TvB0Bya1

1/*!
2 * Vue.js v2.5.3
3 * (c) 2014-2017 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.Vue = factory());
10}(this, (function () { 'use strict';
11
12/*  */
13
14// these helpers produces better vm code in JS engines due to their
15// explicitness and function inlining
16function isUndef (v) {
17  return v === undefined || v === null
18}
19
20function isDef (v) {
21  return v !== undefined && v !== null
22}
23
24function isTrue (v) {
25  return v === true
26}
27
28function isFalse (v) {
29  return v === false
30}
31
32/**
33 * Check if value is primitive
34 */
35function isPrimitive (value) {
36  return (
37    typeof value === 'string' ||
38    typeof value === 'number' ||
39    typeof value === 'boolean'
40  )
41}
42
43/**
44 * Quick object check - this is primarily used to tell
45 * Objects from primitive values when we know the value
46 * is a JSON-compliant type.
47 */
48function isObject (obj) {
49  return obj !== null && typeof obj === 'object'
50}
51
52/**
53 * Get the raw type string of a value e.g. [object Object]
54 */
55var _toString = Object.prototype.toString;
56
57function toRawType (value) {
58  return _toString.call(value).slice(8, -1)
59}
60
61/**
62 * Strict object type check. Only returns true
63 * for plain JavaScript objects.
64 */
65function isPlainObject (obj) {
66  return _toString.call(obj) === '[object Object]'
67}
68
69function isRegExp (v) {
70  return _toString.call(v) === '[object RegExp]'
71}
72
73/**
74 * Check if val is a valid array index.
75 */
76function isValidArrayIndex (val) {
77  var n = parseFloat(String(val));
78  return n >= 0 && Math.floor(n) === n && isFinite(val)
79}
80
81/**
82 * Convert a value to a string that is actually rendered.
83 */
84function toString (val) {
85  return val == null
86    ? ''
87    : typeof val === 'object'
88      ? JSON.stringify(val, null, 2)
89      : String(val)
90}
91
92/**
93 * Convert a input value to a number for persistence.
94 * If the conversion fails, return original string.
95 */
96function toNumber (val) {
97  var n = parseFloat(val);
98  return isNaN(n) ? val : n
99}
100
101/**
102 * Make a map and return a function for checking if a key
103 * is in that map.
104 */
105function makeMap (
106  str,
107  expectsLowerCase
108) {
109  var map = Object.create(null);
110  var list = str.split(',');
111  for (var i = 0; i < list.length; i++) {
112    map[list[i]] = true;
113  }
114  return expectsLowerCase
115    ? function (val) { return map[val.toLowerCase()]; }
116    : function (val) { return map[val]; }
117}
118
119/**
120 * Check if a tag is a built-in tag.
121 */
122var isBuiltInTag = makeMap('slot,component', true);
123
124/**
125 * Check if a attribute is a reserved attribute.
126 */
127var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
128
129/**
130 * Remove an item from an array
131 */
132function remove (arr, item) {
133  if (arr.length) {
134    var index = arr.indexOf(item);
135    if (index > -1) {
136      return arr.splice(index, 1)
137    }
138  }
139}
140
141/**
142 * Check whether the object has the property.
143 */
144var hasOwnProperty = Object.prototype.hasOwnProperty;
145function hasOwn (obj, key) {
146  return hasOwnProperty.call(obj, key)
147}
148
149/**
150 * Create a cached version of a pure function.
151 */
152function cached (fn) {
153  var cache = Object.create(null);
154  return (function cachedFn (str) {
155    var hit = cache[str];
156    return hit || (cache[str] = fn(str))
157  })
158}
159
160/**
161 * Camelize a hyphen-delimited string.
162 */
163var camelizeRE = /-(\w)/g;
164var camelize = cached(function (str) {
165  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
166});
167
168/**
169 * Capitalize a string.
170 */
171var capitalize = cached(function (str) {
172  return str.charAt(0).toUpperCase() + str.slice(1)
173});
174
175/**
176 * Hyphenate a camelCase string.
177 */
178var hyphenateRE = /\B([A-Z])/g;
179var hyphenate = cached(function (str) {
180  return str.replace(hyphenateRE, '-$1').toLowerCase()
181});
182
183/**
184 * Simple bind, faster than native
185 */
186function bind (fn, ctx) {
187  function boundFn (a) {
188    var l = arguments.length;
189    return l
190      ? l > 1
191        ? fn.apply(ctx, arguments)
192        : fn.call(ctx, a)
193      : fn.call(ctx)
194  }
195  // record original fn length
196  boundFn._length = fn.length;
197  return boundFn
198}
199
200/**
201 * Convert an Array-like object to a real Array.
202 */
203function toArray (list, start) {
204  start = start || 0;
205  var i = list.length - start;
206  var ret = new Array(i);
207  while (i--) {
208    ret[i] = list[i + start];
209  }
210  return ret
211}
212
213/**
214 * Mix properties into target object.
215 */
216function extend (to, _from) {
217  for (var key in _from) {
218    to[key] = _from[key];
219  }
220  return to
221}
222
223/**
224 * Merge an Array of Objects into a single Object.
225 */
226function toObject (arr) {
227  var res = {};
228  for (var i = 0; i < arr.length; i++) {
229    if (arr[i]) {
230      extend(res, arr[i]);
231    }
232  }
233  return res
234}
235
236/**
237 * Perform no operation.
238 * Stubbing args to make Flow happy without leaving useless transpiled code
239 * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
240 */
241function noop (a, b, c) {}
242
243/**
244 * Always return false.
245 */
246var no = function (a, b, c) { return false; };
247
248/**
249 * Return same value
250 */
251var identity = function (_) { return _; };
252
253/**
254 * Generate a static keys string from compiler modules.
255 */
256function genStaticKeys (modules) {
257  return modules.reduce(function (keys, m) {
258    return keys.concat(m.staticKeys || [])
259  }, []).join(',')
260}
261
262/**
263 * Check if two values are loosely equal - that is,
264 * if they are plain objects, do they have the same shape?
265 */
266function looseEqual (a, b) {
267  if (a === b) { return true }
268  var isObjectA = isObject(a);
269  var isObjectB = isObject(b);
270  if (isObjectA && isObjectB) {
271    try {
272      var isArrayA = Array.isArray(a);
273      var isArrayB = Array.isArray(b);
274      if (isArrayA && isArrayB) {
275        return a.length === b.length && a.every(function (e, i) {
276          return looseEqual(e, b[i])
277        })
278      } else if (!isArrayA && !isArrayB) {
279        var keysA = Object.keys(a);
280        var keysB = Object.keys(b);
281        return keysA.length === keysB.length && keysA.every(function (key) {
282          return looseEqual(a[key], b[key])
283        })
284      } else {
285        /* istanbul ignore next */
286        return false
287      }
288    } catch (e) {
289      /* istanbul ignore next */
290      return false
291    }
292  } else if (!isObjectA && !isObjectB) {
293    return String(a) === String(b)
294  } else {
295    return false
296  }
297}
298
299function looseIndexOf (arr, val) {
300  for (var i = 0; i < arr.length; i++) {
301    if (looseEqual(arr[i], val)) { return i }
302  }
303  return -1
304}
305
306/**
307 * Ensure a function is called only once.
308 */
309function once (fn) {
310  var called = false;
311  return function () {
312    if (!called) {
313      called = true;
314      fn.apply(this, arguments);
315    }
316  }
317}
318
319var SSR_ATTR = 'data-server-rendered';
320
321var ASSET_TYPES = [
322  'component',
323  'directive',
324  'filter'
325];
326
327var LIFECYCLE_HOOKS = [
328  'beforeCreate',
329  'created',
330  'beforeMount',
331  'mounted',
332  'beforeUpdate',
333  'updated',
334  'beforeDestroy',
335  'destroyed',
336  'activated',
337  'deactivated',
338  'errorCaptured'
339];
340
341/*  */
342
343var config = ({
344  /**
345   * Option merge strategies (used in core/util/options)
346   */
347  optionMergeStrategies: Object.create(null),
348
349  /**
350   * Whether to suppress warnings.
351   */
352  silent: false,
353
354  /**
355   * Show production mode tip message on boot?
356   */
357  productionTip: "development" !== 'production',
358
359  /**
360   * Whether to enable devtools
361   */
362  devtools: "development" !== 'production',
363
364  /**
365   * Whether to record perf
366   */
367  performance: false,
368
369  /**
370   * Error handler for watcher errors
371   */
372  errorHandler: null,
373
374  /**
375   * Warn handler for watcher warns
376   */
377  warnHandler: null,
378
379  /**
380   * Ignore certain custom elements
381   */
382  ignoredElements: [],
383
384  /**
385   * Custom user key aliases for v-on
386   */
387  keyCodes: Object.create(null),
388
389  /**
390   * Check if a tag is reserved so that it cannot be registered as a
391   * component. This is platform-dependent and may be overwritten.
392   */
393  isReservedTag: no,
394
395  /**
396   * Check if an attribute is reserved so that it cannot be used as a component
397   * prop. This is platform-dependent and may be overwritten.
398   */
399  isReservedAttr: no,
400
401  /**
402   * Check if a tag is an unknown element.
403   * Platform-dependent.
404   */
405  isUnknownElement: no,
406
407  /**
408   * Get the namespace of an element
409   */
410  getTagNamespace: noop,
411
412  /**
413   * Parse the real tag name for the specific platform.
414   */
415  parsePlatformTagName: identity,
416
417  /**
418   * Check if an attribute must be bound using property, e.g. value
419   * Platform-dependent.
420   */
421  mustUseProp: no,
422
423  /**
424   * Exposed for legacy reasons
425   */
426  _lifecycleHooks: LIFECYCLE_HOOKS
427});
428
429/*  */
430
431var emptyObject = Object.freeze({});
432
433/**
434 * Check if a string starts with $ or _
435 */
436function isReserved (str) {
437  var c = (str + '').charCodeAt(0);
438  return c === 0x24 || c === 0x5F
439}
440
441/**
442 * Define a property.
443 */
444function def (obj, key, val, enumerable) {
445  Object.defineProperty(obj, key, {
446    value: val,
447    enumerable: !!enumerable,
448    writable: true,
449    configurable: true
450  });
451}
452
453/**
454 * Parse simple path.
455 */
456var bailRE = /[^\w.$]/;
457function parsePath (path) {
458  if (bailRE.test(path)) {
459    return
460  }
461  var segments = path.split('.');
462  return function (obj) {
463    for (var i = 0; i < segments.length; i++) {
464      if (!obj) { return }
465      obj = obj[segments[i]];
466    }
467    return obj
468  }
469}
470
471/*  */
472
473// can we use __proto__?
474var hasProto = '__proto__' in {};
475
476// Browser environment sniffing
477var inBrowser = typeof window !== 'undefined';
478var UA = inBrowser && window.navigator.userAgent.toLowerCase();
479var isIE = UA && /msie|trident/.test(UA);
480var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
481var isEdge = UA && UA.indexOf('edge/') > 0;
482var isAndroid = UA && UA.indexOf('android') > 0;
483var isIOS = UA && /iphone|ipad|ipod|ios/.test(UA);
484var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
485
486// Firefox has a "watch" function on Object.prototype...
487var nativeWatch = ({}).watch;
488
489var supportsPassive = false;
490if (inBrowser) {
491  try {
492    var opts = {};
493    Object.defineProperty(opts, 'passive', ({
494      get: function get () {
495        /* istanbul ignore next */
496        supportsPassive = true;
497      }
498    })); // https://github.com/facebook/flow/issues/285
499    window.addEventListener('test-passive', null, opts);
500  } catch (e) {}
501}
502
503// this needs to be lazy-evaled because vue may be required before
504// vue-server-renderer can set VUE_ENV
505var _isServer;
506var isServerRendering = function () {
507  if (_isServer === undefined) {
508    /* istanbul ignore if */
509    if (!inBrowser && typeof global !== 'undefined') {
510      // detect presence of vue-server-renderer and avoid
511      // Webpack shimming the process
512      _isServer = global['process'].env.VUE_ENV === 'server';
513    } else {
514      _isServer = false;
515    }
516  }
517  return _isServer
518};
519
520// detect devtools
521var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
522
523/* istanbul ignore next */
524function isNative (Ctor) {
525  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
526}
527
528var hasSymbol =
529  typeof Symbol !== 'undefined' && isNative(Symbol) &&
530  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
531
532var _Set;
533/* istanbul ignore if */ // $flow-disable-line
534if (typeof Set !== 'undefined' && isNative(Set)) {
535  // use native Set when available.
536  _Set = Set;
537} else {
538  // a non-standard Set polyfill that only works with primitive keys.
