          mergeVNodeHook(data, 'enterCancelled', performLeave);
8884          mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
8885        }
8886      }
8887
8888      return rawChild
8889    }
8890  };
8891
8892  /*  */
8893
8894  var props = extend({
8895    tag: String,
8896    moveClass: String
8897  }, transitionProps);
8898
8899  delete props.mode;
8900
8901  var TransitionGroup = {
8902    props: props,
8903
8904    beforeMount: function beforeMount () {
8905      var this$1 = this;
8906
8907      var update = this._update;
8908      this._update = function (vnode, hydrating) {
8909        var restoreActiveInstance = setActiveInstance(this$1);
8910        // force removing pass
8911        this$1.__patch__(
8912          this$1._vnode,
8913          this$1.kept,
8914          false, // hydrating
8915          true // removeOnly (!important, avoids unnecessary moves)
8916        );
8917        this$1._vnode = this$1.kept;
8918        restoreActiveInstance();
8919        update.call(this$1, vnode, hydrating);
8920      };
8921    },
8922
8923    render: function render (h) {
8924      var tag = this.tag || this.$vnode.data.tag || 'span';
8925      var map = Object.create(null);
8926      var prevChildren = this.prevChildren = this.children;
8927      var rawChildren = this.$slots.default || [];
8928      var children = this.children = [];
8929      var transitionData = extractTransitionData(this);
8930
8931      for (var i = 0; i < rawChildren.length; i++) {
8932        var c = rawChildren[i];
8933        if (c.tag) {
8934          if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
8935            children.push(c);
8936            map[c.key] = c
8937            ;(c.data || (c.data = {})).transition = transitionData;
8938          } else {

8939            var opts = c.componentOptions;
8940            var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
8941            warn(("<transition-group> children must be keyed: <" + name + ">"));
8942          }
8943        }
8944      }
8945
8946      if (prevChildren) {
8947        var kept = [];
8948        var removed = [];
8949        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
8950          var c$1 = prevChildren[i$1];
8951          c$1.data.transition = transitionData;
8952          c$1.data.pos = c$1.elm.getBoundingClientRect();
8953          if (map[c$1.key]) {
8954            kept.push(c$1);
8955          } else {
8956            removed.push(c$1);
8957          }
8958        }
8959        this.kept = h(tag, null, kept);
8960        this.removed = removed;
8961      }
8962
8963      return h(tag, null, children)
8964    },
8965
8966    updated: function updated () {
8967      var children = this.prevChildren;
8968      var moveClass = this.moveClass || ((this.name || 'v') + '-move');
8969      if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
8970        return
8971      }
8972
8973      // we divide the work into three loops to avoid mixing DOM reads and writes
8974      // in each iteration - which helps prevent layout thrashing.
8975      children.forEach(callPendingCbs);
8976      children.forEach(recordPosition);
8977      children.forEach(applyTranslation);
8978
8979      // force reflow to put everything in position
8980      // assign to this to avoid being removed in tree-shaking
8981      // $flow-disable-line
8982      this._reflow = document.body.offsetHeight;
8983
8984      children.forEach(function (c) {
8985        if (c.data.moved) {
8986          var el = c.elm;
8987          var s = el.style;
8988          addTransitionClass(el, moveClass);
8989          s.transform = s.WebkitTransform = s.transitionDuration = '';
8990          el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
8991            if (e && e.target !== el) {
8992              return
8993            }
8994            if (!e || /transform$/.test(e.propertyName)) {
8995              el.removeEventListener(transitionEndEvent, cb);
8996              el._moveCb = null;
8997              removeTransitionClass(el, moveClass);
8998            }
8999          });
9000        }
9001      });
9002    },
9003
9004    methods: {
9005      hasMove: function hasMove (el, moveClass) {
9006        /* istanbul ignore if */
9007        if (!hasTransition) {
9008          return false
9009        }
9010        /* istanbul ignore if */
9011        if (this._hasMove) {
9012          return this._hasMove
9013        }
9014        // Detect whether an element with the move class applied has
9015        // CSS transitions. Since the element may be inside an entering
9016        // transition at this very moment, we make a clone of it and remove
9017        // all other transition classes applied to ensure only the move class
9018        // is applied.
9019        var clone = el.cloneNode();
9020        if (el._transitionClasses) {
9021          el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
9022        }
9023        addClass(clone, moveClass);
9024        clone.style.display = 'none';
9025        this.$el.appendChild(clone);
9026        var info = getTransitionInfo(clone);
9027        this.$el.removeChild(clone);
9028        return (this._hasMove = info.hasTransform)
9029      }
9030    }
9031  };
9032
9033  function callPendingCbs (c) {
9034    /* istanbul ignore if */
9035    if (c.elm._moveCb) {
9036      c.elm._moveCb();
9037    }
9038    /* istanbul ignore if */
9039    if (c.elm._enterCb) {
9040      c.elm._enterCb();
9041    }
9042  }
9043
9044  function recordPosition (c) {
9045    c.data.newPos = c.elm.getBoundingClientRect();
9046  }
9047
9048  function applyTranslation (c) {
9049    var oldPos = c.data.pos;
9050    var newPos = c.data.newPos;
9051    var dx = oldPos.left - newPos.left;
9052    var dy = oldPos.top - newPos.top;
9053    if (dx || dy) {
9054      c.data.moved = true;
9055      var s = c.elm.style;
9056      s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
9057      s.transitionDuration = '0s';
9058    }
9059  }
9060
9061  var platformComponents = {
9062    Transition: Transition,
9063    TransitionGroup: TransitionGroup
9064  };
9065
9066  /*  */
9067
9068  // install platform specific utils
9069  Vue.config.mustUseProp = mustUseProp;
9070  Vue.config.isReservedTag = isReservedTag;
9071  Vue.config.isReservedAttr = isReservedAttr;
9072  Vue.config.getTagNamespace = getTagNamespace;
9073  Vue.config.isUnknownElement = isUnknownElement;
9074
9075  // install platform runtime directives & components
9076  extend(Vue.options.directives, platformDirectives);
9077  extend(Vue.options.components, platformComponents);
9078
9079  // install platform patch function
9080  Vue.prototype.__patch__ = inBrowser ? patch : noop;
9081
9082  // public mount method
9083  Vue.prototype.$mount = function (
9084    el,
9085    hydrating
9086  ) {
9087    el = el && inBrowser ? query(el) : undefined;
9088    return mountComponent(this, el, hydrating)
9089  };
9090
9091  // devtools global hook
9092  /* istanbul ignore next */
9093  if (inBrowser) {
9094    setTimeout(function () {
9095      if (config.devtools) {
9096        if (devtools) {
9097          devtools.emit('init', Vue);
9098        } else {
9099          console[console.info ? 'info' : 'log'](
9100            'Download the Vue Devtools extension for a better development experience:\n' +
9101            'https://github.com/vuejs/vue-devtools'
9102          );
9103        }
9104      }
9105      if (config.productionTip !== false &&
9106        typeof console !== 'undefined'
9107      ) {
9108        console[console.info ? 'info' : 'log'](
9109          "You are running Vue in development mode.\n" +
9110          "Make sure to turn on production mode when deploying for production.\n" +
9111          "See more tips at https://vuejs.org/guide/deployment.html"
9112        );
9113      }
9114    }, 0);
9115  }
9116
9117  /*  */
9118
9119  var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
9120  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
9121
9122  var buildRegex = cached(function (delimiters) {
9123    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
9124    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
9125    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
9126  });
9127
9128
9129
9130  function parseText (
9131    text,
9132    delimiters
9133  ) {
9134    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
9135    if (!tagRE.test(text)) {
9136      return
9137    }
9138    var tokens = [];
9139    var rawTokens = [];
9140    var lastIndex = tagRE.lastIndex = 0;
9141    var match, index, tokenValue;
9142    while ((match = tagRE.exec(text))) {
9143      index = match.index;
9144      // push text token
9145      if (index > lastIndex) {
9146        rawTokens.push(tokenValue = text.slice(lastIndex, index));
9147        tokens.push(JSON.stringify(tokenValue));
9148      }
9149      // tag token
9150      var exp = parseFilters(match[1].trim());
9151      tokens.push(("_s(" + exp + ")"));
9152      rawTokens.push({ '@binding': exp });
9153      lastIndex = index + match[0].length;
9154    }
9155    if (lastIndex < text.length) {
9156      rawTokens.push(tokenValue = text.slice(lastIndex));
9157      tokens.push(JSON.stringify(tokenValue));
9158    }
9159    return {
9160      expression: tokens.join('+'),
9161      tokens: rawTokens
9162    }
9163  }
9164
9165  /*  */
9166
9167  function transformNode (el, options) {
9168    var warn = options.warn || baseWarn;
9169    var staticClass = getAndRemoveAttr(el, 'class');
9170    if (staticClass) {
9171      var res = parseText(staticClass, options.delimiters);
9172      if (res) {
9173        warn(
9174          "class=\"" + staticClass + "\": " +
9175          'Interpolation inside attributes has been removed. ' +
9176          'Use v-bind or the colon shorthand instead. For example, ' +
9177          'instead of <div class="{{ val }}">, use <div :class="val">.',
9178          el.rawAttrsMap['class']
9179        );
9180      }
9181    }
9182    if (staticClass) {
9183      el.staticClass = JSON.stringify(staticClass);
9184    }
9185    var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
9186    if (classBinding) {
9187      el.classBinding = classBinding;
9188    }
9189  }
9190
9191  function genData (el) {
9192    var data = '';
9193    if (el.staticClass) {
9194      data += "staticClass:" + (el.staticClass) + ",";
9195    }
9196    if (el.classBinding) {
9197      data += "class:" + (el.classBinding) + ",";
9198    }
9199    return data
9200  }
9201
9202  var klass$1 = {
9203    staticKeys: ['staticClass'],
9204    transformNode: transformNode,
9205    genData: genData
9206  };
9207
9208  /*  */
9209
9210  function transformNode$1 (el, options) {
9211    var warn = options.warn || baseWarn;
9212    var staticStyle = getAndRemoveAttr(el, 'style');
9213    if (staticStyle) {
9214      /* istanbul ignore if */
9215      {
9216        var res = parseText(staticStyle, options.delimiters);
9217        if (res) {
9218          warn(
9219            "style=\"" + staticStyle + "\": " +
9220            'Interpolation inside attributes has been removed. ' +
9221            'Use v-bind or the colon shorthand instead. For example, ' +
9222            'instead of <div style="{{ val }}">, use <div :style="val">.',
9223            el.rawAttrsMap['style']
9224          );
9225        }
9226      }
9227      el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
9228    }
9229
9230    var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
9231    if (styleBinding) {
9232      el.styleBinding = styleBinding;
9233    }
9234  }
9235
9236  function genData$1 (el) {
9237    var data = '';
9238    if (el.staticStyle) {
9239      data += "staticStyle:" + (el.staticStyle) + ",";
9240    }
9241    if (el.styleBinding) {
9242      data += "style:(" + (el.styleBinding) + "),";
9243    }
9244    return data
9245  }
9246
9247  var style$1 = {
9248    staticKeys: ['staticStyle'],
9249    transformNode: transformNode$1,
9250    genData: genData$1
9251  };
9252
9253  /*  */
9254
9255  var decoder;
9256
9257  var he = {
9258    decode: function decode (html) {
9259      decoder = decoder || document.createElement('div');
9260      decoder.innerHTML = html;
9261      return decoder.textContent
9262    }
9263  };
9264
9265  /*  */
9266
9267  var isUnaryTag = makeMap(
9268    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
9269    'link,meta,param,source,track,wbr'
9270  );
9271
9272  // Elements that you can, intentionally, leave open
9273  // (and which close themselves)
9274  var canBeLeftOpenTag = makeMap(
9275    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
9276  );
9277
9278  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
9279  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
9280  var isNonPhrasingTag = makeMap(
9281    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
9282    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
9283    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
9284    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
9285    'title,tr,track'
9286  );
9287
9288  /**
9289   * Not type-checking this file because it's mostly vendor code.
9290   */
9291
9292  // Regular Expressions for parsing tags and attributes
9293  var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
9294  var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
9295  var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
9296  var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
9297  var startTagOpen = new RegExp(("^<" + qnameCapture));
9298  var startTagClose = /^\s*(\/?)>/;
9299  var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
9300  var doctype = /^<!DOCTYPE [^>]+>/i;
9301  // #7298: escape - to avoid being passed as HTML comment when inlined in page
9302  var comment = /^<!\--/;
9303  var conditionalComment = /^<!\[/;
9304
9305  // Special Elements (can contain anything)
9306  var isPlainTextElement = makeMap('script,style,textarea', true);
9307  var reCache = {};
9308
9309  var decodingMap = {
9310    '&lt;': '<',
9311    '&gt;': '>',
9312    '&quot;': '"',
9313    '&amp;': '&',
9314    '&#10;': '\n',
9315    '&#9;': '\t',
9316    '&#39;': "'"
9317  };
9318  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
9319  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
9320
9321  // #5992
9322  var isIgnoreNewlineTag = makeMap('pre,textarea', true);
9323  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
9324
9325  function decodeAttr (value, shouldDecodeNewlines) {
9326    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
9327    return value.replace(re, function (match) { return decodingMap[match]; })
9328  }
9329
9330  function parseHTML (html, options) {
9331    var stack = [];

