https://app.mirrorar.io/assets/js/vue.js

1/*!
2 * Vue.js v2.6.10
3 * (c) 2014-2019 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]);
1708        expectedTypes.push(assertedType.expectedType || '');
1709        valid = assertedType.valid;
1710      }
1711    }
1712
1713    if (!valid) {
1714      warn(
1715        getInvalidTypeMessage(name, value, expectedTypes),
1716        vm
1717      );
1718      return
1719    }
1720    var validator = prop.validator;
1721    if (validator) {
1722      if (!validator(value)) {
1723        warn(
1724          'Invalid prop: custom validator check failed for prop "' + name + '".',
1725          vm
1726        );
1727      }
1728    }
1729  }
1730
1731  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
1732
1733  function assertType (value, type) {
1734    var valid;
1735    var expectedType = getType(type);
1736    if (simpleCheckRE.test(expectedType)) {
1737      var t = typeof value;
1738      valid = t === expectedType.toLowerCase();
1739      // for primitive wrapper objects
1740      if (!valid && t === 'object') {
1741        valid = value instanceof type;
1742      }
1743    } else if (expectedType === 'Object') {
1744      valid = isPlainObject(value);
1745    } else if (expectedType === 'Array') {
1746      valid = Array.isArray(value);
1747    } else {
1748      valid = value instanceof type;
1749    }
1750    return {
1751      valid: valid,
1752      expectedType: expectedType
1753    }
1754  }
1755
1756  /**
1757   * Use function string name to check built-in types,
1758   * because a simple equality check will fail when running
1759   * across different vms / iframes.
1760   */
1761  function getType (fn) {
1762    var match = fn && fn.toString().match(/^\s*function (\w+)/);
1763    return match ? match[1] : ''
1764  }
1765
1766  function isSameType (a, b) {
1767    return getType(a) === getType(b)
1768  }
1769
1770  function getTypeIndex (type, expectedTypes) {
1771    if (!Array.isArray(expectedTypes)) {
1772      return isSameType(expectedTypes, type) ? 0 : -1
1773    }
1774    for (var i = 0, len = expectedTypes.length; i < len; i++) {
1775      if (isSameType(expectedTypes[i], type)) {
1776        return i
1777      }
1778    }
1779    return -1
1780  }
1781
1782  function getInvalidTypeMessage (name, value, expectedTypes) {
1783    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
1784      " Expected " + (expectedTypes.map(capitalize).join(', '));
1785    var expectedType = expectedTypes[0];
1786    var receivedType = toRawType(value);
1787    var expectedValue = styleValue(value, expectedType);
1788    var receivedValue = styleValue(value, receivedType);
1789    // check if we need to specify expected value
1790    if (expectedTypes.length === 1 &&
1791        isExplicable(expectedType) &&
1792        !isBoolean(expectedType, receivedType)) {
1793      message += " with value " + expectedValue;
1794    }
1795    message += ", got " + receivedType + " ";
1796    // check if we need to specify received value
1797    if (isExplicable(receivedType)) {
1798      message += "with value " + receivedValue + ".";
1799    }
1800    return message
1801  }
1802
1803  function styleValue (value, type) {
1804    if (type === 'String') {
1805      return ("\"" + value + "\"")
1806    } else if (type === 'Number') {
1807      return ("" + (Number(value)))
1808    } else {
1809      return ("" + value)
1810    }
1811  }
1812
1813  function isExplicable (value) {
1814    var explicitTypes = ['string', 'number', 'boolean'];
1815    return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
1816  }
1817
1818  function isBoolean () {
1819    var args = [], len = arguments.length;
1820    while ( len-- ) args[ len ] = arguments[ len ];
1821
1822    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
1823  }
1824
1825  /*  */
1826
1827  function handleError (err, vm, info) {
1828    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
1829    // See: https://github.com/vuejs/vuex/issues/1505
1830    pushTarget();
1831    try {
1832      if (vm) {
1833        var cur = vm;
1834        while ((cur = cur.$parent)) {
1835          var hooks = cur.$options.errorCaptured;
1836          if (hooks) {
1837            for (var i = 0; i < hooks.length; i++) {
1838              try {
1839                var capture = hooks[i].call(cur, err, vm, info) === false;
1840                if (capture) { return }
1841              } catch (e) {
1842                globalHandleError(e, cur, 'errorCaptured hook');
1843              }
1844            }
1845          }
1846        }
1847      }
1848      globalHandleError(err, vm, info);
1849    } finally {
1850      popTarget();
1851    }
1852  }
1853
1854  function invokeWithErrorHandling (
1855    handler,
1856    context,
1857    args,
1858    vm,
1859    info
1860  ) {
1861    var res;
1862    try {

1863      res = args ? handler.apply(context, args) : handler.call(context);
1864      if (res && !res._isVue && isPromise(res) && !res._handled) {
1865        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
1866        // issue #9511
1867        // avoid catch triggering multiple times when nested calls
1868        res._handled = true;
1869      }
1870    } catch (e) {
1871      handleError(e, vm, info);
1872    }
1873    return res
1874  }
1875
1876  function globalHandleError (err, vm, info) {
1877    if (config.errorHandler) {
1878      try {
1879        return config.errorHandler.call(null, err, vm, info)
1880      } catch (e) {
1881        // if the user intentionally throws the original error in the handler,
1882        // do not log it twice
1883        if (e !== err) {
1884          logError(e, null, 'config.errorHandler');
1885        }
1886      }
1887    }
1888    logError(err, vm, info);
1889  }
1890
1891  function logError (err, vm, info) {
1892    {
1893      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
1894    }
1895    /* istanbul ignore else */
1896    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
1897      console.error(err);
1898    } else {
1899      throw err
1900    }
1901  }
1902
1903  /*  */
1904
1905  var isUsingMicroTask = false;
1906
1907  var callbacks = [];
1908  var pending = false;
1909
1910  function flushCallbacks () {
1911    pending = false;
1912    var copies = callbacks.slice(0);
1913    callbacks.length = 0;
1914    for (var i = 0; i < copies.length; i++) {
1915      copies[i]();
1916    }
1917  }
1918
1919  // Here we have async deferring wrappers using microtasks.
1920  // In 2.5 we used (macro) tasks (in combination with microtasks).
1921  // However, it has subtle problems when state is changed right before repaint
1922  // (e.g. #6813, out-in transitions).
1923  // Also, using (macro) tasks in event handler would cause some weird behaviors
1924  // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
1925  // So we now use microtasks everywhere, again.
1926  // A major drawback of this tradeoff is that there are some scenarios
1927  // where microtasks have too high a priority and fire in between supposedly
1928  // sequential events (e.g. #4521, #6690, which have workarounds)
1929  // or even between bubbling of the same event (#6566).
1930  var timerFunc;
1931
1932  // The nextTick behavior leverages the microtask queue, which can be accessed
1933  // via either native Promise.then or MutationObserver.
1934  // MutationObserver has wider support, however it is seriously bugged in
1935  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
1936  // completely stops working after triggering a few times... so, if native
1937  // Promise is available, we will use it:
1938  /* istanbul ignore next, $flow-disable-line */
1939  if (typeof Promise !== 'undefined' && isNative(Promise)) {
1940    var p = Promise.resolve();
1941    timerFunc = function () {
1942      p.then(flushCallbacks);
1943      // In problematic UIWebViews, Promise.then doesn't completely break, but
1944      // it can get stuck in a weird state where callbacks are pushed into the
1945      // microtask queue but the queue isn't being flushed, until the browser
1946      // needs to do some other work, e.g. handle a timer. Therefore we can
1947      // "force" the microtask queue to be flushed by adding an empty timer.
1948      if (isIOS) { setTimeout(noop); }
1949    };
1950    isUsingMicroTask = true;
1951  } else if (!isIE && typeof MutationObserver !== 'undefined' && (
1952    isNative(MutationObserver) ||
1953    // PhantomJS and iOS 7.x
1954    MutationObserver.toString() === '[object MutationObserverConstructor]'
1955  )) {
1956    // Use MutationObserver where native Promise is not available,
1957    // e.g. PhantomJS, iOS7, Android 4.4
1958    // (#6466 MutationObserver is unreliable in IE11)
1959    var counter = 1;
1960    var observer = new MutationObserver(flushCallbacks);
1961    var textNode = document.createTextNode(String(counter));
1962    observer.observe(textNode, {
1963      characterData: true
1964    });
1965    timerFunc = function () {
1966      counter = (counter + 1) % 2;
1967      textNode.data = String(counter);
1968    };
1969    isUsingMicroTask = true;
1970  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
1971    // Fallback to setImmediate.
1972    // Techinically it leverages the (macro) task queue,
1973    // but it is still a better choice than setTimeout.

1974    timerFunc = function () {
1975      setImmediate(flushCallbacks);
1976    };
1977  } else {
1978    // Fallback to setTimeout.
1979    timerFunc = function () {
1980      setTimeout(flushCallbacks, 0);
1981    };
1982  }
1983
1984  function nextTick (cb, ctx) {
1985    var _resolve;
1986    callbacks.push(function () {
1987      if (cb) {
1988        try {
1989          cb.call(ctx);
1990        } catch (e) {
1991          handleError(e, ctx, 'nextTick');
1992        }
1993      } else if (_resolve) {
1994        _resolve(ctx);
1995      }
1996    });
1997    if (!pending) {
1998      pending = true;
1999      timerFunc();
2000    }
2001    // $flow-disable-line
2002    if (!cb && typeof Promise !== 'undefined') {
2003      return new Promise(function (resolve) {
2004        _resolve = resolve;
2005      })
2006    }
2007  }
2008
2009  /*  */
2010
2011  var mark;
2012  var measure;
2013
2014  {
2015    var perf = inBrowser && window.performance;
2016    /* istanbul ignore if */
2017    if (
2018      perf &&
2019      perf.mark &&
2020      perf.measure &&
2021      perf.clearMarks &&
2022      perf.clearMeasures
2023    ) {
2024      mark = function (tag) { return perf.mark(tag); };
2025      measure = function (name, startTag, endTag) {
2026        perf.measure(name, startTag, endTag);
2027        perf.clearMarks(startTag);
2028        perf.clearMarks(endTag);
2029        // perf.clearMeasures(name)
2030      };
2031    }
2032  }
2033
2034  /* not type checking this file because flow doesn't play well with Proxy */
2035
2036  var initProxy;
2037
2038  {
2039    var allowedGlobals = makeMap(
2040      'Infinity,undefined,NaN,isFinite,isNaN,' +
2041      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
2042      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
2043      'require' // for Webpack/Browserify
2044    );
2045
2046    var warnNonPresent = function (target, key) {
2047      warn(
2048        "Property or method \"" + key + "\" is not defined on the instance but " +
2049        'referenced during render. Make sure that this property is reactive, ' +
2050        'either in the data option, or for class-based components, by ' +
2051        'initializing the property. ' +
2052        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
2053        target
2054      );
2055    };
2056
2057    var warnReservedPrefix = function (target, key) {
2058      warn(
2059        "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
2060        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
2061        'prevent conflicts with Vue internals' +
2062        'See: https://vuejs.org/v2/api/#data',
2063        target
2064      );
2065    };
2066
2067    var hasProxy =
2068      typeof Proxy !== 'undefined' && isNative(Proxy);
2069
2070    if (hasProxy) {
2071      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
2072      config.keyCodes = new Proxy(config.keyCodes, {
2073        set: function set (target, key, value) {
2074          if (isBuiltInModifier(key)) {
2075            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
2076            return false
2077          } else {
2078            target[key] = value;
2079            return true
2080          }
2081        }
2082      });
2083    }
2084
2085    var hasHandler = {
2086      has: function has (target, key) {
2087        var has = key in target;
2088        var isAllowed = allowedGlobals(key) ||
2089          (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
2090        if (!has && !isAllowed) {
2091          if (key in target.$data) { warnReservedPrefix(target, key); }
2092          else { warnNonPresent(target, key); }
2093        }
2094        return has || !isAllowed
2095      }
2096    };
2097
2098    var getHandler = {
2099      get: function get (target, key) {
2100        if (typeof key === 'string' && !(key in target)) {
2101          if (key in target.$data) { warnReservedPrefix(target, key); }
2102          else { warnNonPresent(target, key); }
2103        }
2104        return target[key]
2105      }
2106    };
2107
2108    initProxy = function initProxy (vm) {
2109      if (hasProxy) {
2110        // determine which proxy handler to use
2111        var options = vm.$options;
2112        var handlers = options.render && options.render._withStripped
2113          ? getHandler
2114          : hasHandler;
2115        vm._renderProxy = new Proxy(vm, handlers);
2116      } else {
2117        vm._renderProxy = vm;
2118      }
2119    };
2120  }
2121
2122  /*  */
2123
2124  var seenObjects = new _Set();
2125
2126  /**
2127   * Recursively traverse an object to evoke all converted
2128   * getters, so that every nested property inside the object
2129   * is collected as a "deep" dependency.
2130   */
2131  function traverse (val) {
2132    _traverse(val, seenObjects);
2133    seenObjects.clear();
2134  }
2135
2136  function _traverse (val, seen) {
2137    var i, keys;
2138    var isA = Array.isArray(val);
2139    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
2140      return
2141    }
2142    if (val.__ob__) {
2143      var depId = val.__ob__.dep.id;
2144      if (seen.has(depId)) {
2145        return
2146      }
2147      seen.add(depId);
2148    }
2149    if (isA) {
2150      i = val.length;
2151      while (i--) { _traverse(val[i], seen); }
2152    } else {
2153      keys = Object.keys(val);
2154      i = keys.length;
2155      while (i--) { _traverse(val[keys[i]], seen); }
2156    }
2157  }
2158
2159  /*  */
2160
2161  var normalizeEvent = cached(function (name) {
2162    var passive = name.charAt(0) === '&';
2163    name = passive ? name.slice(1) : name;
2164    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
2165    name = once$$1 ? name.slice(1) : name;
2166    var capture = name.charAt(0) === '!';
2167    name = capture ? name.slice(1) : name;
2168    return {
2169      name: name,
2170      once: once$$1,
2171      capture: capture,
2172      passive: passive
2173    }
2174  });
2175
2176  function createFnInvoker (fns, vm) {
2177    function invoker () {
2178      var arguments$1 = arguments;
2179
2180      var fns = invoker.fns;
2181      if (Array.isArray(fns)) {
2182        var cloned = fns.slice();
2183        for (var i = 0; i < cloned.length; i++) {
2184          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
2185        }
2186      } else {
2187        // return handler return value for single handlers
2188        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
2189      }
2190    }
2191    invoker.fns = fns;
2192    return invoker
2193  }
2194
2195  function updateListeners (
2196    on,
2197    oldOn,
2198    add,
2199    remove$$1,
2200    createOnceHandler,
2201    vm
2202  ) {
2203    var name, def$$1, cur, old, event;
2204    for (name in on) {
2205      def$$1 = cur = on[name];
2206      old = oldOn[name];
2207      event = normalizeEvent(name);
2208      if (isUndef(cur)) {
2209        warn(
2210          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
2211          vm
2212        );
2213      } else if (isUndef(old)) {
2214        if (isUndef(cur.fns)) {
2215          cur = on[name] = createFnInvoker(cur, vm);
2216        }
2217        if (isTrue(event.once)) {
2218          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
2219        }
2220        add(event.name, cur, event.capture, event.passive, event.params);
2221      } else if (cur !== old) {
2222        old.fns = cur;
2223        on[name] = old;
2224      }
2225    }
2226    for (name in oldOn) {
2227      if (isUndef(on[name])) {
2228        event = normalizeEvent(name);
2229        remove$$1(event.name, oldOn[name], event.capture);
2230      }
2231    }
2232  }
2233
2234  /*  */
2235
2236  function mergeVNodeHook (def, hookKey, hook) {
2237    if (def instanceof VNode) {
2238      def = def.data.hook || (def.data.hook = {});
2239    }
2240    var invoker;
2241    var oldHook = def[hookKey];
2242
2243    function wrappedHook () {
2244      hook.apply(this, arguments);
2245      // important: remove merged hook to ensure it's called only once
2246      // and prevent memory leak
2247      remove(invoker.fns, wrappedHook);
2248    }
2249
2250    if (isUndef(oldHook)) {
2251      // no existing hook
2252      invoker = createFnInvoker([wrappedHook]);
2253    } else {
2254      /* istanbul ignore if */
2255      if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
2256        // already a merged invoker
2257        invoker = oldHook;
2258        invoker.fns.push(wrappedHook);
2259      } else {
2260        // existing plain hook
2261        invoker = createFnInvoker([oldHook, wrappedHook]);
2262      }
2263    }
2264
2265    invoker.merged = true;
2266    def[hookKey] = invoker;
2267  }
2268
2269  /*  */
2270
2271  function extractPropsFromVNodeData (
2272    data,
2273    Ctor,
2274    tag
2275  ) {
2276    // we are only extracting raw values here.
2277    // validation and default values are handled in the child
2278    // component itself.
2279    var propOptions = Ctor.options.props;
2280    if (isUndef(propOptions)) {
2281      return
2282    }
2283    var res = {};
2284    var attrs = data.attrs;
2285    var props = data.props;
2286    if (isDef(attrs) || isDef(props)) {
2287      for (var key in propOptions) {
2288        var altKey = hyphenate(key);
2289        {
2290          var keyInLowerCase = key.toLowerCase();
2291          if (
2292            key !== keyInLowerCase &&
2293            attrs && hasOwn(attrs, keyInLowerCase)
2294          ) {
2295            tip(
2296              "Prop \"" + keyInLowerCase + "\" is passed to component " +
2297              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
2298              " \"" + key + "\". " +
2299              "Note that HTML attributes are case-insensitive and camelCased " +
2300              "props need to use their kebab-case equivalents when using in-DOM " +
2301              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
2302            );
2303          }
2304        }
2305        checkProp(res, props, key, altKey, true) ||
2306        checkProp(res, attrs, key, altKey, false);
2307      }
2308    }
2309    return res
2310  }
2311
2312  function checkProp (
2313    res,
2314    hash,
2315    key,
2316    altKey,
2317    preserve
2318  ) {

2319    if (isDef(hash)) {
2320      if (hasOwn(hash, key)) {
2321        res[key] = hash[key];
2322        if (!preserve) {
2323          delete hash[key];
2324        }
2325        return true
2326      } else if (hasOwn(hash, altKey)) {
2327        res[key] = hash[altKey];
2328        if (!preserve) {
2329          delete hash[altKey];
2330        }
2331        return true
2332      }
2333    }
2334    return false
2335  }
2336
2337  /*  */
2338
2339  // The template compiler attempts to minimize the need for normalization by
2340  // statically analyzing the template at compile time.
2341  //
2342  // For plain HTML markup, normalization can be completely skipped because the
2343  // generated render function is guaranteed to return Array<VNode>. There are
2344  // two cases where extra normalization is needed:
2345
2346  // 1. When the children contains components - because a functional component
2347  // may return an Array instead of a single root. In this case, just a simple
2348  // normalization is needed - if any child is an Array, we flatten the whole
2349  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
2350  // because functional components already normalize their own children.
2351  function simpleNormalizeChildren (children) {
2352    for (var i = 0; i < children.length; i++) {
2353      if (Array.isArray(children[i])) {
2354        return Array.prototype.concat.apply([], children)
2355      }
2356    }
2357    return children
2358  }
2359
2360  // 2. When the children contains constructs that always generated nested Arrays,
2361  // e.g. <template>, <slot>, v-for, or when the children is provided by user
2362  // with hand-written render functions / JSX. In such cases a full normalization
2363  // is needed to cater to all possible types of children values.
2364  function normalizeChildren (children) {
2365    return isPrimitive(children)
2366      ? [createTextVNode(children)]
2367      : Array.isArray(children)
2368        ? normalizeArrayChildren(children)
2369        : undefined
2370  }
2371
2372  function isTextNode (node) {
2373    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
2374  }
2375
2376  function normalizeArrayChildren (children, nestedIndex) {
2377    var res = [];
2378    var i, c, lastIndex, last;
2379    for (i = 0; i < children.length; i++) {
2380      c = children[i];
2381      if (isUndef(c) || typeof c === 'boolean') { continue }
2382      lastIndex = res.length - 1;
2383      last = res[lastIndex];
2384      //  nested
2385      if (Array.isArray(c)) {
2386        if (c.length > 0) {
2387          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
2388          // merge adjacent text nodes
2389          if (isTextNode(c[0]) && isTextNode(last)) {
2390            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
2391            c.shift();
2392          }
2393          res.push.apply(res, c);
2394        }
2395      } else if (isPrimitive(c)) {
2396        if (isTextNode(last)) {
2397          // merge adjacent text nodes
2398          // this is necessary for SSR hydration because text nodes are
2399          // essentially merged when rendered to HTML strings
2400          res[lastIndex] = createTextVNode(last.text + c);
2401        } else if (c !== '') {
2402          // convert primitive to vnode
2403          res.push(createTextVNode(c));
2404        }
2405      } else {
2406        if (isTextNode(c) && isTextNode(last)) {
2407          // merge adjacent text nodes
2408          res[lastIndex] = createTextVNode(last.text + c.text);
2409        } else {
2410          // default key for nested array children (likely generated by v-for)
2411          if (isTrue(children._isVList) &&
2412            isDef(c.tag) &&
2413            isUndef(c.key) &&
2414            isDef(nestedIndex)) {
2415            c.key = "__vlist" + nestedIndex + "_" + i + "__";
2416          }
2417          res.push(c);
2418        }
2419      }
2420    }
2421    return res
2422  }
2423
2424  /*  */
2425
2426  function initProvide (vm) {
2427    var provide = vm.$options.provide;
2428    if (provide) {
2429      vm._provided = typeof provide === 'function'
2430        ? provide.call(vm)
2431        : provide;
2432    }
2433  }
2434
2435  function initInjections (vm) {
2436    var result = resolveInject(vm.$options.inject, vm);
2437    if (result) {
2438      toggleObserving(false);
2439      Object.keys(result).forEach(function (key) {
2440        /* istanbul ignore else */
2441        {
2442          defineReactive$$1(vm, key, result[key], function () {
2443            warn(
2444              "Avoid mutating an injected value directly since the changes will be " +
2445              "overwritten whenever the provided component re-renders. " +
2446              "injection being mutated: \"" + key + "\"",
2447              vm
2448            );
2449          });
2450        }
2451      });
2452      toggleObserving(true);
2453    }
2454  }
2455
2456  function resolveInject (inject, vm) {
2457    if (inject) {
2458      // inject is :any because flow is not smart enough to figure out cached
2459      var result = Object.create(null);
2460      var keys = hasSymbol
2461        ? Reflect.ownKeys(inject)
2462        : Object.keys(inject);
2463
2464      for (var i = 0; i < keys.length; i++) {
2465        var key = keys[i];
2466        // #6574 in case the inject object is observed...
2467        if (key === '__ob__') { continue }
2468        var provideKey = inject[key].from;
2469        var source = vm;
2470        while (source) {
2471          if (source._provided && hasOwn(source._provided, provideKey)) {
2472            result[key] = source._provided[provideKey];
2473            break
2474          }
2475          source = source.$parent;
2476        }
2477        if (!source) {
2478          if ('default' in inject[key]) {
2479            var provideDefault = inject[key].default;
2480            result[key] = typeof provideDefault === 'function'
2481              ? provideDefault.call(vm)
2482              : provideDefault;
2483          } else {
2484            warn(("Injection \"" + key + "\" not found"), vm);
2485          }
2486        }
2487      }
2488      return result
2489    }
2490  }
2491
2492  /*  */
2493
2494
2495
2496  /**
2497   * Runtime helper for resolving raw children VNodes into a slot object.
2498   */
2499  function resolveSlots (
2500    children,
2501    context
2502  ) {
2503    if (!children || !children.length) {
2504      return {}
2505    }
2506    var slots = {};
2507    for (var i = 0, l = children.length; i < l; i++) {
2508      var child = children[i];
2509      var data = child.data;
2510      // remove slot attribute if the node is resolved as a Vue slot node
2511      if (data && data.attrs && data.attrs.slot) {
2512        delete data.attrs.slot;
2513      }
2514      // named slots should only be respected if the vnode was rendered in the
2515      // same context.
2516      if ((child.context === context || child.fnContext === context) &&
2517        data && data.slot != null
2518      ) {
2519        var name = data.slot;
2520        var slot = (slots[name] || (slots[name] = []));
2521        if (child.tag === 'template') {
2522          slot.push.apply(slot, child.children || []);
2523        } else {
2524          slot.push(child);
2525        }
2526      } else {
2527        (slots.default || (slots.default = [])).push(child);
2528      }
2529    }
2530    // ignore slots that contains only whitespace
2531    for (var name$1 in slots) {
2532      if (slots[name$1].every(isWhitespace)) {
2533        delete slots[name$1];
2534      }
2535    }
2536    return slots
2537  }
2538
2539  function isWhitespace (node) {
2540    return (node.isComment && !node.asyncFactory) || node.text === ' '
2541  }
2542
2543  /*  */
2544
2545  function normalizeScopedSlots (
2546    slots,
2547    normalSlots,
2548    prevSlots
2549  ) {
2550    var res;
2551    var hasNormalSlots = Object.keys(normalSlots).length > 0;
2552    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
2553    var key = slots && slots.$key;
2554    if (!slots) {
2555      res = {};
2556    } else if (slots._normalized) {
2557      // fast path 1: child component re-render only, parent did not change
2558      return slots._normalized
2559    } else if (
2560      isStable &&
2561      prevSlots &&
2562      prevSlots !== emptyObject &&
2563      key === prevSlots.$key &&
2564      !hasNormalSlots &&
2565      !prevSlots.$hasNormal
2566    ) {
2567      // fast path 2: stable scoped slots w/ no normal slots to proxy,
2568      // only need to normalize once
2569      return prevSlots
2570    } else {
2571      res = {};
2572      for (var key$1 in slots) {
2573        if (slots[key$1] && key$1[0] !== '$') {
2574          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
2575        }
2576      }
2577    }
2578    // expose normal slots on scopedSlots
2579    for (var key$2 in normalSlots) {
2580      if (!(key$2 in res)) {
2581        res[key$2] = proxyNormalSlot(normalSlots, key$2);
2582      }
2583    }

2584    // avoriaz seems to mock a non-extensible $scopedSlots object
2585    // and when that is passed down this would cause an error
2586    if (slots && Object.isExtensible(slots)) {
2587      (slots)._normalized = res;
2588    }
2589    def(res, '$stable', isStable);
2590    def(res, '$key', key);
2591    def(res, '$hasNormal', hasNormalSlots);
2592    return res
2593  }
2594
2595  function normalizeScopedSlot(normalSlots, key, fn) {
2596    var normalized = function () {
2597      var res = arguments.length ? fn.apply(null, arguments) : fn({});
2598      res = res && typeof res === 'object' && !Array.isArray(res)
2599        ? [res] // single vnode
2600        : normalizeChildren(res);
2601      return res && (
2602        res.length === 0 ||
2603        (res.length === 1 && res[0].isComment) // #9658
2604      ) ? undefined
2605        : res
2606    };
2607    // this is a slot using the new v-slot syntax without scope. although it is
2608    // compiled as a scoped slot, render fn users would expect it to be present
2609    // on this.$slots because the usage is semantically a normal slot.
2610    if (fn.proxy) {
2611      Object.defineProperty(normalSlots, key, {
2612        get: normalized,
2613        enumerable: true,
2614        configurable: true
2615      });
2616    }
2617    return normalized
2618  }
2619
2620  function proxyNormalSlot(slots, key) {
2621    return function () { return slots[key]; }
2622  }
2623
2624  /*  */
2625
2626  /**
2627   * Runtime helper for rendering v-for lists.
2628   */
2629  function renderList (
2630    val,
2631    render
2632  ) {
2633    var ret, i, l, keys, key;
2634    if (Array.isArray(val) || typeof val === 'string') {
2635      ret = new Array(val.length);
2636      for (i = 0, l = val.length; i < l; i++) {
2637        ret[i] = render(val[i], i);
2638      }
2639    } else if (typeof val === 'number') {
2640      ret = new Array(val);
2641      for (i = 0; i < val; i++) {
2642        ret[i] = render(i + 1, i);
2643      }
2644    } else if (isObject(val)) {
2645      if (hasSymbol && val[Symbol.iterator]) {
2646        ret = [];
2647        var iterator = val[Symbol.iterator]();
2648        var result = iterator.next();
2649        while (!result.done) {
2650          ret.push(render(result.value, ret.length));
2651          result = iterator.next();
2652        }
2653      } else {
2654        keys = Object.keys(val);
2655        ret = new Array(keys.length);
2656        for (i = 0, l = keys.length; i < l; i++) {
2657          key = keys[i];
2658          ret[i] = render(val[key], key, i);
2659        }
2660      }
2661    }
2662    if (!isDef(ret)) {
2663      ret = [];
2664    }
2665    (ret)._isVList = true;
2666    return ret
2667  }
2668
2669  /*  */
2670
2671  /**
2672   * Runtime helper for rendering <slot>
2673   */

2674  function renderSlot (
2675    name,
2676    fallback,
2677    props,
2678    bindObject
2679  ) {
2680    var scopedSlotFn = this.$scopedSlots[name];
2681    var nodes;
2682    if (scopedSlotFn) { // scoped slot
2683      props = props || {};
2684      if (bindObject) {
2685        if (!isObject(bindObject)) {
2686          warn(
2687            'slot v-bind without argument expects an Object',
2688            this
2689          );
2690        }
2691        props = extend(extend({}, bindObject), props);
2692      }
2693      nodes = scopedSlotFn(props) || fallback;
2694    } else {
2695      nodes = this.$slots[name] || fallback;
2696    }
2697
2698    var target = props && props.slot;
2699    if (target) {
2700      return this.$createElement('template', { slot: target }, nodes)
2701    } else {
2702      return nodes
2703    }
2704  }
2705
2706  /*  */
2707
2708  /**
2709   * Runtime helper for resolving filters
2710   */
2711  function resolveFilter (id) {
2712    return resolveAsset(this.$options, 'filters', id, true) || identity
2713  }
2714
2715  /*  */
2716
2717  function isKeyNotMatch (expect, actual) {
2718    if (Array.isArray(expect)) {
2719      return expect.indexOf(actual) === -1
2720    } else {
2721      return expect !== actual
2722    }
2723  }
2724
2725  /**
2726   * Runtime helper for checking keyCodes from config.
2727   * exposed as Vue.prototype._k
2728   * passing in eventKeyName as last argument separately for backwards compat
2729   */
2730  function checkKeyCodes (
2731    eventKeyCode,
2732    key,
2733    builtInKeyCode,
2734    eventKeyName,
2735    builtInKeyName
2736  ) {
2737    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
2738    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
2739      return isKeyNotMatch(builtInKeyName, eventKeyName)
2740    } else if (mappedKeyCode) {
2741      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
2742    } else if (eventKeyName) {
2743      return hyphenate(eventKeyName) !== key
2744    }
2745  }
2746
2747  /*  */
2748
2749  /**
2750   * Runtime helper for merging v-bind="object" into a VNode's data.
2751   */
2752  function bindObjectProps (
2753    data,
2754    tag,
2755    value,
2756    asProp,
2757    isSync
2758  ) {
2759    if (value) {
2760      if (!isObject(value)) {
2761        warn(
2762          'v-bind without argument expects an Object or Array value',
2763          this
2764        );
2765      } else {
2766        if (Array.isArray(value)) {
2767          value = toObject(value);
2768        }
2769        var hash;
2770        var loop = function ( key ) {
2771          if (
2772            key === 'class' ||
2773            key === 'style' ||
2774            isReservedAttribute(key)
2775          ) {
2776            hash = data;
2777          } else {
2778            var type = data.attrs && data.attrs.type;
2779            hash = asProp || config.mustUseProp(tag, type, key)
2780              ? data.domProps || (data.domProps = {})
2781              : data.attrs || (data.attrs = {});
2782          }
2783          var camelizedKey = camelize(key);
2784          var hyphenatedKey = hyphenate(key);
2785          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
2786            hash[key] = value[key];
2787
2788            if (isSync) {
2789              var on = data.on || (data.on = {});
2790              on[("update:" + key)] = function ($event) {
2791                value[key] = $event;
2792              };
2793            }
2794          }
2795        };
2796
2797        for (var key in value) loop( key );
2798      }
2799    }
2800    return data
2801  }
2802
2803  /*  */
2804
2805  /**
2806   * Runtime helper for rendering static trees.
2807   */

2808  function renderStatic (
2809    index,
2810    isInFor
2811  ) {
2812    var cached = this._staticTrees || (this._staticTrees = []);
2813    var tree = cached[index];
2814    // if has already-rendered static tree and not inside v-for,
2815    // we can reuse the same tree.
2816    if (tree && !isInFor) {
2817      return tree
2818    }
2819    // otherwise, render a fresh tree.
2820    tree = cached[index] = this.$options.staticRenderFns[index].call(
2821      this._renderProxy,
2822      null,
2823      this // for render fns generated for functional component templates
2824    );
2825    markStatic(tree, ("__static__" + index), false);
2826    return tree
2827  }
2828
2829  /**
2830   * Runtime helper for v-once.
2831   * Effectively it means marking the node as static with a unique key.
2832   */
2833  function markOnce (
2834    tree,
2835    index,
2836    key
2837  ) {
2838    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
2839    return tree
2840  }
2841
2842  function markStatic (
2843    tree,
2844    key,
2845    isOnce
2846  ) {
2847    if (Array.isArray(tree)) {
2848      for (var i = 0; i < tree.length; i++) {
2849        if (tree[i] && typeof tree[i] !== 'string') {
2850          markStaticNode(tree[i], (key + "_" + i), isOnce);
2851        }
2852      }
2853    } else {
2854      markStaticNode(tree, key, isOnce);
2855    }
2856  }
2857
2858  function markStaticNode (node, key, isOnce) {
2859    node.isStatic = true;
2860    node.key = key;
2861    node.isOnce = isOnce;
2862  }
2863
2864  /*  */
2865
2866  function bindObjectListeners (data, value) {
2867    if (value) {
2868      if (!isPlainObject(value)) {
2869        warn(
2870          'v-on without argument expects an Object value',
2871          this
2872        );
2873      } else {
2874        var on = data.on = data.on ? extend({}, data.on) : {};
2875        for (var key in value) {
2876          var existing = on[key];
2877          var ours = value[key];
2878          on[key] = existing ? [].concat(existing, ours) : ours;
2879        }
2880      }
2881    }
2882    return data
2883  }
2884
2885  /*  */
2886
2887  function resolveScopedSlots (
2888    fns, // see flow/vnode
2889    res,
2890    // the following are added in 2.6
2891    hasDynamicKeys,
2892    contentHashKey
2893  ) {
2894    res = res || { $stable: !hasDynamicKeys };
2895    for (var i = 0; i < fns.length; i++) {
2896      var slot = fns[i];
2897      if (Array.isArray(slot)) {
2898        resolveScopedSlots(slot, res, hasDynamicKeys);
2899      } else if (slot) {
2900        // marker for reverse proxying v-slot without scope on this.$slots
2901        if (slot.proxy) {
2902          slot.fn.proxy = true;
2903        }
2904        res[slot.key] = slot.fn;
2905      }
2906    }
2907    if (contentHashKey) {
2908      (res).$key = contentHashKey;
2909    }
2910    return res
2911  }
2912
2913  /*  */
2914
2915  function bindDynamicKeys (baseObj, values) {
2916    for (var i = 0; i < values.length; i += 2) {
2917      var key = values[i];
2918      if (typeof key === 'string' && key) {
2919        baseObj[values[i]] = values[i + 1];
2920      } else if (key !== '' && key !== null) {
2921        // null is a speical value for explicitly removing a binding
2922        warn(
2923          ("Invalid value for dynamic directive argument (expected string or null): " + key),
2924          this
2925        );
2926      }
2927    }
2928    return baseObj
2929  }
2930
2931  // helper to dynamically append modifier runtime markers to event names.
2932  // ensure only append when value is already string, otherwise it will be cast
2933  // to string and cause the type check to miss.
2934  function prependModifier (value, symbol) {
2935    return typeof value === 'string' ? symbol + value : value
2936  }
2937
2938  /*  */
2939
2940  function installRenderHelpers (target) {
2941    target._o = markOnce;
2942    target._n = toNumber;
2943    target._s = toString;
2944    target._l = renderList;
2945    target._t = renderSlot;
2946    target._q = looseEqual;
2947    target._i = looseIndexOf;
2948    target._m = renderStatic;
2949    target._f = resolveFilter;
2950    target._k = checkKeyCodes;
2951    target._b = bindObjectProps;
2952    target._v = createTextVNode;
2953    target._e = createEmptyVNode;
2954    target._u = resolveScopedSlots;
2955    target._g = bindObjectListeners;
2956    target._d = bindDynamicKeys;
2957    target._p = prependModifier;
2958  }
2959
2960  /*  */
2961
2962  function FunctionalRenderContext (
2963    data,
2964    props,
2965    children,
2966    parent,
2967    Ctor
2968  ) {
2969    var this$1 = this;
2970
2971    var options = Ctor.options;
2972    // ensure the createElement function in functional components
2973    // gets a unique context - this is necessary for correct named slot check
2974    var contextVm;
2975    if (hasOwn(parent, '_uid')) {
2976      contextVm = Object.create(parent);
2977      // $flow-disable-line
2978      contextVm._original = parent;
2979    } else {
2980      // the context vm passed in is a functional context as well.
2981      // in this case we want to make sure we are able to get a hold to the
2982      // real context instance.
2983      contextVm = parent;
2984      // $flow-disable-line
2985      parent = parent._original;
2986    }
2987    var isCompiled = isTrue(options._compiled);
2988    var needNormalization = !isCompiled;
2989
2990    this.data = data;
2991    this.props = props;
2992    this.children = children;
2993    this.parent = parent;
2994    this.listeners = data.on || emptyObject;
2995    this.injections = resolveInject(options.inject, parent);
2996    this.slots = function () {
2997      if (!this$1.$slots) {
2998        normalizeScopedSlots(
2999          data.scopedSlots,
3000          this$1.$slots = resolveSlots(children, parent)
3001        );
3002      }
3003      return this$1.$slots
3004    };
3005
3006    Object.defineProperty(this, 'scopedSlots', ({
3007      enumerable: true,
3008      get: function get () {
3009        return normalizeScopedSlots(data.scopedSlots, this.slots())
3010      }
3011    }));
3012
3013    // support for compiled functional template
3014    if (isCompiled) {
3015      // exposing $options for renderStatic()
3016      this.$options = options;
3017      // pre-resolve slots for renderSlot()
3018      this.$slots = this.slots();
3019      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
3020    }
3021
3022    if (options._scopeId) {
3023      this._c = function (a, b, c, d) {
3024        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
3025        if (vnode && !Array.isArray(vnode)) {
3026          vnode.fnScopeId = options._scopeId;
3027          vnode.fnContext = parent;
3028        }
3029        return vnode
3030      };
3031    } else {
3032      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
3033    }
3034  }
3035
3036  installRenderHelpers(FunctionalRenderContext.prototype);
3037
3038  function createFunctionalComponent (
3039    Ctor,
3040    propsData,
3041    data,
3042    contextVm,
3043    children
3044  ) {
3045    var options = Ctor.options;
3046    var props = {};
3047    var propOptions = options.props;
3048    if (isDef(propOptions)) {
3049      for (var key in propOptions) {
3050        props[key] = validateProp(key, propOptions, propsData || emptyObject);
3051      }
3052    } else {
3053      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
3054      if (isDef(data.props)) { mergeProps(props, data.props); }
3055    }
3056
3057    var renderContext = new FunctionalRenderContext(
3058      data,
3059      props,
3060      children,
3061      contextVm,
3062      Ctor
3063    );
3064
3065    var vnode = options.render.call(null, renderContext._c, renderContext);
3066
3067    if (vnode instanceof VNode) {
3068      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
3069    } else if (Array.isArray(vnode)) {
3070      var vnodes = normalizeChildren(vnode) || [];
3071      var res = new Array(vnodes.length);
3072      for (var i = 0; i < vnodes.length; i++) {
3073        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
3074      }
3075      return res
3076    }
3077  }
3078
3079  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
3080    // #7817 clone node before setting fnContext, otherwise if the node is reused