539  _Set = (function () {
540    function Set () {
541      this.set = Object.create(null);
542    }
543    Set.prototype.has = function has (key) {
544      return this.set[key] === true
545    };
546    Set.prototype.add = function add (key) {
547      this.set[key] = true;
548    };
549    Set.prototype.clear = function clear () {
550      this.set = Object.create(null);
551    };
552
553    return Set;
554  }());
555}
556
557/*  */
558
559var warn = noop;
560var tip = noop;
561var generateComponentTrace = (noop); // work around flow check
562var formatComponentName = (noop);
563
564{
565  var hasConsole = typeof console !== 'undefined';
566  var classifyRE = /(?:^|[-_])(\w)/g;
567  var classify = function (str) { return str
568    .replace(classifyRE, function (c) { return c.toUpperCase(); })
569    .replace(/[-_]/g, ''); };
570
571  warn = function (msg, vm) {
572    var trace = vm ? generateComponentTrace(vm) : '';
573
574    if (config.warnHandler) {
575      config.warnHandler.call(null, msg, vm, trace);
576    } else if (hasConsole && (!config.silent)) {
577      console.error(("[Vue warn]: " + msg + trace));
578    }
579  };
580
581  tip = function (msg, vm) {
582    if (hasConsole && (!config.silent)) {
583      console.warn("[Vue tip]: " + msg + (
584        vm ? generateComponentTrace(vm) : ''
585      ));
586    }
587  };
588
589  formatComponentName = function (vm, includeFile) {
590    if (vm.$root === vm) {
591      return '<Root>'
592    }
593    var options = typeof vm === 'function' && vm.cid != null
594      ? vm.options
595      : vm._isVue
596        ? vm.$options || vm.constructor.options
597        : vm || {};
598    var name = options.name || options._componentTag;
599    var file = options.__file;
600    if (!name && file) {
601      var match = file.match(/([^/\\]+)\.vue$/);
602      name = match && match[1];
603    }
604
605    return (
606      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
607      (file && includeFile !== false ? (" at " + file) : '')
608    )
609  };
610
611  var repeat = function (str, n) {
612    var res = '';
613    while (n) {
614      if (n % 2 === 1) { res += str; }
615      if (n > 1) { str += str; }
616      n >>= 1;
617    }
618    return res
619  };
620
621  generateComponentTrace = function (vm) {
622    if (vm._isVue && vm.$parent) {
623      var tree = [];
624      var currentRecursiveSequence = 0;
625      while (vm) {
626        if (tree.length > 0) {
627          var last = tree[tree.length - 1];
628          if (last.constructor === vm.constructor) {
629            currentRecursiveSequence++;
630            vm = vm.$parent;
631            continue
632          } else if (currentRecursiveSequence > 0) {
633            tree[tree.length - 1] = [last, currentRecursiveSequence];
634            currentRecursiveSequence = 0;
635          }
636        }
637        tree.push(vm);
638        vm = vm.$parent;
639      }
640      return '\n\nfound in\n\n' + tree
641        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
642            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
643            : formatComponentName(vm))); })
644        .join('\n')
645    } else {
646      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
647    }
648  };
649}
650
651/*  */
652
653
654var uid = 0;
655
656/**
657 * A dep is an observable that can have multiple
658 * directives subscribing to it.
659 */
660var Dep = function Dep () {
661  this.id = uid++;
662  this.subs = [];
663};
664
665Dep.prototype.addSub = function addSub (sub) {
666  this.subs.push(sub);
667};
668
669Dep.prototype.removeSub = function removeSub (sub) {
670  remove(this.subs, sub);
671};
672
673Dep.prototype.depend = function depend () {
674  if (Dep.target) {
675    Dep.target.addDep(this);
676  }
677};
678
679Dep.prototype.notify = function notify () {
680  // stabilize the subscriber list first
681  var subs = this.subs.slice();
682  for (var i = 0, l = subs.length; i < l; i++) {
683    subs[i].update();
684  }
685};
686
687// the current target watcher being evaluated.
688// this is globally unique because there could be only one
689// watcher being evaluated at any time.
690Dep.target = null;
691var targetStack = [];
692
693function pushTarget (_target) {
694  if (Dep.target) { targetStack.push(Dep.target); }
695  Dep.target = _target;
696}
697
698function popTarget () {
699  Dep.target = targetStack.pop();
700}
701
702/*  */
703
704var VNode = function VNode (
705  tag,
706  data,
707  children,
708  text,
709  elm,
710  context,
711  componentOptions,
712  asyncFactory
713) {
714  this.tag = tag;
715  this.data = data;
716  this.children = children;
717  this.text = text;
718  this.elm = elm;
719  this.ns = undefined;
720  this.context = context;
721  this.functionalContext = undefined;
722  this.functionalOptions = undefined;
723  this.functionalScopeId = undefined;
724  this.key = data && data.key;
725  this.componentOptions = componentOptions;
726  this.componentInstance = undefined;
727  this.parent = undefined;
728  this.raw = false;
729  this.isStatic = false;
730  this.isRootInsert = true;
731  this.isComment = false;
732  this.isCloned = false;
733  this.isOnce = false;
734  this.asyncFactory = asyncFactory;
735  this.asyncMeta = undefined;
736  this.isAsyncPlaceholder = false;
737};
738
739var prototypeAccessors = { child: { configurable: true } };
740
741// DEPRECATED: alias for componentInstance for backwards compat.
742/* istanbul ignore next */
743prototypeAccessors.child.get = function () {
744  return this.componentInstance
745};
746
747Object.defineProperties( VNode.prototype, prototypeAccessors );
748
749var createEmptyVNode = function (text) {
750  if ( text === void 0 ) text = '';
751
752  var node = new VNode();
753  node.text = text;
754  node.isComment = true;
755  return node
756};
757
758function createTextVNode (val) {
759  return new VNode(undefined, undefined, undefined, String(val))
760}
761
762// optimized shallow clone
763// used for static nodes and slot nodes because they may be reused across
764// multiple renders, cloning them avoids errors when DOM manipulations rely
765// on their elm reference.
766function cloneVNode (vnode, deep) {
767  var componentOptions = vnode.componentOptions;
768  var cloned = new VNode(
769    vnode.tag,
770    vnode.data,
771    vnode.children,
772    vnode.text,
773    vnode.elm,
774    vnode.context,
775    componentOptions,
776    vnode.asyncFactory
777  );
778  cloned.ns = vnode.ns;
779  cloned.isStatic = vnode.isStatic;
780  cloned.key = vnode.key;
781  cloned.isComment = vnode.isComment;
782  cloned.isCloned = true;
783  if (deep) {
784    if (vnode.children) {
785      cloned.children = cloneVNodes(vnode.children, true);
786    }
787    if (componentOptions && componentOptions.children) {
788      componentOptions.children = cloneVNodes(componentOptions.children, true);
789    }
790  }
791  return cloned
792}
793
794function cloneVNodes (vnodes, deep) {
795  var len = vnodes.length;
796  var res = new Array(len);
797  for (var i = 0; i < len; i++) {
798    res[i] = cloneVNode(vnodes[i], deep);
799  }
800  return res
801}
802
803/*
804 * not type checking this file because flow doesn't play well with
805 * dynamically accessing methods on Array prototype
806 */
807
808var arrayProto = Array.prototype;
809var arrayMethods = Object.create(arrayProto);[
810  'push',
811  'pop',
812  'shift',
813  'unshift',
814  'splice',
815  'sort',
816  'reverse'
817]
818.forEach(function (method) {
819  // cache original method
820  var original = arrayProto[method];
821  def(arrayMethods, method, function mutator () {
822    var args = [], len = arguments.length;
823    while ( len-- ) args[ len ] = arguments[ len ];
824
825    var result = original.apply(this, args);
826    var ob = this.__ob__;
827    var inserted;
828    switch (method) {
829      case 'push':
830      case 'unshift':
831        inserted = args;
832        break
833      case 'splice':
834        inserted = args.slice(2);
835        break
836    }
837    if (inserted) { ob.observeArray(inserted); }
838    // notify change
839    ob.dep.notify();
840    return result
841  });
842});
843
844/*  */
845
846var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
847
848/**
849 * By default, when a reactive property is set, the new value is
850 * also converted to become reactive. However when passing down props,
851 * we don't want to force conversion because the value may be a nested value
852 * under a frozen data structure. Converting it would defeat the optimization.
853 */
854var observerState = {
855  shouldConvert: true
856};
857
858/**
859 * Observer class that are attached to each observed
860 * object. Once attached, the observer converts target
861 * object's property keys into getter/setters that
862 * collect dependencies and dispatches updates.
863 */
864var Observer = function Observer (value) {
865  this.value = value;
866  this.dep = new Dep();
867  this.vmCount = 0;
868  def(value, '__ob__', this);
869  if (Array.isArray(value)) {
870    var augment = hasProto
871      ? protoAugment
872      : copyAugment;
873    augment(value, arrayMethods, arrayKeys);
874    this.observeArray(value);
875  } else {
876    this.walk(value);
877  }
878};
879
880/**
881 * Walk through each property and convert them into
882 * getter/setters. This method should only be called when
883 * value type is Object.
884 */
885Observer.prototype.walk = function walk (obj) {
886  var keys = Object.keys(obj);
887  for (var i = 0; i < keys.length; i++) {
888    defineReactive(obj, keys[i], obj[keys[i]]);
889  }
890};
891
892/**
893 * Observe a list of Array items.
894 */
895Observer.prototype.observeArray = function observeArray (items) {
896  for (var i = 0, l = items.length; i < l; i++) {
897    observe(items[i]);
898  }
899};
900
901// helpers
902
903/**
904 * Augment an target Object or Array by intercepting
905 * the prototype chain using __proto__
906 */
907function protoAugment (target, src, keys) {
908  /* eslint-disable no-proto */
909  target.__proto__ = src;
910  /* eslint-enable no-proto */
911}
912
913/**
914 * Augment an target Object or Array by defining
915 * hidden properties.
916 */
917/* istanbul ignore next */
918function copyAugment (target, src, keys) {
919  for (var i = 0, l = keys.length; i < l; i++) {
920    var key = keys[i];
921    def(target, key, src[key]);
922  }
923}
924
925/**
926 * Attempt to create an observer instance for a value,
927 * returns the new observer if successfully observed,
928 * or the existing observer if the value already has one.
929 */
930function observe (value, asRootData) {
931  if (!isObject(value) || value instanceof VNode) {
932    return
933  }
934  var ob;
935  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
936    ob = value.__ob__;
937  } else if (
938    observerState.shouldConvert &&
939    !isServerRendering() &&
940    (Array.isArray(value) || isPlainObject(value)) &&
941    Object.isExtensible(value) &&
942    !value._isVue
943  ) {
944    ob = new Observer(value);
945  }
946  if (asRootData && ob) {
947    ob.vmCount++;
948  }
949  return ob
950}
951
952/**
953 * Define a reactive property on an Object.
954 */
955function defineReactive (
956  obj,
957  key,
958  val,
959  customSetter,
960  shallow
961) {
962  var dep = new Dep();
963
964  var property = Object.getOwnPropertyDescriptor(obj, key);
965  if (property && property.configurable === false) {
966    return
967  }
968
969  // cater for pre-defined getter/setters
970  var getter = property && property.get;
971  var setter = property && property.set;
972
973  var childOb = !shallow && observe(val);
974  Object.defineProperty(obj, key, {
975    enumerable: true,
976    configurable: true,
977    get: function reactiveGetter () {
978      var value = getter ? getter.call(obj) : val;
979      if (Dep.target) {
980        dep.depend();
981        if (childOb) {
982          childOb.dep.depend();
983          if (Array.isArray(value)) {
984            dependArray(value);
985          }
986        }
987      }
988      return value
989    },
990    set: function reactiveSetter (newVal) {
991      var value = getter ? getter.call(obj) : val;
992      /* eslint-disable no-self-compare */
993      if (newVal === value || (newVal !== newVal && value !== value)) {
994        return
995      }
996      /* eslint-enable no-self-compare */
997      if ("development" !== 'production' && customSetter) {
998        customSetter();
999      }
1000      if (setter) {
1001        setter.call(obj, newVal);
1002      } else {
1003        val = newVal;
1004      }
1005      childOb = !shallow && observe(newVal);
1006      dep.notify();
1007    }
1008  });
1009}
1010
1011/**
1012 * Set a property on an object. Adds the new property and
1013 * triggers change notification if the property doesn't
1014 * already exist.
1015 */
1016function set (target, key, val) {
1017  if (Array.isArray(target) && isValidArrayIndex(key)) {
1018    target.length = Math.max(target.length, key);
1019    target.splice(key, 1, val);
1020    return val
1021  }
1022  if (key in target && !(key in Object.prototype)) {
1023    target[key] = val;
1024    return val
1025  }
1026  var ob = (target).__ob__;
1027  if (target._isVue || (ob && ob.vmCount)) {
1028    "development" !== 'production' && warn(
1029      'Avoid adding reactive properties to a Vue instance or its root $data ' +
1030      'at runtime - declare it upfront in the data option.'
1031    );
1032    return val
1033  }
1034  if (!ob) {
1035    target[key] = val;
1036    return val
1037  }
1038  defineReactive(ob.value, key, val);
1039  ob.dep.notify();
1040  return val
1041}
1042
1043/**
1044 * Delete a property and trigger change if necessary.
1045 */
1046function del (target, key) {
1047  if (Array.isArray(target) && isValidArrayIndex(key)) {
1048    target.splice(key, 1);
1049    return
1050  }
1051  var ob = (target).__ob__;
1052  if (target._isVue || (ob && ob.vmCount)) {
1053    "development" !== 'production' && warn(
1054      'Avoid deleting properties on a Vue instance or its root $data ' +
1055      '- just set it to null.'
1056    );
1057    return
1058  }
1059  if (!hasOwn(target, key)) {
1060    return
1061  }
1062  delete target[key];
1063  if (!ob) {
1064    return
1065  }
1066  ob.dep.notify();
1067}
1068
1069/**
1070 * Collect dependencies on array elements when the array is touched, since
1071 * we cannot intercept array element access like property getters.
1072 */
1073function dependArray (value) {
1074  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
1075    e = value[i];
1076    e && e.__ob__ && e.__ob__.dep.depend();
1077    if (Array.isArray(e)) {
1078      dependArray(e);
1079    }
1080  }
1081}
1082
1083/*  */
1084
1085/**
1086 * Option overwriting strategies are functions that handle
1087 * how to merge a parent option value and a child option
1088 * value into the final value.
1089 */
1090var strats = config.optionMergeStrategies;
1091
1092/**
1093 * Options with restrictions
1094 */
1095{
1096  strats.el = strats.propsData = function (parent, child, vm, key) {
1097    if (!vm) {
1098      warn(
1099        "option \"" + key + "\" can only be used during instance " +
1100        'creation with the `new` keyword.'