9332    var expectHTML = options.expectHTML;
9333    var isUnaryTag$$1 = options.isUnaryTag || no;
9334    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
9335    var index = 0;
9336    var last, lastTag;
9337    while (html) {
9338      last = html;
9339      // Make sure we're not in a plaintext content element like script/style
9340      if (!lastTag || !isPlainTextElement(lastTag)) {
9341        var textEnd = html.indexOf('<');
9342        if (textEnd === 0) {
9343          // Comment:
9344          if (comment.test(html)) {
9345            var commentEnd = html.indexOf('-->');
9346
9347            if (commentEnd >= 0) {
9348              if (options.shouldKeepComment) {
9349                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
9350              }
9351              advance(commentEnd + 3);
9352              continue
9353            }
9354          }
9355
9356          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
9357          if (conditionalComment.test(html)) {
9358            var conditionalEnd = html.indexOf(']>');
9359
9360            if (conditionalEnd >= 0) {
9361              advance(conditionalEnd + 2);
9362              continue
9363            }
9364          }
9365
9366          // Doctype:
9367          var doctypeMatch = html.match(doctype);
9368          if (doctypeMatch) {
9369            advance(doctypeMatch[0].length);
9370            continue
9371          }
9372
9373          // End tag:
9374          var endTagMatch = html.match(endTag);
9375          if (endTagMatch) {
9376            var curIndex = index;
9377            advance(endTagMatch[0].length);
9378            parseEndTag(endTagMatch[1], curIndex, index);
9379            continue
9380          }
9381
9382          // Start tag:
9383          var startTagMatch = parseStartTag();
9384          if (startTagMatch) {
9385            handleStartTag(startTagMatch);
9386            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
9387              advance(1);
9388            }
9389            continue
9390          }
9391        }
9392
9393        var text = (void 0), rest = (void 0), next = (void 0);
9394        if (textEnd >= 0) {
9395          rest = html.slice(textEnd);
9396          while (
9397            !endTag.test(rest) &&
9398            !startTagOpen.test(rest) &&
9399            !comment.test(rest) &&
9400            !conditionalComment.test(rest)
9401          ) {
9402            // < in plain text, be forgiving and treat it as text
9403            next = rest.indexOf('<', 1);
9404            if (next < 0) { break }
9405            textEnd += next;
9406            rest = html.slice(textEnd);
9407          }
9408          text = html.substring(0, textEnd);
9409        }
9410
9411        if (textEnd < 0) {
9412          text = html;
9413        }
9414
9415        if (text) {
9416          advance(text.length);
9417        }
9418
9419        if (options.chars && text) {
9420          options.chars(text, index - text.length, index);
9421        }
9422      } else {
9423        var endTagLength = 0;
9424        var stackedTag = lastTag.toLowerCase();
9425        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
9426        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
9427          endTagLength = endTag.length;
9428          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
9429            text = text
9430              .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
9431              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
9432          }
9433          if (shouldIgnoreFirstNewline(stackedTag, text)) {
9434            text = text.slice(1);
9435          }
9436          if (options.chars) {
9437            options.chars(text);
9438          }
9439          return ''
9440        });
9441        index += html.length - rest$1.length;
9442        html = rest$1;
9443        parseEndTag(stackedTag, index - endTagLength, index);
9444      }
9445
9446      if (html === last) {
9447        options.chars && options.chars(html);
9448        if (!stack.length && options.warn) {
9449          options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
9450        }
9451        break
9452      }
9453    }
9454
9455    // Clean up any remaining tags
9456    parseEndTag();
9457
9458    function advance (n) {
9459      index += n;
9460      html = html.substring(n);
9461    }
9462
9463    function parseStartTag () {
9464      var start = html.match(startTagOpen);
9465      if (start) {
9466        var match = {
9467          tagName: start[1],
9468          attrs: [],
9469          start: index
9470        };
9471        advance(start[0].length);
9472        var end, attr;
9473        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
9474          attr.start = index;
9475          advance(attr[0].length);
9476          attr.end = index;
9477          match.attrs.push(attr);
9478        }
9479        if (end) {
9480          match.unarySlash = end[1];
9481          advance(end[0].length);
9482          match.end = index;
9483          return match
9484        }
9485      }
9486    }
9487
9488    function handleStartTag (match) {
9489      var tagName = match.tagName;
9490      var unarySlash = match.unarySlash;
9491
9492      if (expectHTML) {
9493        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
9494          parseEndTag(lastTag);
9495        }
9496        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
9497          parseEndTag(tagName);
9498        }
9499      }
9500
9501      var unary = isUnaryTag$$1(tagName) || !!unarySlash;
9502
9503      var l = match.attrs.length;
9504      var attrs = new Array(l);
9505      for (var i = 0; i < l; i++) {
9506        var args = match.attrs[i];
9507        var value = args[3] || args[4] || args[5] || '';
9508        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
9509          ? options.shouldDecodeNewlinesForHref
9510          : options.shouldDecodeNewlines;
9511        attrs[i] = {
9512          name: args[1],
9513          value: decodeAttr(value, shouldDecodeNewlines)
9514        };
9515        if (options.outputSourceRange) {
9516          attrs[i].start = args.start + args[0].match(/^\s*/).length;
9517          attrs[i].end = args.end;
9518        }
9519      }
9520
9521      if (!unary) {
9522        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
9523        lastTag = tagName;
9524      }
9525
9526      if (options.start) {
9527        options.start(tagName, attrs, unary, match.start, match.end);
9528      }
9529    }
9530
9531    function parseEndTag (tagName, start, end) {
9532      var pos, lowerCasedTagName;
9533      if (start == null) { start = index; }
9534      if (end == null) { end = index; }
9535
9536      // Find the closest opened tag of the same type
9537      if (tagName) {
9538        lowerCasedTagName = tagName.toLowerCase();
9539        for (pos = stack.length - 1; pos >= 0; pos--) {
9540          if (stack[pos].lowerCasedTag === lowerCasedTagName) {
9541            break
9542          }
9543        }
9544      } else {
9545        // If no tag name is provided, clean shop
9546        pos = 0;
9547      }
9548
9549      if (pos >= 0) {
9550        // Close all the open elements, up the stack
9551        for (var i = stack.length - 1; i >= pos; i--) {
9552          if (i > pos || !tagName &&
9553            options.warn
9554          ) {
9555            options.warn(
9556              ("tag <" + (stack[i].tag) + "> has no matching end tag."),
9557              { start: stack[i].start, end: stack[i].end }
9558            );
9559          }
9560          if (options.end) {
9561            options.end(stack[i].tag, start, end);
9562          }
9563        }
9564
9565        // Remove the open elements from the stack
9566        stack.length = pos;
9567        lastTag = pos && stack[pos - 1].tag;
9568      } else if (lowerCasedTagName === 'br') {
9569        if (options.start) {
9570          options.start(tagName, [], true, start, end);
9571        }
9572      } else if (lowerCasedTagName === 'p') {
9573        if (options.start) {
9574          options.start(tagName, [], false, start, end);
9575        }
9576        if (options.end) {
9577          options.end(tagName, start, end);
9578        }
9579      }
9580    }
9581  }
9582
9583  /*  */
9584
9585  var onRE = /^@|^v-on:/;
9586  var dirRE = /^v-|^@|^:|^#/;
9587  var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
9588  var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
9589  var stripParensRE = /^\(|\)$/g;
9590  var dynamicArgRE = /^\[.*\]$/;
9591
9592  var argRE = /:(.*)$/;
9593  var bindRE = /^:|^\.|^v-bind:/;
9594  var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
9595
9596  var slotRE = /^v-slot(:|$)|^#/;
9597
9598  var lineBreakRE = /[\r\n]/;
9599  var whitespaceRE$1 = /[ \f\t\r\n]+/g;
9600
9601  var invalidAttributeRE = /[\s"'<>\/=]/;
9602