3081    // (e.g. it was from a cached normal slot) the fnContext causes named slots
3082    // that should not be matched to match.
3083    var clone = cloneVNode(vnode);
3084    clone.fnContext = contextVm;
3085    clone.fnOptions = options;
3086    {
3087      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
3088    }
3089    if (data.slot) {
3090      (clone.data || (clone.data = {})).slot = data.slot;
3091    }
3092    return clone
3093  }
3094
3095  function mergeProps (to, from) {
3096    for (var key in from) {
3097      to[camelize(key)] = from[key];
3098    }
3099  }
3100
3101  /*  */
3102
3103  /*  */
3104
3105  /*  */
3106
3107  /*  */
3108
3109  // inline hooks to be invoked on component VNodes during patch
3110  var componentVNodeHooks = {
3111    init: function init (vnode, hydrating) {
3112      if (
3113        vnode.componentInstance &&
3114        !vnode.componentInstance._isDestroyed &&
3115        vnode.data.keepAlive
3116      ) {
3117        // kept-alive components, treat as a patch
3118        var mountedNode = vnode; // work around flow
3119        componentVNodeHooks.prepatch(mountedNode, mountedNode);
3120      } else {
3121        var child = vnode.componentInstance = createComponentInstanceForVnode(
3122          vnode,
3123          activeInstance
3124        );
3125        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
3126      }
3127    },
3128
3129    prepatch: function prepatch (oldVnode, vnode) {
3130      var options = vnode.componentOptions;
3131      var child = vnode.componentInstance = oldVnode.componentInstance;
3132      updateChildComponent(
3133        child,
3134        options.propsData, // updated props
3135        options.listeners, // updated listeners
3136        vnode, // new parent vnode
3137        options.children // new children
3138      );
3139    },
3140
3141    insert: function insert (vnode) {
3142      var context = vnode.context;
3143      var componentInstance = vnode.componentInstance;
3144      if (!componentInstance._isMounted) {
3145        componentInstance._isMounted = true;
3146        callHook(componentInstance, 'mounted');
3147      }
3148      if (vnode.data.keepAlive) {
3149        if (context._isMounted) {
3150          // vue-router#1212
3151          // During updates, a kept-alive component's child components may
3152          // change, so directly walking the tree here may call activated hooks
3153          // on incorrect children. Instead we push them into a queue which will
3154          // be processed after the whole patch process ended.
3155          queueActivatedComponent(componentInstance);
3156        } else {
3157          activateChildComponent(componentInstance, true /* direct */);
3158        }
3159      }
3160    },
3161
3162    destroy: function destroy (vnode) {
3163      var componentInstance = vnode.componentInstance;
3164      if (!componentInstance._isDestroyed) {
3165        if (!vnode.data.keepAlive) {
3166          componentInstance.$destroy();
3167        } else {
3168          deactivateChildComponent(componentInstance, true /* direct */);
3169        }
3170      }
3171    }
3172  };
3173
3174  var hooksToMerge = Object.keys(componentVNodeHooks);
3175
3176  function createComponent (
3177    Ctor,
3178    data,
3179    context,
3180    children,
3181    tag
3182  ) {
3183    if (isUndef(Ctor)) {
3184      return
3185    }
3186
3187    var baseCtor = context.$options._base;
3188
3189    // plain options object: turn it into a constructor
3190    if (isObject(Ctor)) {
3191      Ctor = baseCtor.extend(Ctor);
3192    }
3193
3194    // if at this stage it's not a constructor or an async component factory,
3195    // reject.
3196    if (typeof Ctor !== 'function') {
3197      {
3198        warn(("Invalid Component definition: " + (String(Ctor))), context);
3199      }
3200      return
3201    }
3202
3203    // async component
3204    var asyncFactory;
3205    if (isUndef(Ctor.cid)) {
3206      asyncFactory = Ctor;
3207      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
3208      if (Ctor === undefined) {
3209        // return a placeholder node for async component, which is rendered
3210        // as a comment node but preserves all the raw information for the node.
3211        // the information will be used for async server-rendering and hydration.
3212        return createAsyncPlaceholder(
3213          asyncFactory,
3214          data,
3215          context,
3216          children,
3217          tag
3218        )
3219      }
3220    }
3221
3222    data = data || {};
3223
3224    // resolve constructor options in case global mixins are applied after
3225    // component constructor creation
3226    resolveConstructorOptions(Ctor);
3227
3228    // transform component v-model data into props & events
3229    if (isDef(data.model)) {
3230      transformModel(Ctor.options, data);
3231    }
3232
3233    // extract props
3234    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
3235
3236    // functional component
3237    if (isTrue(Ctor.options.functional)) {
3238      return createFunctionalComponent(Ctor, propsData, data, context, children)
3239    }
3240
3241    // extract listeners, since these needs to be treated as
3242    // child component listeners instead of DOM listeners
3243    var listeners = data.on;
3244    // replace with listeners with .native modifier
3245    // so it gets processed during parent component patch.
3246    data.on = data.nativeOn;
3247
3248    if (isTrue(Ctor.options.abstract)) {
3249      // abstract components do not keep anything
3250      // other than props & listeners & slot
3251
3252      // work around flow
3253      var slot = data.slot;
3254      data = {};
3255      if (slot) {
3256        data.slot = slot;
3257      }
3258    }
3259

3260    // install component management hooks onto the placeholder node
3261    installComponentHooks(data);
3262
3263    // return a placeholder vnode
3264    var name = Ctor.options.name || tag;
3265    var vnode = new VNode(
3266      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
3267      data, undefined, undefined, undefined, context,
3268      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
3269      asyncFactory
3270    );
3271
3272    return vnode
3273  }
3274
3275  function createComponentInstanceForVnode (
3276    vnode, // we know it's MountedComponentVNode but flow doesn't
3277    parent // activeInstance in lifecycle state
3278  ) {
3279    var options = {
3280      _isComponent: true,
3281      _parentVnode: vnode,
3282      parent: parent
3283    };
3284    // check inline-template render functions
3285    var inlineTemplate = vnode.data.inlineTemplate;
3286    if (isDef(inlineTemplate)) {
3287      options.render = inlineTemplate.render;
3288      options.staticRenderFns = inlineTemplate.staticRenderFns;
3289    }
3290    return new vnode.componentOptions.Ctor(options)
3291  }
3292
3293  function installComponentHooks (data) {
3294    var hooks = data.hook || (data.hook = {});
3295    for (var i = 0; i < hooksToMerge.length; i++) {
3296      var key = hooksToMerge[i];
3297      var existing = hooks[key];
3298      var toMerge = componentVNodeHooks[key];
3299      if (existing !== toMerge && !(existing && existing._merged)) {
3300        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
3301      }
3302    }
3303  }
3304
3305  function mergeHook$1 (f1, f2) {
3306    var merged = function (a, b) {
3307      // flow complains about extra args which is why we use any
3308      f1(a, b);
3309      f2(a, b);
3310    };
3311    merged._merged = true;
3312    return merged
3313  }
3314
3315  // transform component v-model info (value and callback) into
3316  // prop and event handler respectively.
3317  function transformModel (options, data) {
3318    var prop = (options.model && options.model.prop) || 'value';
3319    var event = (options.model && options.model.event) || 'input'
3320    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
3321    var on = data.on || (data.on = {});
3322    var existing = on[event];
3323    var callback = data.model.callback;
3324    if (isDef(existing)) {
3325      if (
3326        Array.isArray(existing)
3327          ? existing.indexOf(callback) === -1
3328          : existing !== callback
3329      ) {
3330        on[event] = [callback].concat(existing);
3331      }
3332    } else {
3333      on[event] = callback;
3334    }
3335  }
3336
3337  /*  */
3338
3339  var SIMPLE_NORMALIZE = 1;
3340  var ALWAYS_NORMALIZE = 2;
3341
3342  // wrapper function for providing a more flexible interface
3343  // without getting yelled at by flow
3344  function createElement (
3345    context,
3346    tag,
3347    data,
3348    children,
3349    normalizationType,
3350    alwaysNormalize
3351  ) {
3352    if (Array.isArray(data) || isPrimitive(data)) {
3353      normalizationType = children;
3354      children = data;
3355      data = undefined;
3356    }
3357    if (isTrue(alwaysNormalize)) {
3358      normalizationType = ALWAYS_NORMALIZE;
3359    }
3360    return _createElement(context, tag, data, children, normalizationType)
3361  }
3362
3363  function _createElement (
3364    context,
3365    tag,
3366    data,
3367    children,
3368    normalizationType
3369  ) {
3370    if (isDef(data) && isDef((data).__ob__)) {
3371      warn(
3372        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
3373        'Always create fresh vnode data objects in each render!',
3374        context
3375      );
3376      return createEmptyVNode()
3377    }
3378    // object syntax in v-bind
3379    if (isDef(data) && isDef(data.is)) {
3380      tag = data.is;
3381    }
3382    if (!tag) {
3383      // in case of component :is set to falsy value
3384      return createEmptyVNode()
3385    }
3386    // warn against non-primitive key
3387    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
3388    ) {
3389      {
3390        warn(
3391          'Avoid using non-primitive value as key, ' +
3392          'use string/number value instead.',
3393          context
3394        );
3395      }
3396    }
3397    // support single function children as default scoped slot
3398    if (Array.isArray(children) &&
3399      typeof children[0] === 'function'
3400    ) {
3401      data = data || {};
3402      data.scopedSlots = { default: children[0] };
3403      children.length = 0;
3404    }
3405    if (normalizationType === ALWAYS_NORMALIZE) {
3406      children = normalizeChildren(children);
3407    } else if (normalizationType === SIMPLE_NORMALIZE) {
3408      children = simpleNormalizeChildren(children);
3409    }
3410    var vnode, ns;
3411    if (typeof tag === 'string') {
3412      var Ctor;
3413      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
3414      if (config.isReservedTag(tag)) {
3415        // platform built-in elements
3416        vnode = new VNode(
3417          config.parsePlatformTagName(tag), data, children,

3418          undefined, undefined, context
3419        );
3420      } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
3421        // component
3422        vnode = createComponent(Ctor, data, context, children, tag);
3423      } else {
3424        // unknown or unlisted namespaced elements
3425        // check at runtime because it may get assigned a namespace when its
3426        // parent normalizes children
3427        vnode = new VNode(
3428          tag, data, children,
3429          undefined, undefined, context
3430        );
3431      }
3432    } else {
3433      // direct component options / constructor
3434      vnode = createComponent(tag, data, context, children);
3435    }
3436    if (Array.isArray(vnode)) {
3437      return vnode
3438    } else if (isDef(vnode)) {
3439      if (isDef(ns)) { applyNS(vnode, ns); }
3440      if (isDef(data)) { registerDeepBindings(data); }
3441      return vnode
3442    } else {
3443      return createEmptyVNode()
3444    }
3445  }
3446
3447  function applyNS (vnode, ns, force) {
3448    vnode.ns = ns;
3449    if (vnode.tag === 'foreignObject') {
3450      // use default namespace inside foreignObject
3451      ns = undefined;
3452      force = true;
3453    }

3454    if (isDef(vnode.children)) {
3455      for (var i = 0, l = vnode.children.length; i < l; i++) {
3456        var child = vnode.children[i];
3457        if (isDef(child.tag) && (
3458          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
3459          applyNS(child, ns, force);
3460        }
3461      }
3462    }
3463  }
3464
3465  // ref #5318
3466  // necessary to ensure parent re-render when deep bindings like :style and
3467  // :class are used on slot nodes
3468  function registerDeepBindings (data) {
3469    if (isObject(data.style)) {
3470      traverse(data.style);
3471    }
3472    if (isObject(data.class)) {
3473      traverse(data.class);
3474    }
3475  }
3476
3477  /*  */
3478
3479  function initRender (vm) {
3480    vm._vnode = null; // the root of the child tree
3481    vm._staticTrees = null; // v-once cached trees
3482    var options = vm.$options;
3483    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
3484    var renderContext = parentVnode && parentVnode.context;
3485    vm.$slots = resolveSlots(options._renderChildren, renderContext);
3486    vm.$scopedSlots = emptyObject;
3487    // bind the createElement fn to this instance
3488    // so that we get proper render context inside it.
3489    // args order: tag, data, children, normalizationType, alwaysNormalize
3490    // internal version is used by render functions compiled from templates
3491    vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
3492    // normalization is always applied for the public version, used in
3493    // user-written render functions.
3494    vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
3495
3496    // $attrs & $listeners are exposed for easier HOC creation.
3497    // they need to be reactive so that HOCs using them are always updated
3498    var parentData = parentVnode && parentVnode.data;
3499
3500    /* istanbul ignore else */
3501    {
3502      defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
3503        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
3504      }, true);
3505      defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
3506        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
3507      }, true);
3508    }
3509  }
3510
3511  var currentRenderingInstance = null;
3512
3513  function renderMixin (Vue) {
3514    // install runtime convenience helpers
3515    installRenderHelpers(Vue.prototype);
3516
3517    Vue.prototype.$nextTick = function (fn) {
3518      return nextTick(fn, this)
3519    };
3520
3521    Vue.prototype._render = function () {
3522      var vm = this;
3523      var ref = vm.$options;
3524      var render = ref.render;
3525      var _parentVnode = ref._parentVnode;
3526
3527      if (_parentVnode) {
3528        vm.$scopedSlots = normalizeScopedSlots(
3529          _parentVnode.data.scopedSlots,
3530          vm.$slots,
3531          vm.$scopedSlots
3532        );
3533      }
3534
3535      // set parent vnode. this allows render functions to have access
3536      // to the data on the placeholder node.
3537      vm.$vnode = _parentVnode;
3538      // render self
3539      var vnode;
3540      try {
3541        // There's no need to maintain a stack becaues all render fns are called
3542        // separately from one another. Nested component's render fns are called
3543        // when parent component is patched.
3544        currentRenderingInstance = vm;
3545        vnode = render.call(vm._renderProxy, vm.$createElement);
3546      } catch (e) {
3547        handleError(e, vm, "render");
3548        // return error render result,
3549        // or previous vnode to prevent render error causing blank component
3550        /* istanbul ignore else */
3551        if (vm.$options.renderError) {
3552          try {
3553            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
3554          } catch (e) {
3555            handleError(e, vm, "renderError");
3556            vnode = vm._vnode;
3557          }
3558        } else {
3559          vnode = vm._vnode;
3560        }
3561      } finally {
3562        currentRenderingInstance = null;
3563      }
3564      // if the returned array contains only a single node, allow it
3565      if (Array.isArray(vnode) && vnode.length === 1) {
3566        vnode = vnode[0];
3567      }
3568      // return empty vnode in case the render function errored out
3569      if (!(vnode instanceof VNode)) {
3570        if (Array.isArray(vnode)) {
3571          warn(
3572            'Multiple root nodes returned from render function. Render function ' +
3573            'should return a single root node.',
3574            vm
3575          );
3576        }
3577        vnode = createEmptyVNode();
3578      }
3579      // set parent
3580      vnode.parent = _parentVnode;
3581      return vnode
3582    };
3583  }
3584
3585  /*  */
3586
3587  function ensureCtor (comp, base) {
3588    if (
3589      comp.__esModule ||
3590      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
3591    ) {
3592      comp = comp.default;
3593    }
3594    return isObject(comp)
3595      ? base.extend(comp)
3596      : comp
3597  }
3598
3599  function createAsyncPlaceholder (
3600    factory,
3601    data,
3602    context,
3603    children,
3604    tag
3605  ) {
3606    var node = createEmptyVNode();
3607    node.asyncFactory = factory;
3608    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
3609    return node
3610  }
3611
3612  function resolveAsyncComponent (
3613    factory,
3614    baseCtor
3615  ) {
3616    if (isTrue(factory.error) && isDef(factory.errorComp)) {
3617      return factory.errorComp
3618    }
3619
3620    if (isDef(factory.resolved)) {
3621      return factory.resolved
3622    }
3623
3624    var owner = currentRenderingInstance;

3625    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
3626      // already pending
3627      factory.owners.push(owner);
3628    }
3629
3630    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
3631      return factory.loadingComp
3632    }
3633
3634    if (owner && !isDef(factory.owners)) {
3635      var owners = factory.owners = [owner];
3636      var sync = true;
3637      var timerLoading = null;
3638      var timerTimeout = null
3639
3640      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
3641
3642      var forceRender = function (renderCompleted) {
3643        for (var i = 0, l = owners.length; i < l; i++) {
3644          (owners[i]).$forceUpdate();
3645        }
3646
3647        if (renderCompleted) {
3648          owners.length = 0;
3649          if (timerLoading !== null) {
3650            clearTimeout(timerLoading);
3651            timerLoading = null;
3652          }
3653          if (timerTimeout !== null) {
3654            clearTimeout(timerTimeout);
3655            timerTimeout = null;
3656          }
3657        }
3658      };
3659
3660      var resolve = once(function (res) {
3661        // cache resolved
3662        factory.resolved = ensureCtor(res, baseCtor);
3663        // invoke callbacks only if this is not a synchronous resolve
3664        // (async resolves are shimmed as synchronous during SSR)
3665        if (!sync) {
3666          forceRender(true);
3667        } else {
3668          owners.length = 0;
3669        }
3670      });
3671
3672      var reject = once(function (reason) {
3673        warn(
3674          "Failed to resolve async component: " + (String(factory)) +
3675          (reason ? ("\nReason: " + reason) : '')
3676        );
3677        if (isDef(factory.errorComp)) {
3678          factory.error = true;
3679          forceRender(true);
3680        }
3681      });
3682
3683      var res = factory(resolve, reject);
3684
3685      if (isObject(res)) {
3686        if (isPromise(res)) {
3687          // () => Promise
3688          if (isUndef(factory.resolved)) {
3689            res.then(resolve, reject);
3690          }
3691        } else if (isPromise(res.component)) {
3692          res.component.then(resolve, reject);
3693
3694          if (isDef(res.error)) {
3695            factory.errorComp = ensureCtor(res.error, baseCtor);
3696          }
3697
3698          if (isDef(res.loading)) {
3699            factory.loadingComp = ensureCtor(res.loading, baseCtor);
3700            if (res.delay === 0) {
3701              factory.loading = true;
3702            } else {
3703              timerLoading = setTimeout(function () {
3704                timerLoading = null;
3705                if (isUndef(factory.resolved) && isUndef(factory.error)) {
3706                  factory.loading = true;
3707                  forceRender(false);
3708                }
3709              }, res.delay || 200);
3710            }
3711          }
3712
3713          if (isDef(res.timeout)) {
3714            timerTimeout = setTimeout(function () {
3715              timerTimeout = null;
3716              if (isUndef(factory.resolved)) {
3717                reject(
3718                  "timeout (" + (res.timeout) + "ms)"
3719                );
3720              }
3721            }, res.timeout);
3722          }
3723        }
3724      }
3725
3726      sync = false;
3727      // return in case resolved synchronously
3728      return factory.loading
3729        ? factory.loadingComp
3730        : factory.resolved
3731    }
3732  }
3733
3734  /*  */
3735
3736  function isAsyncPlaceholder (node) {
3737    return node.isComment && node.asyncFactory
3738  }
3739
3740  /*  */
3741
3742  function getFirstComponentChild (children) {
3743    if (Array.isArray(children)) {
3744      for (var i = 0; i < children.length; i++) {
3745        var c = children[i];
3746        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
3747          return c
3748        }
3749      }
3750    }
3751  }
3752
3753  /*  */
3754
3755  /*  */
3756
3757  function initEvents (vm) {
3758    vm._events = Object.create(null);
3759    vm._hasHookEvent = false;
3760    // init parent attached events
3761    var listeners = vm.$options._parentListeners;
3762    if (listeners) {
3763      updateComponentListeners(vm, listeners);
3764    }
3765  }
3766
3767  var target;
3768
3769  function add (event, fn) {
3770    target.$on(event, fn);
3771  }
3772
3773  function remove$1 (event, fn) {
3774    target.$off(event, fn);
3775  }
3776
3777  function createOnceHandler (event, fn) {
3778    var _target = target;
3779    return function onceHandler () {
3780      var res = fn.apply(null, arguments);
3781      if (res !== null) {
3782        _target.$off(event, onceHandler);
3783      }
3784    }
3785  }
3786
3787  function updateComponentListeners (
3788    vm,
3789    listeners,
3790    oldListeners
3791  ) {
3792    target = vm;
3793    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
3794    target = undefined;
3795  }
3796
3797  function eventsMixin (Vue) {
3798    var hookRE = /^hook:/;
3799    Vue.prototype.$on = function (event, fn) {
3800      var vm = this;
3801      if (Array.isArray(event)) {
3802        for (var i = 0, l = event.length; i < l; i++) {
3803          vm.$on(event[i], fn);
3804        }
3805      } else {
3806        (vm._events[event] || (vm._events[event] = [])).push(fn);
3807        // optimize hook:event cost by using a boolean flag marked at registration
3808        // instead of a hash lookup
3809        if (hookRE.test(event)) {
3810          vm._hasHookEvent = true;
3811        }
3812      }
3813      return vm
3814    };
3815
3816    Vue.prototype.$once = function (event, fn) {
3817      var vm = this;
3818      function on () {
3819        vm.$off(event, on);
3820        fn.apply(vm, arguments);
3821      }
3822      on.fn = fn;
3823      vm.$on(event, on);
3824      return vm
3825    };
3826
3827    Vue.prototype.$off = function (event, fn) {
3828      var vm = this;
3829      // all
3830      if (!arguments.length) {
3831        vm._events = Object.create(null);
3832        return vm
3833      }
3834      // array of events
3835      if (Array.isArray(event)) {
3836        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
3837          vm.$off(event[i$1], fn);
3838        }
3839        return vm
3840      }
3841      // specific event
3842      var cbs = vm._events[event];
3843      if (!cbs) {
3844        return vm
3845      }
3846      if (!fn) {
3847        vm._events[event] = null;
3848        return vm
3849      }
3850      // specific handler
3851      var cb;
3852      var i = cbs.length;
3853      while (i--) {
3854        cb = cbs[i];

3855        if (cb === fn || cb.fn === fn) {
3856          cbs.splice(i, 1);
3857          break
3858        }
3859      }
3860      return vm
3861    };
3862
3863    Vue.prototype.$emit = function (event) {
3864      var vm = this;
3865      {
3866        var lowerCaseEvent = event.toLowerCase();
3867        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
3868          tip(
3869            "Event \"" + lowerCaseEvent + "\" is emitted in component " +
3870            (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
3871            "Note that HTML attributes are case-insensitive and you cannot use " +
3872            "v-on to listen to camelCase events when using in-DOM templates. " +
3873            "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
3874          );
3875        }
3876      }
3877      var cbs = vm._events[event];
3878      if (cbs) {
3879        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
3880        var args = toArray(arguments, 1);
3881        var info = "event handler for \"" + event + "\"";
3882        for (var i = 0, l = cbs.length; i < l; i++) {
3883          invokeWithErrorHandling(cbs[i], vm, args, vm, info);
3884        }
3885      }
3886      return vm
3887    };
3888  }
3889
3890  /*  */
3891
3892  var activeInstance = null;
3893  var isUpdatingChildComponent = false;
3894
3895  function setActiveInstance(vm) {
3896    var prevActiveInstance = activeInstance;
3897    activeInstance = vm;
3898    return function () {
3899      activeInstance = prevActiveInstance;
3900    }
3901  }
3902
3903  function initLifecycle (vm) {
3904    var options = vm.$options;
3905
3906    // locate first non-abstract parent
3907    var parent = options.parent;
3908    if (parent && !options.abstract) {
3909      while (parent.$options.abstract && parent.$parent) {
3910        parent = parent.$parent;
3911      }
3912      parent.$children.push(vm);
3913    }
3914
3915    vm.$parent = parent;
3916    vm.$root = parent ? parent.$root : vm;
3917
3918    vm.$children = [];
3919    vm.$refs = {};
3920
3921    vm._watcher = null;
3922    vm._inactive = null;
3923    vm._directInactive = false;
3924    vm._isMounted = false;
3925    vm._isDestroyed = false;
3926    vm._isBeingDestroyed = false;
3927  }
3928
3929  function lifecycleMixin (Vue) {
3930    Vue.prototype._update = function (vnode, hydrating) {
3931      var vm = this;
3932      var prevEl = vm.$el;
3933      var prevVnode = vm._vnode;
3934      var restoreActiveInstance = setActiveInstance(vm);
3935      vm._vnode = vnode;
3936      // Vue.prototype.__patch__ is injected in entry points
3937      // based on the rendering backend used.
3938      if (!prevVnode) {
3939        // initial render
3940        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
3941      } else {
3942        // updates
3943        vm.$el = vm.__patch__(prevVnode, vnode);
3944      }
3945      restoreActiveInstance();
3946      // update __vue__ reference
3947      if (prevEl) {
3948        prevEl.__vue__ = null;
3949      }
3950      if (vm.$el) {
3951        vm.$el.__vue__ = vm;
3952      }
3953      // if parent is an HOC, update its $el as well
3954      if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
3955        vm.$parent.$el = vm.$el;
3956      }
3957      // updated hook is called by the scheduler to ensure that children are
3958      // updated in a parent's updated hook.
3959    };
3960
3961    Vue.prototype.$forceUpdate = function () {
3962      var vm = this;
3963      if (vm._watcher) {
3964        vm._watcher.update();
3965      }
3966    };
3967
3968    Vue.prototype.$destroy = function () {
3969      var vm = this;
3970      if (vm._isBeingDestroyed) {
3971        return
3972      }
3973      callHook(vm, 'beforeDestroy');
3974      vm._isBeingDestroyed = true;
3975      // remove self from parent
3976      var parent = vm.$parent;
3977      if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
3978        remove(parent.$children, vm);
3979      }
3980      // teardown watchers
3981      if (vm._watcher) {
3982        vm._watcher.teardown();
3983      }
3984      var i = vm._watchers.length;
3985      while (i--) {
3986        vm._watchers[i].teardown();
3987      }
3988      // remove reference from data ob
3989      // frozen object may not have observer.
3990      if (vm._data.__ob__) {
3991        vm._data.__ob__.vmCount--;
3992      }
3993      // call the last hook...
3994      vm._isDestroyed = true;
3995      // invoke destroy hooks on current rendered tree
3996      vm.__patch__(vm._vnode, null);
3997      // fire destroyed hook
3998      callHook(vm, 'destroyed');
3999      // turn off all instance listeners.
4000      vm.$off();
4001      // remove __vue__ reference
4002      if (vm.$el) {
4003        vm.$el.__vue__ = null;
4004      }
4005      // release circular reference (#6759)
4006      if (vm.$vnode) {
4007        vm.$vnode.parent = null;
4008      }
4009    };
4010  }
4011
4012  function mountComponent (
4013    vm,
4014    el,
4015    hydrating
4016  ) {
4017    vm.$el = el;
4018    if (!vm.$options.render) {
4019      vm.$options.render = createEmptyVNode;
4020      {
4021        /* istanbul ignore if */
4022        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
4023          vm.$options.el || el) {
4024          warn(
4025            'You are using the runtime-only build of Vue where the template ' +
4026            'compiler is not available. Either pre-compile the templates into ' +
4027            'render functions, or use the compiler-included build.',
4028            vm
4029          );
4030        } else {
4031          warn(
4032            'Failed to mount component: template or render function not defined.',
4033            vm
4034          );
4035        }
4036      }
4037    }
4038    callHook(vm, 'beforeMount');
4039
4040    var updateComponent;
4041    /* istanbul ignore if */
4042    if (config.performance && mark) {
4043      updateComponent = function () {
4044        var name = vm._name;
4045        var id = vm._uid;
4046        var startTag = "vue-perf-start:" + id;
4047        var endTag = "vue-perf-end:" + id;
4048
4049        mark(startTag);
4050        var vnode = vm._render();
4051        mark(endTag);
4052        measure(("vue " + name + " render"), startTag, endTag);
4053
4054        mark(startTag);
4055        vm._update(vnode, hydrating);
4056        mark(endTag);
4057        measure(("vue " + name + " patch"), startTag, endTag);
4058      };
4059    } else {
4060      updateComponent = function () {
4061        vm._update(vm._render(), hydrating);
4062      };
4063    }
4064
4065    // we set this to vm._watcher inside the watcher's constructor
4066    // since the watcher's initial patch may call $forceUpdate (e.g. inside child
4067    // component's mounted hook), which relies on vm._watcher being already defined
4068    new Watcher(vm, updateComponent, noop, {
4069      before: function before () {
4070        if (vm._isMounted && !vm._isDestroyed) {
4071          callHook(vm, 'beforeUpdate');
4072        }
4073      }
4074    }, true /* isRenderWatcher */);
4075    hydrating = false;

4076
4077    // manually mounted instance, call mounted on self
4078    // mounted is called for render-created child components in its inserted hook
4079    if (vm.$vnode == null) {
4080      vm._isMounted = true;
4081      callHook(vm, 'mounted');
4082    }
4083    return vm
4084  }
4085
4086  function updateChildComponent (
4087    vm,
4088    propsData,
4089    listeners,
4090    parentVnode,
4091    renderChildren
4092  ) {
4093    {
4094      isUpdatingChildComponent = true;
4095    }
4096
4097    // determine whether component has slot children
4098    // we need to do this before overwriting $options._renderChildren.
4099
4100    // check if there are dynamic scopedSlots (hand-written or compiled but with
4101    // dynamic slot names). Static scoped slots compiled from template has the
4102    // "$stable" marker.
4103    var newScopedSlots = parentVnode.data.scopedSlots;
4104    var oldScopedSlots = vm.$scopedSlots;
4105    var hasDynamicScopedSlot = !!(
4106      (newScopedSlots && !newScopedSlots.$stable) ||
4107      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
4108      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
4109    );
4110
4111    // Any static slot children from the parent may have changed during parent's
4112    // update. Dynamic scoped slots may also have changed. In such cases, a forced
4113    // update is necessary to ensure correctness.
4114    var needsForceUpdate = !!(
4115      renderChildren ||               // has new static slots
4116      vm.$options._renderChildren ||  // has old static slots
4117      hasDynamicScopedSlot
4118    );
4119
4120    vm.$options._parentVnode = parentVnode;
4121    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
4122
4123    if (vm._vnode) { // update child tree's parent
4124      vm._vnode.parent = parentVnode;
4125    }
4126    vm.$options._renderChildren = renderChildren;
4127
4128    // update $attrs and $listeners hash
4129    // these are also reactive so they may trigger child update if the child
4130    // used them during render
4131    vm.$attrs = parentVnode.data.attrs || emptyObject;
4132    vm.$listeners = listeners || emptyObject;
4133
4134    // update props
4135    if (propsData && vm.$options.props) {
4136      toggleObserving(false);
4137      var props = vm._props;
4138      var propKeys = vm.$options._propKeys || [];
4139      for (var i = 0; i < propKeys.length; i++) {
4140        var key = propKeys[i];
4141        var propOptions = vm.$options.props; // wtf flow?
4142        props[key] = validateProp(key, propOptions, propsData, vm);
4143      }
4144      toggleObserving(true);
4145      // keep a copy of raw propsData
4146      vm.$options.propsData = propsData;
4147    }
4148
4149    // update listeners
4150    listeners = listeners || emptyObject;
4151    var oldListeners = vm.$options._parentListeners;
4152    vm.$options._parentListeners = listeners;
4153    updateComponentListeners(vm, listeners, oldListeners);
4154
4155    // resolve slots + force update if has children
4156    if (needsForceUpdate) {
4157      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
4158      vm.$forceUpdate();
4159    }
4160
4161    {
4162      isUpdatingChildComponent = false;
4163    }
4164  }
4165
4166  function isInInactiveTree (vm) {
4167    while (vm && (vm = vm.$parent)) {
4168      if (vm._inactive) { return true }
4169    }
4170    return false
4171  }
4172
4173  function activateChildComponent (vm, direct) {
4174    if (direct) {
4175      vm._directInactive = false;
4176      if (isInInactiveTree(vm)) {
4177        return
4178      }
4179    } else if (vm._directInactive) {
4180      return
4181    }
4182    if (vm._inactive || vm._inactive === null) {
4183      vm._inactive = false;
4184      for (var i = 0; i < vm.$children.length; i++) {
4185        activateChildComponent(vm.$children[i]);
4186      }
4187      callHook(vm, 'activated');
4188    }
4189  }
4190
4191  function deactivateChildComponent (vm, direct) {
4192    if (direct) {
4193      vm._directInactive = true;
4194      if (isInInactiveTree(vm)) {
4195        return
4196      }
4197    }
4198    if (!vm._inactive) {
4199      vm._inactive = true;
4200      for (var i = 0; i < vm.$children.length; i++) {
4201        deactivateChildComponent(vm.$children[i]);
4202      }
4203      callHook(vm, 'deactivated');
4204    }
4205  }
4206
4207  function callHook (vm, hook) {
4208    // #7573 disable dep collection when invoking lifecycle hooks
4209    pushTarget();
4210    var handlers = vm.$options[hook];
4211    var info = hook + " hook";
4212    if (handlers) {
4213      for (var i = 0, j = handlers.length; i < j; i++) {
4214        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
4215      }
4216    }
4217    if (vm._hasHookEvent) {
4218      vm.$emit('hook:' + hook);
4219    }
4220    popTarget();
4221  }
4222
4223  /*  */
4224
4225  var MAX_UPDATE_COUNT = 100;
4226
4227  var queue = [];
4228  var activatedChildren = [];
4229  var has = {};
4230  var circular = {};
4231  var waiting = false;