1101      );
1102    }
1103    return defaultStrat(parent, child)
1104  };
1105}
1106
1107/**
1108 * Helper that recursively merges two data objects together.
1109 */
1110function mergeData (to, from) {
1111  if (!from) { return to }
1112  var key, toVal, fromVal;
1113  var keys = Object.keys(from);
1114  for (var i = 0; i < keys.length; i++) {
1115    key = keys[i];
1116    toVal = to[key];
1117    fromVal = from[key];
1118    if (!hasOwn(to, key)) {
1119      set(to, key, fromVal);
1120    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
1121      mergeData(toVal, fromVal);
1122    }
1123  }
1124  return to
1125}
1126
1127/**
1128 * Data
1129 */
1130function mergeDataOrFn (
1131  parentVal,
1132  childVal,
1133  vm
1134) {
1135  if (!vm) {
1136    // in a Vue.extend merge, both should be functions
1137    if (!childVal) {
1138      return parentVal
1139    }
1140    if (!parentVal) {
1141      return childVal
1142    }
1143    // when parentVal & childVal are both present,
1144    // we need to return a function that returns the
1145    // merged result of both functions... no need to
1146    // check if parentVal is a function here because
1147    // it has to be a function to pass previous merges.
1148    return function mergedDataFn () {
1149      return mergeData(
1150        typeof childVal === 'function' ? childVal.call(this) : childVal,
1151        typeof parentVal === 'function' ? parentVal.call(this) : parentVal
1152      )
1153    }
1154  } else {
1155    return function mergedInstanceDataFn () {
1156      // instance merge
1157      var instanceData = typeof childVal === 'function'
1158        ? childVal.call(vm)
1159        : childVal;
1160      var defaultData = typeof parentVal === 'function'
1161        ? parentVal.call(vm)
1162        : parentVal;
1163      if (instanceData) {
1164        return mergeData(instanceData, defaultData)
1165      } else {
1166        return defaultData
1167      }
1168    }
1169  }
1170}
1171
1172strats.data = function (
1173  parentVal,
1174  childVal,
1175  vm
1176) {
1177  if (!vm) {
1178    if (childVal && typeof childVal !== 'function') {
1179      "development" !== 'production' && warn(
1180        'The "data" option should be a function ' +
1181        'that returns a per-instance value in component ' +
1182        'definitions.',
1183        vm
1184      );
1185
1186      return parentVal
1187    }
1188    return mergeDataOrFn(parentVal, childVal)
1189  }
1190
1191  return mergeDataOrFn(parentVal, childVal, vm)
1192};
1193
1194/**
1195 * Hooks and props are merged as arrays.
1196 */
1197function mergeHook (
1198  parentVal,
1199  childVal
1200) {
1201  return childVal
1202    ? parentVal
1203      ? parentVal.concat(childVal)
1204      : Array.isArray(childVal)
1205        ? childVal
1206        : [childVal]
1207    : parentVal
1208}
1209
1210LIFECYCLE_HOOKS.forEach(function (hook) {
1211  strats[hook] = mergeHook;
1212});
1213
1214/**
1215 * Assets
1216 *
1217 * When a vm is present (instance creation), we need to do
1218 * a three-way merge between constructor options, instance
1219 * options and parent options.
1220 */
1221function mergeAssets (
1222  parentVal,
1223  childVal,
1224  vm,
1225  key
1226) {
1227  var res = Object.create(parentVal || null);
1228  if (childVal) {
1229    "development" !== 'production' && assertObjectType(key, childVal, vm);
1230    return extend(res, childVal)
1231  } else {
1232    return res
1233  }
1234}
1235
1236ASSET_TYPES.forEach(function (type) {
1237  strats[type + 's'] = mergeAssets;
1238});
1239
1240/**
1241 * Watchers.
1242 *
1243 * Watchers hashes should not overwrite one
1244 * another, so we merge them as arrays.
1245 */
1246strats.watch = function (
1247  parentVal,
1248  childVal,
1249  vm,
1250  key
1251) {
1252  // work around Firefox's Object.prototype.watch...
1253  if (parentVal === nativeWatch) { parentVal = undefined; }
1254  if (childVal === nativeWatch) { childVal = undefined; }
1255  /* istanbul ignore if */
1256  if (!childVal) { return Object.create(parentVal || null) }
1257  {
1258    assertObjectType(key, childVal, vm);
1259  }
1260  if (!parentVal) { return childVal }
1261  var ret = {};
1262  extend(ret, parentVal);
1263  for (var key$1 in childVal) {
1264    var parent = ret[key$1];
1265    var child = childVal[key$1];
1266    if (parent && !Array.isArray(parent)) {
1267      parent = [parent];
1268    }
1269    ret[key$1] = parent
1270      ? parent.concat(child)
1271      : Array.isArray(child) ? child : [child];
1272  }
1273  return ret
1274};
1275
1276/**
1277 * Other object hashes.
1278 */
1279strats.props =
1280strats.methods =
1281strats.inject =
1282strats.computed = function (
1283  parentVal,
1284  childVal,
1285  vm,
1286  key
1287) {
1288  if (childVal && "development" !== 'production') {
1289    assertObjectType(key, childVal, vm);
1290  }
1291  if (!parentVal) { return childVal }
1292  var ret = Object.create(null);
1293  extend(ret, parentVal);
1294  if (childVal) { extend(ret, childVal); }
1295  return ret
1296};
1297strats.provide = mergeDataOrFn;
1298
1299/**
1300 * Default strategy.
1301 */
1302var defaultStrat = function (parentVal, childVal) {
1303  return childVal === undefined
1304    ? parentVal
1305    : childVal
1306};
1307
1308/**
1309 * Validate component names
1310 */
1311function checkComponents (options) {
1312  for (var key in options.components) {
1313    var lower = key.toLowerCase();
1314    if (isBuiltInTag(lower) || config.isReservedTag(lower)) {
1315      warn(
1316        'Do not use built-in or reserved HTML elements as component ' +
1317        'id: ' + key
1318      );
1319    }
1320  }
1321}
1322
1323/**
1324 * Ensure all props option syntax are normalized into the
1325 * Object-based format.
1326 */
1327function normalizeProps (options, vm) {
1328  var props = options.props;
1329  if (!props) { return }
1330  var res = {};
1331  var i, val, name;
1332  if (Array.isArray(props)) {
1333    i = props.length;
1334    while (i--) {
1335      val = props[i];
1336      if (typeof val === 'string') {
1337        name = camelize(val);
1338        res[name] = { type: null };
1339      } else {
1340        warn('props must be strings when using array syntax.');
1341      }
1342    }
1343  } else if (isPlainObject(props)) {
1344    for (var key in props) {
1345      val = props[key];
1346      name = camelize(key);
1347      res[name] = isPlainObject(val)
1348        ? val
1349        : { type: val };
1350    }
1351  } else {
1352    warn(
1353      "Invalid value for option \"props\": expected an Array or an Object, " +
1354      "but got " + (toRawType(props)) + ".",
1355      vm
1356    );
1357  }
1358  options.props = res;
1359}
1360
1361/**
1362 * Normalize all injections into Object-based format
1363 */
1364function normalizeInject (options, vm) {
1365  var inject = options.inject;
1366  var normalized = options.inject = {};
1367  if (Array.isArray(inject)) {
1368    for (var i = 0; i < inject.length; i++) {
1369      normalized[inject[i]] = { from: inject[i] };
1370    }
1371  } else if (isPlainObject(inject)) {
1372    for (var key in inject) {
1373      var val = inject[key];
1374      normalized[key] = isPlainObject(val)
1375        ? extend({ from: key }, val)
1376        : { from: val };
1377    }
1378  } else if ("development" !== 'production' && inject) {
1379    warn(
1380      "Invalid value for option \"inject\": expected an Array or an Object, " +
1381      "but got " + (toRawType(inject)) + ".",
1382      vm
1383    );
1384  }
1385}
1386
1387/**
1388 * Normalize raw function directives into object format.
1389 */
1390function normalizeDirectives (options) {
1391  var dirs = options.directives;
1392  if (dirs) {
1393    for (var key in dirs) {
1394      var def = dirs[key];
1395      if (typeof def === 'function') {
1396        dirs[key] = { bind: def, update: def };
1397      }
1398    }
1399  }
1400}
1401
1402function assertObjectType (name, value, vm) {
1403  if (!isPlainObject(value)) {
1404    warn(
1405      "Invalid value for option \"" + name + "\": expected an Object, " +
1406      "but got " + (toRawType(value)) + ".",
1407      vm
1408    );
1409  }
1410}
1411
1412/**
1413 * Merge two option objects into a new one.
1414 * Core utility used in both instantiation and inheritance.
1415 */
1416function mergeOptions (
1417  parent,
1418  child,
1419  vm
1420) {
1421  {
1422    checkComponents(child);
1423  }
1424
1425  if (typeof child === 'function') {
1426    child = child.options;
1427  }
1428
1429  normalizeProps(child, vm);
1430  normalizeInject(child, vm);
1431  normalizeDirectives(child);
1432  var extendsFrom = child.extends;
1433  if (extendsFrom) {
1434    parent = mergeOptions(parent, extendsFrom, vm);
1435  }
1436  if (child.mixins) {
1437    for (var i = 0, l = child.mixins.length; i < l; i++) {
1438      parent = mergeOptions(parent, child.mixins[i], vm);
1439    }
1440  }
1441  var options = {};
1442  var key;
1443  for (key in parent) {
1444    mergeField(key);
1445  }
1446  for (key in child) {
1447    if (!hasOwn(parent, key)) {
1448      mergeField(key);
1449    }
1450  }
1451  function mergeField (key) {
1452    var strat = strats[key] || defaultStrat;
1453    options[key] = strat(parent[key], child[key], vm, key);
1454  }
1455  return options
1456}
1457
1458/**
1459 * Resolve an asset.
1460 * This function is used because child instances need access
1461 * to assets defined in its ancestor chain.
1462 */
1463function resolveAsset (
1464  options,
1465  type,
1466  id,
1467  warnMissing
1468) {
1469  /* istanbul ignore if */
1470  if (typeof id !== 'string') {
1471    return
1472  }
1473  var assets = options[type];
1474  // check local registration variations first
1475  if (hasOwn(assets, id)) { return assets[id] }
1476  var camelizedId = camelize(id);
1477  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
1478  var PascalCaseId = capitalize(camelizedId);
1479  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
1480  // fallback to prototype chain
1481  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
1482  if ("development" !== 'production' && warnMissing && !res) {
1483    warn(
1484      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
1485      options
1486    );
1487  }
1488  return res
1489}
1490
1491/*  */
1492
1493function validateProp (
1494  key,
1495  propOptions,
1496  propsData,
1497  vm
1498) {
1499  var prop = propOptions[key];
1500  var absent = !hasOwn(propsData, key);
1501  var value = propsData[key];
1502  // handle boolean props
1503  if (isType(Boolean, prop.type)) {
1504    if (absent && !hasOwn(prop, 'default')) {
1505      value = false;
1506    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
1507      value = true;
1508    }
1509  }
1510  // check default value
1511  if (value === undefined) {
1512    value = getPropDefaultValue(vm, prop, key);
1513    // since the default value is a fresh copy,
1514    // make sure to observe it.
1515    var prevShouldConvert = observerState.shouldConvert;
1516    observerState.shouldConvert = true;
1517    observe(value);
1518    observerState.shouldConvert = prevShouldConvert;
1519  }
1520  {
1521    assertProp(prop, key, value, vm, absent);
1522  }
1523  return value
1524}
1525
1526/**
1527 * Get the default value of a prop.
1528 */
1529function getPropDefaultValue (vm, prop, key) {
1530  // no default, return undefined
1531  if (!hasOwn(prop, 'default')) {
1532    return undefined
1533  }
1534  var def = prop.default;
1535  // warn against non-factory defaults for Object & Array
1536  if ("development" !== 'production' && isObject(def)) {
1537    warn(
1538      'Invalid default value for prop "' + key + '": ' +
1539      'Props with type Object/Array must use a factory function ' +
1540      'to return the default value.',
1541      vm
1542    );
1543  }
1544  // the raw prop value was also undefined from previous render,
1545  // return previous default value to avoid unnecessary watcher trigger
1546  if (vm && vm.$options.propsData &&
1547    vm.$options.propsData[key] === undefined &&
1548    vm._props[key] !== undefined
1549  ) {
1550    return vm._props[key]
1551  }
1552  // call factory function for non-Function types
1553  // a value is Function if its prototype is function even across different execution context
1554  return typeof def === 'function' && getType(prop.type) !== 'Function'
1555    ? def.call(vm)
1556    : def
1557}
1558
1559/**
1560 * Assert whether a prop is valid.