9603  var decodeHTMLCached = cached(he.decode);
9604
9605  var emptySlotScopeToken = "_empty_";
9606
9607  // configurable state
9608  var warn$2;
9609  var delimiters;
9610  var transforms;
9611  var preTransforms;
9612  var postTransforms;
9613  var platformIsPreTag;
9614  var platformMustUseProp;
9615  var platformGetTagNamespace;
9616  var maybeComponent;
9617
9618  function createASTElement (
9619    tag,
9620    attrs,
9621    parent
9622  ) {
9623    return {
9624      type: 1,
9625      tag: tag,
9626      attrsList: attrs,
9627      attrsMap: makeAttrsMap(attrs),
9628      rawAttrsMap: {},
9629      parent: parent,
9630      children: []
9631    }
9632  }
9633
9634  /**
9635   * Convert HTML string to AST.
9636   */
9637  function parse (
9638    template,
9639    options
9640  ) {
9641    warn$2 = options.warn || baseWarn;
9642
9643    platformIsPreTag = options.isPreTag || no;
9644    platformMustUseProp = options.mustUseProp || no;
9645    platformGetTagNamespace = options.getTagNamespace || no;
9646    var isReservedTag = options.isReservedTag || no;
9647    maybeComponent = function (el) { return !!(
9648      el.component ||
9649      el.attrsMap[':is'] ||
9650      el.attrsMap['v-bind:is'] ||
9651      !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
9652    ); };
9653    transforms = pluckModuleFunction(options.modules, 'transformNode');
9654    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
9655    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
9656
9657    delimiters = options.delimiters;
9658
9659    var stack = [];
9660    var preserveWhitespace = options.preserveWhitespace !== false;
9661    var whitespaceOption = options.whitespace;
9662    var root;
9663    var currentParent;
9664    var inVPre = false;
9665    var inPre = false;
9666    var warned = false;
9667
9668    function warnOnce (msg, range) {
9669      if (!warned) {
9670        warned = true;
9671        warn$2(msg, range);
9672      }
9673    }
9674
9675    function closeElement (element) {
9676      trimEndingWhitespace(element);
9677      if (!inVPre && !element.processed) {
9678        element = processElement(element, options);
9679      }
9680      // tree management
9681      if (!stack.length && element !== root) {
9682        // allow root elements with v-if, v-else-if and v-else
9683        if (root.if && (element.elseif || element.else)) {
9684          {
9685            checkRootConstraints(element);
9686          }
9687          addIfCondition(root, {
9688            exp: element.elseif,
9689            block: element
9690          });
9691        } else {
9692          warnOnce(
9693            "Component template should contain exactly one root element. " +
9694            "If you are using v-if on multiple elements, " +
9695            "use v-else-if to chain them instead.",
9696            { start: element.start }
9697          );
9698        }
9699      }
9700      if (currentParent && !element.forbidden) {
9701        if (element.elseif || element.else) {
9702          processIfConditions(element, currentParent);
9703        } else {
9704          if (element.slotScope) {
9705            // scoped slot
9706            // keep it in the children list so that v-else(-if) conditions can
9707            // find it as the prev node.
9708            var name = element.slotTarget || '"default"'
9709            ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
9710          }
9711          currentParent.children.push(element);
9712          element.parent = currentParent;
9713        }
9714      }
9715
9716      // final children cleanup
9717      // filter out scoped slots
9718      element.children = element.children.filter(function (c) { return !(c).slotScope; });
9719      // remove trailing whitespace node again
9720      trimEndingWhitespace(element);
9721
9722      // check pre state
9723      if (element.pre) {
9724        inVPre = false;
9725      }
9726      if (platformIsPreTag(element.tag)) {
9727        inPre = false;
9728      }
9729      // apply post-transforms
9730      for (var i = 0; i < postTransforms.length; i++) {
9731        postTransforms[i](element, options);
9732      }
9733    }
9734
9735    function trimEndingWhitespace (el) {
9736      // remove trailing whitespace node
9737      if (!inPre) {
9738        var lastNode;
9739        while (
9740          (lastNode = el.children[el.children.length - 1]) &&
9741          lastNode.type === 3 &&
9742          lastNode.text === ' '
9743        ) {
9744          el.children.pop();
9745        }
9746      }
9747    }
9748
9749    function checkRootConstraints (el) {
9750      if (el.tag === 'slot' || el.tag === 'template') {
9751        warnOnce(
9752          "Cannot use <" + (el.tag) + "> as component root element because it may " +
9753          'contain multiple nodes.',
9754          { start: el.start }
9755        );
9756      }
9757      if (el.attrsMap.hasOwnProperty('v-for')) {
9758        warnOnce(
9759          'Cannot use v-for on stateful component root element because ' +
9760          'it renders multiple elements.',
9761          el.rawAttrsMap['v-for']
9762        );
9763      }
9764    }
9765
9766    parseHTML(template, {
9767      warn: warn$2,
9768      expectHTML: options.expectHTML,
9769      isUnaryTag: options.isUnaryTag,
9770      canBeLeftOpenTag: options.canBeLeftOpenTag,
9771      shouldDecodeNewlines: options.shouldDecodeNewlines,
9772      shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
9773      shouldKeepComment: options.comments,
9774      outputSourceRange: options.outputSourceRange,
9775      start: function start (tag, attrs, unary, start$1, end) {
9776        // check namespace.
9777        // inherit parent ns if there is one
9778        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
9779
9780        // handle IE svg bug
9781        /* istanbul ignore if */
9782        if (isIE && ns === 'svg') {
9783          attrs = guardIESVGBug(attrs);
9784        }
9785
9786        var element = createASTElement(tag, attrs, currentParent);
9787        if (ns) {
9788          element.ns = ns;
9789        }
9790
9791        {
9792          if (options.outputSourceRange) {
9793            element.start = start$1;
9794            element.end = end;
9795            element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
9796              cumulated[attr.name] = attr;
9797              return cumulated
9798            }, {});
9799          }

9800          attrs.forEach(function (attr) {
9801            if (invalidAttributeRE.test(attr.name)) {
9802              warn$2(
9803                "Invalid dynamic argument expression: attribute names cannot contain " +
9804                "spaces, quotes, <, >, / or =.",
9805                {
9806                  start: attr.start + attr.name.indexOf("["),
9807                  end: attr.start + attr.name.length
9808                }
9809              );
9810            }
9811          });
9812        }
9813
9814        if (isForbiddenTag(element) && !isServerRendering()) {
9815          element.forbidden = true;
9816          warn$2(
9817            'Templates should only be responsible for mapping the state to the ' +
9818            'UI. Avoid placing tags with side-effects in your templates, such as ' +
9819            "<" + tag + ">" + ', as they will not be parsed.',
9820            { start: element.start }
9821          );
9822        }
9823
9824        // apply pre-transforms
9825        for (var i = 0; i < preTransforms.length; i++) {
9826          element = preTransforms[i](element, options) || element;
9827        }
9828
9829        if (!inVPre) {
9830          processPre(element);
9831          if (element.pre) {
9832            inVPre = true;
9833          }
9834        }
9835        if (platformIsPreTag(element.tag)) {
9836          inPre = true;
9837        }
9838        if (inVPre) {
9839          processRawAttrs(element);
9840        } else if (!element.processed) {
9841          // structural directives
9842          processFor(element);
9843          processIf(element);
9844          processOnce(element);
9845        }
9846
9847        if (!root) {
9848          root = element;
9849          {
9850            checkRootConstraints(root);
9851          }
9852        }
9853
9854        if (!unary) {
9855          currentParent = element;
9856          stack.push(element);
9857        } else {
9858          closeElement(element);
9859        }
9860      },
9861
9862      end: function end (tag, start, end$1) {
9863        var element = stack[stack.length - 1];
9864        // pop stack
9865        stack.length -= 1;
9866        currentParent = stack[stack.length - 1];
9867        if (options.outputSourceRange) {
9868          element.end = end$1;
9869        }
9870        closeElement(element);
9871      },
9872
9873      chars: function chars (text, start, end) {
9874        if (!currentParent) {
9875          {
9876            if (text === template) {
9877              warnOnce(
9878                'Component template requires a root element, rather than just text.',
9879                { start: start }
9880              );
9881            } else if ((text = text.trim())) {
9882              warnOnce(
9883                ("text \"" + text + "\" outside root element will be ignored."),
9884                { start: start }
9885              );
9886            }
9887          }
9888          return
9889        }
9890        // IE textarea placeholder bug
9891        /* istanbul ignore if */
9892        if (isIE &&
9893          currentParent.tag === 'textarea' &&
9894          currentParent.attrsMap.placeholder === text
9895        ) {
9896          return
9897        }
9898        var children = currentParent.children;
9899        if (inPre || text.trim()) {
9900          text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
9901        } else if (!children.length) {
9902          // remove the whitespace-only node right after an opening tag
9903          text = '';
9904        } else if (whitespaceOption) {
9905          if (whitespaceOption === 'condense') {
9906            // in condense mode, remove the whitespace node if it contains
9907            // line break, otherwise condense to a single space
9908            text = lineBreakRE.test(text) ? '' : ' ';
9909          } else {
9910            text = ' ';
9911          }
9912        } else {
9913          text = preserveWhitespace ? ' ' : '';
9914        }
9915        if (text) {
9916          if (!inPre && whitespaceOption === 'condense') {
9917            // condense consecutive whitespaces into single space
9918            text = text.replace(whitespaceRE$1, ' ');
9919          }
9920          var res;
9921          var child;
9922          if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
9923            child = {
9924              type: 2,
9925              expression: res.expression,
9926              tokens: res.tokens,
9927              text: text
9928            };
9929          } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
9930            child = {
9931              type: 3,
9932              text: text
9933            };
9934          }
9935          if (child) {
9936            if (options.outputSourceRange) {
9937              child.start = start;
9938              child.end = end;
9939            }
9940            children.push(child);
9941          }
9942        }
9943      },
9944      comment: function comment (text, start, end) {
9945        // adding anything as a sibling to the root node is forbidden
9946        // comments should still be allowed, but ignored
9947        if (currentParent) {
9948          var child = {
9949            type: 3,
9950            text: text,
9951            isComment: true
9952          };
9953          if (options.outputSourceRange) {
9954            child.start = start;
9955            child.end = end;
9956          }
9957          currentParent.children.push(child);
9958        }
9959      }
9960    });
9961    return root
9962  }
9963
9964  function processPre (el) {
9965    if (getAndRemoveAttr(el, 'v-pre') != null) {
9966      el.pre = true;
9967    }
9968  }
9969
9970  function processRawAttrs (el) {
9971    var list = el.attrsList;
9972    var len = list.length;
9973    if (len) {
9974      var attrs = el.attrs = new Array(len);
9975      for (var i = 0; i < len; i++) {
9976        attrs[i] = {
9977          name: list[i].name,
9978          value: JSON.stringify(list[i].value)
9979        };
9980        if (list[i].start != null) {
9981          attrs[i].start = list[i].start;
9982          attrs[i].end = list[i].end;
9983        }
9984      }
9985    } else if (!el.pre) {