4232  var flushing = false;
4233  var index = 0;
4234
4235  /**
4236   * Reset the scheduler's state.
4237   */
4238  function resetSchedulerState () {
4239    index = queue.length = activatedChildren.length = 0;
4240    has = {};
4241    {
4242      circular = {};
4243    }
4244    waiting = flushing = false;
4245  }
4246
4247  // Async edge case #6566 requires saving the timestamp when event listeners are
4248  // attached. However, calling performance.now() has a perf overhead especially
4249  // if the page has thousands of event listeners. Instead, we take a timestamp
4250  // every time the scheduler flushes and use that for all event listeners
4251  // attached during that flush.
4252  var currentFlushTimestamp = 0;
4253
4254  // Async edge case fix requires storing an event listener's attach timestamp.
4255  var getNow = Date.now;
4256
4257  // Determine what event timestamp the browser is using. Annoyingly, the
4258  // timestamp can either be hi-res (relative to page load) or low-res
4259  // (relative to UNIX epoch), so in order to compare time we have to use the
4260  // same timestamp type when saving the flush timestamp.
4261  // All IE versions use low-res event timestamps, and have problematic clock
4262  // implementations (#9632)
4263  if (inBrowser && !isIE) {
4264    var performance = window.performance;
4265    if (
4266      performance &&
4267      typeof performance.now === 'function' &&
4268      getNow() > document.createEvent('Event').timeStamp
4269    ) {
4270      // if the event timestamp, although evaluated AFTER the Date.now(), is
4271      // smaller than it, it means the event is using a hi-res timestamp,
4272      // and we need to use the hi-res version for event listener timestamps as
4273      // well.
4274      getNow = function () { return performance.now(); };
4275    }
4276  }
4277
4278  /**
4279   * Flush both queues and run the watchers.
4280   */
4281  function flushSchedulerQueue () {
4282    currentFlushTimestamp = getNow();
4283    flushing = true;
4284    var watcher, id;
4285
4286    // Sort queue before flush.
4287    // This ensures that:
4288    // 1. Components are updated from parent to child. (because parent is always
4289    //    created before the child)
4290    // 2. A component's user watchers are run before its render watcher (because
4291    //    user watchers are created before the render watcher)
4292    // 3. If a component is destroyed during a parent component's watcher run,
4293    //    its watchers can be skipped.
4294    queue.sort(function (a, b) { return a.id - b.id; });
4295
4296    // do not cache length because more watchers might be pushed
4297    // as we run existing watchers
4298    for (index = 0; index < queue.length; index++) {
4299      watcher = queue[index];
4300      if (watcher.before) {
4301        watcher.before();
4302      }
4303      id = watcher.id;
4304      has[id] = null;
4305      watcher.run();
4306      // in dev build, check and stop circular updates.
4307      if (has[id] != null) {
4308        circular[id] = (circular[id] || 0) + 1;
4309        if (circular[id] > MAX_UPDATE_COUNT) {
4310          warn(
4311            'You may have an infinite update loop ' + (
4312              watcher.user
4313                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
4314                : "in a component render function."
4315            ),
4316            watcher.vm
4317          );
4318          break
4319        }
4320      }
4321    }
4322
4323    // keep copies of post queues before resetting state
4324    var activatedQueue = activatedChildren.slice();
4325    var updatedQueue = queue.slice();
4326
4327    resetSchedulerState();
4328
4329    // call component updated and activated hooks
4330    callActivatedHooks(activatedQueue);
4331    callUpdatedHooks(updatedQueue);
4332
4333    // devtool hook
4334    /* istanbul ignore if */
4335    if (devtools && config.devtools) {
4336      devtools.emit('flush');
4337    }
4338  }
4339
4340  function callUpdatedHooks (queue) {
4341    var i = queue.length;
4342    while (i--) {
4343      var watcher = queue[i];
4344      var vm = watcher.vm;
4345      if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
4346        callHook(vm, 'updated');
4347      }
4348    }
4349  }
4350
4351  /**
4352   * Queue a kept-alive component that was activated during patch.
4353   * The queue will be processed after the entire tree has been patched.
4354   */
4355  function queueActivatedComponent (vm) {
4356    // setting _inactive to false here so that a render function can
4357    // rely on checking whether it's in an inactive tree (e.g. router-view)
4358    vm._inactive = false;

4359    activatedChildren.push(vm);
4360  }
4361
4362  function callActivatedHooks (queue) {
4363    for (var i = 0; i < queue.length; i++) {
4364      queue[i]._inactive = true;
4365      activateChildComponent(queue[i], true /* true */);
4366    }
4367  }
4368
4369  /**
4370   * Push a watcher into the watcher queue.
4371   * Jobs with duplicate IDs will be skipped unless it's
4372   * pushed when the queue is being flushed.
4373   */
4374  function queueWatcher (watcher) {
4375    var id = watcher.id;
4376    if (has[id] == null) {
4377      has[id] = true;
4378      if (!flushing) {
4379        queue.push(watcher);
4380      } else {
4381        // if already flushing, splice the watcher based on its id
4382        // if already past its id, it will be run next immediately.
4383        var i = queue.length - 1;
4384        while (i > index && queue[i].id > watcher.id) {
4385          i--;
4386        }
4387        queue.splice(i + 1, 0, watcher);
4388      }
4389      // queue the flush
4390      if (!waiting) {
4391        waiting = true;
4392
4393        if (!config.async) {
4394          flushSchedulerQueue();
4395          return
4396        }
4397        nextTick(flushSchedulerQueue);
4398      }
4399    }
4400  }
4401
4402  /*  */
4403
4404
4405
4406  var uid$2 = 0;
4407
4408  /**
4409   * A watcher parses an expression, collects dependencies,
4410   * and fires callback when the expression value changes.
4411   * This is used for both the $watch() api and directives.
4412   */
4413  var Watcher = function Watcher (
4414    vm,
4415    expOrFn,
4416    cb,
4417    options,
4418    isRenderWatcher
4419  ) {
4420    this.vm = vm;
4421    if (isRenderWatcher) {
4422      vm._watcher = this;
4423    }
4424    vm._watchers.push(this);
4425    // options
4426    if (options) {
4427      this.deep = !!options.deep;
4428      this.user = !!options.user;
4429      this.lazy = !!options.lazy;
4430      this.sync = !!options.sync;
4431      this.before = options.before;
4432    } else {
4433      this.deep = this.user = this.lazy = this.sync = false;
4434    }
4435    this.cb = cb;
4436    this.id = ++uid$2; // uid for batching
4437    this.active = true;
4438    this.dirty = this.lazy; // for lazy watchers
4439    this.deps = [];
4440    this.newDeps = [];
4441    this.depIds = new _Set();
4442    this.newDepIds = new _Set();
4443    this.expression = expOrFn.toString();
4444    // parse expression for getter
4445    if (typeof expOrFn === 'function') {
4446      this.getter = expOrFn;
4447    } else {
4448      this.getter = parsePath(expOrFn);
4449      if (!this.getter) {
4450        this.getter = noop;
4451        warn(
4452          "Failed watching path: \"" + expOrFn + "\" " +
4453          'Watcher only accepts simple dot-delimited paths. ' +
4454          'For full control, use a function instead.',
4455          vm
4456        );
4457      }
4458    }
4459    this.value = this.lazy
4460      ? undefined
4461      : this.get();
4462  };
4463
4464  /**
4465   * Evaluate the getter, and re-collect dependencies.
4466   */
4467  Watcher.prototype.get = function get () {
4468    pushTarget(this);
4469    var value;
4470    var vm = this.vm;
4471    try {
4472      value = this.getter.call(vm, vm);
4473    } catch (e) {
4474      if (this.user) {
4475        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
4476      } else {
4477        throw e
4478      }
4479    } finally {
4480      // "touch" every property so they are all tracked as
4481      // dependencies for deep watching
4482      if (this.deep) {
4483        traverse(value);
4484      }
4485      popTarget();
4486      this.cleanupDeps();
4487    }
4488    return value
4489  };
4490
4491  /**
4492   * Add a dependency to this directive.
4493   */
4494  Watcher.prototype.addDep = function addDep (dep) {
4495    var id = dep.id;
4496    if (!this.newDepIds.has(id)) {
4497      this.newDepIds.add(id);
4498      this.newDeps.push(dep);
4499      if (!this.depIds.has(id)) {
4500        dep.addSub(this);
4501      }
4502    }
4503  };
4504
4505  /**
4506   * Clean up for dependency collection.
4507   */
4508  Watcher.prototype.cleanupDeps = function cleanupDeps () {
4509    var i = this.deps.length;
4510    while (i--) {
4511      var dep = this.deps[i];
4512      if (!this.newDepIds.has(dep.id)) {
4513        dep.removeSub(this);
4514      }
4515    }
4516    var tmp = this.depIds;
4517    this.depIds = this.newDepIds;
4518    this.newDepIds = tmp;
4519    this.newDepIds.clear();
4520    tmp = this.deps;
4521    this.deps = this.newDeps;
4522    this.newDeps = tmp;
4523    this.newDeps.length = 0;
4524  };
4525
4526  /**
4527   * Subscriber interface.
4528   * Will be called when a dependency changes.
4529   */
4530  Watcher.prototype.update = function update () {
4531    /* istanbul ignore else */
4532    if (this.lazy) {
4533      this.dirty = true;
4534    } else if (this.sync) {
4535      this.run();
4536    } else {
4537      queueWatcher(this);
4538    }
4539  };
4540
4541  /**
4542   * Scheduler job interface.
4543   * Will be called by the scheduler.
4544   */
4545  Watcher.prototype.run = function run () {
4546    if (this.active) {
4547      var value = this.get();
4548      if (
4549        value !== this.value ||

4550        // Deep watchers and watchers on Object/Arrays should fire even
4551        // when the value is the same, because the value may
4552        // have mutated.
4553        isObject(value) ||
4554        this.deep
4555      ) {
4556        // set new value
4557        var oldValue = this.value;
4558        this.value = value;
4559        if (this.user) {
4560          try {
4561            this.cb.call(this.vm, value, oldValue);
4562          } catch (e) {
4563            handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
4564          }
4565        } else {
4566          this.cb.call(this.vm, value, oldValue);
4567        }
4568      }
4569    }
4570  };
4571
4572  /**
4573   * Evaluate the value of the watcher.
4574   * This only gets called for lazy watchers.
4575   */
4576  Watcher.prototype.evaluate = function evaluate () {
4577    this.value = this.get();
4578    this.dirty = false;
4579  };
4580
4581  /**
4582   * Depend on all deps collected by this watcher.
4583   */
4584  Watcher.prototype.depend = function depend () {
4585    var i = this.deps.length;
4586    while (i--) {
4587      this.deps[i].depend();
4588    }
4589  };
4590
4591  /**
4592   * Remove self from all dependencies' subscriber list.
4593   */
4594  Watcher.prototype.teardown = function teardown () {
4595    if (this.active) {
4596      // remove self from vm's watcher list
4597      // this is a somewhat expensive operation so we skip it
4598      // if the vm is being destroyed.
4599      if (!this.vm._isBeingDestroyed) {
4600        remove(this.vm._watchers, this);
4601      }
4602      var i = this.deps.length;
4603      while (i--) {
4604        this.deps[i].removeSub(this);
4605      }
4606      this.active = false;
4607    }
4608  };
4609
4610  /*  */
4611
4612  var sharedPropertyDefinition = {
4613    enumerable: true,
4614    configurable: true,
4615    get: noop,
4616    set: noop
4617  };
4618
4619  function proxy (target, sourceKey, key) {
4620    sharedPropertyDefinition.get = function proxyGetter () {
4621      return this[sourceKey][key]
4622    };
4623    sharedPropertyDefinition.set = function proxySetter (val) {
4624      this[sourceKey][key] = val;
4625    };
4626    Object.defineProperty(target, key, sharedPropertyDefinition);
4627  }
4628
4629  function initState (vm) {
4630    vm._watchers = [];
4631    var opts = vm.$options;
4632    if (opts.props) { initProps(vm, opts.props); }
4633    if (opts.methods) { initMethods(vm, opts.methods); }
4634    if (opts.data) {
4635      initData(vm);
4636    } else {
4637      observe(vm._data = {}, true /* asRootData */);
4638    }
4639    if (opts.computed) { initComputed(vm, opts.computed); }
4640    if (opts.watch && opts.watch !== nativeWatch) {
4641      initWatch(vm, opts.watch);
4642    }
4643  }
4644
4645  function initProps (vm, propsOptions) {
4646    var propsData = vm.$options.propsData || {};
4647    var props = vm._props = {};
4648    // cache prop keys so that future props updates can iterate using Array
4649    // instead of dynamic object key enumeration.
4650    var keys = vm.$options._propKeys = [];
4651    var isRoot = !vm.$parent;
4652    // root instance props should be converted
4653    if (!isRoot) {
4654      toggleObserving(false);
4655    }
4656    var loop = function ( key ) {
4657      keys.push(key);
4658      var value = validateProp(key, propsOptions, propsData, vm);
4659      /* istanbul ignore else */
4660      {
4661        var hyphenatedKey = hyphenate(key);
4662        if (isReservedAttribute(hyphenatedKey) ||
4663            config.isReservedAttr(hyphenatedKey)) {
4664          warn(
4665            ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
4666            vm
4667          );
4668        }
4669        defineReactive$$1(props, key, value, function () {
4670          if (!isRoot && !isUpdatingChildComponent) {
4671            warn(
4672              "Avoid mutating a prop directly since the value will be " +
4673              "overwritten whenever the parent component re-renders. " +
4674              "Instead, use a data or computed property based on the prop's " +
4675              "value. Prop being mutated: \"" + key + "\"",
4676              vm
4677            );
4678          }
4679        });
4680      }
4681      // static props are already proxied on the component's prototype
4682      // during Vue.extend(). We only need to proxy props defined at
4683      // instantiation here.
4684      if (!(key in vm)) {
4685        proxy(vm, "_props", key);
4686      }
4687    };
4688
4689    for (var key in propsOptions) loop( key );
4690    toggleObserving(true);
4691  }
4692
4693  function initData (vm) {
4694    var data = vm.$options.data;
4695    data = vm._data = typeof data === 'function'
4696      ? getData(data, vm)
4697      : data || {};
4698    if (!isPlainObject(data)) {
4699      data = {};
4700      warn(
4701        'data functions should return an object:\n' +
4702        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
4703        vm
4704      );
4705    }
4706    // proxy data on instance
4707    var keys = Object.keys(data);
4708    var props = vm.$options.props;
4709    var methods = vm.$options.methods;
4710    var i = keys.length;
4711    while (i--) {
4712      var key = keys[i];
4713      {
4714        if (methods && hasOwn(methods, key)) {
4715          warn(
4716            ("Method \"" + key + "\" has already been defined as a data property."),
4717            vm
4718          );
4719        }
4720      }
4721      if (props && hasOwn(props, key)) {
4722        warn(
4723          "The data property \"" + key + "\" is already declared as a prop. " +
4724          "Use prop default value instead.",
4725          vm
4726        );
4727      } else if (!isReserved(key)) {
4728        proxy(vm, "_data", key);
4729      }
4730    }
4731    // observe data
4732    observe(data, true /* asRootData */);
4733  }
4734
4735  function getData (data, vm) {
4736    // #7573 disable dep collection when invoking data getters
4737    pushTarget();
4738    try {
4739      return data.call(vm, vm)
4740    } catch (e) {
4741      handleError(e, vm, "data()");
4742      return {}
4743    } finally {
4744      popTarget();
4745    }
4746  }
4747
4748  var computedWatcherOptions = { lazy: true };
4749
4750  function initComputed (vm, computed) {
4751    // $flow-disable-line
4752    var watchers = vm._computedWatchers = Object.create(null);
4753    // computed properties are just getters during SSR
4754    var isSSR = isServerRendering();
4755
4756    for (var key in computed) {
4757      var userDef = computed[key];
4758      var getter = typeof userDef === 'function' ? userDef : userDef.get;
4759      if (getter == null) {
4760        warn(
4761          ("Getter is missing for computed property \"" + key + "\"."),
4762          vm
4763        );
4764      }
4765
4766      if (!isSSR) {
4767        // create internal watcher for the computed property.
4768        watchers[key] = new Watcher(
4769          vm,
4770          getter || noop,
4771          noop,
4772          computedWatcherOptions
4773        );
4774      }
4775
4776      // component-defined computed properties are already defined on the
4777      // component prototype. We only need to define computed properties defined
4778      // at instantiation here.
4779      if (!(key in vm)) {
4780        defineComputed(vm, key, userDef);
4781      } else {
4782        if (key in vm.$data) {
4783          warn(("The computed property \"" + key + "\" is already defined in data."), vm);
4784        } else if (vm.$options.props && key in vm.$options.props) {
4785          warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
4786        }
4787      }
4788    }
4789  }
4790
4791  function defineComputed (
4792    target,
4793    key,
4794    userDef
4795  ) {
4796    var shouldCache = !isServerRendering();
4797    if (typeof userDef === 'function') {
4798      sharedPropertyDefinition.get = shouldCache
4799        ? createComputedGetter(key)
4800        : createGetterInvoker(userDef);
4801      sharedPropertyDefinition.set = noop;
4802    } else {
4803      sharedPropertyDefinition.get = userDef.get
4804        ? shouldCache && userDef.cache !== false
4805          ? createComputedGetter(key)
4806          : createGetterInvoker(userDef.get)
4807        : noop;
4808      sharedPropertyDefinition.set = userDef.set || noop;
4809    }
4810    if (sharedPropertyDefinition.set === noop) {
4811      sharedPropertyDefinition.set = function () {
4812        warn(
4813          ("Computed property \"" + key + "\" was assigned to but it has no setter."),
4814          this
4815        );
4816      };
4817    }
4818    Object.defineProperty(target, key, sharedPropertyDefinition);
4819  }
4820
4821  function createComputedGetter (key) {
4822    return function computedGetter () {
4823      var watcher = this._computedWatchers && this._computedWatchers[key];
4824      if (watcher) {
4825        if (watcher.dirty) {
4826          watcher.evaluate();
4827        }
4828        if (Dep.target) {

4829          watcher.depend();
4830        }
4831        return watcher.value
4832      }
4833    }
4834  }
4835
4836  function createGetterInvoker(fn) {
4837    return function computedGetter () {
4838      return fn.call(this, this)
4839    }
4840  }
4841
4842  function initMethods (vm, methods) {
4843    var props = vm.$options.props;
4844    for (var key in methods) {
4845      {
4846        if (typeof methods[key] !== 'function') {
4847          warn(
4848            "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
4849            "Did you reference the function correctly?",
4850            vm
4851          );
4852        }
4853        if (props && hasOwn(props, key)) {
4854          warn(
4855            ("Method \"" + key + "\" has already been defined as a prop."),
4856            vm
4857          );
4858        }
4859        if ((key in vm) && isReserved(key)) {
4860          warn(
4861            "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
4862            "Avoid defining component methods that start with _ or $."
4863          );
4864        }
4865      }
4866      vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
4867    }
4868  }
4869
4870  function initWatch (vm, watch) {
4871    for (var key in watch) {
4872      var handler = watch[key];
4873      if (Array.isArray(handler)) {
4874        for (var i = 0; i < handler.length; i++) {
4875          createWatcher(vm, key, handler[i]);
4876        }
4877      } else {
4878        createWatcher(vm, key, handler);
4879      }
4880    }
4881  }
4882
4883  function createWatcher (
4884    vm,
4885    expOrFn,
4886    handler,
4887    options
4888  ) {
4889    if (isPlainObject(handler)) {
4890      options = handler;
4891      handler = handler.handler;
4892    }
4893    if (typeof handler === 'string') {
4894      handler = vm[handler];
4895    }
4896    return vm.$watch(expOrFn, handler, options)
4897  }
4898
4899  function stateMixin (Vue) {
4900    // flow somehow has problems with directly declared definition object
4901    // when using Object.defineProperty, so we have to procedurally build up
4902    // the object here.
4903    var dataDef = {};
4904    dataDef.get = function () { return this._data };
4905    var propsDef = {};
4906    propsDef.get = function () { return this._props };
4907    {
4908      dataDef.set = function () {
4909        warn(
4910          'Avoid replacing instance root $data. ' +
4911          'Use nested data properties instead.',
4912          this
4913        );
4914      };
4915      propsDef.set = function () {
4916        warn("$props is readonly.", this);
4917      };
4918    }
4919    Object.defineProperty(Vue.prototype, '$data', dataDef);
4920    Object.defineProperty(Vue.prototype, '$props', propsDef);
4921
4922    Vue.prototype.$set = set;
4923    Vue.prototype.$delete = del;
4924
4925    Vue.prototype.$watch = function (
4926      expOrFn,
4927      cb,
4928      options
4929    ) {
4930      var vm = this;
4931      if (isPlainObject(cb)) {
4932        return createWatcher(vm, expOrFn, cb, options)
4933      }
4934      options = options || {};
4935      options.user = true;
4936      var watcher = new Watcher(vm, expOrFn, cb, options);
4937      if (options.immediate) {
4938        try {
4939          cb.call(vm, watcher.value);
4940        } catch (error) {
4941          handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
4942        }
4943      }
4944      return function unwatchFn () {
4945        watcher.teardown();
4946      }
4947    };
4948  }
4949
4950  /*  */
4951
4952  var uid$3 = 0;
4953
4954  function initMixin (Vue) {
4955    Vue.prototype._init = function (options) {
4956      var vm = this;
4957      // a uid
4958      vm._uid = uid$3++;
4959
4960      var startTag, endTag;
4961      /* istanbul ignore if */
4962      if (config.performance && mark) {
4963        startTag = "vue-perf-start:" + (vm._uid);
4964        endTag = "vue-perf-end:" + (vm._uid);
4965        mark(startTag);
4966      }
4967
4968      // a flag to avoid this being observed
4969      vm._isVue = true;
4970      // merge options
4971      if (options && options._isComponent) {
4972        // optimize internal component instantiation
4973        // since dynamic options merging is pretty slow, and none of the
4974        // internal component options needs special treatment.
4975        initInternalComponent(vm, options);
4976      } else {
4977        vm.$options = mergeOptions(
4978          resolveConstructorOptions(vm.constructor),
4979          options || {},
4980          vm
4981        );
4982      }
4983      /* istanbul ignore else */
4984      {
4985        initProxy(vm);
4986      }
4987      // expose real self
4988      vm._self = vm;
4989      initLifecycle(vm);
4990      initEvents(vm);
4991      initRender(vm);
4992      callHook(vm, 'beforeCreate');
4993      initInjections(vm); // resolve injections before data/props
4994      initState(vm);
4995      initProvide(vm); // resolve provide after data/props
4996      callHook(vm, 'created');
4997
4998      /* istanbul ignore if */
4999      if (config.performance && mark) {
5000        vm._name = formatComponentName(vm, false);
5001        mark(endTag);
5002        measure(("vue " + (vm._name) + " init"), startTag, endTag);
5003      }
5004
5005      if (vm.$options.el) {
5006        vm.$mount(vm.$options.el);
5007      }
5008    };
5009  }
5010
5011  function initInternalComponent (vm, options) {
5012    var opts = vm.$options = Object.create(vm.constructor.options);
5013    // doing this because it's faster than dynamic enumeration.
5014    var parentVnode = options._parentVnode;
5015    opts.parent = options.parent;
5016    opts._parentVnode = parentVnode;
5017
5018    var vnodeComponentOptions = parentVnode.componentOptions;
5019    opts.propsData = vnodeComponentOptions.propsData;
5020    opts._parentListeners = vnodeComponentOptions.listeners;
5021    opts._renderChildren = vnodeComponentOptions.children;
5022    opts._componentTag = vnodeComponentOptions.tag;
5023
5024    if (options.render) {
5025      opts.render = options.render;
5026      opts.staticRenderFns = options.staticRenderFns;
5027    }
5028  }
5029

5030  function resolveConstructorOptions (Ctor) {
5031    var options = Ctor.options;
5032    if (Ctor.super) {
5033      var superOptions = resolveConstructorOptions(Ctor.super);
5034      var cachedSuperOptions = Ctor.superOptions;
5035      if (superOptions !== cachedSuperOptions) {
5036        // super option changed,
5037        // need to resolve new options.
5038        Ctor.superOptions = superOptions;
5039        // check if there are any late-modified/attached options (#4976)
5040        var modifiedOptions = resolveModifiedOptions(Ctor);
5041        // update base extend options
5042        if (modifiedOptions) {
5043          extend(Ctor.extendOptions, modifiedOptions);
5044        }
5045        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
5046        if (options.name) {
5047          options.components[options.name] = Ctor;
5048        }
5049      }
5050    }
5051    return options
5052  }
5053
5054  function resolveModifiedOptions (Ctor) {
5055    var modified;
5056    var latest = Ctor.options;
5057    var sealed = Ctor.sealedOptions;
5058    for (var key in latest) {
5059      if (latest[key] !== sealed[key]) {
5060        if (!modified) { modified = {}; }
5061        modified[key] = latest[key];
5062      }
5063    }
5064    return modified
5065  }
5066
5067  function Vue (options) {
5068    if (!(this instanceof Vue)
5069    ) {
5070      warn('Vue is a constructor and should be called with the `new` keyword');
5071    }
5072    this._init(options);
5073  }
5074
5075  initMixin(Vue);
5076  stateMixin(Vue);
5077  eventsMixin(Vue);
5078  lifecycleMixin(Vue);
5079  renderMixin(Vue);
5080
5081  /*  */
5082
5083  function initUse (Vue) {
5084    Vue.use = function (plugin) {
5085      var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
5086      if (installedPlugins.indexOf(plugin) > -1) {
5087        return this
5088      }
5089
5090      // additional parameters
5091      var args = toArray(arguments, 1);
5092      args.unshift(this);
5093      if (typeof plugin.install === 'function') {
5094        plugin.install.apply(plugin, args);
5095      } else if (typeof plugin === 'function') {
5096        plugin.apply(null, args);
5097      }
5098      installedPlugins.push(plugin);
5099      return this
5100    };
5101  }
5102
5103  /*  */
5104
5105  function initMixin$1 (Vue) {
5106    Vue.mixin = function (mixin) {
5107      this.options = mergeOptions(this.options, mixin);
5108      return this
5109    };
5110  }
5111
5112  /*  */
5113
5114  function initExtend (Vue) {
5115    /**
5116     * Each instance constructor, including Vue, has a unique
5117     * cid. This enables us to create wrapped "child
5118     * constructors" for prototypal inheritance and cache them.
5119     */
5120    Vue.cid = 0;
5121    var cid = 1;
5122
5123    /**
5124     * Class inheritance
5125     */
5126    Vue.extend = function (extendOptions) {
5127      extendOptions = extendOptions || {};
5128      var Super = this;
5129      var SuperId = Super.cid;
5130      var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
5131      if (cachedCtors[SuperId]) {
5132        return cachedCtors[SuperId]
5133      }
5134
5135      var name = extendOptions.name || Super.options.name;
5136      if (name) {
5137        validateComponentName(name);
5138      }
5139
5140      var Sub = function VueComponent (options) {
5141        this._init(options);
5142      };
5143      Sub.prototype = Object.create(Super.prototype);
5144      Sub.prototype.constructor = Sub;
5145      Sub.cid = cid++;
5146      Sub.options = mergeOptions(
5147        Super.options,
5148        extendOptions
5149      );
5150      Sub['super'] = Super;
5151
5152      // For props and computed properties, we define the proxy getters on
5153      // the Vue instances at extension time, on the extended prototype. This
5154      // avoids Object.defineProperty calls for each instance created.
5155      if (Sub.options.props) {
5156        initProps$1(Sub);
5157      }
5158      if (Sub.options.computed) {
5159        initComputed$1(Sub);
5160      }
5161
5162      // allow further extension/mixin/plugin usage
5163      Sub.extend = Super.extend;
5164      Sub.mixin = Super.mixin;
5165      Sub.use = Super.use;
5166
5167      // create asset registers, so extended classes
5168      // can have their private assets too.
5169      ASSET_TYPES.forEach(function (type) {
5170        Sub[type] = Super[type];
5171      });
5172      // enable recursive self-lookup
5173      if (name) {
5174        Sub.options.components[name] = Sub;
5175      }
5176
5177      // keep a reference to the super options at extension time.
5178      // later at instantiation we can check if Super's options have
5179      // been updated.
5180      Sub.superOptions = Super.options;
5181      Sub.extendOptions = extendOptions;
5182      Sub.sealedOptions = extend({}, Sub.options);
5183

5184      // cache constructor
5185      cachedCtors[SuperId] = Sub;
5186      return Sub
5187    };
5188  }
5189
5190  function initProps$1 (Comp) {
5191    var props = Comp.options.props;
5192    for (var key in props) {
5193      proxy(Comp.prototype, "_props", key);
5194    }
5195  }
5196
5197  function initComputed$1 (Comp) {
5198    var computed = Comp.options.computed;
5199    for (var key in computed) {
5200      defineComputed(Comp.prototype, key, computed[key]);
5201    }
5202  }
5203
5204  /*  */
5205
5206  function initAssetRegisters (Vue) {
5207    /**
5208     * Create asset registration methods.
5209     */
5210    ASSET_TYPES.forEach(function (type) {
5211      Vue[type] = function (
5212        id,
5213        definition
5214      ) {
5215        if (!definition) {
5216          return this.options[type + 's'][id]
5217        } else {
5218          /* istanbul ignore if */
5219          if (type === 'component') {
5220            validateComponentName(id);
5221          }
5222          if (type === 'component' && isPlainObject(definition)) {
5223            definition.name = definition.name || id;
5224            definition = this.options._base.extend(definition);
5225          }
5226          if (type === 'directive' && typeof definition === 'function') {
5227            definition = { bind: definition, update: definition };
5228          }
5229          this.options[type + 's'][id] = definition;
5230          return definition
5231        }
5232      };
5233    });
5234  }
5235
5236  /*  */
5237
5238
5239
5240  function getComponentName (opts) {
5241    return opts && (opts.Ctor.options.name || opts.tag)
5242  }
5243
5244  function matches (pattern, name) {
5245    if (Array.isArray(pattern)) {
5246      return pattern.indexOf(name) > -1
5247    } else if (typeof pattern === 'string') {
5248      return pattern.split(',').indexOf(name) > -1
5249    } else if (isRegExp(pattern)) {
5250      return pattern.test(name)
5251    }
5252    /* istanbul ignore next */
5253    return false
5254  }
5255
5256  function pruneCache (keepAliveInstance, filter) {
5257    var cache = keepAliveInstance.cache;
5258    var keys = keepAliveInstance.keys;
5259    var _vnode = keepAliveInstance._vnode;
5260    for (var key in cache) {
5261      var cachedNode = cache[key];
5262      if (cachedNode) {
5263        var name = getComponentName(cachedNode.componentOptions);
5264        if (name && !filter(name)) {
5265          pruneCacheEntry(cache, key, keys, _vnode);
5266        }
5267      }
5268    }
5269  }
5270
5271  function pruneCacheEntry (
5272    cache,
5273    key,
5274    keys,
5275    current
5276  ) {
5277    var cached$$1 = cache[key];
5278    if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
5279      cached$$1.componentInstance.$destroy();
5280    }
5281    cache[key] = null;
5282    remove(keys, key);
5283  }
5284
5285  var patternTypes = [String, RegExp, Array];
5286
5287  var KeepAlive = {
5288    name: 'keep-alive',
5289    abstract: true,
5290
5291    props: {
5292      include: patternTypes,
5293      exclude: patternTypes,
5294      max: [String, Number]
5295    },
5296
5297    created: function created () {
5298      this.cache = Object.create(null);
5299      this.keys = [];
5300    },
5301
5302    destroyed: function destroyed () {
5303      for (var key in this.cache) {
5304        pruneCacheEntry(this.cache, key, this.keys);
5305      }
5306    },
5307
5308    mounted: function mounted () {
5309      var this$1 = this;
5310
5311      this.$watch('include', function (val) {
5312        pruneCache(this$1, function (name) { return matches(val, name); });
5313      });
5314      this.$watch('exclude', function (val) {
5315        pruneCache(this$1, function (name) { return !matches(val, name); });
5316      });
5317    },
5318
5319    render: function render () {
5320      var slot = this.$slots.default;
5321      var vnode = getFirstComponentChild(slot);
5322      var componentOptions = vnode && vnode.componentOptions;
5323      if (componentOptions) {
5324        // check pattern
5325        var name = getComponentName(componentOptions);
5326        var ref = this;
5327        var include = ref.include;
5328        var exclude = ref.exclude;
5329        if (
5330          // not included
5331          (include && (!name || !matches(include, name))) ||
5332          // excluded
5333          (exclude && name && matches(exclude, name))
5334        ) {
5335          return vnode
5336        }
5337
5338        var ref$1 = this;
5339        var cache = ref$1.cache;
5340        var keys = ref$1.keys;
5341        var key = vnode.key == null
5342          // same constructor may get registered as different local components
5343          // so cid alone is not enough (#3269)
5344          ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
5345          : vnode.key;
5346        if (cache[key]) {