1561 */
1562function assertProp (
1563  prop,
1564  name,
1565  value,
1566  vm,
1567  absent
1568) {
1569  if (prop.required && absent) {
1570    warn(
1571      'Missing required prop: "' + name + '"',
1572      vm
1573    );
1574    return
1575  }
1576  if (value == null && !prop.required) {
1577    return
1578  }
1579  var type = prop.type;
1580  var valid = !type || type === true;
1581  var expectedTypes = [];
1582  if (type) {
1583    if (!Array.isArray(type)) {
1584      type = [type];
1585    }
1586    for (var i = 0; i < type.length && !valid; i++) {
1587      var assertedType = assertType(value, type[i]);
1588      expectedTypes.push(assertedType.expectedType || '');
1589      valid = assertedType.valid;
1590    }
1591  }
1592  if (!valid) {
1593    warn(
1594      "Invalid prop: type check failed for prop \"" + name + "\"." +
1595      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
1596      ", got " + (toRawType(value)) + ".",
1597      vm
1598    );
1599    return
1600  }
1601  var validator = prop.validator;
1602  if (validator) {
1603    if (!validator(value)) {
1604      warn(
1605        'Invalid prop: custom validator check failed for prop "' + name + '".',
1606        vm
1607      );
1608    }
1609  }
1610}
1611
1612var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
1613
1614function assertType (value, type) {
1615  var valid;
1616  var expectedType = getType(type);
1617  if (simpleCheckRE.test(expectedType)) {
1618    var t = typeof value;
1619    valid = t === expectedType.toLowerCase();
1620    // for primitive wrapper objects
1621    if (!valid && t === 'object') {
1622      valid = value instanceof type;
1623    }
1624  } else if (expectedType === 'Object') {
1625    valid = isPlainObject(value);
1626  } else if (expectedType === 'Array') {
1627    valid = Array.isArray(value);
1628  } else {
1629    valid = value instanceof type;
1630  }
1631  return {
1632    valid: valid,
1633    expectedType: expectedType
1634  }
1635}
1636
1637/**
1638 * Use function string name to check built-in types,
1639 * because a simple equality check will fail when running
1640 * across different vms / iframes.
1641 */
1642function getType (fn) {
1643  var match = fn && fn.toString().match(/^\s*function (\w+)/);
1644  return match ? match[1] : ''
1645}
1646
1647function isType (type, fn) {
1648  if (!Array.isArray(fn)) {
1649    return getType(fn) === getType(type)
1650  }
1651  for (var i = 0, len = fn.length; i < len; i++) {
1652    if (getType(fn[i]) === getType(type)) {
1653      return true
1654    }
1655  }
1656  /* istanbul ignore next */
1657  return false
1658}
1659
1660/*  */
1661
1662function handleError (err, vm, info) {
1663  if (vm) {
1664    var cur = vm;
1665    while ((cur = cur.$parent)) {
1666      var hooks = cur.$options.errorCaptured;
1667      if (hooks) {
1668        for (var i = 0; i < hooks.length; i++) {
1669          try {
1670            var capture = hooks[i].call(cur, err, vm, info) === false;
1671            if (capture) { return }
1672          } catch (e) {
1673            globalHandleError(e, cur, 'errorCaptured hook');
1674          }
1675        }
1676      }
1677    }
1678  }
1679  globalHandleError(err, vm, info);
1680}
1681
1682function globalHandleError (err, vm, info) {
1683  if (config.errorHandler) {
1684    try {
1685      return config.errorHandler.call(null, err, vm, info)
1686    } catch (e) {
1687      logError(e, null, 'config.errorHandler');
1688    }
1689  }
1690  logError(err, vm, info);
1691}
1692
1693function logError (err, vm, info) {
1694  {
1695    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
1696  }
1697  /* istanbul ignore else */
1698  if (inBrowser && typeof console !== 'undefined') {
1699    console.error(err);
1700  } else {
1701    throw err
1702  }
1703}
1704
1705/*  */
1706/* globals MessageChannel */
1707
1708var callbacks = [];
1709var pending = false;
1710
1711function flushCallbacks () {
1712  pending = false;
1713  var copies = callbacks.slice(0);
1714  callbacks.length = 0;
1715  for (var i = 0; i < copies.length; i++) {
1716    copies[i]();
1717  }
1718}
1719
1720// Here we have async deferring wrappers using both micro and macro tasks.
1721// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
1722// micro tasks have too high a priority and fires in between supposedly
1723// sequential events (e.g. #4521, #6690) or even between bubbling of the same
1724// event (#6566). However, using macro tasks everywhere also has subtle problems
1725// when state is changed right before repaint (e.g. #6813, out-in transitions).
1726// Here we use micro task by default, but expose a way to force macro task when
1727// needed (e.g. in event handlers attached by v-on).
1728var microTimerFunc;
1729var macroTimerFunc;
1730var useMacroTask = false;
1731
1732// Determine (macro) Task defer implementation.
1733// Technically setImmediate should be the ideal choice, but it's only available
1734// in IE. The only polyfill that consistently queues the callback after all DOM
1735// events triggered in the same loop is by using MessageChannel.
1736/* istanbul ignore if */
1737if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
1738  macroTimerFunc = function () {
1739    setImmediate(flushCallbacks);
1740  };
1741} else if (typeof MessageChannel !== 'undefined' && (
1742  isNative(MessageChannel) ||
1743  // PhantomJS
1744  MessageChannel.toString() === '[object MessageChannelConstructor]'
1745)) {
1746  var channel = new MessageChannel();
1747  var port = channel.port2;
1748  channel.port1.onmessage = flushCallbacks;
1749  macroTimerFunc = function () {
1750    port.postMessage(1);
1751  };
1752} else {
1753  /* istanbul ignore next */
1754  macroTimerFunc = function () {
1755    setTimeout(flushCallbacks, 0);
1756  };
1757}
1758
1759// Determine MicroTask defer implementation.
1760/* istanbul ignore next, $flow-disable-line */
1761if (typeof Promise !== 'undefined' && isNative(Promise)) {
1762  var p = Promise.resolve();
1763  microTimerFunc = function () {
1764    p.then(flushCallbacks);
1765    // in problematic UIWebViews, Promise.then doesn't completely break, but
1766    // it can get stuck in a weird state where callbacks are pushed into the
1767    // microtask queue but the queue isn't being flushed, until the browser
1768    // needs to do some other work, e.g. handle a timer. Therefore we can
1769    // "force" the microtask queue to be flushed by adding an empty timer.
1770    if (isIOS) { setTimeout(noop); }
1771  };
1772} else {
1773  // fallback to macro
1774  microTimerFunc = macroTimerFunc;
1775}
1776
1777/**
1778 * Wrap a function so that if any code inside triggers state change,
1779 * the changes are queued using a Task instead of a MicroTask.
1780 */
1781function withMacroTask (fn) {
1782  return fn._withTask || (fn._withTask = function () {
1783    useMacroTask = true;
1784    var res = fn.apply(null, arguments);
1785    useMacroTask = false;
1786    return res
1787  })
1788}
1789
1790function nextTick (cb, ctx) {
1791  var _resolve;
1792  callbacks.push(function () {
1793    if (cb) {
1794      try {
1795        cb.call(ctx);
1796      } catch (e) {
1797        handleError(e, ctx, 'nextTick');
1798      }
1799    } else if (_resolve) {
1800      _resolve(ctx);
1801    }
1802  });
1803  if (!pending) {
1804    pending = true;
1805    if (useMacroTask) {
1806      macroTimerFunc();
1807    } else {
1808      microTimerFunc();
1809    }
1810  }
1811  // $flow-disable-line
1812  if (!cb && typeof Promise !== 'undefined') {
1813    return new Promise(function (resolve) {
1814      _resolve = resolve;
1815    })
1816  }
1817}
1818
1819/*  */
1820
1821var mark;
1822var measure;
1823
1824{
1825  var perf = inBrowser && window.performance;
1826  /* istanbul ignore if */
1827  if (
1828    perf &&
1829    perf.mark &&
1830    perf.measure &&
1831    perf.clearMarks &&
1832    perf.clearMeasures
1833  ) {
1834    mark = function (tag) { return perf.mark(tag); };
1835    measure = function (name, startTag, endTag) {
1836      perf.measure(name, startTag, endTag);
1837      perf.clearMarks(startTag);
1838      perf.clearMarks(endTag);
1839      perf.clearMeasures(name);
1840    };
1841  }
1842}
1843
1844/* not type checking this file because flow doesn't play well with Proxy */
1845
1846var initProxy;
1847
1848{
1849  var allowedGlobals = makeMap(
1850    'Infinity,undefined,NaN,isFinite,isNaN,' +
1851    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
1852    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
1853    'require' // for Webpack/Browserify
1854  );
1855
1856  var warnNonPresent = function (target, key) {
1857    warn(
1858      "Property or method \"" + key + "\" is not defined on the instance but " +
1859      'referenced during render. Make sure that this property is reactive, ' +
1860      'either in the data option, or for class-based components, by ' +
1861      'initializing the property. ' +
1862      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
1863      target
1864    );
1865  };
1866
1867  var hasProxy =
1868    typeof Proxy !== 'undefined' &&
1869    Proxy.toString().match(/native code/);
1870
1871  if (hasProxy) {
1872    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
1873    config.keyCodes = new Proxy(config.keyCodes, {
1874      set: function set (target, key, value) {
1875        if (isBuiltInModifier(key)) {
1876          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
1877          return false
1878        } else {
1879          target[key] = value;
1880          return true
1881        }
1882      }
1883    });
1884  }
1885
1886  var hasHandler = {
1887    has: function has (target, key) {
1888      var has = key in target;
1889      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
1890      if (!has && !isAllowed) {
1891        warnNonPresent(target, key);
1892      }
1893      return has || !isAllowed
1894    }
1895  };
1896
1897  var getHandler = {
1898    get: function get (target, key) {
1899      if (typeof key === 'string' && !(key in target)) {
1900        warnNonPresent(target, key);
1901      }
1902      return target[key]
1903    }
1904  };
1905
1906  initProxy = function initProxy (vm) {
1907    if (hasProxy) {
1908      // determine which proxy handler to use
1909      var options = vm.$options;
1910      var handlers = options.render && options.render._withStripped
1911        ? getHandler
1912        : hasHandler;
1913      vm._renderProxy = new Proxy(vm, handlers);
1914    } else {
1915      vm._renderProxy = vm;
1916    }
1917  };
1918}
1919
1920/*  */
1921
1922var normalizeEvent = cached(function (name) {
1923  var passive = name.charAt(0) === '&';
1924  name = passive ? name.slice(1) : name;
1925  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
1926  name = once$$1 ? name.slice(1) : name;
1927  var capture = name.charAt(0) === '!';
1928  name = capture ? name.slice(1) : name;
1929  return {
1930    name: name,
1931    once: once$$1,
1932    capture: capture,
1933    passive: passive
1934  }
1935});
1936
1937function createFnInvoker (fns) {
1938  function invoker () {
1939    var arguments$1 = arguments;
1940
1941    var fns = invoker.fns;
1942    if (Array.isArray(fns)) {
1943      var cloned = fns.slice();
1944      for (var i = 0; i < cloned.length; i++) {
1945        cloned[i].apply(null, arguments$1);
1946      }
1947    } else {
1948      // return handler return value for single handlers
1949      return fns.apply(null, arguments)
1950    }
1951  }
1952  invoker.fns = fns;
1953  return invoker
1954}
1955
1956function updateListeners (
1957  on,
1958  oldOn,
1959  add,
1960  remove$$1,
1961  vm
1962) {
1963  var name, cur, old, event;
1964  for (name in on) {
1965    cur = on[name];
1966    old = oldOn[name];
1967    event = normalizeEvent(name);
1968    if (isUndef(cur)) {
1969      "development" !== 'production' && warn(
1970        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
1971        vm
1972      );
1973    } else if (isUndef(old)) {
1974      if (isUndef(cur.fns)) {
1975        cur = on[name] = createFnInvoker(cur);
1976      }
1977      add(event.name, cur, event.once, event.capture, event.passive);
1978    } else if (cur !== old) {
1979      old.fns = cur;
1980      on[name] = old;
1981    }
1982  }
1983  for (name in oldOn) {
1984    if (isUndef(on[name])) {
1985      event = normalizeEvent(name);
1986      remove$$1(event.name, oldOn[name], event.capture);
1987    }
1988  }
1989}
1990
1991/*  */
1992
1993function mergeVNodeHook (def, hookKey, hook) {
1994  if (def instanceof VNode) {
1995    def = def.data.hook || (def.data.hook = {});
1996  }
1997  var invoker;
1998  var oldHook = def[hookKey];
1999
2000  function wrappedHook () {
2001    hook.apply(this, arguments);
2002    // important: remove merged hook to ensure it's called only once
2003    // and prevent memory leak
2004    remove(invoker.fns, wrappedHook);
2005  }
2006
2007  if (isUndef(oldHook)) {
2008    // no existing hook
2009    invoker = createFnInvoker([wrappedHook]);
2010  } else {
2011    /* istanbul ignore if */
2012    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
2013      // already a merged invoker
2014      invoker = oldHook;
2015      invoker.fns.push(wrappedHook);
2016    } else {
2017      // existing plain hook
2018      invoker = createFnInvoker([oldHook, wrappedHook]);
2019    }
2020  }
2021
2022  invoker.merged = true;
2023  def[hookKey] = invoker;
2024}
2025
2026/*  */
2027
2028function extractPropsFromVNodeData (
2029  data,
2030  Ctor,
2031  tag
2032) {
2033  // we are only extracting raw values here.
2034  // validation and default values are handled in the child
2035  // component itself.
2036  var propOptions = Ctor.options.props;
2037  if (isUndef(propOptions)) {
2038    return
2039  }
2040  var res = {};
2041  var attrs = data.attrs;
2042  var props = data.props;
2043  if (isDef(attrs) || isDef(props)) {
2044    for (var key in propOptions) {
2045      var altKey = hyphenate(key);
2046      {
2047        var keyInLowerCase = key.toLowerCase();
2048        if (
2049          key !== keyInLowerCase &&
2050          attrs && hasOwn(attrs, keyInLowerCase)
2051        ) {
2052          tip(
2053            "Prop \"" + keyInLowerCase + "\" is passed to component " +
2054            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
2055            " \"" + key + "\". " +
2056            "Note that HTML attributes are case-insensitive and camelCased " +
2057            "props need to use their kebab-case equivalents when using in-DOM " +
2058            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
2059          );
2060        }
2061      }
2062      checkProp(res, props, key, altKey, true) ||
2063      checkProp(res, attrs, key, altKey, false);
2064    }
2065  }
2066  return res
2067}
2068
2069function checkProp (
2070  res,
2071  hash,
2072  key,
2073  altKey,
2074  preserve
2075) {
2076  if (isDef(hash)) {
2077    if (hasOwn(hash, key)) {
2078      res[key] = hash[key];
2079      if (!preserve) {
2080        delete hash[key];
2081      }
2082      return true
2083    } else if (hasOwn(hash, altKey)) {
2084      res[key] = hash[altKey];
2085      if (!preserve) {
2086        delete hash[altKey];
2087      }
2088      return true
2089    }
2090  }
2091  return false
2092}
2093
2094/*  */
2095
2096// The template compiler attempts to minimize the need for normalization by
2097// statically analyzing the template at compile time.