9986      // non root node in pre blocks with no attributes
9987      el.plain = true;
9988    }
9989  }
9990
9991  function processElement (
9992    element,
9993    options
9994  ) {
9995    processKey(element);
9996
9997    // determine whether this is a plain element after
9998    // removing structural attributes
9999    element.plain = (
10000      !element.key &&
10001      !element.scopedSlots &&
10002      !element.attrsList.length
10003    );
10004
10005    processRef(element);
10006    processSlotContent(element);
10007    processSlotOutlet(element);
10008    processComponent(element);
10009    for (var i = 0; i < transforms.length; i++) {
10010      element = transforms[i](element, options) || element;
10011    }
10012    processAttrs(element);
10013    return element
10014  }
10015
10016  function processKey (el) {
10017    var exp = getBindingAttr(el, 'key');
10018    if (exp) {
10019      {
10020        if (el.tag === 'template') {
10021          warn$2(
10022            "<template> cannot be keyed. Place the key on real elements instead.",
10023            getRawBindingAttr(el, 'key')
10024          );
10025        }
10026        if (el.for) {
10027          var iterator = el.iterator2 || el.iterator1;
10028          var parent = el.parent;
10029          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
10030            warn$2(
10031              "Do not use v-for index as key on <transition-group> children, " +
10032              "this is the same as not using keys.",
10033              getRawBindingAttr(el, 'key'),
10034              true /* tip */
10035            );
10036          }
10037        }
10038      }
10039      el.key = exp;
10040    }
10041  }
10042
10043  function processRef (el) {
10044    var ref = getBindingAttr(el, 'ref');
10045    if (ref) {
10046      el.ref = ref;
10047      el.refInFor = checkInFor(el);
10048    }
10049  }
10050
10051  function processFor (el) {
10052    var exp;
10053    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
10054      var res = parseFor(exp);
10055      if (res) {
10056        extend(el, res);
10057      } else {
10058        warn$2(
10059          ("Invalid v-for expression: " + exp),
10060          el.rawAttrsMap['v-for']
10061        );
10062      }
10063    }
10064  }
10065
10066
10067
10068  function parseFor (exp) {
10069    var inMatch = exp.match(forAliasRE);
10070    if (!inMatch) { return }
10071    var res = {};
10072    res.for = inMatch[2].trim();
10073    var alias = inMatch[1].trim().replace(stripParensRE, '');
10074    var iteratorMatch = alias.match(forIteratorRE);
10075    if (iteratorMatch) {
10076      res.alias = alias.replace(forIteratorRE, '').trim();
10077      res.iterator1 = iteratorMatch[1].trim();
10078      if (iteratorMatch[2]) {
10079        res.iterator2 = iteratorMatch[2].trim();
10080      }
10081    } else {
10082      res.alias = alias;
10083    }
10084    return res
10085  }
10086
10087  function processIf (el) {
10088    var exp = getAndRemoveAttr(el, 'v-if');
10089    if (exp) {
10090      el.if = exp;
10091      addIfCondition(el, {
10092        exp: exp,
10093        block: el
10094      });
10095    } else {
10096      if (getAndRemoveAttr(el, 'v-else') != null) {
10097        el.else = true;
10098      }
10099      var elseif = getAndRemoveAttr(el, 'v-else-if');
10100      if (elseif) {
10101        el.elseif = elseif;
10102      }
10103    }
10104  }
10105
10106  function processIfConditions (el, parent) {
10107    var prev = findPrevElement(parent.children);
10108    if (prev && prev.if) {
10109      addIfCondition(prev, {
10110        exp: el.elseif,
10111        block: el
10112      });
10113    } else {
10114      warn$2(
10115        "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
10116        "used on element <" + (el.tag) + "> without corresponding v-if.",
10117        el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
10118      );
10119    }
10120  }
10121
10122  function findPrevElement (children) {
10123    var i = children.length;
10124    while (i--) {
10125      if (children[i].type === 1) {
10126        return children[i]
10127      } else {
10128        if (children[i].text !== ' ') {
10129          warn$2(
10130            "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
10131            "will be ignored.",
10132            children[i]
10133          );
10134        }
10135        children.pop();
10136      }
10137    }
10138  }
10139
10140  function addIfCondition (el, condition) {
10141    if (!el.ifConditions) {
10142      el.ifConditions = [];
10143    }
10144    el.ifConditions.push(condition);
10145  }
10146
10147  function processOnce (el) {
10148    var once$$1 = getAndRemoveAttr(el, 'v-once');
10149    if (once$$1 != null) {
10150      el.once = true;
10151    }
10152  }
10153
10154  // handle content being passed to a component as slot,

10155  // e.g. <template slot="xxx">, <div slot-scope="xxx">
10156  function processSlotContent (el) {
10157    var slotScope;
10158    if (el.tag === 'template') {
10159      slotScope = getAndRemoveAttr(el, 'scope');
10160      /* istanbul ignore if */
10161      if (slotScope) {
10162        warn$2(
10163          "the \"scope\" attribute for scoped slots have been deprecated and " +
10164          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
10165          "can also be used on plain elements in addition to <template> to " +
10166          "denote scoped slots.",
10167          el.rawAttrsMap['scope'],
10168          true
10169        );
10170      }
10171      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
10172    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
10173      /* istanbul ignore if */
10174      if (el.attrsMap['v-for']) {
10175        warn$2(
10176          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
10177          "(v-for takes higher priority). Use a wrapper <template> for the " +
10178          "scoped slot to make it clearer.",
10179          el.rawAttrsMap['slot-scope'],
10180          true
10181        );
10182      }
10183      el.slotScope = slotScope;
10184    }
10185
10186    // slot="xxx"
10187    var slotTarget = getBindingAttr(el, 'slot');
10188    if (slotTarget) {
10189      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
10190      el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
10191      // preserve slot as an attribute for native shadow DOM compat
10192      // only for non-scoped slots.
10193      if (el.tag !== 'template' && !el.slotScope) {
10194        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
10195      }
10196    }
10197
10198    // 2.6 v-slot syntax
10199    {
10200      if (el.tag === 'template') {
10201        // v-slot on <template>
10202        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
10203        if (slotBinding) {
10204          {
10205            if (el.slotTarget || el.slotScope) {
10206              warn$2(
10207                "Unexpected mixed usage of different slot syntaxes.",
10208                el
10209              );
10210            }
10211            if (el.parent && !maybeComponent(el.parent)) {
10212              warn$2(
10213                "<template v-slot> can only appear at the root level inside " +
10214                "the receiving component",
10215                el
10216              );
10217            }
10218          }
10219          var ref = getSlotName(slotBinding);
10220          var name = ref.name;
10221          var dynamic = ref.dynamic;
10222          el.slotTarget = name;
10223          el.slotTargetDynamic = dynamic;
10224          el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
10225        }
10226      } else {
10227        // v-slot on component, denotes default slot
10228        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
10229        if (slotBinding$1) {
10230          {
10231            if (!maybeComponent(el)) {
10232              warn$2(
10233                "v-slot can only be used on components or <template>.",
10234                slotBinding$1
10235              );
10236            }
10237            if (el.slotScope || el.slotTarget) {
10238              warn$2(
10239                "Unexpected mixed usage of different slot syntaxes.",
10240                el
10241              );
10242            }
10243            if (el.scopedSlots) {
10244              warn$2(
10245                "To avoid scope ambiguity, the default slot should also use " +
10246                "<template> syntax when there are other named slots.",
10247                slotBinding$1
10248              );
10249            }
10250          }
10251          // add the component's children to its default slot
10252          var slots = el.scopedSlots || (el.scopedSlots = {});
10253          var ref$1 = getSlotName(slotBinding$1);
10254          var name$1 = ref$1.name;
10255          var dynamic$1 = ref$1.dynamic;
10256          var slotContainer = slots[name$1] = createASTElement('template', [], el);
10257          slotContainer.slotTarget = name$1;
10258          slotContainer.slotTargetDynamic = dynamic$1;
10259          slotContainer.children = el.children.filter(function (c) {
10260            if (!c.slotScope) {
10261              c.parent = slotContainer;
10262              return true
10263            }
10264          });
10265          slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
10266          // remove children as they are returned from scopedSlots now
10267          el.children = [];
10268          // mark el non-plain so data gets generated
10269          el.plain = false;

10270        }
10271      }
10272    }
10273  }
10274
10275  function getSlotName (binding) {
10276    var name = binding.name.replace(slotRE, '');
10277    if (!name) {
10278      if (binding.name[0] !== '#') {
10279        name = 'default';
10280      } else {
10281        warn$2(
10282          "v-slot shorthand syntax requires a slot name.",
10283          binding
10284        );
10285      }
10286    }
10287    return dynamicArgRE.test(name)
10288      // dynamic [name]
10289      ? { name: name.slice(1, -1), dynamic: true }
10290      // static name
10291      : { name: ("\"" + name + "\""), dynamic: false }
10292  }
10293
10294  // handle <slot/> outlets
10295  function processSlotOutlet (el) {
10296    if (el.tag === 'slot') {
10297      el.slotName = getBindingAttr(el, 'name');
10298      if (el.key) {
10299        warn$2(
10300          "`key` does not work on <slot> because slots are abstract outlets " +
10301          "and can possibly expand into multiple elements. " +
10302          "Use the key on a wrapping element instead.",
10303          getRawBindingAttr(el, 'key')
10304        );
10305      }
10306    }
10307  }
10308
10309  function processComponent (el) {
10310    var binding;
10311    if ((binding = getBindingAttr(el, 'is'))) {
10312      el.component = binding;
10313    }
10314    if (getAndRemoveAttr(el, 'inline-template') != null) {
10315      el.inlineTemplate = true;
10316    }
10317  }
10318
10319  function processAttrs (el) {
10320    var list = el.attrsList;
10321    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
10322    for (i = 0, l = list.length; i < l; i++) {
10323      name = rawName = list[i].name;
10324      value = list[i].value;
10325      if (dirRE.test(name)) {
10326        // mark element as dynamic
10327        el.hasBindings = true;
10328        // modifiers
10329        modifiers = parseModifiers(name.replace(dirRE, ''));
10330        // support .foo shorthand syntax for the .prop modifier
10331        if (modifiers) {
10332          name = name.replace(modifierRE, '');
10333        }
10334        if (bindRE.test(name)) { // v-bind
10335          name = name.replace(bindRE, '');
10336          value = parseFilters(value);
10337          isDynamic = dynamicArgRE.test(name);
10338          if (isDynamic) {
10339            name = name.slice(1, -1);
10340          }
10341          if (
10342            value.trim().length === 0
10343          ) {
10344            warn$2(
10345              ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
10346            );
10347          }
10348          if (modifiers) {
10349            if (modifiers.prop && !isDynamic) {
10350              name = camelize(name);
10351              if (name === 'innerHtml') { name = 'innerHTML'; }
10352            }
10353            if (modifiers.camel && !isDynamic) {
10354              name = camelize(name);
10355            }
10356            if (modifiers.sync) {
10357              syncGen = genAssignmentCode(value, "$event");
10358              if (!isDynamic) {
10359                addHandler(
10360                  el,
10361                  ("update:" + (camelize(name))),
10362                  syncGen,
10363                  null,
10364                  false,
10365                  warn$2,
10366                  list[i]
10367                );
10368                if (hyphenate(name) !== camelize(name)) {
10369                  addHandler(
10370                    el,
10371                    ("update:" + (hyphenate(name))),
10372                    syncGen,
10373                    null,
10374                    false,
10375                    warn$2,
10376                    list[i]
10377                  );
10378                }
10379              } else {
10380                // handler w/ dynamic event name
10381                addHandler(
10382                  el,
10383                  ("\"update:\"+(" + name + ")"),
10384                  syncGen,
10385                  null,
10386                  false,
10387                  warn$2,
10388                  list[i],
10389                  true // dynamic
10390                );
10391              }
10392            }
10393          }
10394          if ((modifiers && modifiers.prop) || (
10395            !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
10396          )) {
10397            addProp(el, name, value, list[i], isDynamic);
10398          } else {
10399            addAttr(el, name, value, list[i], isDynamic);
10400          }
10401        } else if (onRE.test(name)) { // v-on
10402          name = name.replace(onRE, '');
10403          isDynamic = dynamicArgRE.test(name);
10404          if (isDynamic) {
10405            name = name.slice(1, -1);
10406          }
10407          addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
10408        } else { // normal directives
10409          name = name.replace(dirRE, '');
10410          // parse arg
10411          var argMatch = name.match(argRE);
10412          var arg = argMatch && argMatch[1];
10413          isDynamic = false;