5347          vnode.componentInstance = cache[key].componentInstance;
5348          // make current key freshest
5349          remove(keys, key);
5350          keys.push(key);
5351        } else {
5352          cache[key] = vnode;
5353          keys.push(key);
5354          // prune oldest entry
5355          if (this.max && keys.length > parseInt(this.max)) {
5356            pruneCacheEntry(cache, keys[0], keys, this._vnode);
5357          }
5358        }
5359
5360        vnode.data.keepAlive = true;
5361      }
5362      return vnode || (slot && slot[0])
5363    }
5364  };
5365
5366  var builtInComponents = {
5367    KeepAlive: KeepAlive
5368  };
5369
5370  /*  */
5371
5372  function initGlobalAPI (Vue) {
5373    // config
5374    var configDef = {};
5375    configDef.get = function () { return config; };
5376    {
5377      configDef.set = function () {
5378        warn(
5379          'Do not replace the Vue.config object, set individual fields instead.'
5380        );
5381      };
5382    }
5383    Object.defineProperty(Vue, 'config', configDef);
5384
5385    // exposed util methods.
5386    // NOTE: these are not considered part of the public API - avoid relying on
5387    // them unless you are aware of the risk.
5388    Vue.util = {
5389      warn: warn,
5390      extend: extend,
5391      mergeOptions: mergeOptions,
5392      defineReactive: defineReactive$$1
5393    };
5394
5395    Vue.set = set;
5396    Vue.delete = del;
5397    Vue.nextTick = nextTick;
5398
5399    // 2.6 explicit observable API
5400    Vue.observable = function (obj) {
5401      observe(obj);
5402      return obj
5403    };
5404
5405    Vue.options = Object.create(null);
5406    ASSET_TYPES.forEach(function (type) {
5407      Vue.options[type + 's'] = Object.create(null);
5408    });
5409
5410    // this is used to identify the "base" constructor to extend all plain-object
5411    // components with in Weex's multi-instance scenarios.
5412    Vue.options._base = Vue;
5413
5414    extend(Vue.options.components, builtInComponents);
5415
5416    initUse(Vue);
5417    initMixin$1(Vue);
5418    initExtend(Vue);
5419    initAssetRegisters(Vue);
5420  }
5421
5422  initGlobalAPI(Vue);
5423
5424  Object.defineProperty(Vue.prototype, '$isServer', {
5425    get: isServerRendering
5426  });
5427
5428  Object.defineProperty(Vue.prototype, '$ssrContext', {
5429    get: function get () {
5430      /* istanbul ignore next */
5431      return this.$vnode && this.$vnode.ssrContext
5432    }
5433  });
5434
5435  // expose FunctionalRenderContext for ssr runtime helper installation
5436  Object.defineProperty(Vue, 'FunctionalRenderContext', {
5437    value: FunctionalRenderContext
5438  });
5439
5440  Vue.version = '2.6.10';
5441
5442  /*  */
5443
5444  // these are reserved for web because they are directly compiled away
5445  // during template compilation
5446  var isReservedAttr = makeMap('style,class');
5447
5448  // attributes that should be using props for binding
5449  var acceptValue = makeMap('input,textarea,option,select,progress');
5450  var mustUseProp = function (tag, type, attr) {
5451    return (
5452      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
5453      (attr === 'selected' && tag === 'option') ||
5454      (attr === 'checked' && tag === 'input') ||
5455      (attr === 'muted' && tag === 'video')
5456    )
5457  };
5458
5459  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
5460
5461  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
5462
5463  var convertEnumeratedValue = function (key, value) {
5464    return isFalsyAttrValue(value) || value === 'false'
5465      ? 'false'
5466      // allow arbitrary string value for contenteditable
5467      : key === 'contenteditable' && isValidContentEditableValue(value)
5468        ? value
5469        : 'true'
5470  };
5471
5472  var isBooleanAttr = makeMap(
5473    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
5474    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
5475    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
5476    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
5477    'required,reversed,scoped,seamless,selected,sortable,translate,' +
5478    'truespeed,typemustmatch,visible'
5479  );
5480
5481  var xlinkNS = 'http://www.w3.org/1999/xlink';
5482
5483  var isXlink = function (name) {
5484    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
5485  };
5486
5487  var getXlinkProp = function (name) {
5488    return isXlink(name) ? name.slice(6, name.length) : ''
5489  };
5490
5491  var isFalsyAttrValue = function (val) {
5492    return val == null || val === false
5493  };
5494
5495  /*  */
5496
5497  function genClassForVnode (vnode) {
5498    var data = vnode.data;
5499    var parentNode = vnode;
5500    var childNode = vnode;
5501    while (isDef(childNode.componentInstance)) {
5502      childNode = childNode.componentInstance._vnode;
5503      if (childNode && childNode.data) {
5504        data = mergeClassData(childNode.data, data);
5505      }
5506    }
5507    while (isDef(parentNode = parentNode.parent)) {
5508      if (parentNode && parentNode.data) {
5509        data = mergeClassData(data, parentNode.data);
5510      }
5511    }
5512    return renderClass(data.staticClass, data.class)
5513  }
5514
5515  function mergeClassData (child, parent) {
5516    return {
5517      staticClass: concat(child.staticClass, parent.staticClass),
5518      class: isDef(child.class)
5519        ? [child.class, parent.class]
5520        : parent.class
5521    }
5522  }
5523
5524  function renderClass (
5525    staticClass,
5526    dynamicClass
5527  ) {
5528    if (isDef(staticClass) || isDef(dynamicClass)) {
5529      return concat(staticClass, stringifyClass(dynamicClass))
5530    }
5531    /* istanbul ignore next */
5532    return ''
5533  }
5534
5535  function concat (a, b) {
5536    return a ? b ? (a + ' ' + b) : a : (b || '')
5537  }
5538
5539  function stringifyClass (value) {
5540    if (Array.isArray(value)) {
5541      return stringifyArray(value)
5542    }
5543    if (isObject(value)) {
5544      return stringifyObject(value)
5545    }
5546    if (typeof value === 'string') {
5547      return value
5548    }
5549    /* istanbul ignore next */
5550    return ''
5551  }
5552
5553  function stringifyArray (value) {
5554    var res = '';
5555    var stringified;
5556    for (var i = 0, l = value.length; i < l; i++) {
5557      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
5558        if (res) { res += ' '; }
5559        res += stringified;
5560      }
5561    }
5562    return res
5563  }
5564
5565  function stringifyObject (value) {
5566    var res = '';
5567    for (var key in value) {
5568      if (value[key]) {
5569        if (res) { res += ' '; }
5570        res += key;
5571      }
5572    }
5573    return res
5574  }
5575
5576  /*  */
5577
5578  var namespaceMap = {
5579    svg: 'http://www.w3.org/2000/svg',
5580    math: 'http://www.w3.org/1998/Math/MathML'
5581  };
5582
5583  var isHTMLTag = makeMap(
5584    'html,body,base,head,link,meta,style,title,' +
5585    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
5586    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
5587    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
5588    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
5589    'embed,object,param,source,canvas,script,noscript,del,ins,' +
5590    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
5591    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
5592    'output,progress,select,textarea,' +
5593    'details,dialog,menu,menuitem,summary,' +
5594    'content,element,shadow,template,blockquote,iframe,tfoot'
5595  );
5596
5597  // this map is intentionally selective, only covering SVG elements that may
5598  // contain child elements.
5599  var isSVG = makeMap(
5600    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
5601    'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
5602    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
5603    true
5604  );
5605
5606  var isPreTag = function (tag) { return tag === 'pre'; };
5607
5608  var isReservedTag = function (tag) {
5609    return isHTMLTag(tag) || isSVG(tag)
5610  };
5611
5612  function getTagNamespace (tag) {
5613    if (isSVG(tag)) {
5614      return 'svg'
5615    }
5616    // basic support for MathML
5617    // note it doesn't support other MathML elements being component roots
5618    if (tag === 'math') {
5619      return 'math'
5620    }
5621  }
5622
5623  var unknownElementCache = Object.create(null);
5624  function isUnknownElement (tag) {
5625    /* istanbul ignore if */
5626    if (!inBrowser) {
5627      return true
5628    }
5629    if (isReservedTag(tag)) {
5630      return false
5631    }
5632    tag = tag.toLowerCase();
5633    /* istanbul ignore if */
5634    if (unknownElementCache[tag] != null) {
5635      return unknownElementCache[tag]
5636    }
5637    var el = document.createElement(tag);
5638    if (tag.indexOf('-') > -1) {
5639      // http://stackoverflow.com/a/28210364/1070244
5640      return (unknownElementCache[tag] = (
5641        el.constructor === window.HTMLUnknownElement ||
5642        el.constructor === window.HTMLElement
5643      ))
5644    } else {
5645      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
5646    }
5647  }
5648
5649  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
5650
5651  /*  */
5652
5653  /**
5654   * Query an element selector if it's not an element already.
5655   */
5656  function query (el) {
5657    if (typeof el === 'string') {
5658      var selected = document.querySelector(el);
5659      if (!selected) {
5660        warn(
5661          'Cannot find element: ' + el
5662        );
5663        return document.createElement('div')
5664      }
5665      return selected
5666    } else {
5667      return el
5668    }
5669  }
5670
5671  /*  */
5672
5673  function createElement$1 (tagName, vnode) {
5674    var elm = document.createElement(tagName);
5675    if (tagName !== 'select') {
5676      return elm
5677    }
5678    // false or null will remove the attribute but undefined will not
5679    if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
5680      elm.setAttribute('multiple', 'multiple');
5681    }
5682    return elm
5683  }
5684
5685  function createElementNS (namespace, tagName) {
5686    return document.createElementNS(namespaceMap[namespace], tagName)
5687  }
5688
5689  function createTextNode (text) {
5690    return document.createTextNode(text)
5691  }
5692
5693  function createComment (text) {
5694    return document.createComment(text)
5695  }
5696
5697  function insertBefore (parentNode, newNode, referenceNode) {
5698    parentNode.insertBefore(newNode, referenceNode);
5699  }
5700
5701  function removeChild (node, child) {
5702    node.removeChild(child);
5703  }
5704
5705  function appendChild (node, child) {
5706    node.appendChild(child);
5707  }
5708
5709  function parentNode (node) {
5710    return node.parentNode
5711  }
5712
5713  function nextSibling (node) {
5714    return node.nextSibling
5715  }
5716
5717  function tagName (node) {
5718    return node.tagName
5719  }
5720
5721  function setTextContent (node, text) {
5722    node.textContent = text;
5723  }
5724
5725  function setStyleScope (node, scopeId) {
5726    node.setAttribute(scopeId, '');
5727  }
5728
5729  var nodeOps = /*#__PURE__*/Object.freeze({
5730    createElement: createElement$1,
5731    createElementNS: createElementNS,
5732    createTextNode: createTextNode,
5733    createComment: createComment,
5734    insertBefore: insertBefore,
5735    removeChild: removeChild,
5736    appendChild: appendChild,
5737    parentNode: parentNode,
5738    nextSibling: nextSibling,
5739    tagName: tagName,
5740    setTextContent: setTextContent,
5741    setStyleScope: setStyleScope
5742  });
5743
5744  /*  */
5745
5746  var ref = {
5747    create: function create (_, vnode) {
5748      registerRef(vnode);
5749    },
5750    update: function update (oldVnode, vnode) {
5751      if (oldVnode.data.ref !== vnode.data.ref) {
5752        registerRef(oldVnode, true);
5753        registerRef(vnode);
5754      }
5755    },
5756    destroy: function destroy (vnode) {
5757      registerRef(vnode, true);
5758    }
5759  };
5760
5761  function registerRef (vnode, isRemoval) {
5762    var key = vnode.data.ref;
5763    if (!isDef(key)) { return }
5764
5765    var vm = vnode.context;
5766    var ref = vnode.componentInstance || vnode.elm;
5767    var refs = vm.$refs;
5768    if (isRemoval) {
5769      if (Array.isArray(refs[key])) {
5770        remove(refs[key], ref);
5771      } else if (refs[key] === ref) {
5772        refs[key] = undefined;
5773      }
5774    } else {
5775      if (vnode.data.refInFor) {
5776        if (!Array.isArray(refs[key])) {
5777          refs[key] = [ref];
5778        } else if (refs[key].indexOf(ref) < 0) {
5779          // $flow-disable-line
5780          refs[key].push(ref);
5781        }
5782      } else {
5783        refs[key] = ref;
5784      }
5785    }
5786  }
5787
5788  /**
5789   * Virtual DOM patching algorithm based on Snabbdom by
5790   * Simon Friis Vindum (@paldepind)
5791   * Licensed under the MIT License
5792   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
5793   *
5794   * modified by Evan You (@yyx990803)
5795   *
5796   * Not type-checking this because this file is perf-critical and the cost
5797   * of making flow understand it is not worth it.
5798   */
5799
5800  var emptyNode = new VNode('', {}, []);
5801
5802  var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
5803
5804  function sameVnode (a, b) {
5805    return (

5806      a.key === b.key && (
5807        (
5808          a.tag === b.tag &&
5809          a.isComment === b.isComment &&
5810          isDef(a.data) === isDef(b.data) &&
5811          sameInputType(a, b)
5812        ) || (
5813          isTrue(a.isAsyncPlaceholder) &&
5814          a.asyncFactory === b.asyncFactory &&
5815          isUndef(b.asyncFactory.error)
5816        )
5817      )
5818    )
5819  }
5820
5821  function sameInputType (a, b) {
5822    if (a.tag !== 'input') { return true }
5823    var i;
5824    var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
5825    var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
5826    return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
5827  }
5828
5829  function createKeyToOldIdx (children, beginIdx, endIdx) {
5830    var i, key;
5831    var map = {};
5832    for (i = beginIdx; i <= endIdx; ++i) {
5833      key = children[i].key;
5834      if (isDef(key)) { map[key] = i; }
5835    }
5836    return map
5837  }
5838
5839  function createPatchFunction (backend) {
5840    var i, j;
5841    var cbs = {};
5842
5843    var modules = backend.modules;
5844    var nodeOps = backend.nodeOps;
5845
5846    for (i = 0; i < hooks.length; ++i) {
5847      cbs[hooks[i]] = [];
5848      for (j = 0; j < modules.length; ++j) {
5849        if (isDef(modules[j][hooks[i]])) {
5850          cbs[hooks[i]].push(modules[j][hooks[i]]);
5851        }
5852      }
5853    }
5854
5855    function emptyNodeAt (elm) {
5856      return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
5857    }
5858
5859    function createRmCb (childElm, listeners) {
5860      function remove$$1 () {
5861        if (--remove$$1.listeners === 0) {
5862          removeNode(childElm);
5863        }
5864      }
5865      remove$$1.listeners = listeners;
5866      return remove$$1
5867    }
5868
5869    function removeNode (el) {
5870      var parent = nodeOps.parentNode(el);
5871      // element may have already been removed due to v-html / v-text
5872      if (isDef(parent)) {
5873        nodeOps.removeChild(parent, el);
5874      }
5875    }
5876
5877    function isUnknownElement$$1 (vnode, inVPre) {
5878      return (
5879        !inVPre &&
5880        !vnode.ns &&
5881        !(
5882          config.ignoredElements.length &&
5883          config.ignoredElements.some(function (ignore) {
5884            return isRegExp(ignore)
5885              ? ignore.test(vnode.tag)
5886              : ignore === vnode.tag
5887          })
5888        ) &&
5889        config.isUnknownElement(vnode.tag)
5890      )
5891    }
5892
5893    var creatingElmInVPre = 0;
5894
5895    function createElm (
5896      vnode,
5897      insertedVnodeQueue,
5898      parentElm,
5899      refElm,
5900      nested,
5901      ownerArray,
5902      index
5903    ) {

5904      if (isDef(vnode.elm) && isDef(ownerArray)) {
5905        // This vnode was used in a previous render!
5906        // now it's used as a new node, overwriting its elm would cause
5907        // potential patch errors down the road when it's used as an insertion
5908        // reference node. Instead, we clone the node on-demand before creating
5909        // associated DOM element for it.
5910        vnode = ownerArray[index] = cloneVNode(vnode);
5911      }
5912
5913      vnode.isRootInsert = !nested; // for transition enter check
5914      if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
5915        return
5916      }
5917
5918      var data = vnode.data;
5919      var children = vnode.children;
5920      var tag = vnode.tag;
5921      if (isDef(tag)) {
5922        {
5923          if (data && data.pre) {
5924            creatingElmInVPre++;
5925          }
5926          if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
5927            warn(
5928              'Unknown custom element: <' + tag + '> - did you ' +
5929              'register the component correctly? For recursive components, ' +
5930              'make sure to provide the "name" option.',
5931              vnode.context
5932            );
5933          }
5934        }
5935
5936        vnode.elm = vnode.ns
5937          ? nodeOps.createElementNS(vnode.ns, tag)
5938          : nodeOps.createElement(tag, vnode);
5939        setScope(vnode);
5940
5941        /* istanbul ignore if */
5942        {
5943          createChildren(vnode, children, insertedVnodeQueue);
5944          if (isDef(data)) {
5945            invokeCreateHooks(vnode, insertedVnodeQueue);
5946          }
5947          insert(parentElm, vnode.elm, refElm);
5948        }
5949
5950        if (data && data.pre) {
5951          creatingElmInVPre--;
5952        }
5953      } else if (isTrue(vnode.isComment)) {
5954        vnode.elm = nodeOps.createComment(vnode.text);
5955        insert(parentElm, vnode.elm, refElm);
5956      } else {
5957        vnode.elm = nodeOps.createTextNode(vnode.text);
5958        insert(parentElm, vnode.elm, refElm);
5959      }
5960    }
5961
5962    function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
5963      var i = vnode.data;
5964      if (isDef(i)) {
5965        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
5966        if (isDef(i = i.hook) && isDef(i = i.init)) {
5967          i(vnode, false /* hydrating */);
5968        }
5969        // after calling the init hook, if the vnode is a child component
5970        // it should've created a child instance and mounted it. the child
5971        // component also has set the placeholder vnode's elm.
5972        // in that case we can just return the element and be done.

5973        if (isDef(vnode.componentInstance)) {
5974          initComponent(vnode, insertedVnodeQueue);
5975          insert(parentElm, vnode.elm, refElm);
5976          if (isTrue(isReactivated)) {
5977            reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
5978          }
5979          return true
5980        }
5981      }
5982    }
5983
5984    function initComponent (vnode, insertedVnodeQueue) {
5985      if (isDef(vnode.data.pendingInsert)) {
5986        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
5987        vnode.data.pendingInsert = null;
5988      }
5989      vnode.elm = vnode.componentInstance.$el;
5990      if (isPatchable(vnode)) {
5991        invokeCreateHooks(vnode, insertedVnodeQueue);
5992        setScope(vnode);
5993      } else {
5994        // empty component root.
5995        // skip all element-related modules except for ref (#3455)
5996        registerRef(vnode);
5997        // make sure to invoke the insert hook
5998        insertedVnodeQueue.push(vnode);
5999      }
6000    }
6001
6002    function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
6003      var i;
6004      // hack for #4339: a reactivated component with inner transition
6005      // does not trigger because the inner node's created hooks are not called
6006      // again. It's not ideal to involve module-specific logic in here but
6007      // there doesn't seem to be a better way to do it.
6008      var innerNode = vnode;
6009      while (innerNode.componentInstance) {
6010        innerNode = innerNode.componentInstance._vnode;
6011        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
6012          for (i = 0; i < cbs.activate.length; ++i) {
6013            cbs.activate[i](emptyNode, innerNode);
6014          }
6015          insertedVnodeQueue.push(innerNode);
6016          break
6017        }
6018      }
6019      // unlike a newly created component,
6020      // a reactivated keep-alive component doesn't insert itself
6021      insert(parentElm, vnode.elm, refElm);
6022    }
6023
6024    function insert (parent, elm, ref$$1) {
6025      if (isDef(parent)) {
6026        if (isDef(ref$$1)) {
6027          if (nodeOps.parentNode(ref$$1) === parent) {
6028            nodeOps.insertBefore(parent, elm, ref$$1);
6029          }
6030        } else {
6031          nodeOps.appendChild(parent, elm);
6032        }
6033      }
6034    }
6035
6036    function createChildren (vnode, children, insertedVnodeQueue) {
6037      if (Array.isArray(children)) {
6038        {
6039          checkDuplicateKeys(children);
6040        }
6041        for (var i = 0; i < children.length; ++i) {
6042          createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
6043        }
6044      } else if (isPrimitive(vnode.text)) {
6045        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
6046      }
6047    }
6048
6049    function isPatchable (vnode) {
6050      while (vnode.componentInstance) {
6051        vnode = vnode.componentInstance._vnode;
6052      }
6053      return isDef(vnode.tag)
6054    }
6055
6056    function invokeCreateHooks (vnode, insertedVnodeQueue) {
6057      for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
6058        cbs.create[i$1](emptyNode, vnode);
6059      }
6060      i = vnode.data.hook; // Reuse variable
6061      if (isDef(i)) {
6062        if (isDef(i.create)) { i.create(emptyNode, vnode); }
6063        if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
6064      }
6065    }
6066
6067    // set scope id attribute for scoped CSS.
6068    // this is implemented as a special case to avoid the overhead
6069    // of going through the normal attribute patching process.
6070    function setScope (vnode) {
6071      var i;
6072      if (isDef(i = vnode.fnScopeId)) {
6073        nodeOps.setStyleScope(vnode.elm, i);
6074      } else {
6075        var ancestor = vnode;
6076        while (ancestor) {
6077          if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
6078            nodeOps.setStyleScope(vnode.elm, i);
6079          }
6080          ancestor = ancestor.parent;
6081        }
6082      }
6083      // for slot content they should also get the scopeId from the host instance.
6084      if (isDef(i = activeInstance) &&
6085        i !== vnode.context &&
6086        i !== vnode.fnContext &&
6087        isDef(i = i.$options._scopeId)
6088      ) {
6089        nodeOps.setStyleScope(vnode.elm, i);
6090      }
6091    }
6092
6093    function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
6094      for (; startIdx <= endIdx; ++startIdx) {
6095        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
6096      }
6097    }
6098
6099    function invokeDestroyHook (vnode) {
6100      var i, j;
6101      var data = vnode.data;
6102      if (isDef(data)) {
6103        if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
6104        for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
6105      }
6106      if (isDef(i = vnode.children)) {
6107        for (j = 0; j < vnode.children.length; ++j) {
6108          invokeDestroyHook(vnode.children[j]);
6109        }
6110      }
6111    }
6112
6113    function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
6114      for (; startIdx <= endIdx; ++startIdx) {
6115        var ch = vnodes[startIdx];
6116        if (isDef(ch)) {
6117          if (isDef(ch.tag)) {
6118            removeAndInvokeRemoveHook(ch);
6119            invokeDestroyHook(ch);
6120          } else { // Text node
6121            removeNode(ch.elm);
6122          }
6123        }
6124      }
6125    }
6126
6127    function removeAndInvokeRemoveHook (vnode, rm) {
6128      if (isDef(rm) || isDef(vnode.data)) {
6129        var i;
6130        var listeners = cbs.remove.length + 1;
6131        if (isDef(rm)) {
6132          // we have a recursively passed down rm callback
6133          // increase the listeners count
6134          rm.listeners += listeners;
6135        } else {
6136          // directly removing
6137          rm = createRmCb(vnode.elm, listeners);
6138        }
6139        // recursively invoke hooks on child component root node
6140        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
6141          removeAndInvokeRemoveHook(i, rm);
6142        }
6143        for (i = 0; i < cbs.remove.length; ++i) {

6144          cbs.remove[i](vnode, rm);
6145        }
6146        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
6147          i(vnode, rm);
6148        } else {
6149          rm();
6150        }
6151      } else {
6152        removeNode(vnode.elm);
6153      }
6154    }
6155
6156    function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
6157      var oldStartIdx = 0;
6158      var newStartIdx = 0;
6159      var oldEndIdx = oldCh.length - 1;
6160      var oldStartVnode = oldCh[0];
6161      var oldEndVnode = oldCh[oldEndIdx];
6162      var newEndIdx = newCh.length - 1;
6163      var newStartVnode = newCh[0];
6164      var newEndVnode = newCh[newEndIdx];
6165      var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
6166
6167      // removeOnly is a special flag used only by <transition-group>
6168      // to ensure removed elements stay in correct relative positions
6169      // during leaving transitions
6170      var canMove = !removeOnly;
6171
6172      {
6173        checkDuplicateKeys(newCh);
6174      }
6175
6176      while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
6177        if (isUndef(oldStartVnode)) {
6178          oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
6179        } else if (isUndef(oldEndVnode)) {
6180          oldEndVnode = oldCh[--oldEndIdx];
6181        } else if (sameVnode(oldStartVnode, newStartVnode)) {
6182          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
6183          oldStartVnode = oldCh[++oldStartIdx];
6184          newStartVnode = newCh[++newStartIdx];
6185        } else if (sameVnode(oldEndVnode, newEndVnode)) {
6186          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
6187          oldEndVnode = oldCh[--oldEndIdx];
6188          newEndVnode = newCh[--newEndIdx];
6189        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
6190          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
6191          canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
6192          oldStartVnode = oldCh[++oldStartIdx];
6193          newEndVnode = newCh[--newEndIdx];
6194        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
6195          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
6196          canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
6197          oldEndVnode = oldCh[--oldEndIdx];
6198          newStartVnode = newCh[++newStartIdx];
6199        } else {
6200          if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
6201          idxInOld = isDef(newStartVnode.key)
6202            ? oldKeyToIdx[newStartVnode.key]
6203            : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
6204          if (isUndef(idxInOld)) { // New element
6205            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
6206          } else {
6207            vnodeToMove = oldCh[idxInOld];
6208            if (sameVnode(vnodeToMove, newStartVnode)) {
6209              patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
6210              oldCh[idxInOld] = undefined;
6211              canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
6212            } else {
6213              // same key but different element. treat as new element
6214              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
6215            }
6216          }
6217          newStartVnode = newCh[++newStartIdx];
6218        }
6219      }
6220      if (oldStartIdx > oldEndIdx) {
6221        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
6222        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
6223      } else if (newStartIdx > newEndIdx) {
6224        removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
6225      }
6226    }
6227
6228    function checkDuplicateKeys (children) {
6229      var seenKeys = {};
6230      for (var i = 0; i < children.length; i++) {
6231        var vnode = children[i];
6232        var key = vnode.key;
6233        if (isDef(key)) {
6234          if (seenKeys[key]) {
6235            warn(
6236              ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
6237              vnode.context
6238            );
6239          } else {
6240            seenKeys[key] = true;
6241          }
6242        }
6243      }
6244    }
6245
6246    function findIdxInOld (node, oldCh, start, end) {
6247      for (var i = start; i < end; i++) {
6248        var c = oldCh[i];
6249        if (isDef(c) && sameVnode(node, c)) { return i }
6250      }
6251    }
6252
6253    function patchVnode (
6254      oldVnode,
6255      vnode,
6256      insertedVnodeQueue,
6257      ownerArray,
6258      index,
6259      removeOnly
6260    ) {
6261      if (oldVnode === vnode) {
6262        return
6263      }
6264

6265      if (isDef(vnode.elm) && isDef(ownerArray)) {
6266        // clone reused vnode
6267        vnode = ownerArray[index] = cloneVNode(vnode);
6268      }
6269
6270      var elm = vnode.elm = oldVnode.elm;
6271
6272      if (isTrue(oldVnode.isAsyncPlaceholder)) {
6273        if (isDef(vnode.asyncFactory.resolved)) {
6274          hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
6275        } else {
6276          vnode.isAsyncPlaceholder = true;
6277        }
6278        return
6279      }
6280
6281      // reuse element for static trees.
6282      // note we only do this if the vnode is cloned -
6283      // if the new node is not cloned it means the render functions have been
6284      // reset by the hot-reload-api and we need to do a proper re-render.
6285      if (isTrue(vnode.isStatic) &&
6286        isTrue(oldVnode.isStatic) &&
6287        vnode.key === oldVnode.key &&
6288        (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
6289      ) {
6290        vnode.componentInstance = oldVnode.componentInstance;
6291        return
6292      }
6293
6294      var i;
6295      var data = vnode.data;
6296      if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
6297        i(oldVnode, vnode);
6298      }
6299
6300      var oldCh = oldVnode.children;
6301      var ch = vnode.children;
6302      if (isDef(data) && isPatchable(vnode)) {
6303        for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
6304        if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
6305      }
6306      if (isUndef(vnode.text)) {
6307        if (isDef(oldCh) && isDef(ch)) {
6308          if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
6309        } else if (isDef(ch)) {
6310          {
6311            checkDuplicateKeys(ch);
6312          }
6313          if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
6314          addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
6315        } else if (isDef(oldCh)) {
6316          removeVnodes(elm, oldCh, 0, oldCh.length - 1);
6317        } else if (isDef(oldVnode.text)) {
6318          nodeOps.setTextContent(elm, '');
6319        }
6320      } else if (oldVnode.text !== vnode.text) {
6321        nodeOps.setTextContent(elm, vnode.text);
6322      }
6323      if (isDef(data)) {
6324        if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
6325      }
6326    }
6327
6328    function invokeInsertHook (vnode, queue, initial) {
6329      // delay insert hooks for component root nodes, invoke them after the
6330      // element is really inserted
6331      if (isTrue(initial) && isDef(vnode.parent)) {
6332        vnode.parent.data.pendingInsert = queue;
6333      } else {
6334        for (var i = 0; i < queue.length; ++i) {
6335          queue[i].data.hook.insert(queue[i]);
6336        }
6337      }
6338    }
6339
6340    var hydrationBailed = false;
6341    // list of modules that can skip create hook during hydration because they
6342    // are already rendered on the client or has no need for initialization
6343    // Note: style is excluded because it relies on initial clone for future
6344    // deep updates (#7063).
6345    var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
6346
6347    // Note: this is a browser-only function so we can assume elms are DOM nodes.
6348    function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
6349      var i;
6350      var tag = vnode.tag;
6351      var data = vnode.data;
6352      var children = vnode.children;
6353      inVPre = inVPre || (data && data.pre);
6354      vnode.elm = elm;
6355
6356      if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
6357        vnode.isAsyncPlaceholder = true;
6358        return true
6359      }
6360      // assert node match
6361      {
6362        if (!assertNodeMatch(elm, vnode, inVPre)) {
6363          return false
6364        }
6365      }
6366      if (isDef(data)) {
6367        if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
6368        if (isDef(i = vnode.componentInstance)) {
6369          // child component. it should have hydrated its own tree.
6370          initComponent(vnode, insertedVnodeQueue);
6371          return true
6372        }
6373      }
6374      if (isDef(tag)) {
6375        if (isDef(children)) {
6376          // empty element, allow client to pick up and populate children
6377          if (!elm.hasChildNodes()) {
6378            createChildren(vnode, children, insertedVnodeQueue);
6379          } else {
6380            // v-html and domProps: innerHTML
6381            if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
6382              if (i !== elm.innerHTML) {
6383                /* istanbul ignore if */
6384                if (typeof console !== 'undefined' &&
6385                  !hydrationBailed
6386                ) {
6387                  hydrationBailed = true;
6388                  console.warn('Parent: ', elm);
6389                  console.warn('server innerHTML: ', i);
6390                  console.warn('client innerHTML: ', elm.innerHTML);
6391                }
6392                return false
6393              }
6394            } else {
6395              // iterate and compare children lists
6396              var childrenMatch = true;
6397              var childNode = elm.firstChild;
6398              for (var i$1 = 0; i$1 < children.length; i$1++) {
6399                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
6400                  childrenMatch = false;

6401                  break
6402                }
6403                childNode = childNode.nextSibling;
6404              }
6405              // if childNode is not null, it means the actual childNodes list is
6406              // longer than the virtual children list.
6407              if (!childrenMatch || childNode) {
6408                /* istanbul ignore if */
6409                if (typeof console !== 'undefined' &&
6410                  !hydrationBailed
6411                ) {
6412                  hydrationBailed = true;
6413                  console.warn('Parent: ', elm);
6414                  console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
6415                }
6416                return false
6417              }
6418            }
6419          }
6420        }
6421        if (isDef(data)) {
6422          var fullInvoke = false;
6423          for (var key in data) {
6424            if (!isRenderedModule(key)) {
6425              fullInvoke = true;
6426              invokeCreateHooks(vnode, insertedVnodeQueue);
6427              break
6428            }
6429          }
6430          if (!fullInvoke && data['class']) {
6431            // ensure collecting deps for deep class bindings for future updates
6432            traverse(data['class']);
6433          }
6434        }
6435      } else if (elm.data !== vnode.text) {
6436        elm.data = vnode.text;
6437      }
6438      return true
6439    }
6440
6441    function assertNodeMatch (node, vnode, inVPre) {

6442      if (isDef(vnode.tag)) {
6443        return vnode.tag.indexOf('vue-component') === 0 || (
6444          !isUnknownElement$$1(vnode, inVPre) &&
6445          vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
6446        )
6447      } else {
6448        return node.nodeType === (vnode.isComment ? 8 : 3)
6449      }
6450    }
6451
6452    return function patch (oldVnode, vnode, hydrating, removeOnly) {
6453      if (isUndef(vnode)) {
6454        if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
6455        return
6456      }
6457
6458      var isInitialPatch = false;
6459      var insertedVnodeQueue = [];
6460
6461      if (isUndef(oldVnode)) {
6462        // empty mount (likely as component), create new root element
6463        isInitialPatch = true;
6464        createElm(vnode, insertedVnodeQueue);
6465      } else {
6466        var isRealElement = isDef(oldVnode.nodeType);
6467        if (!isRealElement && sameVnode(oldVnode, vnode)) {
6468          // patch existing root node
6469          patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
6470        } else {
6471          if (isRealElement) {
6472            // mounting to a real element
6473            // check if this is server-rendered content and if we can perform
6474            // a successful hydration.
6475            if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
6476              oldVnode.removeAttribute(SSR_ATTR);
6477              hydrating = true;
6478            }
6479            if (isTrue(hydrating)) {
6480              if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
6481                invokeInsertHook(vnode, insertedVnodeQueue, true);
6482                return oldVnode
6483              } else {
6484                warn(
6485                  'The client-side rendered virtual DOM tree is not matching ' +
6486                  'server-rendered content. This is likely caused by incorrect ' +
6487                  'HTML markup, for example nesting block-level elements inside ' +
6488                  '<p>, or missing <tbody>. Bailing hydration and performing ' +
6489                  'full client-side render.'
6490                );
6491              }
6492            }
6493            // either not server-rendered, or hydration failed.
6494            // create an empty node and replace it
6495            oldVnode = emptyNodeAt(oldVnode);
6496          }
6497
6498          // replacing existing element
6499          var oldElm = oldVnode.elm;
6500          var parentElm = nodeOps.parentNode(oldElm);
6501
6502          // create new node
6503          createElm(
6504            vnode,
6505            insertedVnodeQueue,
6506            // extremely rare edge case: do not insert if old element is in a
6507            // leaving transition. Only happens when combining transition +
6508            // keep-alive + HOCs. (#4590)
6509            oldElm._leaveCb ? null : parentElm,
6510            nodeOps.nextSibling(oldElm)
6511          );
6512
6513          // update parent placeholder node element, recursively

6514          if (isDef(vnode.parent)) {
6515            var ancestor = vnode.parent;
6516            var patchable = isPatchable(vnode);
6517            while (ancestor) {
6518              for (var i = 0; i < cbs.destroy.length; ++i) {
6519                cbs.destroy[i](ancestor);
6520              }
6521              ancestor.elm = vnode.elm;
6522              if (patchable) {
6523                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
6524                  cbs.create[i$1](emptyNode, ancestor);
6525                }
6526                // #6513
6527                // invoke insert hooks that may have been merged by create hooks.
6528                // e.g. for directives that uses the "inserted" hook.
6529                var insert = ancestor.data.hook.insert;
6530                if (insert.merged) {
6531                  // start at index 1 to avoid re-invoking component mounted hook
6532                  for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
6533                    insert.fns[i$2]();
6534                  }
6535                }
6536              } else {
6537                registerRef(ancestor);
6538              }
6539              ancestor = ancestor.parent;
6540            }
6541          }
6542
6543          // destroy old node
6544          if (isDef(parentElm)) {
6545            removeVnodes(parentElm, [oldVnode], 0, 0);
6546          } else if (isDef(oldVnode.tag)) {
6547            invokeDestroyHook(oldVnode);
6548          }
6549        }
6550      }
6551
6552      invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
6553      return vnode.elm
6554    }
6555  }
6556
6557  /*  */
6558
6559  var directives = {
6560    create: updateDirectives,
6561    update: updateDirectives,
6562    destroy: function unbindDirectives (vnode) {
6563      updateDirectives(vnode, emptyNode);
6564    }
6565  };
6566
6567  function updateDirectives (oldVnode, vnode) {
6568    if (oldVnode.data.directives || vnode.data.directives) {
6569      _update(oldVnode, vnode);
6570    }
6571  }
6572
6573  function _update (oldVnode, vnode) {
6574    var isCreate = oldVnode === emptyNode;
6575    var isDestroy = vnode === emptyNode;
6576    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
6577    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
6578
6579    var dirsWithInsert = [];
6580    var dirsWithPostpatch = [];
6581
6582    var key, oldDir, dir;
6583    for (key in newDirs) {
6584      oldDir = oldDirs[key];
6585      dir = newDirs[key];
6586      if (!oldDir) {
6587        // new directive, bind
6588        callHook$1(dir, 'bind', vnode, oldVnode);
6589        if (dir.def && dir.def.inserted) {
6590          dirsWithInsert.push(dir);
6591        }
6592      } else {
6593        // existing directive, update
6594        dir.oldValue = oldDir.value;
6595        dir.oldArg = oldDir.arg;
6596        callHook$1(dir, 'update', vnode, oldVnode);
6597        if (dir.def && dir.def.componentUpdated) {
6598          dirsWithPostpatch.push(dir);
6599        }
6600      }
6601    }
6602
6603    if (dirsWithInsert.length) {
6604      var callInsert = function () {
6605        for (var i = 0; i < dirsWithInsert.length; i++) {
6606          callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
6607        }
6608      };
6609      if (isCreate) {
6610        mergeVNodeHook(vnode, 'insert', callInsert);
6611      } else {
6612        callInsert();
6613      }
6614    }
6615
6616    if (dirsWithPostpatch.length) {
6617      mergeVNodeHook(vnode, 'postpatch', function () {
6618        for (var i = 0; i < dirsWithPostpatch.length; i++) {
6619          callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
6620        }
6621      });
6622    }
6623
6624    if (!isCreate) {
6625      for (key in oldDirs) {
6626        if (!newDirs[key]) {
6627          // no longer present, unbind
6628          callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
6629        }
6630      }
6631    }
6632  }
6633
6634  var emptyModifiers = Object.create(null);
6635
6636  function normalizeDirectives$1 (
6637    dirs,
6638    vm
6639  ) {
6640    var res = Object.create(null);
6641    if (!dirs) {
6642      // $flow-disable-line
6643      return res
6644    }
6645    var i, dir;
6646    for (i = 0; i < dirs.length; i++) {
6647      dir = dirs[i];
6648      if (!dir.modifiers) {
6649        // $flow-disable-line
6650        dir.modifiers = emptyModifiers;
6651      }
6652      res[getRawDirName(dir)] = dir;
6653      dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
6654    }
6655    // $flow-disable-line
6656    return res
6657  }
6658
6659  function getRawDirName (dir) {
6660    return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
6661  }
6662
6663  function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
6664    var fn = dir.def && dir.def[hook];
6665    if (fn) {

6666      try {
6667        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
6668      } catch (e) {
6669        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
6670      }
6671    }
6672  }
6673
6674  var baseModules = [
6675    ref,
6676    directives
6677  ];
6678
6679  /*  */
6680
6681  function updateAttrs (oldVnode, vnode) {
6682    var opts = vnode.componentOptions;
6683    if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
6684      return
6685    }
6686    if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
6687      return
6688    }
6689    var key, cur, old;
6690    var elm = vnode.elm;
6691    var oldAttrs = oldVnode.data.attrs || {};
6692    var attrs = vnode.data.attrs || {};
6693    // clone observed objects, as the user probably wants to mutate it
6694    if (isDef(attrs.__ob__)) {
6695      attrs = vnode.data.attrs = extend({}, attrs);
6696    }
6697
6698    for (key in attrs) {
6699      cur = attrs[key];
6700      old = oldAttrs[key];
6701      if (old !== cur) {
6702        setAttr(elm, key, cur);
6703      }
6704    }
6705    // #4391: in IE9, setting type can reset value for input[type=radio]
6706    // #6666: IE/Edge forces progress value down to 1 before setting a max
6707    /* istanbul ignore if */
6708    if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
6709      setAttr(elm, 'value', attrs.value);
6710    }
6711    for (key in oldAttrs) {
6712      if (isUndef(attrs[key])) {
6713        if (isXlink(key)) {
6714          elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
6715        } else if (!isEnumeratedAttr(key)) {
6716          elm.removeAttribute(key);
6717        }
6718      }
6719    }
6720  }
6721
6722  function setAttr (el, key, value) {
6723    if (el.tagName.indexOf('-') > -1) {
6724      baseSetAttr(el, key, value);
6725    } else if (isBooleanAttr(key)) {
6726      // set attribute for blank value
6727      // e.g. <option disabled>Select one</option>
6728      if (isFalsyAttrValue(value)) {
6729        el.removeAttribute(key);
6730      } else {
6731        // technically allowfullscreen is a boolean attribute for <iframe>,
6732        // but Flash expects a value of "true" when used on <embed> tag
6733        value = key === 'allowfullscreen' && el.tagName === 'EMBED'
6734          ? 'true'
6735          : key;
6736        el.setAttribute(key, value);
6737      }
6738    } else if (isEnumeratedAttr(key)) {
6739      el.setAttribute(key, convertEnumeratedValue(key, value));
6740    } else if (isXlink(key)) {
6741      if (isFalsyAttrValue(value)) {
6742        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
6743      } else {
6744        el.setAttributeNS(xlinkNS, key, value);
6745      }
6746    } else {
6747      baseSetAttr(el, key, value);
6748    }
6749  }
6750
6751  function baseSetAttr (el, key, value) {
6752    if (isFalsyAttrValue(value)) {
6753      el.removeAttribute(key);
6754    } else {
6755      // #7138: IE10 & 11 fires input event when setting placeholder on
6756      // <textarea>... block the first input event and remove the blocker
6757      // immediately.
6758      /* istanbul ignore if */
6759      if (
6760        isIE && !isIE9 &&
6761        el.tagName === 'TEXTAREA' &&
6762        key === 'placeholder' && value !== '' && !el.__ieph
6763      ) {
6764        var blocker = function (e) {
6765          e.stopImmediatePropagation();
6766          el.removeEventListener('input', blocker);
6767        };
6768        el.addEventListener('input', blocker);
6769        // $flow-disable-line
6770        el.__ieph = true; /* IE placeholder patched */
6771      }
6772      el.setAttribute(key, value);
6773    }
6774  }
6775
6776  var attrs = {
6777    create: updateAttrs,
6778    update: updateAttrs
6779  };
6780
6781  /*  */
6782
6783  function updateClass (oldVnode, vnode) {
6784    var el = vnode.elm;
6785    var data = vnode.data;
6786    var oldData = oldVnode.data;
6787    if (
6788      isUndef(data.staticClass) &&
6789      isUndef(data.class) && (
6790        isUndef(oldData) || (
6791          isUndef(oldData.staticClass) &&
6792          isUndef(oldData.class)
6793        )
6794      )
6795    ) {
6796      return
6797    }
6798
6799    var cls = genClassForVnode(vnode);
6800
6801    // handle transition classes
6802    var transitionClass = el._transitionClasses;
6803    if (isDef(transitionClass)) {
6804      cls = concat(cls, stringifyClass(transitionClass));
6805    }
6806
6807    // set the class
6808    if (cls !== el._prevClass) {
6809      el.setAttribute('class', cls);
6810      el._prevClass = cls;
6811    }
6812  }
6813
6814  var klass = {
6815    create: updateClass,
6816    update: updateClass
6817  };
6818
6819  /*  */
6820