2098//
2099// For plain HTML markup, normalization can be completely skipped because the
2100// generated render function is guaranteed to return Array<VNode>. There are
2101// two cases where extra normalization is needed:
2102
2103// 1. When the children contains components - because a functional component
2104// may return an Array instead of a single root. In this case, just a simple
2105// normalization is needed - if any child is an Array, we flatten the whole
2106// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
2107// because functional components already normalize their own children.
2108function simpleNormalizeChildren (children) {
2109  for (var i = 0; i < children.length; i++) {
2110    if (Array.isArray(children[i])) {
2111      return Array.prototype.concat.apply([], children)
2112    }
2113  }
2114  return children
2115}
2116
2117// 2. When the children contains constructs that always generated nested Arrays,
2118// e.g. <template>, <slot>, v-for, or when the children is provided by user
2119// with hand-written render functions / JSX. In such cases a full normalization
2120// is needed to cater to all possible types of children values.
2121function normalizeChildren (children) {
2122  return isPrimitive(children)
2123    ? [createTextVNode(children)]
2124    : Array.isArray(children)
2125      ? normalizeArrayChildren(children)
2126      : undefined
2127}
2128
2129function isTextNode (node) {
2130  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
2131}
2132
2133function normalizeArrayChildren (children, nestedIndex) {
2134  var res = [];
2135  var i, c, lastIndex, last;
2136  for (i = 0; i < children.length; i++) {
2137    c = children[i];
2138    if (isUndef(c) || typeof c === 'boolean') { continue }
2139    lastIndex = res.length - 1;
2140    last = res[lastIndex];
2141    //  nested
2142    if (Array.isArray(c)) {
2143      if (c.length > 0) {
2144        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
2145        // merge adjacent text nodes
2146        if (isTextNode(c[0]) && isTextNode(last)) {
2147          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
2148          c.shift();
2149        }
2150        res.push.apply(res, c);
2151      }
2152    } else if (isPrimitive(c)) {
2153      if (isTextNode(last)) {
2154        // merge adjacent text nodes
2155        // this is necessary for SSR hydration because text nodes are
2156        // essentially merged when rendered to HTML strings
2157        res[lastIndex] = createTextVNode(last.text + c);
2158      } else if (c !== '') {
2159        // convert primitive to vnode
2160        res.push(createTextVNode(c));
2161      }
2162    } else {
2163      if (isTextNode(c) && isTextNode(last)) {
2164        // merge adjacent text nodes
2165        res[lastIndex] = createTextVNode(last.text + c.text);
2166      } else {
2167        // default key for nested array children (likely generated by v-for)
2168        if (isTrue(children._isVList) &&
2169          isDef(c.tag) &&
2170          isUndef(c.key) &&
2171          isDef(nestedIndex)) {
2172          c.key = "__vlist" + nestedIndex + "_" + i + "__";
2173        }
2174        res.push(c);
2175      }
2176    }
2177  }
2178  return res
2179}
2180
2181/*  */
2182
2183function ensureCtor (comp, base) {
2184  if (
2185    comp.__esModule ||
2186    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
2187  ) {
2188    comp = comp.default;
2189  }
2190  return isObject(comp)
2191    ? base.extend(comp)
2192    : comp
2193}
2194
2195function createAsyncPlaceholder (
2196  factory,
2197  data,
2198  context,
2199  children,
2200  tag
2201) {
2202  var node = createEmptyVNode();
2203  node.asyncFactory = factory;
2204  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
2205  return node
2206}
2207
2208function resolveAsyncComponent (
2209  factory,
2210  baseCtor,
2211  context
2212) {
2213  if (isTrue(factory.error) && isDef(factory.errorComp)) {
2214    return factory.errorComp
2215  }
2216
2217  if (isDef(factory.resolved)) {
2218    return factory.resolved
2219  }
2220
2221  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
2222    return factory.loadingComp
2223  }
2224
2225  if (isDef(factory.contexts)) {
2226    // already pending
2227    factory.contexts.push(context);
2228  } else {
2229    var contexts = factory.contexts = [context];
2230    var sync = true;
2231
2232    var forceRender = function () {
2233      for (var i = 0, l = contexts.length; i < l; i++) {
2234        contexts[i].$forceUpdate();
2235      }
2236    };
2237
2238    var resolve = once(function (res) {
2239      // cache resolved
2240      factory.resolved = ensureCtor(res, baseCtor);
2241      // invoke callbacks only if this is not a synchronous resolve
2242      // (async resolves are shimmed as synchronous during SSR)
2243      if (!sync) {
2244        forceRender();
2245      }
2246    });
2247
2248    var reject = once(function (reason) {
2249      "development" !== 'production' && warn(
2250        "Failed to resolve async component: " + (String(factory)) +
2251        (reason ? ("\nReason: " + reason) : '')
2252      );
2253      if (isDef(factory.errorComp)) {
2254        factory.error = true;
2255        forceRender();
2256      }
2257    });
2258
2259    var res = factory(resolve, reject);
2260
2261    if (isObject(res)) {
2262      if (typeof res.then === 'function') {
2263        // () => Promise
2264        if (isUndef(factory.resolved)) {
2265          res.then(resolve, reject);
2266        }
2267      } else if (isDef(res.component) && typeof res.component.then === 'function') {
2268        res.component.then(resolve, reject);
2269
2270        if (isDef(res.error)) {
2271          factory.errorComp = ensureCtor(res.error, baseCtor);
2272        }
2273
2274        if (isDef(res.loading)) {
2275          factory.loadingComp = ensureCtor(res.loading, baseCtor);
2276          if (res.delay === 0) {
2277            factory.loading = true;
2278          } else {
2279            setTimeout(function () {
2280              if (isUndef(factory.resolved) && isUndef(factory.error)) {
2281                factory.loading = true;
2282                forceRender();
2283              }
2284            }, res.delay || 200);
2285          }
2286        }
2287
2288        if (isDef(res.timeout)) {
2289          setTimeout(function () {
2290            if (isUndef(factory.resolved)) {
2291              reject(
2292                "timeout (" + (res.timeout) + "ms)"
2293              );
2294            }
2295          }, res.timeout);
2296        }
2297      }
2298    }
2299
2300    sync = false;
2301    // return in case resolved synchronously
2302    return factory.loading
2303      ? factory.loadingComp
2304      : factory.resolved
2305  }
2306}
2307
2308/*  */
2309
2310function isAsyncPlaceholder (node) {
2311  return node.isComment && node.asyncFactory
2312}
2313
2314/*  */
2315
2316function getFirstComponentChild (children) {
2317  if (Array.isArray(children)) {
2318    for (var i = 0; i < children.length; i++) {
2319      var c = children[i];
2320      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
2321        return c
2322      }
2323    }
2324  }
2325}
2326
2327/*  */
2328
2329/*  */
2330
2331function initEvents (vm) {
2332  vm._events = Object.create(null);
2333  vm._hasHookEvent = false;
2334  // init parent attached events
2335  var listeners = vm.$options._parentListeners;
2336  if (listeners) {
2337    updateComponentListeners(vm, listeners);
2338  }
2339}
2340
2341var target;
2342
2343function add (event, fn, once) {
2344  if (once) {
2345    target.$once(event, fn);
2346  } else {
2347    target.$on(event, fn);
2348  }
2349}
2350
2351function remove$1 (event, fn) {
2352  target.$off(event, fn);
2353}
2354
2355function updateComponentListeners (
2356  vm,
2357  listeners,
2358  oldListeners
2359) {
2360  target = vm;
2361  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
2362  target = undefined;
2363}
2364
2365function eventsMixin (Vue) {
2366  var hookRE = /^hook:/;
2367  Vue.prototype.$on = function (event, fn) {
2368    var this$1 = this;
2369
2370    var vm = this;
2371    if (Array.isArray(event)) {
2372      for (var i = 0, l = event.length; i < l; i++) {
2373        this$1.$on(event[i], fn);
2374      }
2375    } else {
2376      (vm._events[event] || (vm._events[event] = [])).push(fn);
2377      // optimize hook:event cost by using a boolean flag marked at registration
2378      // instead of a hash lookup
2379      if (hookRE.test(event)) {
2380        vm._hasHookEvent = true;
2381      }
2382    }
2383    return vm
2384  };
2385
2386  Vue.prototype.$once = function (event, fn) {
2387    var vm = this;
2388    function on () {
2389      vm.$off(event, on);
2390      fn.apply(vm, arguments);
2391    }
2392    on.fn = fn;
2393    vm.$on(event, on);
2394    return vm
2395  };
2396
2397  Vue.prototype.$off = function (event, fn) {
2398    var this$1 = this;
2399
2400    var vm = this;
2401    // all
2402    if (!arguments.length) {
2403      vm._events = Object.create(null);
2404      return vm
2405    }
2406    // array of events
2407    if (Array.isArray(event)) {
2408      for (var i = 0, l = event.length; i < l; i++) {
2409        this$1.$off(event[i], fn);
2410      }
2411      return vm
2412    }
2413    // specific event
2414    var cbs = vm._events[event];
2415    if (!cbs) {
2416      return vm
2417    }
2418    if (!fn) {
2419      vm._events[event] = null;
2420      return vm
2421    }
2422    if (fn) {
2423      // specific handler
2424      var cb;
2425      var i$1 = cbs.length;
2426      while (i$1--) {
2427        cb = cbs[i$1];
2428        if (cb === fn || cb.fn === fn) {
2429          cbs.splice(i$1, 1);
2430          break
2431        }
2432      }
2433    }
2434    return vm
2435  };
2436
2437  Vue.prototype.$emit = function (event) {
2438    var vm = this;
2439    {
2440      var lowerCaseEvent = event.toLowerCase();
2441      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
2442        tip(
2443          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
2444          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
2445          "Note that HTML attributes are case-insensitive and you cannot use " +
2446          "v-on to listen to camelCase events when using in-DOM templates. " +
2447          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
2448        );
2449      }
2450    }
2451    var cbs = vm._events[event];
2452    if (cbs) {
2453      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
2454      var args = toArray(arguments, 1);
2455      for (var i = 0, l = cbs.length; i < l; i++) {
2456        try {
2457          cbs[i].apply(vm, args);
2458        } catch (e) {
2459          handleError(e, vm, ("event handler for \"" + event + "\""));
2460        }
2461      }
2462    }
2463    return vm
2464  };
2465}
2466
2467/*  */
2468
2469/**
2470 * Runtime helper for resolving raw children VNodes into a slot object.
2471 */
2472function resolveSlots (
2473  children,
2474  context
2475) {
2476  var slots = {};
2477  if (!children) {
2478    return slots
2479  }
2480  for (var i = 0, l = children.length; i < l; i++) {
2481    var child = children[i];
2482    var data = child.data;
2483    // remove slot attribute if the node is resolved as a Vue slot node
2484    if (data && data.attrs && data.attrs.slot) {
2485      delete data.attrs.slot;
2486    }
2487    // named slots should only be respected if the vnode was rendered in the
2488    // same context.
2489    if ((child.context === context || child.functionalContext === context) &&
2490      data && data.slot != null
2491    ) {
2492      var name = child.data.slot;
2493      var slot = (slots[name] || (slots[name] = []));
2494      if (child.tag === 'template') {
2495        slot.push.apply(slot, child.children);
2496      } else {
2497        slot.push(child);
2498      }
2499    } else {
2500      (slots.default || (slots.default = [])).push(child);
2501    }
2502  }
2503  // ignore slots that contains only whitespace
2504  for (var name$1 in slots) {
2505    if (slots[name$1].every(isWhitespace)) {
2506      delete slots[name$1];
2507    }
2508  }
2509  return slots
2510}
2511
2512function isWhitespace (node) {
2513  return node.isComment || node.text === ' '
2514}
2515
2516function resolveScopedSlots (
2517  fns, // see flow/vnode
2518  res
2519) {
2520  res = res || {};
2521  for (var i = 0; i < fns.length; i++) {
2522    if (Array.isArray(fns[i])) {
2523      resolveScopedSlots(fns[i], res);
2524    } else {
2525      res[fns[i].key] = fns[i].fn;
2526    }
2527  }
2528  return res
2529}
2530
2531/*  */
2532
2533var activeInstance = null;
2534var isUpdatingChildComponent = false;
2535
2536function initLifecycle (vm) {
2537  var options = vm.$options;
2538
2539  // locate first non-abstract parent
2540  var parent = options.parent;
2541  if (parent && !options.abstract) {
2542    while (parent.$options.abstract && parent.$parent) {
2543      parent = parent.$parent;
2544    }
2545    parent.$children.push(vm);
2546  }
2547
2548  vm.$parent = parent;
2549  vm.$root = parent ? parent.$root : vm;
2550
2551  vm.$children = [];
2552  vm.$refs = {};
2553
2554  vm._watcher = null;
2555  vm._inactive = null;
2556  vm._directInactive = false;
2557  vm._isMounted = false;
2558  vm._isDestroyed = false;
2559  vm._isBeingDestroyed = false;
2560}
2561
2562function lifecycleMixin (Vue) {
2563  Vue.prototype._update = function (vnode, hydrating) {
2564    var vm = this;
2565    if (vm._isMounted) {
2566      callHook(vm, 'beforeUpdate');
2567    }
2568    var prevEl = vm.$el;
2569    var prevVnode = vm._vnode;
2570    var prevActiveInstance = activeInstance;
2571    activeInstance = vm;
2572    vm._vnode = vnode;
2573    // Vue.prototype.__patch__ is injected in entry points
2574    // based on the rendering backend used.