10414          if (arg) {
10415            name = name.slice(0, -(arg.length + 1));
10416            if (dynamicArgRE.test(arg)) {
10417              arg = arg.slice(1, -1);
10418              isDynamic = true;
10419            }
10420          }
10421          addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
10422          if (name === 'model') {
10423            checkForAliasModel(el, value);
10424          }
10425        }
10426      } else {
10427        // literal attribute
10428        {
10429          var res = parseText(value, delimiters);
10430          if (res) {
10431            warn$2(
10432              name + "=\"" + value + "\": " +
10433              'Interpolation inside attributes has been removed. ' +
10434              'Use v-bind or the colon shorthand instead. For example, ' +
10435              'instead of <div id="{{ val }}">, use <div :id="val">.',
10436              list[i]
10437            );
10438          }
10439        }
10440        addAttr(el, name, JSON.stringify(value), list[i]);
10441        // #6887 firefox doesn't update muted state if set via attribute
10442        // even immediately after element creation
10443        if (!el.component &&
10444            name === 'muted' &&
10445            platformMustUseProp(el.tag, el.attrsMap.type, name)) {
10446          addProp(el, name, 'true', list[i]);
10447        }
10448      }
10449    }
10450  }
10451
10452  function checkInFor (el) {
10453    var parent = el;
10454    while (parent) {
10455      if (parent.for !== undefined) {
10456        return true
10457      }
10458      parent = parent.parent;
10459    }
10460    return false
10461  }
10462
10463  function parseModifiers (name) {
10464    var match = name.match(modifierRE);
10465    if (match) {
10466      var ret = {};
10467      match.forEach(function (m) { ret[m.slice(1)] = true; });
10468      return ret
10469    }
10470  }
10471
10472  function makeAttrsMap (attrs) {
10473    var map = {};
10474    for (var i = 0, l = attrs.length; i < l; i++) {
10475      if (
10476        map[attrs[i].name] && !isIE && !isEdge
10477      ) {
10478        warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
10479      }
10480      map[attrs[i].name] = attrs[i].value;
10481    }
10482    return map
10483  }
10484
10485  // for script (e.g. type="x/template") or style, do not decode content
10486  function isTextTag (el) {
10487    return el.tag === 'script' || el.tag === 'style'
10488  }
10489
10490  function isForbiddenTag (el) {
10491    return (
10492      el.tag === 'style' ||
10493      (el.tag === 'script' && (
10494        !el.attrsMap.type ||
10495        el.attrsMap.type === 'text/javascript'
10496      ))
10497    )
10498  }
10499
10500  var ieNSBug = /^xmlns:NS\d+/;
10501  var ieNSPrefix = /^NS\d+:/;
10502
10503  /* istanbul ignore next */
10504  function guardIESVGBug (attrs) {
10505    var res = [];
10506    for (var i = 0; i < attrs.length; i++) {
10507      var attr = attrs[i];
10508      if (!ieNSBug.test(attr.name)) {
10509        attr.name = attr.name.replace(ieNSPrefix, '');
10510        res.push(attr);
10511      }
10512    }
10513    return res
10514  }
10515
10516  function checkForAliasModel (el, value) {
10517    var _el = el;
10518    while (_el) {
10519      if (_el.for && _el.alias === value) {
10520        warn$2(
10521          "<" + (el.tag) + " v-model=\"" + value + "\">: " +
10522          "You are binding v-model directly to a v-for iteration alias. " +
10523          "This will not be able to modify the v-for source array because " +
10524          "writing to the alias is like modifying a function local variable. " +
10525          "Consider using an array of objects and use v-model on an object property instead.",
10526          el.rawAttrsMap['v-model']
10527        );
10528      }
10529      _el = _el.parent;
10530    }
10531  }
10532
10533  /*  */
10534
10535  function preTransformNode (el, options) {
10536    if (el.tag === 'input') {
10537      var map = el.attrsMap;
10538      if (!map['v-model']) {
10539        return
10540      }
10541
10542      var typeBinding;
10543      if (map[':type'] || map['v-bind:type']) {
10544        typeBinding = getBindingAttr(el, 'type');
10545      }
10546      if (!map.type && !typeBinding && map['v-bind']) {
10547        typeBinding = "(" + (map['v-bind']) + ").type";
10548      }
10549
10550      if (typeBinding) {
10551        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
10552        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
10553        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
10554        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
10555        // 1. checkbox
10556        var branch0 = cloneASTElement(el);
10557        // process for on the main node
10558        processFor(branch0);
10559        addRawAttr(branch0, 'type', 'checkbox');
10560        processElement(branch0, options);
10561        branch0.processed = true; // prevent it from double-processed
10562        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
10563        addIfCondition(branch0, {
10564          exp: branch0.if,
10565          block: branch0
10566        });
10567        // 2. add radio else-if condition
10568        var branch1 = cloneASTElement(el);
10569        getAndRemoveAttr(branch1, 'v-for', true);
10570        addRawAttr(branch1, 'type', 'radio');
10571        processElement(branch1, options);
10572        addIfCondition(branch0, {
10573          exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
10574          block: branch1
10575        });
10576        // 3. other
10577        var branch2 = cloneASTElement(el);
10578        getAndRemoveAttr(branch2, 'v-for', true);
10579        addRawAttr(branch2, ':type', typeBinding);
10580        processElement(branch2, options);
10581        addIfCondition(branch0, {
10582          exp: ifCondition,
10583          block: branch2
10584        });
10585
10586        if (hasElse) {
10587          branch0.else = true;
10588        } else if (elseIfCondition) {
10589          branch0.elseif = elseIfCondition;
10590        }
10591
10592        return branch0
10593      }
10594    }
10595  }
10596
10597  function cloneASTElement (el) {
10598    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
10599  }
10600
10601  var model$1 = {
10602    preTransformNode: preTransformNode
10603  };
10604
10605  var modules$1 = [
10606    klass$1,
10607    style$1,
10608    model$1
10609  ];
10610
10611  /*  */
10612
10613  function text (el, dir) {
10614    if (dir.value) {
10615      addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
10616    }
10617  }
10618
10619  /*  */
10620
10621  function html (el, dir) {
10622    if (dir.value) {
10623      addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
10624    }
10625  }
10626
10627  var directives$1 = {
10628    model: model,
10629    text: text,
10630    html: html
10631  };
10632
10633  /*  */
10634
10635  var baseOptions = {
10636    expectHTML: true,
10637    modules: modules$1,
10638    directives: directives$1,
10639    isPreTag: isPreTag,
10640    isUnaryTag: isUnaryTag,
10641    mustUseProp: mustUseProp,
10642    canBeLeftOpenTag: canBeLeftOpenTag,
10643    isReservedTag: isReservedTag,
10644    getTagNamespace: getTagNamespace,
10645    staticKeys: genStaticKeys(modules$1)
10646  };
10647
10648  /*  */
10649
10650  var isStaticKey;
10651  var isPlatformReservedTag;
10652

10653  var genStaticKeysCached = cached(genStaticKeys$1);
10654
10655  /**
10656   * Goal of the optimizer: walk the generated template AST tree
10657   * and detect sub-trees that are purely static, i.e. parts of
10658   * the DOM that never needs to change.
10659   *
10660   * Once we detect these sub-trees, we can:
10661   *
10662   * 1. Hoist them into constants, so that we no longer need to
10663   *    create fresh nodes for them on each re-render;
10664   * 2. Completely skip them in the patching process.
10665   */
10666  function optimize (root, options) {
10667    if (!root) { return }
10668    isStaticKey = genStaticKeysCached(options.staticKeys || '');
10669    isPlatformReservedTag = options.isReservedTag || no;
10670    // first pass: mark all non-static nodes.
10671    markStatic$1(root);
10672    // second pass: mark static roots.
10673    markStaticRoots(root, false);
10674  }
10675
10676  function genStaticKeys$1 (keys) {
10677    return makeMap(
10678      'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
10679      (keys ? ',' + keys : '')
10680    )
10681  }
10682
10683  function markStatic$1 (node) {
10684    node.static = isStatic(node);
10685    if (node.type === 1) {
10686      // do not make component slot content static. this avoids
10687      // 1. components not able to mutate slot nodes
10688      // 2. static slot content fails for hot-reloading
10689      if (
10690        !isPlatformReservedTag(node.tag) &&
10691        node.tag !== 'slot' &&
10692        node.attrsMap['inline-template'] == null
10693      ) {
10694        return
10695      }
10696      for (var i = 0, l = node.children.length; i < l; i++) {
10697        var child = node.children[i];
10698        markStatic$1(child);
10699        if (!child.static) {
10700          node.static = false;
10701        }
10702      }
10703      if (node.ifConditions) {
10704        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
10705          var block = node.ifConditions[i$1].block;
10706          markStatic$1(block);
10707          if (!block.static) {
10708            node.static = false;
10709          }
10710        }
10711      }
10712    }
10713  }
10714
10715  function markStaticRoots (node, isInFor) {
10716    if (node.type === 1) {
10717      if (node.static || node.once) {
10718        node.staticInFor = isInFor;
10719      }
10720      // For a node to qualify as a static root, it should have children that
10721      // are not just static text. Otherwise the cost of hoisting out will
10722      // outweigh the benefits and it's better off to just always render it fresh.
10723      if (node.static && node.children.length && !(
10724        node.children.length === 1 &&
10725        node.children[0].type === 3
10726      )) {
10727        node.staticRoot = true;
10728        return
10729      } else {
10730        node.staticRoot = false;
10731      }
10732      if (node.children) {
10733        for (var i = 0, l = node.children.length; i < l; i++) {
10734          markStaticRoots(node.children[i], isInFor || !!node.for);
10735        }
10736      }
10737      if (node.ifConditions) {
10738        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
10739          markStaticRoots(node.ifConditions[i$1].block, isInFor);
10740        }
10741      }
10742    }
10743  }
10744
10745  function isStatic (node) {
10746    if (node.type === 2) { // expression
10747      return false
10748    }
10749    if (node.type === 3) { // text
10750      return true
10751    }
10752    return !!(node.pre || (
10753      !node.hasBindings && // no dynamic bindings
10754      !node.if && !node.for && // not v-if or v-for or v-else
10755      !isBuiltInTag(node.tag) && // not a built-in
10756      isPlatformReservedTag(node.tag) && // not a component
10757      !isDirectChildOfTemplateFor(node) &&
10758      Object.keys(node).every(isStaticKey)
10759    ))
10760  }
10761
10762  function isDirectChildOfTemplateFor (node) {
10763    while (node.parent) {
10764      node = node.parent;
10765      if (node.tag !== 'template') {
10766        return false
10767      }
10768      if (node.for) {
10769        return true
10770      }
10771    }
10772    return false
10773  }
10774
10775  /*  */
10776
10777  var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
10778  var fnInvokeRE = /\([^)]*?\);*$/;
10779  var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
10780
10781  // KeyboardEvent.keyCode aliases
10782  var keyCodes = {
10783    esc: 27,
10784    tab: 9,
10785    enter: 13,
10786    space: 32,
10787    up: 38,
10788    left: 37,
10789    right: 39,
10790    down: 40,
10791    'delete': [8, 46]
10792  };
10793
10794  // KeyboardEvent.key aliases
10795  var keyNames = {
10796    // #7880: IE11 and Edge use `Esc` for Escape key name.
10797    esc: ['Esc', 'Escape'],
10798    tab: 'Tab',
10799    enter: 'Enter',
10800    // #9112: IE11 uses `Spacebar` for Space key name.
10801    space: [' ', 'Spacebar'],
10802    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
10803    up: ['Up', 'ArrowUp'],
10804    left: ['Left', 'ArrowLeft'],
10805    right: ['Right', 'ArrowRight'],