6821  var validDivisionCharRE = /[\w).+\-_$\]]/;
6822
6823  function parseFilters (exp) {
6824    var inSingle = false;
6825    var inDouble = false;
6826    var inTemplateString = false;
6827    var inRegex = false;
6828    var curly = 0;
6829    var square = 0;
6830    var paren = 0;
6831    var lastFilterIndex = 0;
6832    var c, prev, i, expression, filters;
6833
6834    for (i = 0; i < exp.length; i++) {
6835      prev = c;
6836      c = exp.charCodeAt(i);
6837      if (inSingle) {
6838        if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
6839      } else if (inDouble) {
6840        if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
6841      } else if (inTemplateString) {
6842        if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
6843      } else if (inRegex) {
6844        if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
6845      } else if (
6846        c === 0x7C && // pipe
6847        exp.charCodeAt(i + 1) !== 0x7C &&
6848        exp.charCodeAt(i - 1) !== 0x7C &&
6849        !curly && !square && !paren
6850      ) {
6851        if (expression === undefined) {
6852          // first filter, end of expression
6853          lastFilterIndex = i + 1;
6854          expression = exp.slice(0, i).trim();
6855        } else {
6856          pushFilter();
6857        }
6858      } else {
6859        switch (c) {
6860          case 0x22: inDouble = true; break         // "
6861          case 0x27: inSingle = true; break         // '
6862          case 0x60: inTemplateString = true; break // `
6863          case 0x28: paren++; break                 // (
6864          case 0x29: paren--; break                 // )
6865          case 0x5B: square++; break                // [
6866          case 0x5D: square--; break                // ]
6867          case 0x7B: curly++; break                 // {
6868          case 0x7D: curly--; break                 // }
6869        }
6870        if (c === 0x2f) { // /
6871          var j = i - 1;
6872          var p = (void 0);
6873          // find first non-whitespace prev char
6874          for (; j >= 0; j--) {
6875            p = exp.charAt(j);
6876            if (p !== ' ') { break }
6877          }
6878          if (!p || !validDivisionCharRE.test(p)) {
6879            inRegex = true;
6880          }
6881        }
6882      }
6883    }
6884
6885    if (expression === undefined) {
6886      expression = exp.slice(0, i).trim();
6887    } else if (lastFilterIndex !== 0) {
6888      pushFilter();
6889    }
6890
6891    function pushFilter () {
6892      (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
6893      lastFilterIndex = i + 1;
6894    }
6895
6896    if (filters) {
6897      for (i = 0; i < filters.length; i++) {
6898        expression = wrapFilter(expression, filters[i]);
6899      }
6900    }
6901
6902    return expression
6903  }
6904
6905  function wrapFilter (exp, filter) {
6906    var i = filter.indexOf('(');
6907    if (i < 0) {
6908      // _f: resolveFilter
6909      return ("_f(\"" + filter + "\")(" + exp + ")")
6910    } else {
6911      var name = filter.slice(0, i);
6912      var args = filter.slice(i + 1);
6913      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
6914    }
6915  }
6916
6917  /*  */
6918
6919
6920
6921  /* eslint-disable no-unused-vars */
6922  function baseWarn (msg, range) {
6923    console.error(("[Vue compiler]: " + msg));
6924  }
6925  /* eslint-enable no-unused-vars */
6926
6927  function pluckModuleFunction (
6928    modules,
6929    key
6930  ) {
6931    return modules
6932      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
6933      : []
6934  }
6935
6936  function addProp (el, name, value, range, dynamic) {
6937    (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
6938    el.plain = false;
6939  }
6940
6941  function addAttr (el, name, value, range, dynamic) {
6942    var attrs = dynamic
6943      ? (el.dynamicAttrs || (el.dynamicAttrs = []))
6944      : (el.attrs || (el.attrs = []));
6945    attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
6946    el.plain = false;
6947  }
6948
6949  // add a raw attr (use this in preTransforms)
6950  function addRawAttr (el, name, value, range) {
6951    el.attrsMap[name] = value;
6952    el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
6953  }
6954
6955  function addDirective (
6956    el,
6957    name,
6958    rawName,
6959    value,
6960    arg,
6961    isDynamicArg,
6962    modifiers,
6963    range
6964  ) {
6965    (el.directives || (el.directives = [])).push(rangeSetItem({
6966      name: name,
6967      rawName: rawName,
6968      value: value,
6969      arg: arg,
6970      isDynamicArg: isDynamicArg,
6971      modifiers: modifiers
6972    }, range));
6973    el.plain = false;

6974  }
6975
6976  function prependModifierMarker (symbol, name, dynamic) {
6977    return dynamic
6978      ? ("_p(" + name + ",\"" + symbol + "\")")
6979      : symbol + name // mark the event as captured
6980  }
6981
6982  function addHandler (
6983    el,
6984    name,
6985    value,
6986    modifiers,
6987    important,
6988    warn,
6989    range,
6990    dynamic
6991  ) {
6992    modifiers = modifiers || emptyObject;
6993    // warn prevent and passive modifier
6994    /* istanbul ignore if */
6995    if (
6996      warn &&
6997      modifiers.prevent && modifiers.passive
6998    ) {
6999      warn(
7000        'passive and prevent can\'t be used together. ' +
7001        'Passive handler can\'t prevent default event.',
7002        range
7003      );
7004    }
7005
7006    // normalize click.right and click.middle since they don't actually fire
7007    // this is technically browser-specific, but at least for now browsers are
7008    // the only target envs that have right/middle clicks.
7009    if (modifiers.right) {
7010      if (dynamic) {
7011        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
7012      } else if (name === 'click') {
7013        name = 'contextmenu';
7014        delete modifiers.right;
7015      }
7016    } else if (modifiers.middle) {
7017      if (dynamic) {
7018        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
7019      } else if (name === 'click') {
7020        name = 'mouseup';
7021      }
7022    }
7023
7024    // check capture modifier
7025    if (modifiers.capture) {
7026      delete modifiers.capture;
7027      name = prependModifierMarker('!', name, dynamic);
7028    }
7029    if (modifiers.once) {
7030      delete modifiers.once;
7031      name = prependModifierMarker('~', name, dynamic);
7032    }
7033    /* istanbul ignore if */
7034    if (modifiers.passive) {
7035      delete modifiers.passive;
7036      name = prependModifierMarker('&', name, dynamic);
7037    }
7038
7039    var events;
7040    if (modifiers.native) {
7041      delete modifiers.native;
7042      events = el.nativeEvents || (el.nativeEvents = {});
7043    } else {
7044      events = el.events || (el.events = {});
7045    }
7046
7047    var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
7048    if (modifiers !== emptyObject) {
7049      newHandler.modifiers = modifiers;
7050    }
7051
7052    var handlers = events[name];
7053    /* istanbul ignore if */
7054    if (Array.isArray(handlers)) {
7055      important ? handlers.unshift(newHandler) : handlers.push(newHandler);
7056    } else if (handlers) {
7057      events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
7058    } else {
7059      events[name] = newHandler;
7060    }
7061
7062    el.plain = false;
7063  }
7064
7065  function getRawBindingAttr (
7066    el,
7067    name
7068  ) {
7069    return el.rawAttrsMap[':' + name] ||
7070      el.rawAttrsMap['v-bind:' + name] ||
7071      el.rawAttrsMap[name]
7072  }
7073
7074  function getBindingAttr (
7075    el,
7076    name,
7077    getStatic
7078  ) {
7079    var dynamicValue =
7080      getAndRemoveAttr(el, ':' + name) ||
7081      getAndRemoveAttr(el, 'v-bind:' + name);
7082    if (dynamicValue != null) {
7083      return parseFilters(dynamicValue)
7084    } else if (getStatic !== false) {
7085      var staticValue = getAndRemoveAttr(el, name);
7086      if (staticValue != null) {
7087        return JSON.stringify(staticValue)
7088      }
7089    }
7090  }
7091
7092  // note: this only removes the attr from the Array (attrsList) so that it
7093  // doesn't get processed by processAttrs.
7094  // By default it does NOT remove it from the map (attrsMap) because the map is
7095  // needed during codegen.
7096  function getAndRemoveAttr (
7097    el,
7098    name,
7099    removeFromMap
7100  ) {
7101    var val;
7102    if ((val = el.attrsMap[name]) != null) {
7103      var list = el.attrsList;
7104      for (var i = 0, l = list.length; i < l; i++) {
7105        if (list[i].name === name) {
7106          list.splice(i, 1);
7107          break
7108        }
7109      }
7110    }
7111    if (removeFromMap) {
7112      delete el.attrsMap[name];
7113    }
7114    return val
7115  }
7116
7117  function getAndRemoveAttrByRegex (
7118    el,
7119    name
7120  ) {
7121    var list = el.attrsList;
7122    for (var i = 0, l = list.length; i < l; i++) {
7123      var attr = list[i];
7124      if (name.test(attr.name)) {
7125        list.splice(i, 1);
7126        return attr
7127      }
7128    }
7129  }
7130
7131  function rangeSetItem (
7132    item,
7133    range
7134  ) {
7135    if (range) {
7136      if (range.start != null) {
7137        item.start = range.start;
7138      }
7139      if (range.end != null) {
7140        item.end = range.end;
7141      }
7142    }
7143    return item
7144  }
7145
7146  /*  */
7147
7148  /**
7149   * Cross-platform code generation for component v-model
7150   */
7151  function genComponentModel (
7152    el,
7153    value,
7154    modifiers
7155  ) {
7156    var ref = modifiers || {};
7157    var number = ref.number;
7158    var trim = ref.trim;
7159
7160    var baseValueExpression = '$$v';
7161    var valueExpression = baseValueExpression;
7162    if (trim) {
7163      valueExpression =
7164        "(typeof " + baseValueExpression + " === 'string'" +
7165        "? " + baseValueExpression + ".trim()" +
7166        ": " + baseValueExpression + ")";
7167    }
7168    if (number) {
7169      valueExpression = "_n(" + valueExpression + ")";
7170    }

7171    var assignment = genAssignmentCode(value, valueExpression);
7172
7173    el.model = {
7174      value: ("(" + value + ")"),
7175      expression: JSON.stringify(value),
7176      callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
7177    };
7178  }
7179
7180  /**
7181   * Cross-platform codegen helper for generating v-model value assignment code.
7182   */
7183  function genAssignmentCode (
7184    value,
7185    assignment
7186  ) {
7187    var res = parseModel(value);
7188    if (res.key === null) {
7189      return (value + "=" + assignment)
7190    } else {
7191      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
7192    }
7193  }
7194
7195  /**
7196   * Parse a v-model expression into a base path and a final key segment.
7197   * Handles both dot-path and possible square brackets.
7198   *
7199   * Possible cases:
7200   *
7201   * - test
7202   * - test[key]
7203   * - test[test1[key]]
7204   * - test["a"][key]
7205   * - xxx.test[a[a].test1[key]]
7206   * - test.xxx.a["asa"][test1[key]]
7207   *
7208   */
7209
7210  var len, str, chr, index$1, expressionPos, expressionEndPos;
7211
7212
7213
7214  function parseModel (val) {
7215    // Fix https://github.com/vuejs/vue/pull/7730
7216    // allow v-model="obj.val " (trailing whitespace)
7217    val = val.trim();
7218    len = val.length;
7219
7220    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
7221      index$1 = val.lastIndexOf('.');
7222      if (index$1 > -1) {
7223        return {
7224          exp: val.slice(0, index$1),
7225          key: '"' + val.slice(index$1 + 1) + '"'
7226        }
7227      } else {
7228        return {
7229          exp: val,
7230          key: null
7231        }
7232      }
7233    }
7234
7235    str = val;
7236    index$1 = expressionPos = expressionEndPos = 0;
7237
7238    while (!eof()) {
7239      chr = next();
7240      /* istanbul ignore if */
7241      if (isStringStart(chr)) {
7242        parseString(chr);
7243      } else if (chr === 0x5B) {
7244        parseBracket(chr);
7245      }
7246    }
7247
7248    return {
7249      exp: val.slice(0, expressionPos),
7250      key: val.slice(expressionPos + 1, expressionEndPos)
7251    }
7252  }
7253
7254  function next () {
7255    return str.charCodeAt(++index$1)
7256  }
7257
7258  function eof () {
7259    return index$1 >= len
7260  }
7261
7262  function isStringStart (chr) {
7263    return chr === 0x22 || chr === 0x27
7264  }
7265
7266  function parseBracket (chr) {
7267    var inBracket = 1;
7268    expressionPos = index$1;
7269    while (!eof()) {
7270      chr = next();
7271      if (isStringStart(chr)) {
7272        parseString(chr);
7273        continue
7274      }
7275      if (chr === 0x5B) { inBracket++; }
7276      if (chr === 0x5D) { inBracket--; }
7277      if (inBracket === 0) {
7278        expressionEndPos = index$1;
7279        break
7280      }
7281    }
7282  }
7283
7284  function parseString (chr) {
7285    var stringQuote = chr;
7286    while (!eof()) {
7287      chr = next();
7288      if (chr === stringQuote) {
7289        break
7290      }
7291    }
7292  }
7293
7294  /*  */
7295
7296  var warn$1;
7297
7298  // in some cases, the event used has to be determined at runtime
7299  // so we used some reserved tokens during compile.
7300  var RANGE_TOKEN = '__r';
7301  var CHECKBOX_RADIO_TOKEN = '__c';
7302
7303  function model (
7304    el,
7305    dir,
7306    _warn
7307  ) {
7308    warn$1 = _warn;
7309    var value = dir.value;
7310    var modifiers = dir.modifiers;
7311    var tag = el.tag;
7312    var type = el.attrsMap.type;
7313
7314    {
7315      // inputs with type="file" are read only and setting the input's
7316      // value will throw an error.
7317      if (tag === 'input' && type === 'file') {
7318        warn$1(
7319          "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
7320          "File inputs are read only. Use a v-on:change listener instead.",
7321          el.rawAttrsMap['v-model']
7322        );
7323      }
7324    }
7325
7326    if (el.component) {
7327      genComponentModel(el, value, modifiers);
7328      // component v-model doesn't need extra runtime
7329      return false
7330    } else if (tag === 'select') {
7331      genSelect(el, value, modifiers);
7332    } else if (tag === 'input' && type === 'checkbox') {
7333      genCheckboxModel(el, value, modifiers);
7334    } else if (tag === 'input' && type === 'radio') {
7335      genRadioModel(el, value, modifiers);
7336    } else if (tag === 'input' || tag === 'textarea') {
7337      genDefaultModel(el, value, modifiers);
7338    } else if (!config.isReservedTag(tag)) {
7339      genComponentModel(el, value, modifiers);
7340      // component v-model doesn't need extra runtime
7341      return false
7342    } else {
7343      warn$1(
7344        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
7345        "v-model is not supported on this element type. " +
7346        'If you are working with contenteditable, it\'s recommended to ' +
7347        'wrap a library dedicated for that purpose inside a custom component.',
7348        el.rawAttrsMap['v-model']
7349      );
7350    }
7351
7352    // ensure runtime directive metadata
7353    return true
7354  }
7355

7356  function genCheckboxModel (
7357    el,
7358    value,
7359    modifiers
7360  ) {
7361    var number = modifiers && modifiers.number;
7362    var valueBinding = getBindingAttr(el, 'value') || 'null';
7363    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
7364    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
7365    addProp(el, 'checked',
7366      "Array.isArray(" + value + ")" +
7367      "?_i(" + value + "," + valueBinding + ")>-1" + (
7368        trueValueBinding === 'true'
7369          ? (":(" + value + ")")
7370          : (":_q(" + value + "," + trueValueBinding + ")")
7371      )
7372    );
7373    addHandler(el, 'change',
7374      "var $$a=" + value + "," +
7375          '$$el=$event.target,' +
7376          "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
7377      'if(Array.isArray($$a)){' +
7378        "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
7379            '$$i=_i($$a,$$v);' +
7380        "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
7381        "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
7382      "}else{" + (genAssignmentCode(value, '$$c')) + "}",
7383      null, true
7384    );
7385  }
7386
7387  function genRadioModel (
7388    el,
7389    value,
7390    modifiers
7391  ) {
7392    var number = modifiers && modifiers.number;
7393    var valueBinding = getBindingAttr(el, 'value') || 'null';
7394    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
7395    addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
7396    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
7397  }
7398
7399  function genSelect (
7400    el,
7401    value,
7402    modifiers
7403  ) {
7404    var number = modifiers && modifiers.number;
7405    var selectedVal = "Array.prototype.filter" +
7406      ".call($event.target.options,function(o){return o.selected})" +
7407      ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
7408      "return " + (number ? '_n(val)' : 'val') + "})";
7409
7410    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
7411    var code = "var $$selectedVal = " + selectedVal + ";";
7412    code = code + " " + (genAssignmentCode(value, assignment));
7413    addHandler(el, 'change', code, null, true);
7414  }
7415
7416  function genDefaultModel (
7417    el,
7418    value,
7419    modifiers
7420  ) {
7421    var type = el.attrsMap.type;
7422
7423    // warn if v-bind:value conflicts with v-model
7424    // except for inputs with v-bind:type
7425    {
7426      var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
7427      var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
7428      if (value$1 && !typeBinding) {
7429        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
7430        warn$1(
7431          binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
7432          'because the latter already expands to a value binding internally',
7433          el.rawAttrsMap[binding]
7434        );
7435      }
7436    }
7437
7438    var ref = modifiers || {};
7439    var lazy = ref.lazy;
7440    var number = ref.number;
7441    var trim = ref.trim;
7442    var needCompositionGuard = !lazy && type !== 'range';
7443    var event = lazy
7444      ? 'change'
7445      : type === 'range'
7446        ? RANGE_TOKEN
7447        : 'input';
7448
7449    var valueExpression = '$event.target.value';
7450    if (trim) {
7451      valueExpression = "$event.target.value.trim()";
7452    }
7453    if (number) {
7454      valueExpression = "_n(" + valueExpression + ")";
7455    }
7456
7457    var code = genAssignmentCode(value, valueExpression);
7458    if (needCompositionGuard) {
7459      code = "if($event.target.composing)return;" + code;
7460    }
7461
7462    addProp(el, 'value', ("(" + value + ")"));
7463    addHandler(el, event, code, null, true);
7464    if (trim || number) {
7465      addHandler(el, 'blur', '$forceUpdate()');
7466    }
7467  }
7468
7469  /*  */
7470
7471  // normalize v-model event tokens that can only be determined at runtime.
7472  // it's important to place the event as the first in the array because
7473  // the whole point is ensuring the v-model callback gets called before
7474  // user-attached handlers.
7475  function normalizeEvents (on) {
7476    /* istanbul ignore if */
7477    if (isDef(on[RANGE_TOKEN])) {
7478      // IE input[type=range] only supports `change` event
7479      var event = isIE ? 'change' : 'input';
7480      on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
7481      delete on[RANGE_TOKEN];
7482    }
7483    // This was originally intended to fix #4521 but no longer necessary
7484    // after 2.5. Keeping it for backwards compat with generated code from < 2.4
7485    /* istanbul ignore if */
7486    if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
7487      on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
7488      delete on[CHECKBOX_RADIO_TOKEN];
7489    }
7490  }
7491
7492  var target$1;
7493
7494  function createOnceHandler$1 (event, handler, capture) {
7495    var _target = target$1; // save current target element in closure
7496    return function onceHandler () {
7497      var res = handler.apply(null, arguments);
7498      if (res !== null) {
7499        remove$2(event, onceHandler, capture, _target);
7500      }
7501    }
7502  }
7503
7504  // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
7505  // implementation and does not fire microtasks in between event propagation, so
7506  // safe to exclude.
7507  var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
7508
7509  function add$1 (
7510    name,
7511    handler,
7512    capture,
7513    passive
7514  ) {

7515    // async edge case #6566: inner click event triggers patch, event handler
7516    // attached to outer element during patch, and triggered again. This
7517    // happens because browsers fire microtask ticks between event propagation.
7518    // the solution is simple: we save the timestamp when a handler is attached,
7519    // and the handler would only fire if the event passed to it was fired
7520    // AFTER it was attached.
7521    if (useMicrotaskFix) {
7522      var attachedTimestamp = currentFlushTimestamp;
7523      var original = handler;
7524      handler = original._wrapper = function (e) {
7525        if (
7526          // no bubbling, should always fire.
7527          // this is just a safety net in case event.timeStamp is unreliable in
7528          // certain weird environments...
7529          e.target === e.currentTarget ||
7530          // event is fired after handler attachment
7531          e.timeStamp >= attachedTimestamp ||
7532          // bail for environments that have buggy event.timeStamp implementations
7533          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
7534          // #9681 QtWebEngine event.timeStamp is negative value
7535          e.timeStamp <= 0 ||
7536          // #9448 bail if event is fired in another document in a multi-page
7537          // electron/nw.js app, since event.timeStamp will be using a different
7538          // starting reference
7539          e.target.ownerDocument !== document
7540        ) {
7541          return original.apply(this, arguments)
7542        }
7543      };
7544    }
7545    target$1.addEventListener(
7546      name,
7547      handler,
7548      supportsPassive
7549        ? { capture: capture, passive: passive }
7550        : capture
7551    );
7552  }
7553
7554  function remove$2 (
7555    name,
7556    handler,
7557    capture,
7558    _target
7559  ) {
7560    (_target || target$1).removeEventListener(
7561      name,
7562      handler._wrapper || handler,
7563      capture
7564    );
7565  }
7566
7567  function updateDOMListeners (oldVnode, vnode) {
7568    if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
7569      return
7570    }
7571    var on = vnode.data.on || {};
7572    var oldOn = oldVnode.data.on || {};
7573    target$1 = vnode.elm;
7574    normalizeEvents(on);
7575    updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
7576    target$1 = undefined;
7577  }
7578
7579  var events = {
7580    create: updateDOMListeners,
7581    update: updateDOMListeners
7582  };
7583
7584  /*  */
7585
7586  var svgContainer;
7587
7588  function updateDOMProps (oldVnode, vnode) {
7589    if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
7590      return
7591    }
7592    var key, cur;
7593    var elm = vnode.elm;
7594    var oldProps = oldVnode.data.domProps || {};
7595    var props = vnode.data.domProps || {};
7596    // clone observed objects, as the user probably wants to mutate it
7597    if (isDef(props.__ob__)) {
7598      props = vnode.data.domProps = extend({}, props);
7599    }
7600
7601    for (key in oldProps) {
7602      if (!(key in props)) {
7603        elm[key] = '';
7604      }
7605    }
7606
7607    for (key in props) {
7608      cur = props[key];
7609      // ignore children if the node has textContent or innerHTML,
7610      // as these will throw away existing DOM nodes and cause removal errors
7611      // on subsequent patches (#3360)
7612      if (key === 'textContent' || key === 'innerHTML') {
7613        if (vnode.children) { vnode.children.length = 0; }
7614        if (cur === oldProps[key]) { continue }
7615        // #6601 work around Chrome version <= 55 bug where single textNode
7616        // replaced by innerHTML/textContent retains its parentNode property
7617        if (elm.childNodes.length === 1) {
7618          elm.removeChild(elm.childNodes[0]);
7619        }
7620      }
7621
7622      if (key === 'value' && elm.tagName !== 'PROGRESS') {
7623        // store value as _value as well since
7624        // non-string values will be stringified
7625        elm._value = cur;
7626        // avoid resetting cursor position when value is the same
7627        var strCur = isUndef(cur) ? '' : String(cur);
7628        if (shouldUpdateValue(elm, strCur)) {
7629          elm.value = strCur;
7630        }
7631      } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
7632        // IE doesn't support innerHTML for SVG elements
7633        svgContainer = svgContainer || document.createElement('div');
7634        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
7635        var svg = svgContainer.firstChild;
7636        while (elm.firstChild) {
7637          elm.removeChild(elm.firstChild);
7638        }
7639        while (svg.firstChild) {
7640          elm.appendChild(svg.firstChild);
7641        }
7642      } else if (
7643        // skip the update if old and new VDOM state is the same.
7644        // `value` is handled separately because the DOM value may be temporarily
7645        // out of sync with VDOM state due to focus, composition and modifiers.
7646        // This  #4521 by skipping the unnecesarry `checked` update.
7647        cur !== oldProps[key]
7648      ) {
7649        // some property updates can throw
7650        // e.g. `value` on <progress> w/ non-finite value
7651        try {
7652          elm[key] = cur;
7653        } catch (e) {}
7654      }
7655    }
7656  }
7657
7658  // check platforms/web/util/attrs.js acceptValue
7659
7660
7661  function shouldUpdateValue (elm, checkVal) {
7662    return (!elm.composing && (
7663      elm.tagName === 'OPTION' ||
7664      isNotInFocusAndDirty(elm, checkVal) ||
7665      isDirtyWithModifiers(elm, checkVal)
7666    ))
7667  }
7668
7669  function isNotInFocusAndDirty (elm, checkVal) {
7670    // return true when textbox (.number and .trim) loses focus and its value is
7671    // not equal to the updated value
7672    var notInFocus = true;
7673    // #6157
7674    // work around IE bug when accessing document.activeElement in an iframe
7675    try { notInFocus = document.activeElement !== elm; } catch (e) {}
7676    return notInFocus && elm.value !== checkVal
7677  }
7678
7679  function isDirtyWithModifiers (elm, newVal) {
7680    var value = elm.value;
7681    var modifiers = elm._vModifiers; // injected by v-model runtime
7682    if (isDef(modifiers)) {
7683      if (modifiers.number) {
7684        return toNumber(value) !== toNumber(newVal)
7685      }
7686      if (modifiers.trim) {
7687        return value.trim() !== newVal.trim()
7688      }
7689    }
7690    return value !== newVal
7691  }
7692
7693  var domProps = {
7694    create: updateDOMProps,
7695    update: updateDOMProps
7696  };
7697
7698  /*  */
7699
7700  var parseStyleText = cached(function (cssText) {
7701    var res = {};
7702    var listDelimiter = /;(?![^(]*\))/g;
7703    var propertyDelimiter = /:(.+)/;
7704    cssText.split(listDelimiter).forEach(function (item) {
7705      if (item) {
7706        var tmp = item.split(propertyDelimiter);
7707        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
7708      }
7709    });
7710    return res
7711  });
7712
7713  // merge static and dynamic style data on the same vnode
7714  function normalizeStyleData (data) {
7715    var style = normalizeStyleBinding(data.style);
7716    // static style is pre-processed into an object during compilation
7717    // and is always a fresh object, so it's safe to merge into 

7717it
7718    return data.staticStyle
7719      ? extend(data.staticStyle, style)
7720      : style
7721  }
7722
7723  // normalize possible array / string values into Object
7724  function normalizeStyleBinding (bindingStyle) {
7725    if (Array.isArray(bindingStyle)) {
7726      return toObject(bindingStyle)
7727    }
7728    if (typeof bindingStyle === 'string') {
7729      return parseStyleText(bindingStyle)
7730    }
7731    return bindingStyle
7732  }
7733
7734  /**
7735   * parent component style should be after child's
7736   * so that parent component's style could override it
7737   */
7738  function getStyle (vnode, checkChild) {
7739    var res = {};
7740    var styleData;
7741
7742    if (checkChild) {
7743      var childNode = vnode;
7744      while (childNode.componentInstance) {
7745        childNode = childNode.componentInstance._vnode;
7746        if (
7747          childNode && childNode.data &&
7748          (styleData = normalizeStyleData(childNode.data))
7749        ) {
7750          extend(res, styleData);
7751        }
7752      }
7753    }
7754
7755    if ((styleData = normalizeStyleData(vnode.data))) {
7756      extend(res, styleData);
7757    }
7758
7759    var parentNode = vnode;
7760    while ((parentNode = parentNode.parent)) {
7761      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
7762        extend(res, styleData);
7763      }
7764    }
7765    return res
7766  }
7767
7768  /*  */
7769
7770  var cssVarRE = /^--/;
7771  var importantRE = /\s*!important$/;
7772  var setProp = function (el, name, val) {
7773    /* istanbul ignore if */
7774    if (cssVarRE.test(name)) {
7775      el.style.setProperty(name, val);
7776    } else if (importantRE.test(val)) {
7777      el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
7778    } else {
7779      var normalizedName = normalize(name);
7780      if (Array.isArray(val)) {
7781        // Support values array created by autoprefixer, e.g.
7782        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
7783        // Set them one by one, and the browser will only set those it can recognize
7784        for (var i = 0, len = val.length; i < len; i++) {
7785          el.style[normalizedName] = val[i];
7786        }
7787      } else {
7788        el.style[normalizedName] = val;
7789      }
7790    }
7791  };
7792
7793  var vendorNames = ['Webkit', 'Moz', 'ms'];
7794
7795  var emptyStyle;
7796  var normalize = cached(function (prop) {
7797    emptyStyle = emptyStyle || document.createElement('div').style;
7798    prop = camelize(prop);
7799    if (prop !== 'filter' && (prop in emptyStyle)) {
7800      return prop
7801    }
7802    var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
7803    for (var i = 0; i < vendorNames.length; i++) {
7804      var name = vendorNames[i] + capName;
7805      if (name in emptyStyle) {
7806        return name
7807      }
7808    }
7809  });
7810
7811  function updateStyle (oldVnode, vnode) {
7812    var data = vnode.data;
7813    var oldData = oldVnode.data;
7814
7815    if (isUndef(data.staticStyle) && isUndef(data.style) &&
7816      isUndef(oldData.staticStyle) && isUndef(oldData.style)
7817    ) {
7818      return
7819    }
7820
7821    var cur, name;
7822    var el = vnode.elm;
7823    var oldStaticStyle = oldData.staticStyle;
7824    var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
7825
7826    // if static style exists, stylebinding already merged into it when doing normalizeStyleData
7827    var oldStyle = oldStaticStyle || oldStyleBinding;
7828
7829    var style = normalizeStyleBinding(vnode.data.style) || {};
7830
7831    // store normalized style under a different key for next diff
7832    // make sure to clone it if it's reactive, since the user likely wants
7833    // to mutate it.
7834    vnode.data.normalizedStyle = isDef(style.__ob__)
7835      ? extend({}, style)
7836      : style;
7837
7838    var newStyle = getStyle(vnode, true);
7839
7840    for (name in oldStyle) {
7841      if (isUndef(newStyle[name])) {
7842        setProp(el, name, '');
7843      }
7844    }
7845    for (name in newStyle) {
7846      cur = newStyle[name];
7847      if (cur !== oldStyle[name]) {
7848        // ie9 setting to null has no effect, must use empty string
7849        setProp(el, name, cur == null ? '' : cur);
7850      }
7851    }
7852  }
7853
7854  var style = {
7855    create: updateStyle,
7856    update: updateStyle
7857  };
7858
7859  /*  */
7860
7861  var whitespaceRE = /\s+/;
7862
7863  /**
7864   * Add class with compatibility for SVG since classList is not supported on
7865   * SVG elements in IE
7866   */
7867  function addClass (el, cls) {
7868    /* istanbul ignore if */
7869    if (!cls || !(cls = cls.trim())) {
7870      return
7871    }
7872
7873    /* istanbul ignore else */
7874    if (el.classList) {
7875      if (cls.indexOf(' ') > -1) {