2575    if (!prevVnode) {
2576      // initial render
2577      vm.$el = vm.__patch__(
2578        vm.$el, vnode, hydrating, false /* removeOnly */,
2579        vm.$options._parentElm,
2580        vm.$options._refElm
2581      );
2582      // no need for the ref nodes after initial patch
2583      // this prevents keeping a detached DOM tree in memory (#5851)
2584      vm.$options._parentElm = vm.$options._refElm = null;
2585    } else {
2586      // updates
2587      vm.$el = vm.__patch__(prevVnode, vnode);
2588    }
2589    activeInstance = prevActiveInstance;
2590    // update __vue__ reference
2591    if (prevEl) {
2592      prevEl.__vue__ = null;
2593    }
2594    if (vm.$el) {
2595      vm.$el.__vue__ = vm;
2596    }
2597    // if parent is an HOC, update its $el as well
2598    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
2599      vm.$parent.$el = vm.$el;
2600    }
2601    // updated hook is called by the scheduler to ensure that children are
2602    // updated in a parent's updated hook.
2603  };
2604
2605  Vue.prototype.$forceUpdate = function () {
2606    var vm = this;
2607    if (vm._watcher) {
2608      vm._watcher.update();
2609    }
2610  };
2611
2612  Vue.prototype.$destroy = function () {
2613    var vm = this;
2614    if (vm._isBeingDestroyed) {
2615      return
2616    }
2617    callHook(vm, 'beforeDestroy');
2618    vm._isBeingDestroyed = true;
2619    // remove self from parent
2620    var parent = vm.$parent;
2621    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
2622      remove(parent.$children, vm);
2623    }
2624    // teardown watchers
2625    if (vm._watcher) {
2626      vm._watcher.teardown();
2627    }
2628    var i = vm._watchers.length;
2629    while (i--) {
2630      vm._watchers[i].teardown();
2631    }
2632    // remove reference from data ob
2633    // frozen object may not have observer.
2634    if (vm._data.__ob__) {
2635      vm._data.__ob__.vmCount--;
2636    }
2637    // call the last hook...
2638    vm._isDestroyed = true;
2639    // invoke destroy hooks on current rendered tree
2640    vm.__patch__(vm._vnode, null);
2641    // fire destroyed hook
2642    callHook(vm, 'destroyed');
2643    // turn off all instance listeners.
2644    vm.$off();
2645    // remove __vue__ reference
2646    if (vm.$el) {
2647      vm.$el.__vue__ = null;
2648    }
2649    // release circular reference (#6759)
2650    if (vm.$vnode) {
2651      vm.$vnode.parent = null;
2652    }
2653  };
2654}
2655
2656function mountComponent (
2657  vm,
2658  el,
2659  hydrating
2660) {
2661  vm.$el = el;
2662  if (!vm.$options.render) {
2663    vm.$options.render = createEmptyVNode;
2664    {
2665      /* istanbul ignore if */
2666      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
2667        vm.$options.el || el) {
2668        warn(
2669          'You are using the runtime-only build of Vue where the template ' +
2670          'compiler is not available. Either pre-compile the templates into ' +
2671          'render functions, or use the compiler-included build.',
2672          vm
2673        );
2674      } else {
2675        warn(
2676          'Failed to mount component: template or render function not defined.',
2677          vm
2678        );
2679      }
2680    }
2681  }
2682  callHook(vm, 'beforeMount');
2683
2684  var updateComponent;
2685  /* istanbul ignore if */
2686  if ("development" !== 'production' && config.performance && mark) {
2687    updateComponent = function () {
2688      var name = vm._name;
2689      var id = vm._uid;
2690      var startTag = "vue-perf-start:" + id;
2691      var endTag = "vue-perf-end:" + id;
2692
2693      mark(startTag);
2694      var vnode = vm._render();
2695      mark(endTag);
2696      measure(("vue " + name + " render"), startTag, endTag);
2697
2698      mark(startTag);
2699      vm._update(vnode, hydrating);
2700      mark(endTag);
2701      measure(("vue " + name + " patch"), startTag, endTag);
2702    };
2703  } else {
2704    updateComponent = function () {
2705      vm._update(vm._render(), hydrating);
2706    };
2707  }
2708
2709  vm._watcher = new Watcher(vm, updateComponent, noop);
2710  hydrating = false;
2711
2712  // manually mounted instance, call mounted on self
2713  // mounted is called for render-created child components in its inserted hook
2714  if (vm.$vnode == null) {
2715    vm._isMounted = true;
2716    callHook(vm, 'mounted');
2717  }
2718  return vm
2719}
2720
2721function updateChildComponent (
2722  vm,
2723  propsData,
2724  listeners,
2725  parentVnode,
2726  renderChildren
2727) {
2728  {
2729    isUpdatingChildComponent = true;
2730  }
2731
2732  // determine whether component has slot children
2733  // we need to do this before overwriting $options._renderChildren
2734  var hasChildren = !!(
2735    renderChildren ||               // has new static slots
2736    vm.$options._renderChildren ||  // has old static slots
2737    parentVnode.data.scopedSlots || // has new scoped slots
2738    vm.$scopedSlots !== emptyObject // has old scoped slots
2739  );
2740
2741  vm.$options._parentVnode = parentVnode;
2742  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
2743
2744  if (vm._vnode) { // update child tree's parent
2745    vm._vnode.parent = parentVnode;
2746  }
2747  vm.$options._renderChildren = renderChildren;
2748
2749  // update $attrs and $listeners hash
2750  // these are also reactive so they may trigger child update if the child
2751  // used them during render
2752  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
2753  vm.$listeners = listeners || emptyObject;
2754
2755  // update props
2756  if (propsData && vm.$options.props) {
2757    observerState.shouldConvert = false;
2758    var props = vm._props;
2759    var propKeys = vm.$options._propKeys || [];
2760    for (var i = 0; i < propKeys.length; i++) {
2761      var key = propKeys[i];
2762      props[key] = validateProp(key, vm.$options.props, propsData, vm);
2763    }
2764    observerState.shouldConvert = true;
2765    // keep a copy of raw propsData
2766    vm.$options.propsData = propsData;
2767  }
2768
2769  // update listeners
2770  if (listeners) {
2771    var oldListeners = vm.$options._parentListeners;
2772    vm.$options._parentListeners = listeners;
2773    updateComponentListeners(vm, listeners, oldListeners);
2774  }
2775  // resolve slots + force update if has children
2776  if (hasChildren) {
2777    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
2778    vm.$forceUpdate();
2779  }
2780
2781  {
2782    isUpdatingChildComponent = false;
2783  }
2784}
2785
2786function isInInactiveTree (vm) {
2787  while (vm && (vm = vm.$parent)) {
2788    if (vm._inactive) { return true }
2789  }
2790  return false
2791}
2792
2793function activateChildComponent (vm, direct) {
2794  if (direct) {
2795    vm._directInactive = false;
2796    if (isInInactiveTree(vm)) {
2797      return
2798    }
2799  } else if (vm._directInactive) {
2800    return
2801  }
2802  if (vm._inactive || vm._inactive === null) {
2803    vm._inactive = false;
2804    for (var i = 0; i < vm.$children.length; i++) {
2805      activateChildComponent(vm.$children[i]);
2806    }
2807    callHook(vm, 'activated');
2808  }
2809}
2810
2811function deactivateChildComponent (vm, direct) {
2812  if (direct) {
2813    vm._directInactive = true;
2814    if (isInInactiveTree(vm)) {
2815      return
2816    }
2817  }
2818  if (!vm._inactive) {
2819    vm._inactive = true;
2820    for (var i = 0; i < vm.$children.length; i++) {
2821      deactivateChildComponent(vm.$children[i]);
2822    }
2823    callHook(vm, 'deactivated');
2824  }
2825}
2826
2827function callHook (vm, hook) {
2828  var handlers = vm.$options[hook];
2829  if (handlers) {
2830    for (var i = 0, j = handlers.length; i < j; i++) {
2831      try {
2832        handlers[i].call(vm);
2833      } catch (e) {
2834        handleError(e, vm, (hook + " hook"));
2835      }
2836    }
2837  }
2838  if (vm._hasHookEvent) {
2839    vm.$emit('hook:' + hook);
2840  }
2841}
2842
2843/*  */
2844
2845
2846var MAX_UPDATE_COUNT = 100;
2847
2848var queue = [];
2849var activatedChildren = [];
2850var has = {};
2851var circular = {};
2852var waiting = false;
2853var flushing = false;
2854var index = 0;
2855
2856/**
2857 * Reset the scheduler's state.
2858 */
2859function resetSchedulerState () {
2860  index = queue.length = activatedChildren.length = 0;
2861  has = {};
2862  {
2863    circular = {};
2864  }
2865  waiting = flushing = false;
2866}
2867
2868/**
2869 * Flush both queues and run the watchers.
2870 */
2871function flushSchedulerQueue () {
2872  flushing = true;
2873  var watcher, id;
2874
2875  // Sort queue before flush.
2876  // This ensures that:
2877  // 1. Components are updated from parent to child. (because parent is always
2878  //    created before the child)
2879  // 2. A component's user watchers are run before its render watcher (because
2880  //    user watchers are created before the render watcher)
2881  // 3. If a component is destroyed during a parent component's watcher run,
2882  //    its watchers can be skipped.
2883  queue.sort(function (a, b) { return a.id - b.id; });
2884
2885  // do not cache length because more watchers might be pushed
2886  // as we run existing watchers
2887  for (index = 0; index < queue.length; index++) {
2888    watcher = queue[index];
2889    id = watcher.id;
2890    has[id] = null;
2891    watcher.run();
2892    // in dev build, check and stop circular updates.
2893    if ("development" !== 'production' && has[id] != null) {
2894      circular[id] = (circular[id] || 0) + 1;
2895      if (circular[id] > MAX_UPDATE_COUNT) {
2896        warn(
2897          'You may have an infinite update loop ' + (
2898            watcher.user
2899              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
2900              : "in a component render function."
2901          ),
2902          watcher.vm
2903        );
2904        break
2905      }
2906    }
2907  }
2908
2909  // keep copies of post queues before resetting state
2910  var activatedQueue = activatedChildren.slice();
2911  var updatedQueue = queue.slice();
2912
2913  resetSchedulerState();
2914
2915  // call component updated and activated hooks
2916  callActivatedHooks(activatedQueue);
2917  callUpdatedHooks(updatedQueue);
2918
2919  // devtool hook
2920  /* istanbul ignore if */
2921  if (devtools && config.devtools) {
2922    devtools.emit('flush');
2923  }
2924}
2925
2926function callUpdatedHooks (queue) {
2927  var i = queue.length;
2928  while (i--) {
2929    var watcher = queue[i];
2930    var vm = watcher.vm;
2931    if (vm._watcher === watcher && vm._isMounted) {
2932      callHook(vm, 'updated');
2933    }
2934  }
2935}
2936
2937/**
2938 * Queue a kept-alive component that was activated during patch.
2939 * The queue will be processed after the entire tree has been patched.
2940 */
2941function queueActivatedComponent (vm) {
2942  // setting _inactive to false here so that a render function can
2943  // rely on checking whether it's in an inactive tree (e.g. router-view)
2944  vm._inactive = false;
2945  activatedChildren.push(vm);
2946}
2947
2948function callActivatedHooks (queue) {
2949  for (var i = 0; i < queue.length; i++) {
2950    queue[i]._inactive = true;
2951    activateChildComponent(queue[i], true /* true */);
2952  }
2953}
2954
2955/**
2956 * Push a watcher into the watcher queue.
2957 * Jobs with duplicate IDs will be skipped unless it's
2958 * pushed when the queue is being flushed.
2959 */
2960function queueWatcher (watcher) {
2961  var id = watcher.id;
2962  if (has[id] == null) {
2963    has[id] = true;
2964    if (!flushing) {
2965      queue.push(watcher);
2966    } else {
2967      // if already flushing, splice the watcher based on its id
2968      // if already past its id, it will be run next immediately.
2969      var i = queue.length - 1;
2970      while (i > index && queue[i].id > watcher.id) {
2971        i--;
2972      }
2973      queue.splice(i + 1, 0, watcher);
2974    }
2975    // queue the flush
2976    if (!waiting) {
2977      waiting = true;
2978      nextTick(flushSchedulerQueue);
2979    }
2980  }
2981}
2982
2983/*  */
2984
2985var uid$2 = 0;
2986
2987/**
2988 * A watcher parses an expression, collects dependencies,
2989 * and fires callback when the expression value changes.
2990 * This is used for both the $watch() api and directives.