10806    down: ['Down', 'ArrowDown'],
10807    // #9112: IE11 uses `Del` for Delete key name.
10808    'delete': ['Backspace', 'Delete', 'Del']
10809  };
10810
10811  // #4868: modifiers that prevent the execution of the listener
10812  // need to explicitly return null so that we can determine whether to remove
10813  // the listener for .once
10814  var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
10815
10816  var modifierCode = {
10817    stop: '$event.stopPropagation();',
10818    prevent: '$event.preventDefault();',
10819    self: genGuard("$event.target !== $event.currentTarget"),
10820    ctrl: genGuard("!$event.ctrlKey"),
10821    shift: genGuard("!$event.shiftKey"),
10822    alt: genGuard("!$event.altKey"),
10823    meta: genGuard("!$event.metaKey"),
10824    left: genGuard("'button' in $event && $event.button !== 0"),
10825    middle: genGuard("'button' in $event && $event.button !== 1"),
10826    right: genGuard("'button' in $event && $event.button !== 2")
10827  };
10828
10829  function genHandlers (
10830    events,
10831    isNative
10832  ) {
10833    var prefix = isNative ? 'nativeOn:' : 'on:';
10834    var staticHandlers = "";
10835    var dynamicHandlers = "";
10836    for (var name in events) {
10837      var handlerCode = genHandler(events[name]);
10838      if (events[name] && events[name].dynamic) {
10839        dynamicHandlers += name + "," + handlerCode + ",";
10840      } else {
10841        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
10842      }
10843    }
10844    staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
10845    if (dynamicHandlers) {
10846      return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
10847    } else {
10848      return prefix + staticHandlers
10849    }
10850  }
10851
10852  function genHandler (handler) {
10853    if (!handler) {
10854      return 'function(){}'
10855    }
10856
10857    if (Array.isArray(handler)) {
10858      return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
10859    }
10860
10861    var isMethodPath = simplePathRE.test(handler.value);
10862    var isFunctionExpression = fnExpRE.test(handler.value);
10863    var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
10864
10865    if (!handler.modifiers) {
10866      if (isMethodPath || isFunctionExpression) {
10867        return handler.value
10868      }
10869      return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
10870    } else {
10871      var code = '';
10872      var genModifierCode = '';
10873      var keys = [];
10874      for (var key in handler.modifiers) {
10875        if (modifierCode[key]) {
10876          genModifierCode += modifierCode[key];
10877          // left/right
10878          if (keyCodes[key]) {
10879            keys.push(key);
10880          }
10881        } else if (key === 'exact') {
10882          var modifiers = (handler.modifiers);
10883          genModifierCode += genGuard(
10884            ['ctrl', 'shift', 'alt', 'meta']
10885              .filter(function (keyModifier) { return !modifiers[keyModifier]; })
10886              .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
10887              .join('||')
10888          );
10889        } else {
10890          keys.push(key);
10891        }
10892      }
10893      if (keys.length) {
10894        code += genKeyFilter(keys);
10895      }
10896      // Make sure modifiers like prevent and stop get executed after key filtering
10897      if (genModifierCode) {
10898        code += genModifierCode;
10899      }
10900      var handlerCode = isMethodPath
10901        ? ("return " + (handler.value) + ".apply(null, arguments)")
10902        : isFunctionExpression
10903          ? ("return (" + (handler.value) + ").apply(null, arguments)")
10904          : isFunctionInvocation
10905            ? ("return " + (handler.value))
10906            : handler.value;
10907      return ("function($event){" + code + handlerCode + "}")
10908    }
10909  }
10910
10911  function genKeyFilter (keys) {
10912    return (
10913      // make sure the key filters only apply to KeyboardEvents
10914      // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
10915      // key events that do not have keyCode property...
10916      "if(!$event.type.indexOf('key')&&" +
10917      (keys.map(genFilterCode).join('&&')) + ")return null;"
10918    )
10919  }
10920
10921  function genFilterCode (key) {
10922    var keyVal = parseInt(key, 10);
10923    if (keyVal) {
10924      return ("$event.keyCode!==" + keyVal)
10925    }
10926    var keyCode = keyCodes[key];
10927    var keyName = keyNames[key];
10928    return (
10929      "_k($event.keyCode," +
10930      (JSON.stringify(key)) + "," +
10931      (JSON.stringify(keyCode)) + "," +
10932      "$event.key," +
10933      "" + (JSON.stringify(keyName)) +
10934      ")"
10935    )
10936  }
10937
10938  /*  */
10939
10940  function on (el, dir) {
10941    if (dir.modifiers) {
10942      warn("v-on without argument does not support modifiers.");
10943    }
10944    el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
10945  }
10946
10947  /*  */
10948
10949  function bind$1 (el, dir) {
10950    el.wrapData = function (code) {
10951      return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
10952    };
10953  }
10954
10955  /*  */
10956
10957  var baseDirectives = {
10958    on: on,
10959    bind: bind$1,
10960    cloak: noop
10961  };
10962
10963  /*  */
10964
10965
10966
10967
10968
10969  var CodegenState = function CodegenState (options) {
10970    this.options = options;
10971    this.warn = options.warn || baseWarn;
10972    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
10973    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
10974    this.directives = extend(extend({}, baseDirectives), options.directives);
10975    var isReservedTag = options.isReservedTag || no;
10976    this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
10977    this.onceId = 0;
10978    this.staticRenderFns = [];
10979    this.pre = false;

10980  };
10981
10982
10983
10984  function generate (
10985    ast,
10986    options
10987  ) {
10988    var state = new CodegenState(options);
10989    // fix #11483, Root level <script> tags should not be rendered.
10990    var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
10991    return {
10992      render: ("with(this){return " + code + "}"),
10993      staticRenderFns: state.staticRenderFns
10994    }
10995  }
10996
10997  function genElement (el, state) {
10998    if (el.parent) {
10999      el.pre = el.pre || el.parent.pre;
11000    }
11001
11002    if (el.staticRoot && !el.staticProcessed) {
11003      return genStatic(el, state)
11004    } else if (el.once && !el.onceProcessed) {
11005      return genOnce(el, state)
11006    } else if (el.for && !el.forProcessed) {
11007      return genFor(el, state)
11008    } else if (el.if && !el.ifProcessed) {
11009      return genIf(el, state)
11010    } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
11011      return genChildren(el, state) || 'void 0'
11012    } else if (el.tag === 'slot') {
11013      return genSlot(el, state)
11014    } else {
11015      // component or element
11016      var code;
11017      if (el.component) {
11018        code = genComponent(el.component, el, state);
11019      } else {
11020        var data;
11021        if (!el.plain || (el.pre && state.maybeComponent(el))) {
11022          data = genData$2(el, state);
11023        }
11024
11025        var children = el.inlineTemplate ? null : genChildren(el, state, true);
11026        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
11027      }
11028      // module transforms
11029      for (var i = 0; i < state.transforms.length; i++) {
11030        code = state.transforms[i](el, code);
11031      }
11032      return code
11033    }
11034  }
11035
11036  // hoist static sub-trees out
11037  function genStatic (el, state) {
11038    el.staticProcessed = true;
11039    // Some elements (templates) need to behave differently inside of a v-pre
11040    // node.  All pre nodes are static roots, so we can use this as a location to
11041    // wrap a state change and reset it upon exiting the pre node.
11042    var originalPreState = state.pre;
11043    if (el.pre) {
11044      state.pre = el.pre;
11045    }
11046    state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
11047    state.pre = originalPreState;
11048    return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
11049  }
11050
11051  // v-once
11052  function genOnce (el, state) {
11053    el.onceProcessed = true;
11054    if (el.if && !el.ifProcessed) {
11055      return genIf(el, state)
11056    } else if (el.staticInFor) {
11057      var key = '';
11058      var parent = el.parent;
11059      while (parent) {
11060        if (parent.for) {
11061          key = parent.key;
11062          break
11063        }
11064        parent = parent.parent;
11065      }
11066      if (!key) {
11067        state.warn(
11068          "v-once can only be used inside v-for that is keyed. ",
11069          el.rawAttrsMap['v-once']
11070        );
11071        return genElement(el, state)
11072      }
11073      return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
11074    } else {
11075      return genStatic(el, state)
11076    }
11077  }
11078
11079  function genIf (
11080    el,
11081    state,
11082    altGen,
11083    altEmpty
11084  ) {
11085    el.ifProcessed = true; // avoid recursion
11086    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
11087  }
11088
11089  function genIfConditions (
11090    conditions,
11091    state,
11092    altGen,
11093    altEmpty
11094  ) {
11095    if (!conditions.length) {
11096      return altEmpty || '_e()'
11097    }
11098
11099    var condition = conditions.shift();
11100    if (condition.exp) {
11101      return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
11102    } else {
11103      return ("" + (genTernaryExp(condition.block)))
11104    }
11105
11106    // v-if with v-once should generate code like (a)?_m(0):_m(1)
11107    function genTernaryExp (el) {
11108      return altGen
11109        ? altGen(el, state)
11110        : el.once
11111          ? genOnce(el, state)
11112          : genElement(el, state)
11113    }
11114  }
11115
11116  function genFor (
11117    el,
11118    state,
11119    altGen,
11120    altHelper
11121  ) {
11122    var exp = el.for;
11123    var alias = el.alias;
11124    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
11125    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
11126
11127    if (state.maybeComponent(el) &&
11128      el.tag !== 'slot' &&
11129      el.tag !== 'template' &&
11130      !el.key
11131    ) {
11132      state.warn(
11133        "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
11134        "v-for should have explicit keys. " +
11135        "See https://vuejs.org/guide/list.html#key for more info.",
11136        el.rawAttrsMap['v-for'],
11137        true /* tip */
11138      );
11139    }
11140
11141    el.forProcessed = true; // avoid recursion
11142    return (altHelper || '_l') + "((" + exp + ")," +
11143      "function(" + alias + iterator1 + iterator2 + "){" +
11144        "return " + ((altGen || genElement)(el, state)) +
11145      '})'
11146  }
11147
11148  function genData$2 (el, state) {
11149    var data = '{';
11150
11151    // directives first.
11152    // directives may mutate the el's other properties before they are generated.
11153    var dirs = genDirectives(el, state);
11154    if (dirs) { data += dirs + ','; }
11155
11156    // key
11157    if (el.key) {
11158      data += "key:" + (el.key) + ",";
11159    }
11160    // ref
11161    if (el.ref) {
11162      data += "ref:" + (el.ref) + ",";
11163    }
11164    if (el.refInFor) {
11165      data += "refInFor:true,";
11166    }
11167    // pre
11168    if (el.pre) {
11169      data += "pre:true,";
11170    }
11171    // record original tag name for components using "is" attribute
11172    if (el.component) {
11173      data += "tag:\"" + (el.tag) + "\",";
11174    }
11175    // module data generation functions
11176    for (var i = 0; i < state.dataGenFns.length; i++) {
11177      data += state.dataGenFns[i](el);
11178    }
11179    // attributes
11180    if (el.attrs) {