7876        cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
7877      } else {
7878        el.classList.add(cls);
7879      }
7880    } else {
7881      var cur = " " + (el.getAttribute('class') || '') + " ";
7882      if (cur.indexOf(' ' + cls + ' ') < 0) {
7883        el.setAttribute('class', (cur + cls).trim());
7884      }
7885    }
7886  }
7887
7888  /**
7889   * Remove class with compatibility for SVG since classList is not supported on
7890   * SVG elements in IE
7891   */
7892  function removeClass (el, cls) {
7893    /* istanbul ignore if */
7894    if (!cls || !(cls = cls.trim())) {
7895      return
7896    }
7897
7898    /* istanbul ignore else */
7899    if (el.classList) {
7900      if (cls.indexOf(' ') > -1) {
7901        cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
7902      } else {
7903        el.classList.remove(cls);
7904      }
7905      if (!el.classList.length) {
7906        el.removeAttribute('class');
7907      }
7908    } else {
7909      var cur = " " + (el.getAttribute('class') || '') + " ";
7910      var tar = ' ' + cls + ' ';
7911      while (cur.indexOf(tar) >= 0) {
7912        cur = cur.replace(tar, ' ');
7913      }
7914      cur = cur.trim();
7915      if (cur) {
7916        el.setAttribute('class', cur);
7917      } else {
7918        el.removeAttribute('class');
7919      }
7920    }
7921  }
7922
7923  /*  */
7924
7925  function resolveTransition (def$$1) {
7926    if (!def$$1) {
7927      return
7928    }
7929    /* istanbul ignore else */
7930    if (typeof def$$1 === 'object') {
7931      var res = {};
7932      if (def$$1.css !== false) {
7933        extend(res, autoCssTransition(def$$1.name || 'v'));
7934      }
7935      extend(res, def$$1);
7936      return res
7937    } else if (typeof def$$1 === 'string') {
7938      return autoCssTransition(def$$1)
7939    }
7940  }
7941
7942  var autoCssTransition = cached(function (name) {
7943    return {
7944      enterClass: (name + "-enter"),
7945      enterToClass: (name + "-enter-to"),
7946      enterActiveClass: (name + "-enter-active"),
7947      leaveClass: (name + "-leave"),
7948      leaveToClass: (name + "-leave-to"),
7949      leaveActiveClass: (name + "-leave-active")
7950    }
7951  });
7952
7953  var hasTransition = inBrowser && !isIE9;
7954  var TRANSITION = 'transition';
7955  var ANIMATION = 'animation';
7956
7957  // Transition property/event sniffing
7958  var transitionProp = 'transition';
7959  var transitionEndEvent = 'transitionend';
7960  var animationProp = 'animation';
7961  var animationEndEvent = 'animationend';
7962  if (hasTransition) {
7963    /* istanbul ignore if */
7964    if (window.ontransitionend === undefined &&
7965      window.onwebkittransitionend !== undefined
7966    ) {
7967      transitionProp = 'WebkitTransition';
7968      transitionEndEvent = 'webkitTransitionEnd';
7969    }
7970    if (window.onanimationend === undefined &&
7971      window.onwebkitanimationend !== undefined
7972    ) {
7973      animationProp = 'WebkitAnimation';
7974      animationEndEvent = 'webkitAnimationEnd';
7975    }
7976  }
7977
7978  // binding to window is necessary to make hot reload work in IE in strict mode
7979  var raf = inBrowser
7980    ? window.requestAnimationFrame
7981      ? window.requestAnimationFrame.bind(window)
7982      : setTimeout
7983    : /* istanbul ignore next */ function (fn) { return fn(); };
7984
7985  function nextFrame (fn) {
7986    raf(function () {
7987      raf(fn);
7988    });
7989  }
7990
7991  function addTransitionClass (el, cls) {
7992    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
7993    if (transitionClasses.indexOf(cls) < 0) {
7994      transitionClasses.push(cls);
7995      addClass(el, cls);
7996    }
7997  }
7998
7999  function removeTransitionClass (el, cls) {
8000    if (el._transitionClasses) {
8001      remove(el._transitionClasses, cls);
8002    }
8003    removeClass(el, cls);
8004  }
8005
8006  function whenTransitionEnds (
8007    el,
8008    expectedType,
8009    cb
8010  ) {
8011    var ref = getTransitionInfo(el, expectedType);
8012    var type = ref.type;
8013    var timeout = ref.timeout;
8014    var propCount = ref.propCount;
8015    if (!type) { return cb() }
8016    var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
8017    var ended = 0;
8018    var end = function () {
8019      el.removeEventListener(event, onEnd);
8020      cb();
8021    };
8022    var onEnd = function (e) {
8023      if (e.target === el) {
8024        if (++ended >= propCount) {
8025          end();
8026        }
8027      }
8028    };
8029    setTimeout(function () {
8030      if (ended < propCount) {
8031        end();
8032      }
8033    }, timeout + 1);
8034    el.addEventListener(event, onEnd);
8035  }
8036
8037  var transformRE = /\b(transform|all)(,|$)/;
8038
8039  function getTransitionInfo (el, expectedType) {
8040    var styles = window.getComputedStyle(el);
8041    // JSDOM may return undefined for transition properties
8042    var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
8043    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
8044    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
8045    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
8046    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
8047    var animationTimeout = getTimeout(animationDelays, animationDurations);
8048
8049    var type;
8050    var timeout = 0;
8051    var propCount = 0;
8052    /* istanbul ignore if */
8053    if (expectedType === TRANSITION) {
8054      if (transitionTimeout > 0) {
8055        type = TRANSITION;
8056        timeout = transitionTimeout;
8057        propCount = transitionDurations.length;
8058      }
8059    } else if (expectedType === ANIMATION) {
8060      if (animationTimeout > 0) {
8061        type = ANIMATION;
8062        timeout = animationTimeout;
8063        propCount = animationDurations.length;
8064      }
8065    } else {
8066      timeout = Math.max(transitionTimeout, animationTimeout);
8067      type = timeout > 0
8068        ? transitionTimeout > animationTimeout
8069          ? TRANSITION
8070          : ANIMATION
8071        : null;
8072      propCount = type
8073        ? type === TRANSITION
8074          ? transitionDurations.length
8075          : animationDurations.length
8076        : 0;
8077    }
8078    var hasTransform =
8079      type === TRANSITION &&
8080      transformRE.test(styles[transitionProp + 'Property']);
8081    return {
8082      type: type,
8083      timeout: timeout,
8084      propCount: propCount,
8085      hasTransform: hasTransform
8086    }
8087  }
8088
8089  function getTimeout (delays, durations) {
8090    /* istanbul ignore next */
8091    while (delays.length < durations.length) {
8092      delays = delays.concat(delays);
8093    }
8094
8095    return Math.max.apply(null, durations.map(function (d, i) {
8096      return toMs(d) + toMs(delays[i])
8097    }))
8098  }
8099
8100  // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
8101  // in a locale-dependent way, using a comma instead of a dot.
8102  // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
8103  // as a floor function) causing unexpected behaviors
8104  function toMs (s) {
8105    return Number(s.slice(0, -1).replace(',', '.')) * 1000
8106  }
8107
8108  /*  */
8109
8110  function enter (vnode, toggleDisplay) {
8111    var el = vnode.elm;
8112
8113    // call leave callback now
8114    if (isDef(el._leaveCb)) {
8115      el._leaveCb.cancelled = true;
8116      el._leaveCb();
8117    }
8118
8119    var data = resolveTransition(vnode.data.transition);
8120    if (isUndef(data)) {
8121      return
8122    }
8123
8124    /* istanbul ignore if */
8125    if (isDef(el._enterCb) || el.nodeType !== 1) {
8126      return
8127    }
8128
8129    var css = data.css;
8130    var type = data.type;
8131    var enterClass = data.enterClass;
8132    var enterToClass = data.enterToClass;
8133    var enterActiveClass = data.enterActiveClass;
8134    var appearClass = data.appearClass;
8135    var appearToClass = data.appearToClass;
8136    var appearActiveClass = data.appearActiveClass;
8137    var beforeEnter = data.beforeEnter;
8138    var enter = data.enter;
8139    var afterEnter = data.afterEnter;
8140    var enterCancelled = data.enterCancelled;
8141    var beforeAppear = data.beforeAppear;
8142    var appear = data.appear;
8143    var afterAppear = data.afterAppear;
8144    var appearCancelled = data.appearCancelled;
8145    var duration = data.duration;
8146
8147    // activeInstance will always be the <transition> component managing this
8148    // transition. One edge case to check is when the <transition> is placed
8149    // as the root node of a child component. In that case we need to check
8150    // <transition>'s parent for appear check.
8151    var context = activeInstance;
8152    var transitionNode = activeInstance.$vnode;
8153    while (transitionNode && transitionNode.parent) {
8154      context = transitionNode.context;
8155      transitionNode = transitionNode.parent;
8156    }
8157
8158    var isAppear = !context._isMounted || !vnode.isRootInsert;
8159
8160    if (isAppear && !appear && appear !== '') {
8161      return
8162    }
8163
8164    var startClass = isAppear && appearClass
8165      ? appearClass
8166      : enterClass;
8167    var activeClass = isAppear && appearActiveClass
8168      ? appearActiveClass
8169      : enterActiveClass;
8170    var toClass = isAppear && appearToClass
8171      ? appearToClass
8172      : enterToClass;
8173
8174    var beforeEnterHook = isAppear
8175      ? (beforeAppear || beforeEnter)
8176      : beforeEnter;
8177    var enterHook = isAppear
8178      ? (typeof appear === 'function' ? appear : enter)
8179      : enter;
8180    var afterEnterHook = isAppear
8181      ? (afterAppear || afterEnter)
8182      : afterEnter;
8183    var enterCancelledHook = isAppear
8184      ? (appearCancelled || enterCancelled)
8185      : enterCancelled;
8186
8187    var explicitEnterDuration = toNumber(
8188      isObject(duration)
8189        ? duration.enter
8190        : duration
8191    );
8192
8193    if (explicitEnterDuration != null) {
8194      checkDuration(explicitEnterDuration, 'enter', vnode);
8195    }
8196
8197    var expectsCSS = css !== false && !isIE9;
8198    var userWantsControl = getHookArgumentsLength(enterHook);
8199
8200    var cb = el._enterCb = once(function () {
8201      if (expectsCSS) {
8202        removeTransitionClass(el, toClass);
8203        removeTransitionClass(el, activeClass);
8204      }
8205      if (cb.cancelled) {
8206        if (expectsCSS) {
8207          removeTransitionClass(el, startClass);
8208        }
8209        enterCancelledHook && enterCancelledHook(el);
8210      } else {
8211        afterEnterHook && afterEnterHook(el);
8212      }
8213      el._enterCb = null;
8214    });
8215
8216    if (!vnode.data.show) {
8217      // remove pending leave element on enter by injecting an insert hook
8218      mergeVNodeHook(vnode, 'insert', function () {
8219        var parent = el.parentNode;
8220        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
8221        if (pendingNode &&
8222          pendingNode.tag === vnode.tag &&
8223          pendingNode.elm._leaveCb
8224        ) {
8225          pendingNode.elm._leaveCb();
8226        }
8227        enterHook && enterHook(el, cb);
8228      });
8229    }
8230
8231    // start enter transition
8232    beforeEnterHook && beforeEnterHook(el);
8233    if (expectsCSS) {
8234      addTransitionClass(el, startClass);
8235      addTransitionClass(el, activeClass);
8236      nextFrame(function () {
8237        removeTransitionClass(el, startClass);
8238        if (!cb.cancelled) {
8239          addTransitionClass(el, toClass);
8240          if (!userWantsControl) {
8241            if (isValidDuration(explicitEnterDuration)) {
8242              setTimeout(cb, explicitEnterDuration);
8243            } else {
8244              whenTransitionEnds(el, type, cb);
8245            }
8246          }
8247        }
8248      });
8249    }
8250
8251    if (vnode.data.show) {
8252      toggleDisplay && toggleDisplay();
8253      enterHook && enterHook(el, cb);
8254    }
8255
8256    if (!expectsCSS && !userWantsControl) {
8257      cb();
8258    }
8259  }
8260
8261  function leave (vnode, rm) {
8262    var el = vnode.elm;
8263
8264    // call enter callback now
8265    if (isDef(el._enterCb)) {
8266      el._enterCb.cancelled = true;
8267      el._enterCb();
8268    }
8269
8270    var data = resolveTransition(vnode.data.transition);
8271    if (isUndef(data) || el.nodeType !== 1) {
8272      return rm()
8273    }
8274
8275    /* istanbul ignore if */
8276    if (isDef(el._leaveCb)) {
8277      return
8278    }
8279
8280    var css = data.css;
8281    var type = data.type;
8282    var leaveClass = data.leaveClass;
8283    var leaveToClass = data.leaveToClass;
8284    var leaveActiveClass = data.leaveActiveClass;
8285    var beforeLeave = data.beforeLeave;
8286    var leave = data.leave;
8287    var afterLeave = data.afterLeave;
8288    var leaveCancelled = data.leaveCancelled;
8289    var delayLeave = data.delayLeave;
8290    var duration = data.duration;
8291
8292    var expectsCSS = css !== false && !isIE9;
8293    var userWantsControl = getHookArgumentsLength(leave);
8294
8295    var explicitLeaveDuration = toNumber(
8296      isObject(duration)
8297        ? duration.leave
8298        : duration
8299    );
8300

8301    if (isDef(explicitLeaveDuration)) {
8302      checkDuration(explicitLeaveDuration, 'leave', vnode);
8303    }
8304
8305    var cb = el._leaveCb = once(function () {
8306      if (el.parentNode && el.parentNode._pending) {
8307        el.parentNode._pending[vnode.key] = null;
8308      }
8309      if (expectsCSS) {
8310        removeTransitionClass(el, leaveToClass);
8311        removeTransitionClass(el, leaveActiveClass);
8312      }
8313      if (cb.cancelled) {
8314        if (expectsCSS) {
8315          removeTransitionClass(el, leaveClass);
8316        }
8317        leaveCancelled && leaveCancelled(el);
8318      } else {
8319        rm();
8320        afterLeave && afterLeave(el);
8321      }
8322      el._leaveCb = null;
8323    });
8324
8325    if (delayLeave) {
8326      delayLeave(performLeave);
8327    } else {
8328      performLeave();
8329    }
8330
8331    function performLeave () {
8332      // the delayed leave may have already been cancelled
8333      if (cb.cancelled) {
8334        return
8335      }
8336      // record leaving element
8337      if (!vnode.data.show && el.parentNode) {
8338        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
8339      }
8340      beforeLeave && beforeLeave(el);
8341      if (expectsCSS) {
8342        addTransitionClass(el, leaveClass);
8343        addTransitionClass(el, leaveActiveClass);
8344        nextFrame(function () {
8345          removeTransitionClass(el, leaveClass);
8346          if (!cb.cancelled) {
8347            addTransitionClass(el, leaveToClass);
8348            if (!userWantsControl) {
8349              if (isValidDuration(explicitLeaveDuration)) {
8350                setTimeout(cb, explicitLeaveDuration);
8351              } else {
8352                whenTransitionEnds(el, type, cb);
8353              }
8354            }
8355          }
8356        });
8357      }
8358      leave && leave(el, cb);
8359      if (!expectsCSS && !userWantsControl) {
8360        cb();
8361      }
8362    }
8363  }
8364
8365  // only used in dev mode
8366  function checkDuration (val, name, vnode) {
8367    if (typeof val !== 'number') {
8368      warn(
8369        "<transition> explicit " + name + " duration is not a valid number - " +
8370        "got " + (JSON.stringify(val)) + ".",
8371        vnode.context
8372      );
8373    } else if (isNaN(val)) {
8374      warn(
8375        "<transition> explicit " + name + " duration is NaN - " +
8376        'the duration expression might be incorrect.',
8377        vnode.context
8378      );
8379    }
8380  }
8381
8382  function isValidDuration (val) {
8383    return typeof val === 'number' && !isNaN(val)
8384  }
8385
8386  /**
8387   * Normalize a transition hook's argument length. The hook may be:
8388   * - a merged hook (invoker) with the original in .fns
8389   * - a wrapped component method (check ._length)
8390   * - a plain function (.length)
8391   */
8392  function getHookArgumentsLength (fn) {
8393    if (isUndef(fn)) {
8394      return false
8395    }
8396    var invokerFns = fn.fns;
8397    if (isDef(invokerFns)) {
8398      // invoker
8399      return getHookArgumentsLength(
8400        Array.isArray(invokerFns)
8401          ? invokerFns[0]
8402          : invokerFns
8403      )
8404    } else {
8405      return (fn._length || fn.length) > 1
8406    }
8407  }
8408
8409  function _enter (_, vnode) {
8410    if (vnode.data.show !== true) {
8411      enter(vnode);
8412    }
8413  }
8414
8415  var transition = inBrowser ? {
8416    create: _enter,
8417    activate: _enter,
8418    remove: function remove$$1 (vnode, rm) {
8419      /* istanbul ignore else */
8420      if (vnode.data.show !== true) {
8421        leave(vnode, rm);
8422      } else {
8423        rm();
8424      }
8425    }
8426  } : {};
8427
8428  var platformModules = [
8429    attrs,
8430    klass,
8431    events,
8432    domProps,
8433    style,
8434    transition
8435  ];
8436
8437  /*  */
8438
8439  // the directive module should be applied last, after all
8440  // built-in modules have been applied.
8441  var modules = platformModules.concat(baseModules);
8442
8443  var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
8444
8445  /**
8446   * Not type checking this file because flow doesn't like attaching
8447   * properties to Elements.
8448   */
8449
8450  /* istanbul ignore if */
8451  if (isIE9) {
8452    // http://www.matts411.com/post/internet-explorer-9-oninput/
8453    document.addEventListener('selectionchange', function () {
8454      var el = document.activeElement;
8455      if (el && el.vmodel) {
8456        trigger(el, 'input');
8457      }
8458    });
8459  }
8460
8461  var directive = {
8462    inserted: function inserted (el, binding, vnode, oldVnode) {
8463      if (vnode.tag === 'select') {
8464        // #6903
8465        if (oldVnode.elm && !oldVnode.elm._vOptions) {
8466          mergeVNodeHook(vnode, 'postpatch', function () {
8467            directive.componentUpdated(el, binding, vnode);
8468          });
8469        } else {
8470          setSelected(el, binding, vnode.context);
8471        }
8472        el._vOptions = [].map.call(el.options, getValue);
8473      } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
8474        el._vModifiers = binding.modifiers;
8475        if (!binding.modifiers.lazy) {
8476          el.addEventListener('compositionstart', onCompositionStart);
8477          el.addEventListener('compositionend', onCompositionEnd);
8478          // Safari < 10.2 & UIWebView doesn't fire compositionend when
8479          // switching focus before confirming composition choice
8480          // this also fixes the issue where some browsers e.g. iOS Chrome
8481          // fires "change" instead of "input" on autocomplete.
8482          el.addEventListener('change', onCompositionEnd);
8483          /* istanbul ignore if */
8484          if (isIE9) {
8485            el.vmodel = true;
8486          }
8487        }
8488      }
8489    },
8490
8491    componentUpdated: function componentUpdated (el, binding, vnode) {
8492      if (vnode.tag === 'select') {
8493        setSelected(el, binding, vnode.context);
8494        // in case the options rendered by v-for have changed,
8495        // it's possible that the value is out-of-sync with the rendered options.
8496        // detect such cases and filter out values that no longer has a matching
8497        // option in the DOM.
8498        var prevOptions = el._vOptions;
8499        var curOptions = el._vOptions = [].map.call(el.options, getValue);
8500        if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
8501          // trigger change event if
8502          // no matching option found for at least one value
8503          var needReset = el.multiple
8504            ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
8505            : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
8506          if (needReset) {
8507            trigger(el, 'change');
8508          }
8509        }
8510      }
8511    }
8512  };
8513
8514  function setSelected (el, binding, vm) {
8515    actuallySetSelected(el, binding, vm);
8516    /* istanbul ignore if */
8517    if (isIE || isEdge) {
8518      setTimeout(function () {
8519        actuallySetSelected(el, binding, vm);
8520      }, 0);
8521    }
8522  }
8523
8524  function actuallySetSelected (el, binding, vm) {
8525    var value = binding.value;
8526    var isMultiple = el.multiple;
8527    if (isMultiple && !Array.isArray(value)) {
8528      warn(
8529        "<select multiple v-model=\"" + (binding.expression) + "\"> " +
8530        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
8531        vm
8532      );
8533      return
8534    }
8535    var selected, option;
8536    for (var i = 0, l = el.options.length; i < l; i++) {
8537      option = el.options[i];
8538      if (isMultiple) {
8539        selected = looseIndexOf(value, getValue(option)) > -1;
8540        if (option.selected !== selected) {
8541          option.selected = selected;
8542        }
8543      } else {
8544        if (looseEqual(getValue(option), value)) {
8545          if (el.selectedIndex !== i) {
8546            el.selectedIndex = i;
8547          }
8548          return
8549        }
8550      }
8551    }
8552    if (!isMultiple) {
8553      el.selectedIndex = -1;
8554    }
8555  }
8556
8557  function hasNoMatchingOption (value, options) {
8558    return options.every(function (o) { return !looseEqual(o, value); })
8559  }
8560
8561  function getValue (option) {
8562    return '_value' in option
8563      ? option._value
8564      : option.value
8565  }
8566
8567  function onCompositionStart (e) {
8568    e.target.composing = true;
8569  }
8570
8571  function onCompositionEnd (e) {
8572    // prevent triggering an input event for no reason
8573    if (!e.target.composing) { return }
8574    e.target.composing = false;

8575    trigger(e.target, 'input');
8576  }
8577
8578  function trigger (el, type) {
8579    var e = document.createEvent('HTMLEvents');
8580    e.initEvent(type, true, true);
8581    el.dispatchEvent(e);
8582  }
8583
8584  /*  */
8585
8586  // recursively search for possible transition defined inside the component root
8587  function locateNode (vnode) {
8588    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
8589      ? locateNode(vnode.componentInstance._vnode)
8590      : vnode
8591  }
8592
8593  var show = {
8594    bind: function bind (el, ref, vnode) {
8595      var value = ref.value;
8596
8597      vnode = locateNode(vnode);
8598      var transition$$1 = vnode.data && vnode.data.transition;
8599      var originalDisplay = el.__vOriginalDisplay =
8600        el.style.display === 'none' ? '' : el.style.display;
8601      if (value && transition$$1) {
8602        vnode.data.show = true;
8603        enter(vnode, function () {
8604          el.style.display = originalDisplay;
8605        });
8606      } else {
8607        el.style.display = value ? originalDisplay : 'none';
8608      }
8609    },
8610
8611    update: function update (el, ref, vnode) {
8612      var value = ref.value;
8613      var oldValue = ref.oldValue;
8614
8615      /* istanbul ignore if */
8616      if (!value === !oldValue) { return }
8617      vnode = locateNode(vnode);
8618      var transition$$1 = vnode.data && vnode.data.transition;
8619      if (transition$$1) {
8620        vnode.data.show = true;
8621        if (value) {
8622          enter(vnode, function () {
8623            el.style.display = el.__vOriginalDisplay;
8624          });
8625        } else {
8626          leave(vnode, function () {
8627            el.style.display = 'none';
8628          });
8629        }
8630      } else {
8631        el.style.display = value ? el.__vOriginalDisplay : 'none';
8632      }
8633    },
8634
8635    unbind: function unbind (
8636      el,
8637      binding,
8638      vnode,
8639      oldVnode,
8640      isDestroy
8641    ) {
8642      if (!isDestroy) {
8643        el.style.display = el.__vOriginalDisplay;
8644      }
8645    }
8646  };
8647
8648  var platformDirectives = {
8649    model: directive,
8650    show: show
8651  };
8652
8653  /*  */
8654
8655  var transitionProps = {
8656    name: String,
8657    appear: Boolean,
8658    css: Boolean,
8659    mode: String,
8660    type: String,
8661    enterClass: String,
8662    leaveClass: String,
8663    enterToClass: String,
8664    leaveToClass: String,
8665    enterActiveClass: String,
8666    leaveActiveClass: String,
8667    appearClass: String,
8668    appearActiveClass: String,
8669    appearToClass: String,
8670    duration: [Number, String, Object]
8671  };
8672
8673  // in case the child is also an abstract component, e.g. <keep-alive>
8674  // we want to recursively retrieve the real component to be rendered
8675  function getRealChild (vnode) {
8676    var compOptions = vnode && vnode.componentOptions;
8677    if (compOptions && compOptions.Ctor.options.abstract) {
8678      return getRealChild(getFirstComponentChild(compOptions.children))
8679    } else {
8680      return vnode
8681    }
8682  }
8683
8684  function extractTransitionData (comp) {
8685    var data = {};
8686    var options = comp.$options;
8687    // props
8688    for (var key in options.propsData) {
8689      data[key] = comp[key];
8690    }
8691    // events.
8692    // extract listeners and pass them directly to the transition methods
8693    var listeners = options._parentListeners;
8694    for (var key$1 in listeners) {
8695      data[camelize(key$1)] = listeners[key$1];
8696    }
8697    return data
8698  }
8699
8700  function placeholder (h, rawChild) {
8701    if (/\d-keep-alive$/.test(rawChild.tag)) {
8702      return h('keep-alive', {
8703        props: rawChild.componentOptions.propsData
8704      })
8705    }
8706  }
8707
8708  function hasParentTransition (vnode) {
8709    while ((vnode = vnode.parent)) {
8710      if (vnode.data.transition) {
8711        return true
8712      }
8713    }
8714  }
8715
8716  function isSameChild (child, oldChild) {
8717    return oldChild.key === child.key && oldChild.tag === child.tag
8718  }
8719
8720  var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
8721
8722  var isVShowDirective = function (d) { return d.name === 'show'; };
8723
8724  var Transition = {
8725    name: 'transition',
8726    props: transitionProps,
8727    abstract: true,
8728
8729    render: function render (h) {
8730      var this$1 = this;
8731
8732      var children = this.$slots.default;
8733      if (!children) {
8734        return
8735      }
8736

8737      // filter out text nodes (possible whitespaces)
8738      children = children.filter(isNotTextNode);
8739      /* istanbul ignore if */
8740      if (!children.length) {
8741        return
8742      }
8743
8744      // warn multiple elements
8745      if (children.length > 1) {
8746        warn(
8747          '<transition> can only be used on a single element. Use ' +
8748          '<transition-group> for lists.',
8749          this.$parent
8750        );
8751      }
8752
8753      var mode = this.mode;
8754
8755      // warn invalid mode
8756      if (mode && mode !== 'in-out' && mode !== 'out-in'
8757      ) {
8758        warn(
8759          'invalid <transition> mode: ' + mode,
8760          this.$parent
8761        );
8762      }
8763
8764      var rawChild = children[0];
8765
8766      // if this is a component root node and the component's
8767      // parent container node also has transition, skip.
8768      if (hasParentTransition(this.$vnode)) {
8769        return rawChild
8770      }
8771
8772      // apply transition data to child
8773      // use getRealChild() to ignore abstract components e.g. keep-alive
8774      var child = getRealChild(rawChild);
8775      /* istanbul ignore if */
8776      if (!child) {
8777        return rawChild
8778      }
8779
8780      if (this._leaving) {
8781        return placeholder(h, rawChild)
8782      }
8783
8784      // ensure a key that is unique to the vnode type and to this transition
8785      // component instance. This key will be used to remove pending leaving nodes
8786      // during entering.
8787      var id = "__transition-" + (this._uid) + "-";
8788      child.key = child.key == null
8789        ? child.isComment
8790          ? id + 'comment'
8791          : id + child.tag
8792        : isPrimitive(child.key)
8793          ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
8794          : child.key;
8795
8796      var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
8797      var oldRawChild = this._vnode;
8798      var oldChild = getRealChild(oldRawChild);
8799
8800      // mark v-show
8801      // so that the transition module can hand over the control to the directive
8802      if (child.data.directives && child.data.directives.some(isVShowDirective)) {
8803        child.data.show = true;
8804      }
8805
8806      if (
8807        oldChild &&
8808        oldChild.data &&
8809        !isSameChild(child, oldChild) &&
8810        !isAsyncPlaceholder(oldChild) &&
8811        // #6687 component root is a comment node
8812        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
8813      ) {
8814        // replace old child transition data with fresh one
8815        // important for dynamic transitions!
8816        var oldData = oldChild.data.transition = extend({}, data);
8817        // handle transition mode
8818        if (mode === 'out-in') {
8819          // return placeholder node and queue update when leave finishes
8820          this._leaving = true;
8821          mergeVNodeHook(oldData, 'afterLeave', function () {
8822            this$1._leaving = false;
8823            this$1.$forceUpdate();
8824          });
8825          return placeholder(h, rawChild)
8826        } else if (mode === 'in-out') {
8827          if (isAsyncPlaceholder(child)) {
8828            return oldRawChild
8829          }
8830          var delayedLeave;
8831          var performLeave = function () { delayedLeave(); };
8832          mergeVNodeHook(data, 'afterEnter', performLeave);
8833          mergeVNodeHook(data, 'enterCancelled', performLeave);
8834          mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
8835        }
8836      }
8837
8838      return rawChild
8839    }
8840  };
8841
8842  /*  */
8843
8844  var props = extend({
8845    tag: String,
8846    moveClass: String
8847  }, transitionProps);
8848
8849  delete props.mode;
8850
8851  var TransitionGroup = {
8852    props: props,
8853
8854    beforeMount: function beforeMount () {
8855      var this$1 = this;
8856
8857      var update = this._update;
8858      this._update = function (vnode, hydrating) {
8859        var restoreActiveInstance = setActiveInstance(this$1);
8860        // force removing pass
8861        this$1.__patch__(
8862          this$1._vnode,
8863          this$1.kept,
8864          false, // hydrating
8865          true // removeOnly (!important, avoids unnecessary moves)
8866        );
8867        this$1._vnode = this$1.kept;
8868        restoreActiveInstance();
8869        update.call(this$1, vnode, hydrating);
8870      };
8871    },
8872
8873    render: function render (h) {
8874      var tag = this.tag || this.$vnode.data.tag || 'span';
8875      var map = Object.create(null);
8876      var prevChildren = this.prevChildren = this.children;
8877      var rawChildren = this.$slots.default || [];
8878      var children = this.children = [];
8879      var transitionData = extractTransitionData(this);
8880
8881      for (var i = 0; i < rawChildren.length; i++) {
8882        var c = rawChildren[i];
8883        if (c.tag) {
8884          if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
8885            children.push(c);
8886            map[c.key] = c
8887            ;(c.data || (c.data = {})).transition = transitionData;
8888          } else {

8889            var opts = c.componentOptions;
8890            var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
8891            warn(("<transition-group> children must be keyed: <" + name + ">"));
8892          }
8893        }
8894      }
8895
8896      if (prevChildren) {
8897        var kept = [];
8898        var removed = [];
8899        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
8900          var c$1 = prevChildren[i$1];
8901          c$1.data.transition = transitionData;
8902          c$1.data.pos = c$1.elm.getBoundingClientRect();
8903          if (map[c$1.key]) {
8904            kept.push(c$1);
8905          } else {
8906            removed.push(c$1);
8907          }
8908        }
8909        this.kept = h(tag, null, kept);
8910        this.removed = removed;
8911      }
8912
8913      return h(tag, null, children)
8914    },
8915
8916    updated: function updated () {
8917      var children = this.prevChildren;
8918      var moveClass = this.moveClass || ((this.name || 'v') + '-move');
8919      if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
8920        return
8921      }
8922
8923      // we divide the work into three loops to avoid mixing DOM reads and writes
8924      // in each iteration - which helps prevent layout thrashing.
8925      children.forEach(callPendingCbs);
8926      children.forEach(recordPosition);
8927      children.forEach(applyTranslation);
8928
8929      // force reflow to put everything in position
8930      // assign to this to avoid being removed in tree-shaking
8931      // $flow-disable-line
8932      this._reflow = document.body.offsetHeight;
8933
8934      children.forEach(function (c) {
8935        if (c.data.moved) {
8936          var el = c.elm;
8937          var s = el.style;
8938          addTransitionClass(el, moveClass);
8939          s.transform = s.WebkitTransform = s.transitionDuration = '';
8940          el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
8941            if (e && e.target !== el) {
8942              return
8943            }
8944            if (!e || /transform$/.test(e.propertyName)) {
8945              el.removeEventListener(transitionEndEvent, cb);
8946              el._moveCb = null;
8947              removeTransitionClass(el, moveClass);
8948            }
8949          });
8950        }
8951      });
8952    },
8953
8954    methods: {
8955      hasMove: function hasMove (el, moveClass) {
8956        /* istanbul ignore if */
8957        if (!hasTransition) {
8958          return false
8959        }
8960        /* istanbul ignore if */
8961        if (this._hasMove) {
8962          return this._hasMove
8963        }
8964        // Detect whether an element with the move class applied has
8965        // CSS transitions. Since the element may be inside an entering
8966        // transition at this very moment, we make a clone of it and remove
8967        // all other transition classes applied to ensure only the move class
8968        // is applied.
8969        var clone = el.cloneNode();
8970        if (el._transitionClasses) {
8971          el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
8972        }
8973        addClass(clone, moveClass);
8974        clone.style.display = 'none';
8975        this.$el.appendChild(clone);
8976        var info = getTransitionInfo(clone);
8977        this.$el.removeChild(clone);
8978        return (this._hasMove = info.hasTransform)
8979      }
8980    }
8981  };
8982
8983  function callPendingCbs (c) {
8984    /* istanbul ignore if */
8985    if (c.elm._moveCb) {
8986      c.elm._moveCb();
8987    }
8988    /* istanbul ignore if */
8989    if (c.elm._enterCb) {
8990      c.elm._enterCb();
8991    }
8992  }
8993
8994  function recordPosition (c) {
8995    c.data.newPos = c.elm.getBoundingClientRect();
8996  }
8997
8998  function applyTranslation (c) {
8999    var oldPos = c.data.pos;
9000    var newPos = c.data.newPos;
9001    var dx = oldPos.left - newPos.left;
9002    var dy = oldPos.top - newPos.top;
9003    if (dx || dy) {
9004      c.data.moved = true;
9005      var s = c.elm.style;
9006      s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
9007      s.transitionDuration = '0s';
9008    }
9009  }
9010
9011  var platformComponents = {
9012    Transition: Transition,
9013    TransitionGroup: TransitionGroup
9014  };
9015
9016  /*  */
9017
9018  // install platform specific utils
9019  Vue.config.mustUseProp = mustUseProp;
9020  Vue.config.isReservedTag = isReservedTag;
9021  Vue.config.isReservedAttr = isReservedAttr;
9022  Vue.config.getTagNamespace = getTagNamespace;
9023  Vue.config.isUnknownElement = isUnknownElement;
9024
9025  // install platform runtime directives & components
9026  extend(Vue.options.directives, platformDirectives);
9027  extend(Vue.options.components, platformComponents);
9028
9029  // install platform patch function
9030  Vue.prototype.__patch__ = inBrowser ? patch : noop;
9031
9032  // public mount method
9033  Vue.prototype.$mount = function (
9034    el,
9035    hydrating
9036  ) {
9037    el = el && inBrowser ? query(el) : undefined;
9038    return mountComponent(this, el, hydrating)
9039  };
9040
9041  // devtools global hook
9042  /* istanbul ignore next */
9043  if (inBrowser) {
9044    setTimeout(function () {
9045      if (config.devtools) {
9046        if (devtools) {
9047          devtools.emit('init', Vue);
9048        } else {
9049          console[console.info ? 'info' : 'log'](
9050            'Download the Vue Devtools extension for a better development experience:\n' +
9051            'https://github.com/vuejs/vue-devtools'
9052          );
9053        }
9054      }
9055      if (config.productionTip !== false &&
9056        typeof console !== 'undefined'
9057      ) {
9058        console[console.info ? 'info' : 'log'](
9059          "You are running Vue in development mode.\n" +
9060          "Make sure to turn on production mode when deploying for production.\n" +
9061          "See more tips at https://vuejs.org/guide/deployment.html"
9062        );
9063      }
9064    }, 0);
9065  }
9066
9067  /*  */
9068
9069  var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
9070  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
9071
9072  var buildRegex = cached(function (delimiters) {
9073    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
9074    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
9075    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
9076  });
9077
9078
9079
9080  function parseText (
9081    text,
9082    delimiters
9083  ) {
9084    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
9085    if (!tagRE.test(text)) {
9086      return
9087    }
9088    var tokens = [];
9089    var rawTokens = [];
9090    var lastIndex = tagRE.lastIndex = 0;
9091    var match, index, tokenValue;
9092    while ((match = tagRE.exec(text))) {
9093      index = match.index;
9094      // push text token
9095      if (index > lastIndex) {
9096        rawTokens.push(tokenValue = text.slice(lastIndex, index));
9097        tokens.push(JSON.stringify(tokenValue));
9098      }
9099      // tag token
9100      var exp = parseFilters(match[1].trim());
9101      tokens.push(("_s(" + exp + ")"));
9102      rawTokens.push({ '@binding': exp });
9103      lastIndex = index + match[0].length;
9104    }
9105    if (lastIndex < text.length) {
9106      rawTokens.push(tokenValue = text.slice(lastIndex));
9107      tokens.push(JSON.stringify(tokenValue));
9108    }
9109    return {
9110      expression: tokens.join('+'),
9111      tokens: rawTokens
9112    }
9113  }
9114
9115  /*  */
9116
9117  function transformNode (el, options) {
9118    var warn = options.warn || baseWarn;
9119    var staticClass = getAndRemoveAttr(el, 'class');
9120    if (staticClass) {
9121      var res = parseText(staticClass, options.delimiters);
9122      if (res) {
9123        warn(
9124          "class=\"" + staticClass + "\": " +
9125          'Interpolation inside attributes has been removed. ' +
9126          'Use v-bind or the colon shorthand instead. For example, ' +
9127          'instead of <div class="{{ val }}">, use <div :class="val">.',
9128          el.rawAttrsMap['class']
9129        );
9130      }
9131    }
9132    if (staticClass) {
9133      el.staticClass = JSON.stringify(staticClass);
9134    }
9135    var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
9136    if (classBinding) {
9137      el.classBinding = classBinding;
9138    }
9139  }
9140
9141  function genData (el) {
9142    var data = '';
9143    if (el.staticClass) {
9144      data += "staticClass:" + (el.staticClass) + ",";
9145    }
9146    if (el.classBinding) {
9147      data += "class:" + (el.classBinding) + ",";
9148    }
9149    return data
9150  }
9151
9152  var klass$1 = {
9153    staticKeys: ['staticClass'],
9154    transformNode: transformNode,
9155    genData: genData
9156  };
9157
9158  /*  */
9159
9160  function transformNode$1 (el, options) {
9161    var warn = options.warn || baseWarn;
9162    var staticStyle = getAndRemoveAttr(el, 'style');
9163    if (staticStyle) {
9164      /* istanbul ignore if */
9165      {
9166        var res = parseText(staticStyle, options.delimiters);
9167        if (res) {
9168          warn(
9169            "style=\"" + staticStyle + "\": " +
9170            'Interpolation inside attributes has been removed. ' +
9171            'Use v-bind or the colon shorthand instead. For example, ' +
9172            'instead of <div style="{{ val }}">, use <div :style="val">.',
9173            el.rawAttrsMap['style']
9174          );
9175        }
9176      }
9177      el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
9178    }
9179
9180    var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
9181    if (styleBinding) {
9182      el.styleBinding = styleBinding;
9183    }
9184  }
9185
9186  function genData$1 (el) {
9187    var data = '';
9188    if (el.staticStyle) {
9189      data += "staticStyle:" + (el.staticStyle) + ",";
9190    }
9191    if (el.styleBinding) {
9192      data += "style:(" + (el.styleBinding) + "),";
9193    }
9194    return data
9195  }
9196
9197  var style$1 = {
9198    staticKeys: ['staticStyle'],
9199    transformNode: transformNode$1,
9200    genData: genData$1
9201  };
9202
9203  /*  */
9204
9205  var decoder;
9206
9207  var he = {
9208    decode: function decode (html) {
9209      decoder = decoder || document.createElement('div');
9210      decoder.innerHTML = html;
9211      return decoder.textContent
9212    }
9213  };
9214
9215  /*  */
9216
9217  var isUnaryTag = makeMap(
9218    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
9219    'link,meta,param,source,track,wbr'
9220  );
9221
9222  // Elements that you can, intentionally, leave open
9223  // (and which close themselves)
9224  var canBeLeftOpenTag = makeMap(
9225    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
9226  );
9227
9228  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
9229  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
9230  var isNonPhrasingTag = makeMap(
9231    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
9232    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
9233    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
9234    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
9235    'title,tr,track'
9236  );
9237
9238  /**
9239   * Not type-checking this file because it's mostly vendor code.
9240   */
9241
9242  // Regular Expressions for parsing tags and attributes
9243  var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
9244  var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
9245  var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
9246  var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
9247  var startTagOpen = new RegExp(("^<" + qnameCapture));
9248  var startTagClose = /^\s*(\/?)>/;
9249  var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
9250  var doctype = /^<!DOCTYPE [^>]+>/i;
9251  // #7298: escape - to avoid being pased as HTML comment when inlined in page
9252  var comment = /^<!\--/;
9253  var conditionalComment = /^<!\[/;
9254
9255  // Special Elements (can contain anything)
9256  var isPlainTextElement = makeMap('script,style,textarea', true);
9257  var reCache = {};
9258
9259  var decodingMap = {
9260    '&lt;': '<',
9261    '&gt;': '>',
9262    '&quot;': '"',
9263    '&amp;': '&',
9264    '&#10;': '\n',
9265    '&#9;': '\t',
9266    '&#39;': "'"
9267  };
9268  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
9269  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
9270
9271  // #5992
9272  var isIgnoreNewlineTag = makeMap('pre,textarea', true);
9273  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
9274
9275  function decodeAttr (value, shouldDecodeNewlines) {
9276    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
9277    return value.replace(re, function (match) { return decodingMap[match]; })
9278  }
9279
9280  function parseHTML (html, options) {
9281    var stack = [];