2991 */
2992var Watcher = function Watcher (
2993  vm,
2994  expOrFn,
2995  cb,
2996  options
2997) {
2998  this.vm = vm;
2999  vm._watchers.push(this);
3000  // options
3001  if (options) {
3002    this.deep = !!options.deep;
3003    this.user = !!options.user;
3004    this.lazy = !!options.lazy;
3005    this.sync = !!options.sync;
3006  } else {
3007    this.deep = this.user = this.lazy = this.sync = false;
3008  }
3009  this.cb = cb;
3010  this.id = ++uid$2; // uid for batching
3011  this.active = true;
3012  this.dirty = this.lazy; // for lazy watchers
3013  this.deps = [];
3014  this.newDeps = [];
3015  this.depIds = new _Set();
3016  this.newDepIds = new _Set();
3017  this.expression = expOrFn.toString();
3018  // parse expression for getter
3019  if (typeof expOrFn === 'function') {
3020    this.getter = expOrFn;
3021  } else {
3022    this.getter = parsePath(expOrFn);
3023    if (!this.getter) {
3024      this.getter = function () {};
3025      "development" !== 'production' && warn(
3026        "Failed watching path: \"" + expOrFn + "\" " +
3027        'Watcher only accepts simple dot-delimited paths. ' +
3028        'For full control, use a function instead.',
3029        vm
3030      );
3031    }
3032  }
3033  this.value = this.lazy
3034    ? undefined
3035    : this.get();
3036};
3037
3038/**
3039 * Evaluate the getter, and re-collect dependencies.
3040 */
3041Watcher.prototype.get = function get () {
3042  pushTarget(this);
3043  var value;
3044  var vm = this.vm;
3045  try {
3046    value = this.getter.call(vm, vm);
3047  } catch (e) {
3048    if (this.user) {
3049      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
3050    } else {
3051      throw e
3052    }
3053  } finally {
3054    // "touch" every property so they are all tracked as
3055    // dependencies for deep watching
3056    if (this.deep) {
3057      traverse(value);
3058    }
3059    popTarget();
3060    this.cleanupDeps();
3061  }
3062  return value
3063};
3064
3065/**
3066 * Add a dependency to this directive.
3067 */
3068Watcher.prototype.addDep = function addDep (dep) {
3069  var id = dep.id;
3070  if (!this.newDepIds.has(id)) {
3071    this.newDepIds.add(id);
3072    this.newDeps.push(dep);
3073    if (!this.depIds.has(id)) {
3074      dep.addSub(this);
3075    }
3076  }
3077};
3078
3079/**
3080 * Clean up for dependency collection.
3081 */
3082Watcher.prototype.cleanupDeps = function cleanupDeps () {
3083    var this$1 = this;
3084
3085  var i = this.deps.length;
3086  while (i--) {
3087    var dep = this$1.deps[i];
3088    if (!this$1.newDepIds.has(dep.id)) {
3089      dep.removeSub(this$1);
3090    }
3091  }
3092  var tmp = this.depIds;
3093  this.depIds = this.newDepIds;
3094  this.newDepIds = tmp;
3095  this.newDepIds.clear();
3096  tmp = this.deps;
3097  this.deps = this.newDeps;
3098  this.newDeps = tmp;
3099  this.newDeps.length = 0;
3100};
3101
3102/**
3103 * Subscriber interface.
3104 * Will be called when a dependency changes.
3105 */
3106Watcher.prototype.update = function update () {
3107  /* istanbul ignore else */
3108  if (this.lazy) {
3109    this.dirty = true;
3110  } else if (this.sync) {
3111    this.run();
3112  } else {
3113    queueWatcher(this);
3114  }
3115};
3116
3117/**
3118 * Scheduler job interface.
3119 * Will be called by the scheduler.
3120 */
3121Watcher.prototype.run = function run () {
3122  if (this.active) {
3123    var value = this.get();
3124    if (
3125      value !== this.value ||
3126      // Deep watchers and watchers on Object/Arrays should fire even
3127      // when the value is the same, because the value may
3128      // have mutated.
3129      isObject(value) ||
3130      this.deep
3131    ) {
3132      // set new value
3133      var oldValue = this.value;
3134      this.value = value;
3135      if (this.user) {
3136        try {
3137          this.cb.call(this.vm, value, oldValue);
3138        } catch (e) {
3139          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
3140        }
3141      } else {
3142        this.cb.call(this.vm, value, oldValue);
3143      }
3144    }
3145  }
3146};
3147
3148/**
3149 * Evaluate the value of the watcher.
3150 * This only gets called for lazy watchers.
3151 */
3152Watcher.prototype.evaluate = function evaluate () {
3153  this.value = this.get();
3154  this.dirty = false;
3155};
3156
3157/**
3158 * Depend on all deps collected by this watcher.
3159 */
3160Watcher.prototype.depend = function depend () {
3161    var this$1 = this;
3162
3163  var i = this.deps.length;
3164  while (i--) {
3165    this$1.deps[i].depend();
3166  }
3167};
3168
3169/**
3170 * Remove self from all dependencies' subscriber list.
3171 */
3172Watcher.prototype.teardown = function teardown () {
3173    var this$1 = this;
3174
3175  if (this.active) {
3176    // remove self from vm's watcher list
3177    // this is a somewhat expensive operation so we skip it
3178    // if the vm is being destroyed.
3179    if (!this.vm._isBeingDestroyed) {
3180      remove(this.vm._watchers, this);
3181    }
3182    var i = this.deps.length;
3183    while (i--) {
3184      this$1.deps[i].removeSub(this$1);
3185    }
3186    this.active = false;
3187  }
3188};
3189
3190/**
3191 * Recursively traverse an object to evoke all converted
3192 * getters, so that every nested property inside the object
3193 * is collected as a "deep" dependency.
3194 */
3195var seenObjects = new _Set();
3196function traverse (val) {
3197  seenObjects.clear();
3198  _traverse(val, seenObjects);
3199}
3200
3201function _traverse (val, seen) {
3202  var i, keys;
3203  var isA = Array.isArray(val);
3204  if ((!isA && !isObject(val)) || !Object.isExtensible(val)) {
3205    return
3206  }
3207  if (val.__ob__) {
3208    var depId = val.__ob__.dep.id;
3209    if (seen.has(depId)) {
3210      return
3211    }
3212    seen.add(depId);
3213  }
3214  if (isA) {
3215    i = val.length;
3216    while (i--) { _traverse(val[i], seen); }
3217  } else {
3218    keys = Object.keys(val);
3219    i = keys.length;
3220    while (i--) { _traverse(val[keys[i]], seen); }
3221  }
3222}
3223
3224/*  */
3225
3226var sharedPropertyDefinition = {
3227  enumerable: true,
3228  configurable: true,
3229  get: noop,
3230  set: noop
3231};
3232
3233function proxy (target, sourceKey, key) {
3234  sharedPropertyDefinition.get = function proxyGetter () {
3235    return this[sourceKey][key]
3236  };
3237  sharedPropertyDefinition.set = function proxySetter (val) {
3238    this[sourceKey][key] = val;
3239  };
3240  Object.defineProperty(target, key, sharedPropertyDefinition);
3241}
3242
3243function initState (vm) {
3244  vm._watchers = [];
3245  var opts = vm.$options;
3246  if (opts.props) { initProps(vm, opts.props); }
3247  if (opts.methods) { initMethods(vm, opts.methods); }
3248  if (opts.data) {
3249    initData(vm);
3250  } else {
3251    observe(vm._data = {}, true /* asRootData */);
3252  }
3253  if (opts.computed) { initComputed(vm, opts.computed); }
3254  if (opts.watch && opts.watch !== nativeWatch) {
3255    initWatch(vm, opts.watch);
3256  }
3257}
3258
3259function initProps (vm, propsOptions) {
3260  var propsData = vm.$options.propsData || {};
3261  var props = vm._props = {};
3262  // cache prop keys so that future props updates can iterate using Array
3263  // instead of dynamic object key enumeration.
3264  var keys = vm.$options._propKeys = [];
3265  var isRoot = !vm.$parent;
3266  // root instance props should be converted
3267  observerState.shouldConvert = isRoot;
3268  var loop = function ( key ) {
3269    keys.push(key);
3270    var value = validateProp(key, propsOptions, propsData, vm);
3271    /* istanbul ignore else */
3272    {
3273      var hyphenatedKey = hyphenate(key);
3274      if (isReservedAttribute(hyphenatedKey) ||
3275          config.isReservedAttr(hyphenatedKey)) {
3276        warn(
3277          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
3278          vm
3279        );
3280      }
3281      defineReactive(props, key, value, function () {
3282        if (vm.$parent && !isUpdatingChildComponent) {
3283          warn(
3284            "Avoid mutating a prop directly since the value will be " +
3285            "overwritten whenever the parent component re-renders. " +
3286            "Instead, use a data or computed property based on the prop's " +
3287            "value. Prop being mutated: \"" + key + "\"",
3288            vm
3289          );
3290        }
3291      });
3292    }
3293    // static props are already proxied on the component's prototype
3294    // during Vue.extend(). We only need to proxy props defined at
3295    // instantiation here.
3296    if (!(key in vm)) {
3297      proxy(vm, "_props", key);
3298    }
3299  };
3300
3301  for (var key in propsOptions) loop( key );
3302  observerState.shouldConvert = true;
3303}
3304
3305function initData (vm) {
3306  var data = vm.$options.data;
3307  data = vm._data = typeof data === 'function'
3308    ? getData(data, vm)
3309    : data || {};
3310  if (!isPlainObject(data)) {
3311    data = {};
3312    "development" !== 'production' && warn(
3313      'data functions should return an object:\n' +
3314      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
3315      vm
3316    );
3317  }
3318  // proxy data on instance
3319  var keys = Object.keys(data);
3320  var props = vm.$options.props;
3321  var methods = vm.$options.methods;
3322  var i = keys.length;
3323  while (i--) {
3324    var key = keys[i];
3325    {
3326      if (methods && hasOwn(methods, key)) {
3327        warn(
3328          ("Method \"" + key + "\" has already been defined as a data property."),
3329          vm
3330        );
3331      }
3332    }
3333    if (props && hasOwn(props, key)) {
3334      "development" !== 'production' && warn(
3335        "The data property \"" + key + "\" is already declared as a prop. " +
3336        "Use prop default value instead.",
3337        vm
3338      );
3339    } else if (!isReserved(key)) {
3340      proxy(vm, "_data", key);
3341    }
3342  }
3343  // observe data
3344  observe(data, true /* asRootData */);
3345}
3346
3347function getData (data, vm) {
3348  try {
3349    return data.call(vm, vm)
3350  } catch (e) {
3351    handleError(e, vm, "data()");
3352    return {}
3353  }
3354}
3355
3356var computedWatcherOptions = { lazy: true };
3357
3358function initComputed (vm, computed) {
3359  var watchers = vm._computedWatchers = Object.create(null);
3360  // computed properties are just getters during SSR
3361  var isSSR = isServerRendering();
3362
3363  for (var key in computed) {
3364    var userDef = computed[key];
3365    var getter = typeof userDef === 'function' ? userDef : userDef.get;
3366    if ("development" !== 'production' && getter == null) {
3367      warn(
3368        ("Getter is missing for computed property \"" + key + "\"."),
3369        vm
3370      );
3371    }
3372
3373    if (!isSSR) {
3374      // create internal watcher for the computed property.
3375      watchers[key] = new Watcher(
3376        vm,
3377        getter || noop,
3378        noop,
3379        computedWatcherOptions
3380      );
3381    }
3382
3383    // component-defined computed properties are already defined on the
3384    // component prototype. We only need to define computed properties defined
3385    // at instantiation here.
3386    if (!(key in vm)) {
3387      defineComputed(vm, key, userDef);
3388    } else {
3389      if (key in vm.$data) {
3390        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
3391      } else if (vm.$options.props && key in vm.$options.props) {
3392        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
3393      }
3394    }
3395  }
3396}
3397
3398function defineComputed (
3399  target,
3400  key,
3401  userDef
3402) {
3403  var shouldCache = !isServerRendering();
3404  if (typeof userDef === 'function') {
3405    sharedPropertyDefinition.get = shouldCache
3406      ? createComputedGetter(key)
3407      : userDef;
3408    sharedPropertyDefinition.set = noop;
3409  } else {
3410    sharedPropertyDefinition.get = userDef.get
3411      ? shouldCache && userDef.cache !== false
3412        ? createComputedGetter(key)
3413        : userDef.get
3414      : noop;
3415    sharedPropertyDefinition.set = userDef.set
3416      ? userDef.set
3417      : noop;
3418  }
3419  if ("development" !== 'production' &&
3420      sharedPropertyDefinition.set === noop) {
3421    sharedPropertyDefinition.set = function () {
3422      warn(
3423        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
3424        this
3425      );
3426    };
3427  }
3428  Object.defineProperty(target, key, sharedPropertyDefinition);
3429}
3430
3431function createComputedGetter (key) {
3432  return function computedGetter () {
3433    var watcher = this._computedWatchers && this._computedWatchers[key];
3434    if (watcher) {
3435      if (watcher.dirty) {
3436        watcher.evaluate();
3437      }
3438      if (Dep.target) {
3439        watcher.depend();
3440      }
3441      return watcher.value
3442    }
3443  }
3444}
3445
3446function initMethods (vm, methods) {
3447  var props = vm.$options.props;
3448  for (var key in methods) {
3449    {
3450      if (methods[key] == null) {
3451        warn(
3452          "Method \"" + key + "\" has an undefined value in the component definition. " +
3453          "Did you reference the function correctly?",
3454          vm
3455        );
3456      }
3457      if (props && hasOwn(props, key)) {
3458        warn(
3459          ("Method \"" + key + "\" has already been defined as a prop."),
3460          vm
3461        );
3462      }
3463      if ((key in vm) && isReserved(key)) {
3464        warn(
3465          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
3466          "Avoid defining component methods that start with _ or $."