11181      data += "attrs:" + (genProps(el.attrs)) + ",";
11182    }
11183    // DOM props
11184    if (el.props) {
11185      data += "domProps:" + (genProps(el.props)) + ",";
11186    }
11187    // event handlers
11188    if (el.events) {
11189      data += (genHandlers(el.events, false)) + ",";
11190    }
11191    if (el.nativeEvents) {
11192      data += (genHandlers(el.nativeEvents, true)) + ",";
11193    }
11194    // slot target
11195    // only for non-scoped slots
11196    if (el.slotTarget && !el.slotScope) {
11197      data += "slot:" + (el.slotTarget) + ",";
11198    }
11199    // scoped slots
11200    if (el.scopedSlots) {
11201      data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
11202    }
11203    // component v-model
11204    if (el.model) {
11205      data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
11206    }
11207    // inline-template
11208    if (el.inlineTemplate) {
11209      var inlineTemplate = genInlineTemplate(el, state);
11210      if (inlineTemplate) {
11211        data += inlineTemplate + ",";
11212      }
11213    }
11214    data = data.replace(/,$/, '') + '}';
11215    // v-bind dynamic argument wrap
11216    // v-bind with dynamic arguments must be applied using the same v-bind object
11217    // merge helper so that class/style/mustUseProp attrs are handled correctly.
11218    if (el.dynamicAttrs) {
11219      data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
11220    }
11221    // v-bind data wrap
11222    if (el.wrapData) {
11223      data = el.wrapData(data);
11224    }
11225    // v-on data wrap
11226    if (el.wrapListeners) {
11227      data = el.wrapListeners(data);
11228    }
11229    return data
11230  }
11231
11232  function genDirectives (el, state) {
11233    var dirs = el.directives;
11234    if (!dirs) { return }
11235    var res = 'directives:[';
11236    var hasRuntime = false;
11237    var i, l, dir, needRuntime;
11238    for (i = 0, l = dirs.length; i < l; i++) {
11239      dir = dirs[i];
11240      needRuntime = true;
11241      var gen = state.directives[dir.name];
11242      if (gen) {
11243        // compile-time directive that manipulates AST.
11244        // returns true if it also needs a runtime counterpart.
11245        needRuntime = !!gen(el, dir, state.warn);
11246      }
11247      if (needRuntime) {
11248        hasRuntime = true;
11249        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))) : '') + "},";
11250      }
11251    }
11252    if (hasRuntime) {
11253      return res.slice(0, -1) + ']'
11254    }
11255  }
11256
11257  function genInlineTemplate (el, state) {
11258    var ast = el.children[0];
11259    if (el.children.length !== 1 || ast.type !== 1) {
11260      state.warn(
11261        'Inline-template components must have exactly one child element.',
11262        { start: el.start }
11263      );
11264    }
11265    if (ast && ast.type === 1) {
11266      var inlineRenderFns = generate(ast, state.options);
11267      return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
11268    }
11269  }
11270
11271  function genScopedSlots (
11272    el,
11273    slots,
11274    state
11275  ) {
11276    // by default scoped slots are considered "stable", this allows child
11277    // components with only scoped slots to skip forced updates from parent.
11278    // but in some cases we have to bail-out of this optimization
11279    // for example if the slot contains dynamic names, has v-if or v-for on them...
11280    var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
11281      var slot = slots[key];
11282      return (
11283        slot.slotTargetDynamic ||
11284        slot.if ||
11285        slot.for ||
11286        containsSlotChild(slot) // is passing down slot from parent which may be dynamic
11287      )
11288    });
11289
11290    // #9534: if a component with scoped slots is inside a conditional branch,
11291    // it's possible for the same component to be reused but with different
11292    // compiled slot content. To avoid that, we generate a unique key based on
11293    // the generated code of all the slot contents.
11294    var needsKey = !!el.if;
11295
11296    // OR when it is inside another scoped slot or v-for (the reactivity may be
11297    // disconnected due to the intermediate scope variable)
11298    // #9438, #9506
11299    // TODO: this can be further optimized by properly analyzing in-scope bindings
11300    // and skip force updating ones that do not actually use scope variables.
11301    if (!needsForceUpdate) {
11302      var parent = el.parent;
11303      while (parent) {
11304        if (
11305          (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
11306          parent.for
11307        ) {
11308          needsForceUpdate = true;
11309          break
11310        }
11311        if (parent.if) {
11312          needsKey = true;
11313        }
11314        parent = parent.parent;
11315      }
11316    }
11317
11318    var generatedSlots = Object.keys(slots)
11319      .map(function (key) { return genScopedSlot(slots[key], state); })
11320      .join(',');
11321
11322    return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,fal

11322se," + (hash(generatedSlots))) : "") + ")")
11323  }
11324
11325  function hash(str) {
11326    var hash = 5381;
11327    var i = str.length;
11328    while(i) {
11329      hash = (hash * 33) ^ str.charCodeAt(--i);
11330    }
11331    return hash >>> 0
11332  }
11333
11334  function containsSlotChild (el) {
11335    if (el.type === 1) {
11336      if (el.tag === 'slot') {
11337        return true
11338      }
11339      return el.children.some(containsSlotChild)
11340    }
11341    return false
11342  }
11343
11344  function genScopedSlot (
11345    el,
11346    state
11347  ) {
11348    var isLegacySyntax = el.attrsMap['slot-scope'];
11349    if (el.if && !el.ifProcessed && !isLegacySyntax) {
11350      return genIf(el, state, genScopedSlot, "null")
11351    }
11352    if (el.for && !el.forProcessed) {
11353      return genFor(el, state, genScopedSlot)
11354    }
11355    var slotScope = el.slotScope === emptySlotScopeToken
11356      ? ""
11357      : String(el.slotScope);
11358    var fn = "function(" + slotScope + "){" +
11359      "return " + (el.tag === 'template'
11360        ? el.if && isLegacySyntax
11361          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
11362          : genChildren(el, state) || 'undefined'
11363        : genElement(el, state)) + "}";
11364    // reverse proxy v-slot without scope on this.$slots
11365    var reverseProxy = slotScope ? "" : ",proxy:true";
11366    return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
11367  }
11368
11369  function genChildren (
11370    el,
11371    state,
11372    checkSkip,
11373    altGenElement,
11374    altGenNode
11375  ) {
11376    var children = el.children;
11377    if (children.length) {
11378      var el$1 = children[0];
11379      // optimize single v-for
11380      if (children.length === 1 &&
11381        el$1.for &&
11382        el$1.tag !== 'template' &&
11383        el$1.tag !== 'slot'
11384      ) {
11385        var normalizationType = checkSkip
11386          ? state.maybeComponent(el$1) ? ",1" : ",0"
11387          : "";
11388        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
11389      }
11390      var normalizationType$1 = checkSkip
11391        ? getNormalizationType(children, state.maybeComponent)
11392        : 0;
11393      var gen = altGenNode || genNode;
11394      return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
11395    }
11396  }
11397
11398  // determine the normalization needed for the children array.
11399  // 0: no normalization needed
11400  // 1: simple normalization needed (possible 1-level deep nested array)
11401  // 2: full normalization needed
11402  function getNormalizationType (
11403    children,
11404    maybeComponent
11405  ) {
11406    var res = 0;
11407    for (var i = 0; i < children.length; i++) {
11408      var el = children[i];
11409      if (el.type !== 1) {
11410        continue
11411      }
11412      if (needsNormalization(el) ||
11413          (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
11414        res = 2;
11415        break
11416      }
11417      if (maybeComponent(el) ||
11418          (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
11419        res = 1;
11420      }
11421    }
11422    return res
11423  }
11424
11425  function needsNormalization (el) {
11426    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
11427  }
11428
11429  function genNode (node, state) {
11430    if (node.type === 1) {
11431      return genElement(node, state)
11432    } else if (node.type === 3 && node.isComment) {
11433      return genComment(node)
11434    } else {
11435      return genText(node)
11436    }
11437  }
11438
11439  function genText (text) {
11440    return ("_v(" + (text.type === 2
11441      ? text.expression // no need for () because already wrapped in _s()
11442      : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
11443  }
11444
11445  function genComment (comment) {
11446    return ("_e(" + (JSON.stringify(comment.text)) + ")")
11447  }
11448
11449  function genSlot (el, state) {
11450    var slotName = el.slotName || '"default"';
11451    var children = genChildren(el, state);
11452    var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
11453    var attrs = el.attrs || el.dynamicAttrs
11454      ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
11455          // slot props are camelized
11456          name: camelize(attr.name),
11457          value: attr.value,
11458          dynamic: attr.dynamic
11459        }); }))
11460      : null;
11461    var bind$$1 = el.attrsMap['v-bind'];
11462    if ((attrs || bind$$1) && !children) {
11463      res += ",null";
11464    }
11465    if (attrs) {
11466      res += "," + attrs;
11467    }
11468    if (bind$$1) {
11469      res += (attrs ? '' : ',null') + "," + bind$$1;
11470    }
11471    return res + ')'
11472  }
11473
11474  // componentName is el.component, take it as argument to shun flow's pessimistic refinement
11475  function genComponent (
11476    componentName,
11477    el,
11478    state
11479  ) {
11480    var children = el.inlineTemplate ? null : genChildren(el, state, true);
11481    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
11482  }
11483
11484  function genProps (props) {
11485    var staticProps = "";
11486    var dynamicProps = "";
11487    for (var i = 0; i < props.length; i++) {
11488      var prop = props[i];
11489      var value = transformSpecialNewlines(prop.value);
11490      if (prop.dynamic) {
11491        dynamicProps += (prop.name) + "," + value + ",";
11492      } else {
11493        staticProps += "\"" + (prop.name) + "\":" + value + ",";
11494      }
11495    }
11496    staticProps = "{" + (staticProps.slice(0, -1)) + "}";
11497    if (dynamicProps) {
11498      return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
11499    } else {
11500      return staticProps
11501    }
11502  }
11503
11504  // #3895, #4268
11505  function transformSpecialNewlines (text) {
11506    return text
11507      .replace(/\u2028/g, '\\u2028')
11508      .replace(/\u2029/g, '\\u2029')
11509  }
11510
11511  /*  */
11512
11513
11514
11515  // these keywords should not appear inside expressions, but operators like
11516  // typeof, instanceof and in are allowed
11517  var prohibitedKeywordRE = new RegExp('\\b' + (
11518    'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
11519    'super,throw,while,yield,delete,export,import,return,switch,default,' +
11520    'extends,finally,continue,debugger,function,arguments'
11521  ).split(',').join('\\b|\\b') + '\\b');
11522
11523  // these unary operators should not be used as property/method names
11524  var unaryOperatorsRE = new RegExp('\\b' + (
11525    'delete,typeof,void'
11526  ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
11527
11528  // strip strings in expressions
11529  var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
11530
11531  // detect problematic expressions in a template
11532  function detectErrors (ast, warn) {
11533    if (ast) {
11534      checkNode(ast, warn);
11535    }
11536  }
11537
11538  function checkNode (node, warn) {
11539    if (node.type === 1) {
11540      for (var name in node.attrsMap) {
11541        if (dirRE.test(name)) {
11542          var value = node.attrsMap[name];
11543          if (value) {
11544            var range = node.rawAttrsMap[name];
11545            if (name === 'v-for') {
11546              checkFor(node, ("v-for=\"" + value + "\""), warn, range);
11547            } else if (name === 'v-slot' || name[0] === '#') {
11548              checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
11549            } else if (onRE.test(name)) {
11550              checkEvent(value, (name + "=\"" + value + "\""), warn, range);
11551            } else {
11552              checkExpression(value, (name + "=\"" + value + "\""), warn, range);
11553            }
11554          }
11555        }
11556      }
11557      if (node.children) {
11558        for (var i = 0; i < node.children.length; i++) {
11559          checkNode(node.children[i], warn);
11560        }
11561      }
11562    } else if (node.type === 2) {
11563      checkExpression(node.expression, node.text, warn, node);
11564    }
11565  }
11566
11567  function checkEvent (exp, text, warn, range) {
11568    var stripped = exp.replace(stripStringRE, '');
11569    var keywordMatch = stripped.match(unaryOperatorsRE);
11570    if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
11571      warn(
11572        "avoid using JavaScript unary operator as property name: " +
11573        "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
11574        range
11575      );
11576    }
11577    checkExpression(exp, text, warn, range);
11578  }
11579
11580  function checkFor (node, text, warn, range) {
11581    checkExpression(node.for || '', text, warn, range);
11582    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
11583    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
11584    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
11585  }
11586
11587  function checkIdentifier (
11588    ident,
11589    type,
11590    text,
11591    warn,
11592    range
11593  ) {
11594    if (typeof ident === 'string') {