9282    var expectHTML = options.expectHTML;
9283    var isUnaryTag$$1 = options.isUnaryTag || no;
9284    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
9285    var index = 0;
9286    var last, lastTag;
9287    while (html) {
9288      last = html;
9289      // Make sure we're not in a plaintext content element like script/style
9290      if (!lastTag || !isPlainTextElement(lastTag)) {
9291        var textEnd = html.indexOf('<');
9292        if (textEnd === 0) {
9293          // Comment:
9294          if (comment.test(html)) {
9295            var commentEnd = html.indexOf('-->');
9296
9297            if (commentEnd >= 0) {
9298              if (options.shouldKeepComment) {
9299                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
9300              }
9301              advance(commentEnd + 3);
9302              continue
9303            }
9304          }
9305
9306          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
9307          if (conditionalComment.test(html)) {
9308            var conditionalEnd = html.indexOf(']>');
9309
9310            if (conditionalEnd >= 0) {
9311              advance(conditionalEnd + 2);
9312              continue
9313            }
9314          }
9315
9316          // Doctype:
9317          var doctypeMatch = html.match(doctype);
9318          if (doctypeMatch) {
9319            advance(doctypeMatch[0].length);
9320            continue
9321          }
9322
9323          // End tag:
9324          var endTagMatch = html.match(endTag);
9325          if (endTagMatch) {
9326            var curIndex = index;
9327            advance(endTagMatch[0].length);
9328            parseEndTag(endTagMatch[1], curIndex, index);
9329            continue
9330          }
9331
9332          // Start tag:
9333          var startTagMatch = parseStartTag();
9334          if (startTagMatch) {
9335            handleStartTag(startTagMatch);
9336            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
9337              advance(1);
9338            }
9339            continue
9340          }
9341        }
9342
9343        var text = (void 0), rest = (void 0), next = (void 0);
9344        if (textEnd >= 0) {
9345          rest = html.slice(textEnd);
9346          while (
9347            !endTag.test(rest) &&
9348            !startTagOpen.test(rest) &&
9349            !comment.test(rest) &&
9350            !conditionalComment.test(rest)
9351          ) {
9352            // < in plain text, be forgiving and treat it as text
9353            next = rest.indexOf('<', 1);
9354            if (next < 0) { break }
9355            textEnd += next;
9356            rest = html.slice(textEnd);
9357          }
9358          text = html.substring(0, textEnd);
9359        }
9360
9361        if (textEnd < 0) {
9362          text = html;
9363        }
9364
9365        if (text) {
9366          advance(text.length);
9367        }
9368
9369        if (options.chars && text) {
9370          options.chars(text, index - text.length, index);
9371        }
9372      } else {
9373        var endTagLength = 0;
9374        var stackedTag = lastTag.toLowerCase();
9375        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
9376        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
9377          endTagLength = endTag.length;
9378          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
9379            text = text
9380              .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
9381              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
9382          }
9383          if (shouldIgnoreFirstNewline(stackedTag, text)) {
9384            text = text.slice(1);
9385          }
9386          if (options.chars) {
9387            options.chars(text);
9388          }
9389          return ''
9390        });
9391        index += html.length - rest$1.length;
9392        html = rest$1;
9393        parseEndTag(stackedTag, index - endTagLength, index);
9394      }
9395
9396      if (html === last) {
9397        options.chars && options.chars(html);
9398        if (!stack.length && options.warn) {
9399          options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
9400        }
9401        break
9402      }
9403    }
9404
9405    // Clean up any remaining tags
9406    parseEndTag();
9407
9408    function advance (n) {
9409      index += n;
9410      html = html.substring(n);
9411    }
9412
9413    function parseStartTag () {
9414      var start = html.match(startTagOpen);
9415      if (start) {
9416        var match = {
9417          tagName: start[1],
9418          attrs: [],
9419          start: index
9420        };
9421        advance(start[0].length);
9422        var end, attr;
9423        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
9424          attr.start = index;
9425          advance(attr[0].length);
9426          attr.end = index;
9427          match.attrs.push(attr);
9428        }
9429        if (end) {
9430          match.unarySlash = end[1];
9431          advance(end[0].length);
9432          match.end = index;
9433          return match
9434        }
9435      }
9436    }
9437
9438    function handleStartTag (match) {
9439      var tagName = match.tagName;
9440      var unarySlash = match.unarySlash;
9441
9442      if (expectHTML) {
9443        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
9444          parseEndTag(lastTag);
9445        }
9446        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
9447          parseEndTag(tagName);
9448        }
9449      }
9450
9451      var unary = isUnaryTag$$1(tagName) || !!unarySlash;
9452
9453      var l = match.attrs.length;
9454      var attrs = new Array(l);
9455      for (var i = 0; i < l; i++) {
9456        var args = match.attrs[i];
9457        var value = args[3] || args[4] || args[5] || '';
9458        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
9459          ? options.shouldDecodeNewlinesForHref
9460          : options.shouldDecodeNewlines;
9461        attrs[i] = {
9462          name: args[1],
9463          value: decodeAttr(value, shouldDecodeNewlines)
9464        };
9465        if (options.outputSourceRange) {
9466          attrs[i].start = args.start + args[0].match(/^\s*/).length;
9467          attrs[i].end = args.end;
9468        }
9469      }
9470
9471      if (!unary) {
9472        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
9473        lastTag = tagName;
9474      }
9475
9476      if (options.start) {
9477        options.start(tagName, attrs, unary, match.start, match.end);
9478      }
9479    }
9480
9481    function parseEndTag (tagName, start, end) {
9482      var pos, lowerCasedTagName;
9483      if (start == null) { start = index; }
9484      if (end == null) { end = index; }
9485
9486      // Find the closest opened tag of the same type
9487      if (tagName) {
9488        lowerCasedTagName = tagName.toLowerCase();
9489        for (pos = stack.length - 1; pos >= 0; pos--) {
9490          if (stack[pos].lowerCasedTag === lowerCasedTagName) {
9491            break
9492          }
9493        }
9494      } else {
9495        // If no tag name is provided, clean shop
9496        pos = 0;
9497      }
9498
9499      if (pos >= 0) {
9500        // Close all the open elements, up the stack
9501        for (var i = stack.length - 1; i >= pos; i--) {
9502          if (i > pos || !tagName &&
9503            options.warn
9504          ) {
9505            options.warn(
9506              ("tag <" + (stack[i].tag) + "> has no matching end tag."),
9507              { start: stack[i].start, end: stack[i].end }
9508            );
9509          }
9510          if (options.end) {
9511            options.end(stack[i].tag, start, end);
9512          }
9513        }
9514
9515        // Remove the open elements from the stack
9516        stack.length = pos;
9517        lastTag = pos && stack[pos - 1].tag;
9518      } else if (lowerCasedTagName === 'br') {
9519        if (options.start) {
9520          options.start(tagName, [], true, start, end);
9521        }
9522      } else if (lowerCasedTagName === 'p') {
9523        if (options.start) {
9524          options.start(tagName, [], false, start, end);
9525        }
9526        if (options.end) {
9527          options.end(tagName, start, end);
9528        }
9529      }
9530    }
9531  }
9532
9533  /*  */
9534
9535  var onRE = /^@|^v-on:/;
9536  var dirRE = /^v-|^@|^:/;
9537  var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
9538  var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
9539  var stripParensRE = /^\(|\)$/g;
9540  var dynamicArgRE = /^\[.*\]$/;
9541
9542  var argRE = /:(.*)$/;
9543  var bindRE = /^:|^\.|^v-bind:/;
9544  var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
9545
9546  var slotRE = /^v-slot(:|$)|^#/;
9547
9548  var lineBreakRE = /[\r\n]/;
9549  var whitespaceRE$1 = /\s+/g;
9550
9551  var invalidAttributeRE = /[\s"'<>\/=]/;
9552

9553  var decodeHTMLCached = cached(he.decode);
9554
9555  var emptySlotScopeToken = "_empty_";
9556
9557  // configurable state
9558  var warn$2;
9559  var delimiters;
9560  var transforms;
9561  var preTransforms;
9562  var postTransforms;
9563  var platformIsPreTag;
9564  var platformMustUseProp;
9565  var platformGetTagNamespace;
9566  var maybeComponent;
9567
9568  function createASTElement (
9569    tag,
9570    attrs,
9571    parent
9572  ) {
9573    return {
9574      type: 1,
9575      tag: tag,
9576      attrsList: attrs,
9577      attrsMap: makeAttrsMap(attrs),
9578      rawAttrsMap: {},
9579      parent: parent,
9580      children: []
9581    }
9582  }
9583
9584  /**
9585   * Convert HTML string to AST.
9586   */
9587  function parse (
9588    template,
9589    options
9590  ) {
9591    warn$2 = options.warn || baseWarn;
9592
9593    platformIsPreTag = options.isPreTag || no;
9594    platformMustUseProp = options.mustUseProp || no;
9595    platformGetTagNamespace = options.getTagNamespace || no;
9596    var isReservedTag = options.isReservedTag || no;
9597    maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
9598
9599    transforms = pluckModuleFunction(options.modules, 'transformNode');
9600    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
9601    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
9602
9603    delimiters = options.delimiters;
9604
9605    var stack = [];
9606    var preserveWhitespace = options.preserveWhitespace !== false;
9607    var whitespaceOption = options.whitespace;
9608    var root;
9609    var currentParent;
9610    var inVPre = false;
9611    var inPre = false;
9612    var warned = false;
9613
9614    function warnOnce (msg, range) {
9615      if (!warned) {
9616        warned = true;
9617        warn$2(msg, range);
9618      }
9619    }
9620
9621    function closeElement (element) {
9622      trimEndingWhitespace(element);
9623      if (!inVPre && !element.processed) {
9624        element = processElement(element, options);
9625      }
9626      // tree management
9627      if (!stack.length && element !== root) {
9628        // allow root elements with v-if, v-else-if and v-else
9629        if (root.if && (element.elseif || element.else)) {
9630          {
9631            checkRootConstraints(element);
9632          }
9633          addIfCondition(root, {
9634            exp: element.elseif,
9635            block: element
9636          });
9637        } else {
9638          warnOnce(
9639            "Component template should contain exactly one root element. " +
9640            "If you are using v-if on multiple elements, " +
9641            "use v-else-if to chain them instead.",
9642            { start: element.start }
9643          );
9644        }
9645      }
9646      if (currentParent && !element.forbidden) {
9647        if (element.elseif || element.else) {
9648          processIfConditions(element, currentParent);
9649        } else {
9650          if (element.slotScope) {
9651            // scoped slot
9652            // keep it in the children list so that v-else(-if) conditions can
9653            // find it as the prev node.
9654            var name = element.slotTarget || '"default"'
9655            ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
9656          }
9657          currentParent.children.push(element);
9658          element.parent = currentParent;
9659        }
9660      }
9661
9662      // final children cleanup
9663      // filter out scoped slots
9664      element.children = element.children.filter(function (c) { return !(c).slotScope; });
9665      // remove trailing whitespace node again
9666      trimEndingWhitespace(element);
9667
9668      // check pre state
9669      if (element.pre) {
9670        inVPre = false;
9671      }
9672      if (platformIsPreTag(element.tag)) {
9673        inPre = false;
9674      }
9675      // apply post-transforms
9676      for (var i = 0; i < postTransforms.length; i++) {
9677        postTransforms[i](element, options);
9678      }
9679    }
9680
9681    function trimEndingWhitespace (el) {
9682      // remove trailing whitespace node
9683      if (!inPre) {
9684        var lastNode;
9685        while (
9686          (lastNode = el.children[el.children.length - 1]) &&
9687          lastNode.type === 3 &&
9688          lastNode.text === ' '
9689        ) {
9690          el.children.pop();
9691        }
9692      }
9693    }
9694
9695    function checkRootConstraints (el) {
9696      if (el.tag === 'slot' || el.tag === 'template') {
9697        warnOnce(
9698          "Cannot use <" + (el.tag) + "> as component root element because it may " +
9699          'contain multiple nodes.',
9700          { start: el.start }
9701        );
9702      }
9703      if (el.attrsMap.hasOwnProperty('v-for')) {
9704        warnOnce(
9705          'Cannot use v-for on stateful component root element because ' +
9706          'it renders multiple elements.',
9707          el.rawAttrsMap['v-for']
9708        );
9709      }
9710    }
9711
9712    parseHTML(template, {
9713      warn: warn$2,
9714      expectHTML: options.expectHTML,
9715      isUnaryTag: options.isUnaryTag,
9716      canBeLeftOpenTag: options.canBeLeftOpenTag,
9717      shouldDecodeNewlines: options.shouldDecodeNewlines,
9718      shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
9719      shouldKeepComment: options.comments,
9720      outputSourceRange: options.outputSourceRange,
9721      start: function start (tag, attrs, unary, start$1, end) {
9722        // check namespace.
9723        // inherit parent ns if there is one
9724        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
9725
9726        // handle IE svg bug
9727        /* istanbul ignore if */
9728        if (isIE && ns === 'svg') {
9729          attrs = guardIESVGBug(attrs);
9730        }
9731
9732        var element = createASTElement(tag, attrs, currentParent);
9733        if (ns) {
9734          element.ns = ns;
9735        }
9736
9737        {
9738          if (options.outputSourceRange) {
9739            element.start = start$1;
9740            element.end = end;
9741            element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
9742              cumulated[attr.name] = attr;
9743              return cumulated
9744            }, {});
9745          }

9746          attrs.forEach(function (attr) {
9747            if (invalidAttributeRE.test(attr.name)) {
9748              warn$2(
9749                "Invalid dynamic argument expression: attribute names cannot contain " +
9750                "spaces, quotes, <, >, / or =.",
9751                {
9752                  start: attr.start + attr.name.indexOf("["),
9753                  end: attr.start + attr.name.length
9754                }
9755              );
9756            }
9757          });
9758        }
9759
9760        if (isForbiddenTag(element) && !isServerRendering()) {
9761          element.forbidden = true;
9762          warn$2(
9763            'Templates should only be responsible for mapping the state to the ' +
9764            'UI. Avoid placing tags with side-effects in your templates, such as ' +
9765            "<" + tag + ">" + ', as they will not be parsed.',
9766            { start: element.start }
9767          );
9768        }
9769
9770        // apply pre-transforms
9771        for (var i = 0; i < preTransforms.length; i++) {
9772          element = preTransforms[i](element, options) || element;
9773        }
9774
9775        if (!inVPre) {
9776          processPre(element);
9777          if (element.pre) {
9778            inVPre = true;
9779          }
9780        }
9781        if (platformIsPreTag(element.tag)) {
9782          inPre = true;
9783        }
9784        if (inVPre) {
9785          processRawAttrs(element);
9786        } else if (!element.processed) {
9787          // structural directives
9788          processFor(element);
9789          processIf(element);
9790          processOnce(element);
9791        }
9792
9793        if (!root) {
9794          root = element;
9795          {
9796            checkRootConstraints(root);
9797          }
9798        }
9799
9800        if (!unary) {
9801          currentParent = element;
9802          stack.push(element);
9803        } else {
9804          closeElement(element);
9805        }
9806      },
9807
9808      end: function end (tag, start, end$1) {
9809        var element = stack[stack.length - 1];
9810        // pop stack
9811        stack.length -= 1;
9812        currentParent = stack[stack.length - 1];
9813        if (options.outputSourceRange) {
9814          element.end = end$1;
9815        }
9816        closeElement(element);
9817      },
9818
9819      chars: function chars (text, start, end) {
9820        if (!currentParent) {
9821          {
9822            if (text === template) {
9823              warnOnce(
9824                'Component template requires a root element, rather than just text.',
9825                { start: start }
9826              );
9827            } else if ((text = text.trim())) {
9828              warnOnce(
9829                ("text \"" + text + "\" outside root element will be ignored."),
9830                { start: start }
9831              );
9832            }
9833          }
9834          return
9835        }
9836        // IE textarea placeholder bug
9837        /* istanbul ignore if */
9838        if (isIE &&
9839          currentParent.tag === 'textarea' &&
9840          currentParent.attrsMap.placeholder === text
9841        ) {
9842          return
9843        }
9844        var children = currentParent.children;
9845        if (inPre || text.trim()) {
9846          text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
9847        } else if (!children.length) {
9848          // remove the whitespace-only node right after an opening tag
9849          text = '';
9850        } else if (whitespaceOption) {
9851          if (whitespaceOption === 'condense') {
9852            // in condense mode, remove the whitespace node if it contains
9853            // line break, otherwise condense to a single space
9854            text = lineBreakRE.test(text) ? '' : ' ';
9855          } else {
9856            text = ' ';
9857          }
9858        } else {
9859          text = preserveWhitespace ? ' ' : '';
9860        }
9861        if (text) {
9862          if (!inPre && whitespaceOption === 'condense') {
9863            // condense consecutive whitespaces into single space
9864            text = text.replace(whitespaceRE$1, ' ');
9865          }
9866          var res;
9867          var child;
9868          if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
9869            child = {
9870              type: 2,
9871              expression: res.expression,
9872              tokens: res.tokens,
9873              text: text
9874            };
9875          } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
9876            child = {
9877              type: 3,
9878              text: text
9879            };
9880          }
9881          if (child) {
9882            if (options.outputSourceRange) {
9883              child.start = start;
9884              child.end = end;
9885            }
9886            children.push(child);
9887          }
9888        }
9889      },
9890      comment: function comment (text, start, end) {
9891        // adding anyting as a sibling to the root node is forbidden
9892        // comments should still be allowed, but ignored
9893        if (currentParent) {
9894          var child = {
9895            type: 3,
9896            text: text,
9897            isComment: true
9898          };
9899          if (options.outputSourceRange) {
9900            child.start = start;
9901            child.end = end;
9902          }
9903          currentParent.children.push(child);
9904        }
9905      }
9906    });
9907    return root
9908  }
9909
9910  function processPre (el) {
9911    if (getAndRemoveAttr(el, 'v-pre') != null) {
9912      el.pre = true;
9913    }
9914  }
9915
9916  function processRawAttrs (el) {
9917    var list = el.attrsList;
9918    var len = list.length;
9919    if (len) {
9920      var attrs = el.attrs = new Array(len);
9921      for (var i = 0; i < len; i++) {
9922        attrs[i] = {
9923          name: list[i].name,
9924          value: JSON.stringify(list[i].value)
9925        };
9926        if (list[i].start != null) {
9927          attrs[i].start = list[i].start;
9928          attrs[i].end = list[i].end;
9929        }
9930      }
9931    } else if (!el.pre) {

9932      // non root node in pre blocks with no attributes
9933      el.plain = true;
9934    }
9935  }
9936
9937  function processElement (
9938    element,
9939    options
9940  ) {
9941    processKey(element);
9942
9943    // determine whether this is a plain element after
9944    // removing structural attributes
9945    element.plain = (
9946      !element.key &&
9947      !element.scopedSlots &&
9948      !element.attrsList.length
9949    );
9950
9951    processRef(element);
9952    processSlotContent(element);
9953    processSlotOutlet(element);
9954    processComponent(element);
9955    for (var i = 0; i < transforms.length; i++) {
9956      element = transforms[i](element, options) || element;
9957    }
9958    processAttrs(element);
9959    return element
9960  }
9961
9962  function processKey (el) {
9963    var exp = getBindingAttr(el, 'key');
9964    if (exp) {
9965      {
9966        if (el.tag === 'template') {
9967          warn$2(
9968            "<template> cannot be keyed. Place the key on real elements instead.",
9969            getRawBindingAttr(el, 'key')
9970          );
9971        }
9972        if (el.for) {
9973          var iterator = el.iterator2 || el.iterator1;
9974          var parent = el.parent;
9975          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
9976            warn$2(
9977              "Do not use v-for index as key on <transition-group> children, " +
9978              "this is the same as not using keys.",
9979              getRawBindingAttr(el, 'key'),
9980              true /* tip */
9981            );
9982          }
9983        }
9984      }
9985      el.key = exp;
9986    }
9987  }
9988
9989  function processRef (el) {
9990    var ref = getBindingAttr(el, 'ref');
9991    if (ref) {
9992      el.ref = ref;
9993      el.refInFor = checkInFor(el);
9994    }
9995  }
9996
9997  function processFor (el) {
9998    var exp;
9999    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
10000      var res = parseFor(exp);
10001      if (res) {
10002        extend(el, res);
10003      } else {
10004        warn$2(
10005          ("Invalid v-for expression: " + exp),
10006          el.rawAttrsMap['v-for']
10007        );
10008      }
10009    }
10010  }
10011
10012
10013
10014  function parseFor (exp) {
10015    var inMatch = exp.match(forAliasRE);
10016    if (!inMatch) { return }
10017    var res = {};
10018    res.for = inMatch[2].trim();
10019    var alias = inMatch[1].trim().replace(stripParensRE, '');
10020    var iteratorMatch = alias.match(forIteratorRE);
10021    if (iteratorMatch) {
10022      res.alias = alias.replace(forIteratorRE, '').trim();
10023      res.iterator1 = iteratorMatch[1].trim();
10024      if (iteratorMatch[2]) {
10025        res.iterator2 = iteratorMatch[2].trim();
10026      }
10027    } else {
10028      res.alias = alias;
10029    }
10030    return res
10031  }
10032
10033  function processIf (el) {
10034    var exp = getAndRemoveAttr(el, 'v-if');
10035    if (exp) {
10036      el.if = exp;
10037      addIfCondition(el, {
10038        exp: exp,
10039        block: el
10040      });
10041    } else {
10042      if (getAndRemoveAttr(el, 'v-else') != null) {
10043        el.else = true;
10044      }
10045      var elseif = getAndRemoveAttr(el, 'v-else-if');
10046      if (elseif) {
10047        el.elseif = elseif;
10048      }
10049    }
10050  }
10051
10052  function processIfConditions (el, parent) {
10053    var prev = findPrevElement(parent.children);
10054    if (prev && prev.if) {
10055      addIfCondition(prev, {
10056        exp: el.elseif,
10057        block: el
10058      });
10059    } else {
10060      warn$2(
10061        "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
10062        "used on element <" + (el.tag) + "> without corresponding v-if.",
10063        el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
10064      );
10065    }
10066  }
10067
10068  function findPrevElement (children) {
10069    var i = children.length;
10070    while (i--) {
10071      if (children[i].type === 1) {
10072        return children[i]
10073      } else {
10074        if (children[i].text !== ' ') {
10075          warn$2(
10076            "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
10077            "will be ignored.",
10078            children[i]
10079          );
10080        }
10081        children.pop();
10082      }
10083    }
10084  }
10085
10086  function addIfCondition (el, condition) {
10087    if (!el.ifConditions) {
10088      el.ifConditions = [];
10089    }
10090    el.ifConditions.push(condition);
10091  }
10092
10093  function processOnce (el) {
10094    var once$$1 = getAndRemoveAttr(el, 'v-once');
10095    if (once$$1 != null) {
10096      el.once = true;
10097    }
10098  }
10099
10100  // handle content being passed to a component as slot,

10101  // e.g. <template slot="xxx">, <div slot-scope="xxx">
10102  function processSlotContent (el) {
10103    var slotScope;
10104    if (el.tag === 'template') {
10105      slotScope = getAndRemoveAttr(el, 'scope');
10106      /* istanbul ignore if */
10107      if (slotScope) {
10108        warn$2(
10109          "the \"scope\" attribute for scoped slots have been deprecated and " +
10110          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
10111          "can also be used on plain elements in addition to <template> to " +
10112          "denote scoped slots.",
10113          el.rawAttrsMap['scope'],
10114          true
10115        );
10116      }
10117      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
10118    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
10119      /* istanbul ignore if */
10120      if (el.attrsMap['v-for']) {
10121        warn$2(
10122          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
10123          "(v-for takes higher priority). Use a wrapper <template> for the " +
10124          "scoped slot to make it clearer.",
10125          el.rawAttrsMap['slot-scope'],
10126          true
10127        );
10128      }
10129      el.slotScope = slotScope;
10130    }
10131
10132    // slot="xxx"
10133    var slotTarget = getBindingAttr(el, 'slot');
10134    if (slotTarget) {
10135      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
10136      el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
10137      // preserve slot as an attribute for native shadow DOM compat
10138      // only for non-scoped slots.
10139      if (el.tag !== 'template' && !el.slotScope) {
10140        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
10141      }
10142    }
10143
10144    // 2.6 v-slot syntax
10145    {
10146      if (el.tag === 'template') {
10147        // v-slot on <template>
10148        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
10149        if (slotBinding) {
10150          {
10151            if (el.slotTarget || el.slotScope) {
10152              warn$2(
10153                "Unexpected mixed usage of different slot syntaxes.",
10154                el
10155              );
10156            }
10157            if (el.parent && !maybeComponent(el.parent)) {
10158              warn$2(
10159                "<template v-slot> can only appear at the root level inside " +
10160                "the receiving the component",
10161                el
10162              );
10163            }
10164          }
10165          var ref = getSlotName(slotBinding);
10166          var name = ref.name;
10167          var dynamic = ref.dynamic;
10168          el.slotTarget = name;
10169          el.slotTargetDynamic = dynamic;
10170          el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
10171        }
10172      } else {
10173        // v-slot on component, denotes default slot
10174        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
10175        if (slotBinding$1) {
10176          {
10177            if (!maybeComponent(el)) {
10178              warn$2(
10179                "v-slot can only be used on components or <template>.",
10180                slotBinding$1
10181              );
10182            }
10183            if (el.slotScope || el.slotTarget) {
10184              warn$2(
10185                "Unexpected mixed usage of different slot syntaxes.",
10186                el
10187              );
10188            }
10189            if (el.scopedSlots) {
10190              warn$2(
10191                "To avoid scope ambiguity, the default slot should also use " +
10192                "<template> syntax when there are other named slots.",
10193                slotBinding$1
10194              );
10195            }
10196          }
10197          // add the component's children to its default slot
10198          var slots = el.scopedSlots || (el.scopedSlots = {});
10199          var ref$1 = getSlotName(slotBinding$1);
10200          var name$1 = ref$1.name;
10201          var dynamic$1 = ref$1.dynamic;
10202          var slotContainer = slots[name$1] = createASTElement('template', [], el);
10203          slotContainer.slotTarget = name$1;
10204          slotContainer.slotTargetDynamic = dynamic$1;
10205          slotContainer.children = el.children.filter(function (c) {
10206            if (!c.slotScope) {
10207              c.parent = slotContainer;
10208              return true
10209            }
10210          });
10211          slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
10212          // remove children as they are returned from scopedSlots now
10213          el.children = [];
10214          // mark el non-plain so data gets generated
10215          el.plain = false;

10216        }
10217      }
10218    }
10219  }
10220
10221  function getSlotName (binding) {
10222    var name = binding.name.replace(slotRE, '');
10223    if (!name) {
10224      if (binding.name[0] !== '#') {
10225        name = 'default';
10226      } else {
10227        warn$2(
10228          "v-slot shorthand syntax requires a slot name.",
10229          binding
10230        );
10231      }
10232    }
10233    return dynamicArgRE.test(name)
10234      // dynamic [name]
10235      ? { name: name.slice(1, -1), dynamic: true }
10236      // static name
10237      : { name: ("\"" + name + "\""), dynamic: false }
10238  }
10239
10240  // handle <slot/> outlets
10241  function processSlotOutlet (el) {
10242    if (el.tag === 'slot') {
10243      el.slotName = getBindingAttr(el, 'name');
10244      if (el.key) {
10245        warn$2(
10246          "`key` does not work on <slot> because slots are abstract outlets " +
10247          "and can possibly expand into multiple elements. " +
10248          "Use the key on a wrapping element instead.",
10249          getRawBindingAttr(el, 'key')
10250        );
10251      }
10252    }
10253  }
10254
10255  function processComponent (el) {
10256    var binding;
10257    if ((binding = getBindingAttr(el, 'is'))) {
10258      el.component = binding;
10259    }
10260    if (getAndRemoveAttr(el, 'inline-template') != null) {
10261      el.inlineTemplate = true;
10262    }
10263  }
10264
10265  function processAttrs (el) {
10266    var list = el.attrsList;
10267    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
10268    for (i = 0, l = list.length; i < l; i++) {
10269      name = rawName = list[i].name;
10270      value = list[i].value;
10271      if (dirRE.test(name)) {
10272        // mark element as dynamic
10273        el.hasBindings = true;
10274        // modifiers
10275        modifiers = parseModifiers(name.replace(dirRE, ''));
10276        // support .foo shorthand syntax for the .prop modifier
10277        if (modifiers) {
10278          name = name.replace(modifierRE, '');
10279        }
10280        if (bindRE.test(name)) { // v-bind
10281          name = name.replace(bindRE, '');
10282          value = parseFilters(value);
10283          isDynamic = dynamicArgRE.test(name);
10284          if (isDynamic) {
10285            name = name.slice(1, -1);
10286          }
10287          if (
10288            value.trim().length === 0
10289          ) {
10290            warn$2(
10291              ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
10292            );
10293          }
10294          if (modifiers) {
10295            if (modifiers.prop && !isDynamic) {
10296              name = camelize(name);
10297              if (name === 'innerHtml') { name = 'innerHTML'; }
10298            }
10299            if (modifiers.camel && !isDynamic) {
10300              name = camelize(name);
10301            }
10302            if (modifiers.sync) {
10303              syncGen = genAssignmentCode(value, "$event");
10304              if (!isDynamic) {
10305                addHandler(
10306                  el,
10307                  ("update:" + (camelize(name))),
10308                  syncGen,
10309                  null,
10310                  false,
10311                  warn$2,
10312                  list[i]
10313                );
10314                if (hyphenate(name) !== camelize(name)) {
10315                  addHandler(
10316                    el,
10317                    ("update:" + (hyphenate(name))),
10318                    syncGen,
10319                    null,
10320                    false,
10321                    warn$2,
10322                    list[i]
10323                  );
10324                }
10325              } else {
10326                // handler w/ dynamic event name
10327                addHandler(
10328                  el,
10329                  ("\"update:\"+(" + name + ")"),
10330                  syncGen,
10331                  null,
10332                  false,
10333                  warn$2,
10334                  list[i],
10335                  true // dynamic
10336                );
10337              }
10338            }
10339          }
10340          if ((modifiers && modifiers.prop) || (
10341            !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
10342          )) {
10343            addProp(el, name, value, list[i], isDynamic);
10344          } else {
10345            addAttr(el, name, value, list[i], isDynamic);
10346          }
10347        } else if (onRE.test(name)) { // v-on
10348          name = name.replace(onRE, '');
10349          isDynamic = dynamicArgRE.test(name);
10350          if (isDynamic) {
10351            name = name.slice(1, -1);
10352          }
10353          addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
10354        } else { // normal directives
10355          name = name.replace(dirRE, '');
10356          // parse arg
10357          var argMatch = name.match(argRE);
10358          var arg = argMatch && argMatch[1];
10359          isDynamic = false;

10360          if (arg) {
10361            name = name.slice(0, -(arg.length + 1));
10362            if (dynamicArgRE.test(arg)) {
10363              arg = arg.slice(1, -1);
10364              isDynamic = true;
10365            }
10366          }
10367          addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
10368          if (name === 'model') {
10369            checkForAliasModel(el, value);
10370          }
10371        }
10372      } else {
10373        // literal attribute
10374        {
10375          var res = parseText(value, delimiters);
10376          if (res) {
10377            warn$2(
10378              name + "=\"" + value + "\": " +
10379              'Interpolation inside attributes has been removed. ' +
10380              'Use v-bind or the colon shorthand instead. For example, ' +
10381              'instead of <div id="{{ val }}">, use <div :id="val">.',
10382              list[i]
10383            );
10384          }
10385        }
10386        addAttr(el, name, JSON.stringify(value), list[i]);
10387        // #6887 firefox doesn't update muted state if set via attribute
10388        // even immediately after element creation
10389        if (!el.component &&
10390            name === 'muted' &&
10391            platformMustUseProp(el.tag, el.attrsMap.type, name)) {
10392          addProp(el, name, 'true', list[i]);
10393        }
10394      }
10395    }
10396  }
10397
10398  function checkInFor (el) {
10399    var parent = el;
10400    while (parent) {
10401      if (parent.for !== undefined) {
10402        return true
10403      }
10404      parent = parent.parent;
10405    }
10406    return false
10407  }
10408
10409  function parseModifiers (name) {
10410    var match = name.match(modifierRE);
10411    if (match) {
10412      var ret = {};
10413      match.forEach(function (m) { ret[m.slice(1)] = true; });
10414      return ret
10415    }
10416  }
10417
10418  function makeAttrsMap (attrs) {
10419    var map = {};
10420    for (var i = 0, l = attrs.length; i < l; i++) {
10421      if (
10422        map[attrs[i].name] && !isIE && !isEdge
10423      ) {
10424        warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
10425      }
10426      map[attrs[i].name] = attrs[i].value;
10427    }
10428    return map
10429  }
10430
10431  // for script (e.g. type="x/template") or style, do not decode content
10432  function isTextTag (el) {
10433    return el.tag === 'script' || el.tag === 'style'
10434  }
10435
10436  function isForbiddenTag (el) {
10437    return (
10438      el.tag === 'style' ||
10439      (el.tag === 'script' && (
10440        !el.attrsMap.type ||
10441        el.attrsMap.type === 'text/javascript'
10442      ))
10443    )
10444  }
10445
10446  var ieNSBug = /^xmlns:NS\d+/;
10447  var ieNSPrefix = /^NS\d+:/;
10448
10449  /* istanbul ignore next */
10450  function guardIESVGBug (attrs) {
10451    var res = [];
10452    for (var i = 0; i < attrs.length; i++) {
10453      var attr = attrs[i];
10454      if (!ieNSBug.test(attr.name)) {
10455        attr.name = attr.name.replace(ieNSPrefix, '');
10456        res.push(attr);
10457      }
10458    }
10459    return res
10460  }
10461
10462  function checkForAliasModel (el, value) {
10463    var _el = el;
10464    while (_el) {
10465      if (_el.for && _el.alias === value) {
10466        warn$2(
10467          "<" + (el.tag) + " v-model=\"" + value + "\">: " +
10468          "You are binding v-model directly to a v-for iteration alias. " +
10469          "This will not be able to modify the v-for source array because " +
10470          "writing to the alias is like modifying a function local variable. " +
10471          "Consider using an array of objects and use v-model on an object property instead.",
10472          el.rawAttrsMap['v-model']
10473        );
10474      }
10475      _el = _el.parent;
10476    }
10477  }
10478
10479  /*  */
10480
10481  function preTransformNode (el, options) {
10482    if (el.tag === 'input') {
10483      var map = el.attrsMap;
10484      if (!map['v-model']) {
10485        return
10486      }
10487
10488      var typeBinding;
10489      if (map[':type'] || map['v-bind:type']) {
10490        typeBinding = getBindingAttr(el, 'type');
10491      }
10492      if (!map.type && !typeBinding && map['v-bind']) {
10493        typeBinding = "(" + (map['v-bind']) + ").type";
10494      }
10495
10496      if (typeBinding) {
10497        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
10498        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
10499        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
10500        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
10501        // 1. checkbox
10502        var branch0 = cloneASTElement(el);
10503        // process for on the main node
10504        processFor(branch0);
10505        addRawAttr(branch0, 'type', 'checkbox');
10506        processElement(branch0, options);
10507        branch0.processed = true; // prevent it from double-processed
10508        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
10509        addIfCondition(branch0, {
10510          exp: branch0.if,
10511          block: branch0
10512        });
10513        // 2. add radio else-if condition
10514        var branch1 = cloneASTElement(el);
10515        getAndRemoveAttr(branch1, 'v-for', true);
10516        addRawAttr(branch1, 'type', 'radio');
10517        processElement(branch1, options);
10518        addIfCondition(branch0, {
10519          exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
10520          block: branch1
10521        });
10522        // 3. other
10523        var branch2 = cloneASTElement(el);
10524        getAndRemoveAttr(branch2, 'v-for', true);
10525        addRawAttr(branch2, ':type', typeBinding);
10526        processElement(branch2, options);
10527        addIfCondition(branch0, {
10528          exp: ifCondition,
10529          block: branch2
10530        });
10531
10532        if (hasElse) {
10533          branch0.else = true;
10534        } else if (elseIfCondition) {
10535          branch0.elseif = elseIfCondition;
10536        }
10537
10538        return branch0
10539      }
10540    }
10541  }
10542
10543  function cloneASTElement (el) {
10544    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
10545  }
10546
10547  var model$1 = {
10548    preTransformNode: preTransformNode
10549  };
10550
10551  var modules$1 = [
10552    klass$1,
10553    style$1,
10554    model$1
10555  ];
10556
10557  /*  */
10558
10559  function text (el, dir) {
10560    if (dir.value) {
10561      addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
10562    }
10563  }
10564
10565  /*  */
10566
10567  function html (el, dir) {
10568    if (dir.value) {
10569      addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
10570    }
10571  }
10572
10573  var directives$1 = {
10574    model: model,
10575    text: text,
10576    html: html
10577  };
10578
10579  /*  */
10580
10581  var baseOptions = {
10582    expectHTML: true,
10583    modules: modules$1,
10584    directives: directives$1,
10585    isPreTag: isPreTag,
10586    isUnaryTag: isUnaryTag,
10587    mustUseProp: mustUseProp,
10588    canBeLeftOpenTag: canBeLeftOpenTag,
10589    isReservedTag: isReservedTag,
10590    getTagNamespace: getTagNamespace,
10591    staticKeys: genStaticKeys(modules$1)
10592  };
10593
10594  /*  */
10595
10596  var isStaticKey;
10597  var isPlatformReservedTag;
10598

10599  var genStaticKeysCached = cached(genStaticKeys$1);
10600
10601  /**
10602   * Goal of the optimizer: walk the generated template AST tree
10603   * and detect sub-trees that are purely static, i.e. parts of
10604   * the DOM that never needs to change.
10605   *
10606   * Once we detect these sub-trees, we can:
10607   *
10608   * 1. Hoist them into constants, so that we no longer need to
10609   *    create fresh nodes for them on each re-render;
10610   * 2. Completely skip them in the patching process.
10611   */
10612  function optimize (root, options) {
10613    if (!root) { return }
10614    isStaticKey = genStaticKeysCached(options.staticKeys || '');
10615    isPlatformReservedTag = options.isReservedTag || no;
10616    // first pass: mark all non-static nodes.
10617    markStatic$1(root);
10618    // second pass: mark static roots.
10619    markStaticRoots(root, false);
10620  }
10621
10622  function genStaticKeys$1 (keys) {
10623    return makeMap(
10624      'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
10625      (keys ? ',' + keys : '')
10626    )
10627  }
10628
10629  function markStatic$1 (node) {
10630    node.static = isStatic(node);
10631    if (node.type === 1) {
10632      // do not make component slot content static. this avoids
10633      // 1. components not able to mutate slot nodes
10634      // 2. static slot content fails for hot-reloading
10635      if (
10636        !isPlatformReservedTag(node.tag) &&
10637        node.tag !== 'slot' &&
10638        node.attrsMap['inline-template'] == null
10639      ) {
10640        return
10641      }
10642      for (var i = 0, l = node.children.length; i < l; i++) {
10643        var child = node.children[i];
10644        markStatic$1(child);
10645        if (!child.static) {
10646          node.static = false;
10647        }
10648      }
10649      if (node.ifConditions) {
10650        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
10651          var block = node.ifConditions[i$1].block;
10652          markStatic$1(block);
10653          if (!block.static) {
10654            node.static = false;
10655          }
10656        }
10657      }
10658    }
10659  }
10660
10661  function markStaticRoots (node, isInFor) {
10662    if (node.type === 1) {
10663      if (node.static || node.once) {
10664        node.staticInFor = isInFor;
10665      }
10666      // For a node to qualify as a static root, it should have children that
10667      // are not just static text. Otherwise the cost of hoisting out will
10668      // outweigh the benefits and it's better off to just always render it fresh.
10669      if (node.static && node.children.length && !(
10670        node.children.length === 1 &&
10671        node.children[0].type === 3
10672      )) {
10673        node.staticRoot = true;
10674        return
10675      } else {
10676        node.staticRoot = false;
10677      }
10678      if (node.children) {
10679        for (var i = 0, l = node.children.length; i < l; i++) {
10680          markStaticRoots(node.children[i], isInFor || !!node.for);
10681        }
10682      }
10683      if (node.ifConditions) {
10684        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
10685          markStaticRoots(node.ifConditions[i$1].block, isInFor);
10686        }
10687      }
10688    }
10689  }
10690
10691  function isStatic (node) {
10692    if (node.type === 2) { // expression
10693      return false
10694    }
10695    if (node.type === 3) { // text
10696      return true
10697    }
10698    return !!(node.pre || (
10699      !node.hasBindings && // no dynamic bindings
10700      !node.if && !node.for && // not v-if or v-for or v-else
10701      !isBuiltInTag(node.tag) && // not a built-in
10702      isPlatformReservedTag(node.tag) && // not a component
10703      !isDirectChildOfTemplateFor(node) &&
10704      Object.keys(node).every(isStaticKey)
10705    ))
10706  }
10707
10708  function isDirectChildOfTemplateFor (node) {
10709    while (node.parent) {
10710      node = node.parent;
10711      if (node.tag !== 'template') {
10712        return false
10713      }
10714      if (node.for) {
10715        return true
10716      }
10717    }
10718    return false
10719  }
10720
10721  /*  */
10722
10723  var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function\s*(?:[\w$]+)?\s*\(/;
10724  var fnInvokeRE = /\([^)]*?\);*$/;
10725  var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
10726
10727  // KeyboardEvent.keyCode aliases
10728  var keyCodes = {
10729    esc: 27,
10730    tab: 9,
10731    enter: 13,
10732    space: 32,
10733    up: 38,
10734    left: 37,
10735    right: 39,
10736    down: 40,
10737    'delete': [8, 46]
10738  };
10739
10740  // KeyboardEvent.key aliases
10741  var keyNames = {
10742    // #7880: IE11 and Edge use `Esc` for Escape key name.
10743    esc: ['Esc', 'Escape'],
10744    tab: 'Tab',
10745    enter: 'Enter',
10746    // #9112: IE11 uses `Spacebar` for Space key name.
10747    space: [' ', 'Spacebar'],
10748    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
10749    up: ['Up', 'ArrowUp'],
10750    left: ['Left', 'ArrowLeft'],
10751    right: ['Right', 'ArrowRight'],

10752    down: ['Down', 'ArrowDown'],
10753    // #9112: IE11 uses `Del` for Delete key name.
10754    'delete': ['Backspace', 'Delete', 'Del']
10755  };
10756
10757  // #4868: modifiers that prevent the execution of the listener
10758  // need to explicitly return null so that we can determine whether to remove
10759  // the listener for .once
10760  var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
10761
10762  var modifierCode = {
10763    stop: '$event.stopPropagation();',
10764    prevent: '$event.preventDefault();',
10765    self: genGuard("$event.target !== $event.currentTarget"),
10766    ctrl: genGuard("!$event.ctrlKey"),
10767    shift: genGuard("!$event.shiftKey"),
10768    alt: genGuard("!$event.altKey"),
10769    meta: genGuard("!$event.metaKey"),
10770    left: genGuard("'button' in $event && $event.button !== 0"),
10771    middle: genGuard("'button' in $event && $event.button !== 1"),
10772    right: genGuard("'button' in $event && $event.button !== 2")
10773  };
10774
10775  function genHandlers (
10776    events,
10777    isNative
10778  ) {
10779    var prefix = isNative ? 'nativeOn:' : 'on:';
10780    var staticHandlers = "";
10781    var dynamicHandlers = "";
10782    for (var name in events) {
10783      var handlerCode = genHandler(events[name]);
10784      if (events[name] && events[name].dynamic) {
10785        dynamicHandlers += name + "," + handlerCode + ",";
10786      } else {
10787        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
10788      }
10789    }
10790    staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
10791    if (dynamicHandlers) {
10792      return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
10793    } else {
10794      return prefix + staticHandlers
10795    }
10796  }
10797
10798  function genHandler (handler) {
10799    if (!handler) {
10800      return 'function(){}'
10801    }
10802
10803    if (Array.isArray(handler)) {
10804      return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
10805    }
10806
10807    var isMethodPath = simplePathRE.test(handler.value);
10808    var isFunctionExpression = fnExpRE.test(handler.value);
10809    var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
10810
10811    if (!handler.modifiers) {
10812      if (isMethodPath || isFunctionExpression) {
10813        return handler.value
10814      }
10815      return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
10816    } else {
10817      var code = '';
10818      var genModifierCode = '';
10819      var keys = [];
10820      for (var key in handler.modifiers) {
10821        if (modifierCode[key]) {
10822          genModifierCode += modifierCode[key];
10823          // left/right
10824          if (keyCodes[key]) {
10825            keys.push(key);
10826          }
10827        } else if (key === 'exact') {
10828          var modifiers = (handler.modifiers);
10829          genModifierCode += genGuard(
10830            ['ctrl', 'shift', 'alt', 'meta']
10831              .filter(function (keyModifier) { return !modifiers[keyModifier]; })
10832              .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
10833              .join('||')
10834          );
10835        } else {
10836          keys.push(key);
10837        }
10838      }
10839      if (keys.length) {
10840        code += genKeyFilter(keys);
10841      }
10842      // Make sure modifiers like prevent and stop get executed after key filtering
10843      if (genModifierCode) {
10844        code += genModifierCode;
10845      }
10846      var handlerCode = isMethodPath
10847        ? ("return " + (handler.value) + "($event)")
10848        : isFunctionExpression
10849          ? ("return (" + (handler.value) + ")($event)")
10850          : isFunctionInvocation
10851            ? ("return " + (handler.value))
10852            : handler.value;
10853      return ("function($event){" + code + handlerCode + "}")
10854    }
10855  }
10856
10857  function genKeyFilter (keys) {
10858    return (
10859      // make sure the key filters only apply to KeyboardEvents
10860      // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
10861      // key events that do not have keyCode property...
10862      "if(!$event.type.indexOf('key')&&" +
10863      (keys.map(genFilterCode).join('&&')) + ")return null;"
10864    )
10865  }
10866
10867  function genFilterCode (key) {
10868    var keyVal = parseInt(key, 10);
10869    if (keyVal) {
10870      return ("$event.keyCode!==" + keyVal)
10871    }
10872    var keyCode = keyCodes[key];
10873    var keyName = keyNames[key];
10874    return (
10875      "_k($event.keyCode," +
10876      (JSON.stringify(key)) + "," +
10877      (JSON.stringify(keyCode)) + "," +
10878      "$event.key," +
10879      "" + (JSON.stringify(keyName)) +
10880      ")"
10881    )
10882  }
10883
10884  /*  */
10885
10886  function on (el, dir) {
10887    if (dir.modifiers) {
10888      warn("v-on without argument does not support modifiers.");
10889    }
10890    el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
10891  }
10892
10893  /*  */
10894
10895  function bind$1 (el, dir) {
10896    el.wrapData = function (code) {
10897      return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
10898    };
10899  }
10900
10901  /*  */
10902
10903  var baseDirectives = {
10904    on: on,
10905    bind: bind$1,
10906    cloak: noop
10907  };
10908
10909  /*  */
10910
10911
10912
10913
10914
10915  var CodegenState = function CodegenState (options) {
10916    this.options = options;
10917    this.warn = options.warn || baseWarn;
10918    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
10919    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
10920    this.directives = extend(extend({}, baseDirectives), options.directives);
10921    var isReservedTag = options.isReservedTag || no;
10922    this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
10923    this.onceId = 0;
10924    this.staticRenderFns = [];
10925    this.pre = false;

10926  };
10927
10928
10929
10930  function generate (
10931    ast,
10932    options
10933  ) {
10934    var state = new CodegenState(options);
10935    var code = ast ? genElement(ast, state) : '_c("div")';
10936    return {
10937      render: ("with(this){return " + code + "}"),
10938      staticRenderFns: state.staticRenderFns
10939    }
10940  }
10941
10942  function genElement (el, state) {
10943    if (el.parent) {
10944      el.pre = el.pre || el.parent.pre;
10945    }
10946
10947    if (el.staticRoot && !el.staticProcessed) {
10948      return genStatic(el, state)
10949    } else if (el.once && !el.onceProcessed) {
10950      return genOnce(el, state)
10951    } else if (el.for && !el.forProcessed) {
10952      return genFor(el, state)
10953    } else if (el.if && !el.ifProcessed) {
10954      return genIf(el, state)
10955    } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
10956      return genChildren(el, state) || 'void 0'
10957    } else if (el.tag === 'slot') {
10958      return genSlot(el, state)
10959    } else {
10960      // component or element
10961      var code;
10962      if (el.component) {
10963        code = genComponent(el.component, el, state);
10964      } else {
10965        var data;
10966        if (!el.plain || (el.pre && state.maybeComponent(el))) {
10967          data = genData$2(el, state);
10968        }
10969
10970        var children = el.inlineTemplate ? null : genChildren(el, state, true);
10971        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
10972      }
10973      // module transforms
10974      for (var i = 0; i < state.transforms.length; i++) {
10975        code = state.transforms[i](el, code);
10976      }
10977      return code
10978    }
10979  }
10980
10981  // hoist static sub-trees out
10982  function genStatic (el, state) {
10983    el.staticProcessed = true;
10984    // Some elements (templates) need to behave differently inside of a v-pre
10985    // node.  All pre nodes are static roots, so we can use this as a location to
10986    // wrap a state change and reset it upon exiting the pre node.
10987    var originalPreState = state.pre;
10988    if (el.pre) {
10989      state.pre = el.pre;
10990    }
10991    state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
10992    state.pre = originalPreState;
10993    return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
10994  }
10995
10996  // v-once
10997  function genOnce (el, state) {
10998    el.onceProcessed = true;
10999    if (el.if && !el.ifProcessed) {
11000      return genIf(el, state)
11001    } else if (el.staticInFor) {
11002      var key = '';
11003      var parent = el.parent;
11004      while (parent) {
11005        if (parent.for) {
11006          key = parent.key;
11007          break
11008        }
11009        parent = parent.parent;
11010      }
11011      if (!key) {
11012        state.warn(
11013          "v-once can only be used inside v-for that is keyed. ",
11014          el.rawAttrsMap['v-once']
11015        );
11016        return genElement(el, state)
11017      }
11018      return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
11019    } else {
11020      return genStatic(el, state)
11021    }
11022  }
11023
11024  function genIf (
11025    el,
11026    state,
11027    altGen,
11028    altEmpty
11029  ) {
11030    el.ifProcessed = true; // avoid recursion
11031    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
11032  }
11033
11034  function genIfConditions (
11035    conditions,
11036    state,
11037    altGen,
11038    altEmpty
11039  ) {
11040    if (!conditions.length) {
11041      return altEmpty || '_e()'
11042    }
11043
11044    var condition = conditions.shift();
11045    if (condition.exp) {
11046      return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
11047    } else {
11048      return ("" + (genTernaryExp(condition.block)))
11049    }
11050
11051    // v-if with v-once should generate code like (a)?_m(0):_m(1)
11052    function genTernaryExp (el) {
11053      return altGen
11054        ? altGen(el, state)
11055        : el.once
11056          ? genOnce(el, state)
11057          : genElement(el, state)
11058    }
11059  }
11060
11061  function genFor (
11062    el,
11063    state,
11064    altGen,
11065    altHelper
11066  ) {
11067    var exp = el.for;
11068    var alias = el.alias;
11069    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
11070    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
11071
11072    if (state.maybeComponent(el) &&
11073      el.tag !== 'slot' &&
11074      el.tag !== 'template' &&
11075      !el.key
11076    ) {
11077      state.warn(
11078        "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
11079        "v-for should have explicit keys. " +
11080        "See https://vuejs.org/guide/list.html#key for more info.",
11081        el.rawAttrsMap['v-for'],
11082        true /* tip */
11083      );
11084    }
11085
11086    el.forProcessed = true; // avoid recursion
11087    return (altHelper || '_l') + "((" + exp + ")," +
11088      "function(" + alias + iterator1 + iterator2 + "){" +
11089        "return " + ((altGen || genElement)(el, state)) +
11090      '})'
11091  }
11092
11093  function genData$2 (el, state) {
11094    var data = '{';
11095
11096    // directives first.
11097    // directives may mutate the el's other properties before they are generated.
11098    var dirs = genDirectives(el, state);
11099    if (dirs) { data += dirs + ','; }
11100
11101    // key
11102    if (el.key) {
11103      data += "key:" + (el.key) + ",";
11104    }
11105    // ref
11106    if (el.ref) {
11107      data += "ref:" + (el.ref) + ",";
11108    }
11109    if (el.refInFor) {
11110      data += "refInFor:true,";
11111    }
11112    // pre
11113    if (el.pre) {
11114      data += "pre:true,";
11115    }
11116    // record original tag name for components using "is" attribute
11117    if (el.component) {
11118      data += "tag:\"" + (el.tag) + "\",";
11119    }
11120    // module data generation functions
11121    for (var i = 0; i < state.dataGenFns.length; i++) {
11122      data += state.dataGenFns[i](el);
11123    }
11124    // attributes
11125    if (el.attrs) {

11126      data += "attrs:" + (genProps(el.attrs)) + ",";
11127    }
11128    // DOM props
11129    if (el.props) {
11130      data += "domProps:" + (genProps(el.props)) + ",";
11131    }
11132    // event handlers
11133    if (el.events) {
11134      data += (genHandlers(el.events, false)) + ",";
11135    }
11136    if (el.nativeEvents) {
11137      data += (genHandlers(el.nativeEvents, true)) + ",";
11138    }
11139    // slot target
11140    // only for non-scoped slots
11141    if (el.slotTarget && !el.slotScope) {
11142      data += "slot:" + (el.slotTarget) + ",";
11143    }
11144    // scoped slots
11145    if (el.scopedSlots) {
11146      data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
11147    }
11148    // component v-model
11149    if (el.model) {
11150      data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
11151    }
11152    // inline-template
11153    if (el.inlineTemplate) {
11154      var inlineTemplate = genInlineTemplate(el, state);
11155      if (inlineTemplate) {
11156        data += inlineTemplate + ",";
11157      }
11158    }
11159    data = data.replace(/,$/, '') + '}';
11160    // v-bind dynamic argument wrap
11161    // v-bind with dynamic arguments must be applied using the same v-bind object
11162    // merge helper so that class/style/mustUseProp attrs are handled correctly.
11163    if (el.dynamicAttrs) {
11164      data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
11165    }
11166    // v-bind data wrap
11167    if (el.wrapData) {
11168      data = el.wrapData(data);
11169    }
11170    // v-on data wrap
11171    if (el.wrapListeners) {
11172      data = el.wrapListeners(data);
11173    }
11174    return data
11175  }
11176
11177  function genDirectives (el, state) {
11178    var dirs = el.directives;
11179    if (!dirs) { return }
11180    var res = 'directives:[';
11181    var hasRuntime = false;
11182    var i, l, dir, needRuntime;
11183    for (i = 0, l = dirs.length; i < l; i++) {
11184      dir = dirs[i];
11185      needRuntime = true;
11186      var gen = state.directives[dir.name];
11187      if (gen) {
11188        // compile-time directive that manipulates AST.
11189        // returns true if it also needs a runtime counterpart.
11190        needRuntime = !!gen(el, dir, state.warn);
11191      }
11192      if (needRuntime) {
11193        hasRuntime = true;
11194        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))) : '') + "},";
11195      }
11196    }
11197    if (hasRuntime) {
11198      return res.slice(0, -1) + ']'
11199    }
11200  }
11201
11202  function genInlineTemplate (el, state) {
11203    var ast = el.children[0];
11204    if (el.children.length !== 1 || ast.type !== 1) {
11205      state.warn(
11206        'Inline-template components must have exactly one child element.',
11207        { start: el.start }
11208      );
11209    }
11210    if (ast && ast.type === 1) {
11211      var inlineRenderFns = generate(ast, state.options);
11212      return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
11213    }
11214  }
11215
11216  function genScopedSlots (
11217    el,
11218    slots,
11219    state
11220  ) {
11221    // by default scoped slots are considered "stable", this allows child
11222    // components with only scoped slots to skip forced updates from parent.
11223    // but in some cases we have to bail-out of this optimization
11224    // for example if the slot contains dynamic names, has v-if or v-for on them...
11225    var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
11226      var slot = slots[key];
11227      return (
11228        slot.slotTargetDynamic ||
11229        slot.if ||
11230        slot.for ||
11231        containsSlotChild(slot) // is passing down slot from parent which may be dynamic
11232      )
11233    });
11234
11235    // #9534: if a component with scoped slots is inside a conditional branch,
11236    // it's possible for the same component to be reused but with different
11237    // compiled slot content. To avoid that, we generate a unique key based on
11238    // the generated code of all the slot contents.
11239    var needsKey = !!el.if;
11240
11241    // OR when it is inside another scoped slot or v-for (the reactivity may be
11242    // disconnected due to the intermediate scope variable)
11243    // #9438, #9506
11244    // TODO: this can be further optimized by properly analyzing in-scope bindings
11245    // and skip force updating ones that do not actually use scope variables.
11246    if (!needsForceUpdate) {
11247      var parent = el.parent;
11248      while (parent) {
11249        if (
11250          (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
11251          parent.for
11252        ) {
11253          needsForceUpdate = true;
11254          break
11255        }
11256        if (parent.if) {
11257          needsKey = true;
11258        }
11259        parent = parent.parent;
11260      }
11261    }
11262
11263    var generatedSlots = Object.keys(slots)
11264      .map(function (key) { return genScopedSlot(slots[key], state); })
11265      .join(',');
11266
11267    return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,fal

11267se," + (hash(generatedSlots))) : "") + ")")
11268  }
11269
11270  function hash(str) {
11271    var hash = 5381;
11272    var i = str.length;
11273    while(i) {
11274      hash = (hash * 33) ^ str.charCodeAt(--i);
11275    }
11276    return hash >>> 0
11277  }
11278
11279  function containsSlotChild (el) {
11280    if (el.type === 1) {
11281      if (el.tag === 'slot') {
11282        return true
11283      }
11284      return el.children.some(containsSlotChild)
11285    }
11286    return false
11287  }
11288
11289  function genScopedSlot (
11290    el,
11291    state
11292  ) {
11293    var isLegacySyntax = el.attrsMap['slot-scope'];
11294    if (el.if && !el.ifProcessed && !isLegacySyntax) {
11295      return genIf(el, state, genScopedSlot, "null")
11296    }
11297    if (el.for && !el.forProcessed) {
11298      return genFor(el, state, genScopedSlot)
11299    }
11300    var slotScope = el.slotScope === emptySlotScopeToken
11301      ? ""
11302      : String(el.slotScope);
11303    var fn = "function(" + slotScope + "){" +
11304      "return " + (el.tag === 'template'
11305        ? el.if && isLegacySyntax
11306          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
11307          : genChildren(el, state) || 'undefined'
11308        : genElement(el, state)) + "}";
11309    // reverse proxy v-slot without scope on this.$slots
11310    var reverseProxy = slotScope ? "" : ",proxy:true";
11311    return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
11312  }
11313
11314  function genChildren (
11315    el,
11316    state,
11317    checkSkip,
11318    altGenElement,
11319    altGenNode
11320  ) {
11321    var children = el.children;
11322    if (children.length) {
11323      var el$1 = children[0];
11324      // optimize single v-for
11325      if (children.length === 1 &&
11326        el$1.for &&
11327        el$1.tag !== 'template' &&
11328        el$1.tag !== 'slot'
11329      ) {
11330        var normalizationType = checkSkip
11331          ? state.maybeComponent(el$1) ? ",1" : ",0"
11332          : "";
11333        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
11334      }
11335      var normalizationType$1 = checkSkip
11336        ? getNormalizationType(children, state.maybeComponent)
11337        : 0;
11338      var gen = altGenNode || genNode;
11339      return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
11340    }
11341  }
11342
11343  // determine the normalization needed for the children array.
11344  // 0: no normalization needed
11345  // 1: simple normalization needed (possible 1-level deep nested array)
11346  // 2: full normalization needed
11347  function getNormalizationType (
11348    children,
11349    maybeComponent
11350  ) {
11351    var res = 0;
11352    for (var i = 0; i < children.length; i++) {
11353      var el = children[i];
11354      if (el.type !== 1) {
11355        continue
11356      }
11357      if (needsNormalization(el) ||
11358          (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
11359        res = 2;
11360        break
11361      }
11362      if (maybeComponent(el) ||
11363          (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
11364        res = 1;
11365      }
11366    }
11367    return res
11368  }
11369
11370  function needsNormalization (el) {
11371    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
11372  }
11373
11374  function genNode (node, state) {
11375    if (node.type === 1) {
11376      return genElement(node, state)
11377    } else if (node.type === 3 && node.isComment) {
11378      return genComment(node)
11379    } else {
11380      return genText(node)
11381    }
11382  }
11383
11384  function genText (text) {
11385    return ("_v(" + (text.type === 2
11386      ? text.expression // no need for () because already wrapped in _s()
11387      : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
11388  }
11389
11390  function genComment (comment) {
11391    return ("_e(" + (JSON.stringify(comment.text)) + ")")
11392  }
11393
11394  function genSlot (el, state) {
11395    var slotName = el.slotName || '"default"';
11396    var children = genChildren(el, state);
11397    var res = "_t(" + slotName + (children ? ("," + children) : '');
11398    var attrs = el.attrs || el.dynamicAttrs
11399      ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
11400          // slot props are camelized
11401          name: camelize(attr.name),
11402          value: attr.value,
11403          dynamic: attr.dynamic
11404        }); }))
11405      : null;
11406    var bind$$1 = el.attrsMap['v-bind'];
11407    if ((attrs || bind$$1) && !children) {
11408      res += ",null";
11409    }
11410    if (attrs) {
11411      res += "," + attrs;
11412    }
11413    if (bind$$1) {
11414      res += (attrs ? '' : ',null') + "," + bind$$1;
11415    }
11416    return res + ')'
11417  }
11418
11419  // componentName is el.component, take it as argument to shun flow's pessimistic refinement
11420  function genComponent (
11421    componentName,
11422    el,
11423    state
11424  ) {
11425    var children = el.inlineTemplate ? null : genChildren(el, state, true);
11426    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
11427  }
11428
11429  function genProps (props) {
11430    var staticProps = "";
11431    var dynamicProps = "";
11432    for (var i = 0; i < props.length; i++) {
11433      var prop = props[i];
11434      var value = transformSpecialNewlines(prop.value);
11435      if (prop.dynamic) {
11436        dynamicProps += (prop.name) + "," + value + ",";
11437      } else {
11438        staticProps += "\"" + (prop.name) + "\":" + value + ",";
11439      }
11440    }
11441    staticProps = "{" + (staticProps.slice(0, -1)) + "}";
11442    if (dynamicProps) {
11443      return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
11444    } else {
11445      return staticProps
11446    }
11447  }
11448
11449  // #3895, #4268
11450  function transformSpecialNewlines (text) {
11451    return text
11452      .replace(/\u2028/g, '\\u2028')
11453      .replace(/\u2029/g, '\\u2029')
11454  }
11455
11456  /*  */
11457
11458
11459
11460  // these keywords should not appear inside expressions, but operators like
11461  // typeof, instanceof and in are allowed
11462  var prohibitedKeywordRE = new RegExp('\\b' + (
11463    'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
11464    'super,throw,while,yield,delete,export,import,return,switch,default,' +
11465    'extends,finally,continue,debugger,function,arguments'
11466  ).split(',').join('\\b|\\b') + '\\b');
11467
11468  // these unary operators should not be used as property/method names
11469  var unaryOperatorsRE = new RegExp('\\b' + (
11470    'delete,typeof,void'
11471  ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
11472
11473  // strip strings in expressions
11474  var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
11475
11476  // detect problematic expressions in a template
11477  function detectErrors (ast, warn) {
11478    if (ast) {
11479      checkNode(ast, warn);
11480    }
11481  }
11482
11483  function checkNode (node, warn) {
11484    if (node.type === 1) {
11485      for (var name in node.attrsMap) {
11486        if (dirRE.test(name)) {
11487          var value = node.attrsMap[name];
11488          if (value) {
11489            var range = node.rawAttrsMap[name];
11490            if (name === 'v-for') {
11491              checkFor(node, ("v-for=\"" + value + "\""), warn, range);
11492            } else if (onRE.test(name)) {
11493              checkEvent(value, (name + "=\"" + value + "\""), warn, range);
11494            } else {
11495              checkExpression(value, (name + "=\"" + value + "\""), warn, range);
11496            }
11497          }
11498        }
11499      }
11500      if (node.children) {
11501        for (var i = 0; i < node.children.length; i++) {
11502          checkNode(node.children[i], warn);
11503        }
11504      }
11505    } else if (node.type === 2) {
11506      checkExpression(node.expression, node.text, warn, node);
11507    }
11508  }
11509
11510  function checkEvent (exp, text, warn, range) {
11511    var stipped = exp.replace(stripStringRE, '');
11512    var keywordMatch = stipped.match(unaryOperatorsRE);
11513    if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
11514      warn(
11515        "avoid using JavaScript unary operator as property name: " +
11516        "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
11517        range
11518      );
11519    }
11520    checkExpression(exp, text, warn, range);
11521  }
11522
11523  function checkFor (node, text, warn, range) {
11524    checkExpression(node.for || '', text, warn, range);
11525    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
11526    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
11527    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
11528  }
11529
11530  function checkIdentifier (
11531    ident,
11532    type,
11533    text,
11534    warn,
11535    range
11536  ) {
11537    if (typeof ident === 'string') {

11538      try {
11539        new Function(("var " + ident + "=_"));
11540      } catch (e) {
11541        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
11542      }
11543    }
11544  }
11545
11546  function checkExpression (exp, text, warn, range) {
11547    try {
11548      new Function(("return " + exp));
11549    } catch (e) {
11550      var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
11551      if (keywordMatch) {
11552        warn(
11553          "avoid using JavaScript keyword as property name: " +
11554          "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
11555          range
11556        );
11557      } else {
11558        warn(
11559          "invalid expression: " + (e.message) + " in\n\n" +
11560          "    " + exp + "\n\n" +
11561          "  Raw expression: " + (text.trim()) + "\n",
11562          range
11563        );
11564      }
11565    }
11566  }
11567
11568  /*  */
11569
11570  var range = 2;
11571
11572  function generateCodeFrame (
11573    source,
11574    start,
11575    end
11576  ) {
11577    if ( start === void 0 ) start = 0;
11578    if ( end === void 0 ) end = source.length;
11579
11580    var lines = source.split(/\r?\n/);
11581    var count = 0;
11582    var res = [];
11583    for (var i = 0; i < lines.length; i++) {
11584      count += lines[i].length + 1;
11585      if (count >= start) {
11586        for (var j = i - range; j <= i + range || end > count; j++) {
11587          if (j < 0 || j >= lines.length) { continue }
11588          res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
11589          var lineLength = lines[j].length;
11590          if (j === i) {
11591            // push underline
11592            var pad = start - (count - lineLength) + 1;
11593            var length = end > count ? lineLength - pad : end - start;
11594            res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
11595          } else if (j > i) {
11596            if (end > count) {
11597              var length$1 = Math.min(end - count, lineLength);
11598              res.push("   |  " + repeat$1("^", length$1));
11599            }
11600            count += lineLength + 1;
11601          }
11602        }
11603        break
11604      }
11605    }
11606    return res.join('\n')
11607  }
11608
11609  function repeat$1 (str, n) {
11610    var result = '';
11611    if (n > 0) {
11612      while (true) { // eslint-disable-line
11613        if (n & 1) { result += str; }
11614        n >>>= 1;
11615        if (n <= 0) { break }
11616        str += str;
11617      }
11618    }
11619    return result
11620  }
11621
11622  /*  */
11623
11624
11625
11626  function createFunction (code, errors) {
11627    try {
11628      return new Function(code)
11629    } catch (err) {
11630      errors.push({ err: err, code: code });
11631      return noop
11632    }
11633  }
11634
11635  function createCompileToFunctionFn (compile) {
11636    var cache = Object.create(null);
11637
11638    return function compileToFunctions (
11639      template,
11640      options,
11641      vm
11642    ) {
11643      options = extend({}, options);
11644      var warn$$1 = options.warn || warn;
11645      delete options.warn;
11646
11647      /* istanbul ignore if */
11648      {
11649        // detect possible CSP restriction
11650        try {
11651          new Function('return 1');
11652        } catch (e) {
11653          if (e.toString().match(/unsafe-eval|CSP/)) {
11654            warn$$1(
11655              'It seems you are using the standalone build of Vue.js in an ' +
11656              'environment with Content Security Policy that prohibits unsafe-eval. ' +
11657              'The template compiler cannot work in this environment. Consider ' +
11658              'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
11659              'templates into render functions.'
11660            );
11661          }
11662        }
11663      }
11664
11665      // check cache
11666      var key = options.delimiters
11667        ? String(options.delimiters) + template
11668        : template;
11669      if (cache[key]) {
11670        return cache[key]
11671      }
11672
11673      // compile
11674      var compiled = compile(template, options);
11675
11676      // check compilation errors/tips
11677      {
11678        if (compiled.errors && compiled.errors.length) {
11679          if (options.outputSourceRange) {
11680            compiled.errors.forEach(function (e) {
11681              warn$$1(
11682                "Error compiling template:\n\n" + (e.msg) + "\n\n" +
11683                generateCodeFrame(template, e.start, e.end),
11684                vm
11685              );
11686            });
11687          } else {
11688            warn$$1(

11689              "Error compiling template:\n\n" + template + "\n\n" +
11690              compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
11691              vm
11692            );
11693          }
11694        }
11695        if (compiled.tips && compiled.tips.length) {
11696          if (options.outputSourceRange) {
11697            compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
11698          } else {
11699            compiled.tips.forEach(function (msg) { return tip(msg, vm); });
11700          }
11701        }
11702      }
11703
11704      // turn code into functions
11705      var res = {};
11706      var fnGenErrors = [];
11707      res.render = createFunction(compiled.render, fnGenErrors);
11708      res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
11709        return createFunction(code, fnGenErrors)
11710      });
11711
11712      // check function generation errors.
11713      // this should only happen if there is a bug in the compiler itself.
11714      // mostly for codegen development use
11715      /* istanbul ignore if */
11716      {
11717        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
11718          warn$$1(
11719            "Failed to generate render function:\n\n" +
11720            fnGenErrors.map(function (ref) {
11721              var err = ref.err;
11722              var code = ref.code;
11723
11724              return ((err.toString()) + " in\n\n" + code + "\n");
11725          }).join('\n'),
11726            vm
11727          );
11728        }
11729      }
11730
11731      return (cache[key] = res)
11732    }
11733  }
11734
11735  /*  */
11736
11737  function createCompilerCreator (baseCompile) {
11738    return function createCompiler (baseOptions) {
11739      function compile (
11740        template,
11741        options
11742      ) {
11743        var finalOptions = Object.create(baseOptions);
11744        var errors = [];
11745        var tips = [];
11746
11747        var warn = function (msg, range, tip) {
11748          (tip ? tips : errors).push(msg);
11749        };
11750
11751        if (options) {
11752          if (options.outputSourceRange) {
11753            // $flow-disable-line
11754            var leadingSpaceLength = template.match(/^\s*/)[0].length;
11755
11756            warn = function (msg, range, tip) {
11757              var data = { msg: msg };
11758              if (range) {
11759                if (range.start != null) {
11760                  data.start = range.start + leadingSpaceLength;
11761                }
11762                if (range.end != null) {
11763                  data.end = range.end + leadingSpaceLength;
11764                }
11765              }
11766              (tip ? tips : errors).push(data);
11767            };
11768          }
11769          // merge custom modules
11770          if (options.modules) {
11771            finalOptions.modules =
11772              (baseOptions.modules || []).concat(options.modules);
11773          }
11774          // merge custom directives
11775          if (options.directives) {
11776            finalOptions.directives = extend(
11777              Object.create(baseOptions.directives || null),
11778              options.directives
11779            );
11780          }
11781          // copy other options
11782          for (var key in options) {
11783            if (key !== 'modules' && key !== 'directives') {
11784              finalOptions[key] = options[key];
11785            }
11786          }
11787        }
11788
11789        finalOptions.warn = warn;
11790
11791        var compiled = baseCompile(template.trim(), finalOptions);
11792        {
11793          detectErrors(compiled.ast, warn);
11794        }
11795        compiled.errors = errors;
11796        compiled.tips = tips;
11797        return compiled
11798      }
11799
11800      return {
11801        compile: compile,
11802        compileToFunctions: createCompileToFunctionFn(compile)
11803      }
11804    }
11805  }
11806
11807  /*  */
11808
11809  // `createCompilerCreator` allows creating compilers that use alternative
11810  // parser/optimizer/codegen, e.g the SSR optimizing compiler.
11811  // Here we just export a default compiler using the default parts.
11812  var createCompiler = createCompilerCreator(function baseCompile (
11813    template,
11814    options
11815  ) {
11816    var ast = parse(template.trim(), options);
11817    if (options.optimize !== false) {
11818      optimize(ast, options);
11819    }
11820    var code = generate(ast, options);
11821    return {
11822      ast: ast,
11823      render: code.render,
11824      staticRenderFns: code.staticRenderFns
11825    }
11826  });
11827
11828  /*  */
11829
11830  var ref$1 = createCompiler(baseOptions);
11831  var compile = ref$1.compile;
11832  var compileToFunctions = ref$1.compileToFunctions;
11833
11834  /*  */
11835
11836  // check whether current browser encodes a char inside attribute values
11837  var div;
11838  function getShouldDecode (href) {
11839    div = div || document.createElement('div');
11840    div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
11841    return div.innerHTML.indexOf('&#10;') > 0
11842  }
11843
11844  // #3663: IE encodes newlines inside attribute values while other browsers don't
11845  var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;

11846  // #6828: chrome encodes content in a[href]
11847  var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
11848
11849  /*  */
11850
11851  var idToTemplate = cached(function (id) {
11852    var el = query(id);
11853    return el && el.innerHTML
11854  });
11855
11856  var mount = Vue.prototype.$mount;
11857  Vue.prototype.$mount = function (
11858    el,
11859    hydrating
11860  ) {
11861    el = el && query(el);
11862
11863    /* istanbul ignore if */
11864    if (el === document.body || el === document.documentElement) {
11865      warn(
11866        "Do not mount Vue to <html> or <body> - mount to normal elements instead."
11867      );
11868      return this
11869    }
11870
11871    var options = this.$options;
11872    // resolve template/el and convert to render function
11873    if (!options.render) {
11874      var template = options.template;
11875      if (template) {
11876        if (typeof template === 'string') {
11877          if (template.charAt(0) === '#') {
11878            template = idToTemplate(template);
11879            /* istanbul ignore if */
11880            if (!template) {
11881              warn(
11882                ("Template element not found or is empty: " + (options.template)),
11883                this
11884              );
11885            }
11886          }
11887        } else if (template.nodeType) {
11888          template = template.innerHTML;
11889        } else {
11890          {
11891            warn('invalid template option:' + template, this);
11892          }
11893          return this
11894        }
11895      } else if (el) {
11896        template = getOuterHTML(el);
11897      }
11898      if (template) {
11899        /* istanbul ignore if */
11900        if (config.performance && mark) {
11901          mark('compile');
11902        }
11903
11904        var ref = compileToFunctions(template, {
11905          outputSourceRange: "development" !== 'production',
11906          shouldDecodeNewlines: shouldDecodeNewlines,
11907          shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
11908          delimiters: options.delimiters,
11909          comments: options.comments
11910        }, this);
11911        var render = ref.render;
11912        var staticRenderFns = ref.staticRenderFns;
11913        options.render = render;
11914        options.staticRenderFns = staticRenderFns;
11915
11916        /* istanbul ignore if */
11917        if (config.performance && mark) {
11918          mark('compile end');
11919          measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
11920        }
11921      }
11922    }
11923    return mount.call(this, el, hydrating)
11924  };
11925
11926  /**
11927   * Get outerHTML of elements, taking care
11928   * of SVG elements in IE as well.
11929   */
11930  function getOuterHTML (el) {
11931    if (el.outerHTML) {
11932      return el.outerHTML
11933    } else {
11934      var container = document.createElement('div');
11935      container.appendChild(el.cloneNode(true));
11936      return container.innerHTML
11937    }
11938  }
11939
11940  Vue.compile = compileToFunctions;
11941
11942  return Vue;
11943
11944}));