11595      try {
11596        new Function(("var " + ident + "=_"));
11597      } catch (e) {
11598        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
11599      }
11600    }
11601  }
11602
11603  function checkExpression (exp, text, warn, range) {
11604    try {
11605      new Function(("return " + exp));
11606    } catch (e) {
11607      var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
11608      if (keywordMatch) {
11609        warn(
11610          "avoid using JavaScript keyword as property name: " +
11611          "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
11612          range
11613        );
11614      } else {
11615        warn(
11616          "invalid expression: " + (e.message) + " in\n\n" +
11617          "    " + exp + "\n\n" +
11618          "  Raw expression: " + (text.trim()) + "\n",
11619          range
11620        );
11621      }
11622    }
11623  }
11624
11625  function checkFunctionParameterExpression (exp, text, warn, range) {
11626    try {
11627      new Function(exp, '');
11628    } catch (e) {
11629      warn(
11630        "invalid function parameter expression: " + (e.message) + " in\n\n" +
11631        "    " + exp + "\n\n" +
11632        "  Raw expression: " + (text.trim()) + "\n",
11633        range
11634      );
11635    }
11636  }
11637
11638  /*  */
11639
11640  var range = 2;
11641
11642  function generateCodeFrame (
11643    source,
11644    start,
11645    end
11646  ) {
11647    if ( start === void 0 ) start = 0;
11648    if ( end === void 0 ) end = source.length;
11649
11650    var lines = source.split(/\r?\n/);
11651    var count = 0;
11652    var res = [];
11653    for (var i = 0; i < lines.length; i++) {
11654      count += lines[i].length + 1;
11655      if (count >= start) {
11656        for (var j = i - range; j <= i + range || end > count; j++) {
11657          if (j < 0 || j >= lines.length) { continue }
11658          res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
11659          var lineLength = lines[j].length;
11660          if (j === i) {
11661            // push underline
11662            var pad = start - (count - lineLength) + 1;
11663            var length = end > count ? lineLength - pad : end - start;
11664            res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
11665          } else if (j > i) {
11666            if (end > count) {
11667              var length$1 = Math.min(end - count, lineLength);
11668              res.push("   |  " + repeat$1("^", length$1));
11669            }
11670            count += lineLength + 1;
11671          }
11672        }
11673        break
11674      }
11675    }
11676    return res.join('\n')
11677  }
11678
11679  function repeat$1 (str, n) {
11680    var result = '';
11681    if (n > 0) {
11682      while (true) { // eslint-disable-line
11683        if (n & 1) { result += str; }
11684        n >>>= 1;
11685        if (n <= 0) { break }
11686        str += str;
11687      }
11688    }
11689    return result
11690  }
11691
11692  /*  */
11693
11694
11695
11696  function createFunction (code, errors) {
11697    try {
11698      return new Function(code)
11699    } catch (err) {
11700      errors.push({ err: err, code: code });
11701      return noop
11702    }
11703  }
11704
11705  function createCompileToFunctionFn (compile) {
11706    var cache = Object.create(null);
11707
11708    return function compileToFunctions (
11709      template,
11710      options,
11711      vm
11712    ) {
11713      options = extend({}, options);
11714      var warn$$1 = options.warn || warn;
11715      delete options.warn;
11716
11717      /* istanbul ignore if */
11718      {
11719        // detect possible CSP restriction
11720        try {
11721          new Function('return 1');
11722        } catch (e) {
11723          if (e.toString().match(/unsafe-eval|CSP/)) {
11724            warn$$1(
11725              'It seems you are using the standalone build of Vue.js in an ' +
11726              'environment with Content Security Policy that prohibits unsafe-eval. ' +
11727              'The template compiler cannot work in this environment. Consider ' +
11728              'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
11729              'templates into render functions.'
11730            );
11731          }
11732        }
11733      }
11734
11735      // check cache
11736      var key = options.delimiters
11737        ? String(options.delimiters) + template
11738        : template;
11739      if (cache[key]) {
11740        return cache[key]
11741      }
11742
11743      // compile
11744      var compiled = compile(template, options);
11745
11746      // check compilation errors/tips
11747      {
11748        if (compiled.errors && compiled.errors.length) {
11749          if (options.outputSourceRange) {

11750            compiled.errors.forEach(function (e) {
11751              warn$$1(
11752                "Error compiling template:\n\n" + (e.msg) + "\n\n" +
11753                generateCodeFrame(template, e.start, e.end),
11754                vm
11755              );
11756            });
11757          } else {
11758            warn$$1(
11759              "Error compiling template:\n\n" + template + "\n\n" +
11760              compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
11761              vm
11762            );
11763          }
11764        }
11765        if (compiled.tips && compiled.tips.length) {
11766          if (options.outputSourceRange) {
11767            compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
11768          } else {
11769            compiled.tips.forEach(function (msg) { return tip(msg, vm); });
11770          }
11771        }
11772      }
11773
11774      // turn code into functions
11775      var res = {};
11776      var fnGenErrors = [];
11777      res.render = createFunction(compiled.render, fnGenErrors);
11778      res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
11779        return createFunction(code, fnGenErrors)
11780      });
11781
11782      // check function generation errors.
11783      // this should only happen if there is a bug in the compiler itself.
11784      // mostly for codegen development use
11785      /* istanbul ignore if */
11786      {
11787        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
11788          warn$$1(
11789            "Failed to generate render function:\n\n" +
11790            fnGenErrors.map(function (ref) {
11791              var err = ref.err;
11792              var code = ref.code;
11793
11794              return ((err.toString()) + " in\n\n" + code + "\n");
11795          }).join('\n'),
11796            vm
11797          );
11798        }
11799      }
11800
11801      return (cache[key] = res)
11802    }
11803  }
11804
11805  /*  */
11806
11807  function createCompilerCreator (baseCompile) {
11808    return function createCompiler (baseOptions) {
11809      function compile (
11810        template,
11811        options
11812      ) {
11813        var finalOptions = Object.create(baseOptions);
11814        var errors = [];
11815        var tips = [];
11816
11817        var warn = function (msg, range, tip) {
11818          (tip ? tips : errors).push(msg);
11819        };
11820
11821        if (options) {
11822          if (options.outputSourceRange) {
11823            // $flow-disable-line
11824            var leadingSpaceLength = template.match(/^\s*/)[0].length;
11825
11826            warn = function (msg, range, tip) {
11827              var data = { msg: msg };
11828              if (range) {
11829                if (range.start != null) {
11830                  data.start = range.start + leadingSpaceLength;
11831                }
11832                if (range.end != null) {
11833                  data.end = range.end + leadingSpaceLength;
11834                }
11835              }
11836              (tip ? tips : errors).push(data);
11837            };
11838          }
11839          // merge custom modules
11840          if (options.modules) {
11841            finalOptions.modules =
11842              (baseOptions.modules || []).concat(options.modules);
11843          }
11844          // merge custom directives
11845          if (options.directives) {
11846            finalOptions.directives = extend(
11847              Object.create(baseOptions.directives || null),
11848              options.directives
11849            );
11850          }
11851          // copy other options
11852          for (var key in options) {
11853            if (key !== 'modules' && key !== 'directives') {
11854              finalOptions[key] = options[key];
11855            }
11856          }
11857        }
11858
11859        finalOptions.warn = warn;
11860
11861        var compiled = baseCompile(template.trim(), finalOptions);
11862        {
11863          detectErrors(compiled.ast, warn);
11864        }
11865        compiled.errors = errors;
11866        compiled.tips = tips;
11867        return compiled
11868      }
11869
11870      return {
11871        compile: compile,
11872        compileToFunctions: createCompileToFunctionFn(compile)
11873      }
11874    }
11875  }
11876
11877  /*  */
11878
11879  // `createCompilerCreator` allows creating compilers that use alternative
11880  // parser/optimizer/codegen, e.g the SSR optimizing compiler.
11881  // Here we just export a default compiler using the default parts.
11882  var createCompiler = createCompilerCreator(function baseCompile (
11883    template,
11884    options
11885  ) {
11886    var ast = parse(template.trim(), options);
11887    if (options.optimize !== false) {
11888      optimize(ast, options);
11889    }
11890    var code = generate(ast, options);
11891    return {
11892      ast: ast,
11893      render: code.render,
11894      staticRenderFns: code.staticRenderFns
11895    }
11896  });
11897
11898  /*  */
11899
11900  var ref$1 = createCompiler(baseOptions);
11901  var compile = ref$1.compile;
11902  var compileToFunctions = ref$1.compileToFunctions;
11903
11904  /*  */
11905
11906  // check whether current browser encodes a char inside attribute values
11907  var div;
11908  function getShouldDecode (href) {
11909    div = div || document.createElement('div');
11910    div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
11911    return div.innerHTML.indexOf('&#10;') > 0
11912  }
11913
11914  // #3663: IE encodes newlines inside attribute values while other browsers don't
11915  var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;

11916  // #6828: chrome encodes content in a[href]
11917  var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
11918
11919  /*  */
11920
11921  var idToTemplate = cached(function (id) {
11922    var el = query(id);
11923    return el && el.innerHTML
11924  });
11925
11926  var mount = Vue.prototype.$mount;
11927  Vue.prototype.$mount = function (
11928    el,
11929    hydrating
11930  ) {
11931    el = el && query(el);
11932
11933    /* istanbul ignore if */
11934    if (el === document.body || el === document.documentElement) {
11935      warn(
11936        "Do not mount Vue to <html> or <body> - mount to normal elements instead."
11937      );
11938      return this
11939    }
11940
11941    var options = this.$options;
11942    // resolve template/el and convert to render function
11943    if (!options.render) {
11944      var template = options.template;
11945      if (template) {
11946        if (typeof template === 'string') {
11947          if (template.charAt(0) === '#') {
11948            template = idToTemplate(template);
11949            /* istanbul ignore if */
11950            if (!template) {
11951              warn(
11952                ("Template element not found or is empty: " + (options.template)),
11953                this
11954              );
11955            }
11956          }
11957        } else if (template.nodeType) {
11958          template = template.innerHTML;
11959        } else {
11960          {
11961            warn('invalid template option:' + template, this);
11962          }
11963          return this
11964        }
11965      } else if (el) {
11966        template = getOuterHTML(el);
11967      }
11968      if (template) {
11969        /* istanbul ignore if */
11970        if (config.performance && mark) {
11971          mark('compile');
11972        }
11973
11974        var ref = compileToFunctions(template, {
11975          outputSourceRange: "development" !== 'production',
11976          shouldDecodeNewlines: shouldDecodeNewlines,
11977          shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
11978          delimiters: options.delimiters,
11979          comments: options.comments
11980        }, this);
11981        var render = ref.render;
11982        var staticRenderFns = ref.staticRenderFns;
11983        options.render = render;
11984        options.staticRenderFns = staticRenderFns;
11985
11986        /* istanbul ignore if */
11987        if (config.performance && mark) {
11988          mark('compile end');
11989          measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
11990        }
11991      }
11992    }
11993    return mount.call(this, el, hydrating)
11994  };
11995
11996  /**
11997   * Get outerHTML of elements, taking care
11998   * of SVG elements in IE as well.
11999   */
12000  function getOuterHTML (el) {
12001    if (el.outerHTML) {
12002      return el.outerHTML
12003    } else {
12004      var container = document.createElement('div');
12005      container.appendChild(el.cloneNode(true));
12006      return container.innerHTML
12007    }
12008  }
12009
12010  Vue.compile = compileToFunctions;
12011
12012  return Vue;
12013
12014}));