3467        );
3468      }
3469    }
3470    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
3471  }
3472}
3473
3474function initWatch (vm, watch) {
3475  for (var key in watch) {
3476    var handler = watch[key];
3477    if (Array.isArray(handler)) {
3478      for (var i = 0; i < handler.length; i++) {
3479        createWatcher(vm, key, handler[i]);
3480      }
3481    } else {
3482      createWatcher(vm, key, handler);
3483    }
3484  }
3485}
3486
3487function createWatcher (
3488  vm,
3489  keyOrFn,
3490  handler,
3491  options
3492) {
3493  if (isPlainObject(handler)) {
3494    options = handler;
3495    handler = handler.handler;
3496  }
3497  if (typeof handler === 'string') {
3498    handler = vm[handler];
3499  }
3500  return vm.$watch(keyOrFn, handler, options)
3501}
3502
3503function stateMixin (Vue) {
3504  // flow somehow has problems with directly declared definition object
3505  // when using Object.defineProperty, so we have to procedurally build up
3506  // the object here.
3507  var dataDef = {};
3508  dataDef.get = function () { return this._data };
3509  var propsDef = {};
3510  propsDef.get = function () { return this._props };
3511  {
3512    dataDef.set = function (newData) {
3513      warn(
3514        'Avoid replacing instance root $data. ' +
3515        'Use nested data properties instead.',
3516        this
3517      );
3518    };
3519    propsDef.set = function () {
3520      warn("$props is readonly.", this);
3521    };
3522  }
3523  Object.defineProperty(Vue.prototype, '$data', dataDef);
3524  Object.defineProperty(Vue.prototype, '$props', propsDef);
3525
3526  Vue.prototype.$set = set;
3527  Vue.prototype.$delete = del;
3528
3529  Vue.prototype.$watch = function (
3530    expOrFn,
3531    cb,
3532    options
3533  ) {
3534    var vm = this;
3535    if (isPlainObject(cb)) {
3536      return createWatcher(vm, expOrFn, cb, options)
3537    }
3538    options = options || {};
3539    options.user = true;
3540    var watcher = new Watcher(vm, expOrFn, cb, options);
3541    if (options.immediate) {
3542      cb.call(vm, watcher.value);
3543    }
3544    return function unwatchFn () {
3545      watcher.teardown();
3546    }
3547  };
3548}
3549
3550/*  */
3551
3552function initProvide (vm) {
3553  var provide = vm.$options.provide;
3554  if (provide) {
3555    vm._provided = typeof provide === 'function'
3556      ? provide.call(vm)
3557      : provide;
3558  }
3559}
3560
3561function initInjections (vm) {
3562  var result = resolveInject(vm.$options.inject, vm);
3563  if (result) {
3564    observerState.shouldConvert = false;
3565    Object.keys(result).forEach(function (key) {
3566      /* istanbul ignore else */
3567      {
3568        defineReactive(vm, key, result[key], function () {
3569          warn(
3570            "Avoid mutating an injected value directly since the changes will be " +
3571            "overwritten whenever the provided component re-renders. " +
3572            "injection being mutated: \"" + key + "\"",
3573            vm
3574          );
3575        });
3576      }
3577    });
3578    observerState.shouldConvert = true;
3579  }
3580}
3581
3582function resolveInject (inject, vm) {
3583  if (inject) {
3584    // inject is :any because flow is not smart enough to figure out cached
3585    var result = Object.create(null);
3586    var keys = hasSymbol
3587        ? Reflect.ownKeys(inject).filter(function (key) {
3588          /* istanbul ignore next */
3589          return Object.getOwnPropertyDescriptor(inject, key).enumerable
3590        })
3591        : Object.keys(inject);
3592
3593    for (var i = 0; i < keys.length; i++) {
3594      var key = keys[i];
3595      var provideKey = inject[key].from;
3596      var source = vm;
3597      while (source) {
3598        if (source._provided && provideKey in source._provided) {
3599          result[key] = source._provided[provideKey];
3600          break
3601        }
3602        source = source.$parent;
3603      }
3604      if (!source) {
3605        if ('default' in inject[key]) {
3606          var provideDefault = inject[key].default;
3607          result[key] = typeof provideDefault === 'function'
3608            ? provideDefault.call(vm)
3609            : provideDefault;
3610        } else {
3611          warn(("Injection \"" + key + "\" not found"), vm);
3612        }
3613      }
3614    }
3615    return result
3616  }
3617}
3618
3619/*  */
3620
3621/**
3622 * Runtime helper for rendering v-for lists.
3623 */
3624function renderList (
3625  val,
3626  render
3627) {
3628  var ret, i, l, keys, key;
3629  if (Array.isArray(val) || typeof val === 'string') {
3630    ret = new Array(val.length);
3631    for (i = 0, l = val.length; i < l; i++) {
3632      ret[i] = render(val[i], i);
3633    }
3634  } else if (typeof val === 'number') {
3635    ret = new Array(val);
3636    for (i = 0; i < val; i++) {
3637      ret[i] = render(i + 1, i);
3638    }
3639  } else if (isObject(val)) {
3640    keys = Object.keys(val);
3641    ret = new Array(keys.length);
3642    for (i = 0, l = keys.length; i < l; i++) {
3643      key = keys[i];
3644      ret[i] = render(val[key], key, i);
3645    }
3646  }
3647  if (isDef(ret)) {
3648    (ret)._isVList = true;
3649  }
3650  return ret
3651}
3652
3653/*  */
3654
3655/**
3656 * Runtime helper for rendering <slot>
3657 */
3658function renderSlot (
3659  name,
3660  fallback,
3661  props,
3662  bindObject
3663) {
3664  var scopedSlotFn = this.$scopedSlots[name];
3665  var nodes;
3666  if (scopedSlotFn) { // scoped slot
3667    props = props || {};
3668    if (bindObject) {
3669      if ("development" !== 'production' && !isObject(bindObject)) {
3670        warn(
3671          'slot v-bind without argument expects an Object',
3672          this
3673        );
3674      }
3675      props = extend(extend({}, bindObject), props);
3676    }
3677    nodes = scopedSlotFn(props) || fallback;
3678  } else {
3679    var slotNodes = this.$slots[name];
3680    // warn duplicate slot usage
3681    if (slotNodes) {
3682      if ("development" !== 'production' && slotNodes._rendered) {
3683        warn(
3684          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
3685          "- this will likely cause render errors.",
3686          this
3687        );
3688      }
3689      slotNodes._rendered = true;
3690    }
3691    nodes = slotNodes || fallback;
3692  }
3693
3694  var target = props && props.slot;
3695  if (target) {
3696    return this.$createElement('template', { slot: target }, nodes)
3697  } else {
3698    return nodes
3699  }
3700}
3701
3702/*  */
3703
3704/**
3705 * Runtime helper for resolving filters
3706 */
3707function resolveFilter (id) {
3708  return resolveAsset(this.$options, 'filters', id, true) || identity
3709}
3710
3711/*  */
3712
3713/**
3714 * Runtime helper for checking keyCodes from config.
3715 * exposed as Vue.prototype._k
3716 * passing in eventKeyName as last argument separately for backwards compat
3717 */
3718function checkKeyCodes (
3719  eventKeyCode,
3720  key,
3721  builtInAlias,
3722  eventKeyName
3723) {
3724  var keyCodes = config.keyCodes[key] || builtInAlias;
3725  if (keyCodes) {
3726    if (Array.isArray(keyCodes)) {
3727      return keyCodes.indexOf(eventKeyCode) === -1
3728    } else {
3729      return keyCodes !== eventKeyCode
3730    }
3731  } else if (eventKeyName) {
3732    return hyphenate(eventKeyName) !== key
3733  }
3734}
3735
3736/*  */
3737
3738/**
3739 * Runtime helper for merging v-bind="object" into a VNode's data.
3740 */
3741function bindObjectProps (
3742  data,
3743  tag,
3744  value,
3745  asProp,
3746  isSync
3747) {
3748  if (value) {
3749    if (!isObject(value)) {
3750      "development" !== 'production' && warn(
3751        'v-bind without argument expects an Object or Array value',
3752        this
3753      );
3754    } else {
3755      if (Array.isArray(value)) {
3756        value = toObject(value);
3757      }
3758      var hash;
3759      var loop = function ( key ) {
3760        if (
3761          key === 'class' ||
3762          key === 'style' ||
3763          isReservedAttribute(key)
3764        ) {
3765          hash = data;
3766        } else {
3767          var type = data.attrs && data.attrs.type;
3768          hash = asProp || config.mustUseProp(tag, type, key)
3769            ? data.domProps || (data.domProps = {})
3770            : data.attrs || (data.attrs = {});
3771        }
3772        if (!(key in hash)) {
3773          hash[key] = value[key];
3774
3775          if (isSync) {
3776            var on = data.on || (data.on = {});
3777            on[("update:" + key)] = function ($event) {
3778              value[key] = $event;
3779            };
3780          }
3781        }
3782      };
3783
3784      for (var key in value) loop( key );
3785    }
3786  }
3787  return data
3788}
3789
3790/*  */
3791
3792/**
3793 * Runtime helper for rendering static trees.
3794 */
3795function renderStatic (
3796  index,
3797  isInFor
3798) {
3799  // static trees can be rendered once and cached on the contructor options
3800  // so every instance shares the same cached trees
3801  var options = this.$options;
3802  var cached = options.cached || (options.cached = []);
3803  var tree = cached[index];
3804  // if has already-rendered static tree and not inside v-for,
3805  // we can reuse the same tree by doing a shallow clone.
3806  if (tree && !isInFor) {
3807    return Array.isArray(tree)
3808      ? cloneVNodes(tree)
3809      : cloneVNode(tree)
3810  }
3811  // otherwise, render a fresh tree.
3812  tree = cached[index] = options.staticRenderFns[index].call(this._renderProxy, null, this);
3813  markStatic(tree, ("__static__" + index), false);
3814  return tree
3815}
3816
3817/**
3818 * Runtime helper for v-once.
3819 * Effectively it means marking the node as static with a unique key.
3820 */
3821function markOnce (
3822  tree,
3823  index,
3824  key
3825) {
3826  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
3827  return tree
3828}
3829
3830function markStatic (
3831  tree,
3832  key,
3833  isOnce
3834) {
3835  if (Array.isArray(tree)) {
3836    for (var i = 0; i < tree.length; i++) {
3837      if (tree[i] && typeof tree[i] !== 'string') {
3838        markStaticNode(tree[i], (key + "_" + i), isOnce);
3839      }
3840    }
3841  } else {
3842    markStaticNode(tree, key, isOnce);
3843  }
3844}
3845
3846function markStaticNode (node, key, isOnce) {
3847  node.isStatic = true;
3848  node.key = key;
3849  node.isOnce = isOnce;
3850}
3851
3852/*  */
3853
3854function bindObjectListeners (data, value) {
3855  if (value) {
3856    if (!isPlainObject(value)) {
3857      "development" !== 'production' && warn(
3858        'v-on without argument expects an Object value',
3859        this
3860      );
3861    } else {
3862      var on = data.on = data.on ? extend({}, data.on) : {};
3863      for (var key in value) {
3864        var existing = on[key];
3865        var ours = value[key];
3866        on[key] = existing ? [].concat(existing, ours) : ours;
3867      }
3868    }
3869  }
3870  return data
3871}
3872
3873/*  */
3874
3875function installRenderHelpers (target) {
3876  target._o = markOnce;
3877  target._n = toNumber;
3878  target._s = toString;
3879  target._l = renderList;
3880  target._t = renderSlot;
3881  target._q = looseEqual;
3882  target._i = looseIndexOf;
3883  target._m = renderStatic;
3884  target._f = resolveFilter;
3885  target._k = checkKeyCodes;
3886  target._b = bindObjectProps;
3887  target._v = createTextVNode;
3888  target._e = createEmptyVNode;
3889  target._u = resolveScopedSlots;
3890  target._g = bindObjectListeners;
3891}
3892
3893/*  */
3894
3895function FunctionalRenderContext (
3896  data,
3897  props,
3898  children,
3899  parent,
3900  Ctor
3901) {
3902  var options = Ctor.options;
3903  this.data = data;
3904  this.props = props;
3905  this.children = children;
3906  this.parent = parent;
3907  this.listeners = data.on || emptyObject;
3908  this.injections = resolveInject(options.inject, parent);
3909  this.slots = function () { return resolveSlots(children, parent); };
3910
3911  // ensure the createElement function in functional components
3912  // gets a unique context - this is necessary for correct named slot check
3913  var contextVm = Object.create(parent);
3914  var isCompiled = isTrue(options._compiled);
3915  var needNormalization = !isCompiled;
3916
3917  // support for compiled functional template
3918  if (isCompiled) {
3919    // exposing $options for renderStatic()
3920    this.$options = options;
3921    // pre-resolve slots for renderSlot()
3922    this.$slots = this.slots();
3923    this.$scopedSlots = data.scopedSlots || emptyObject;
3924  }
3925
3926  if (options._scopeId) {
3927    this._c = function (a, b, c, d) {
3928      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
3929      if (vnode) {
3930        vnode.functionalScopeId = options._scopeId;
3931        vnode.functionalContext = parent;
3932      }
3933      return vnode
3934    };
3935  } else {
3936    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
3937  }
3938}
3939
3940installRenderHelpers(FunctionalRenderContext.prototype);
3941
3942function createFunctionalComponent (
3943  Ctor,
3944  propsData,
3945  data,
3946  contextVm,
3947  children
3948) {
3949  var options = Ctor.options;
3950  var props = {};
3951  var propOptions = options.props;
3952  if (isDef(propOptions)) {
3953    for (var key in propOptions) {
3954      props[key] = validateProp(key, propOptions, propsData || emptyObject);
3955    }
3956  } else {
3957    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
3958    if (isDef(data.props)) { mergeProps(props, data.props); }
3959  }
3960
3961  var renderContext = new FunctionalRenderContext(
3962    data,
3963    props,
3964    children,
3965    contextVm,
3966    Ctor
3967  );
3968
3969  var vnode = options.render.call(null, renderContext._c, renderContext);
3970
3971  if (vnode instanceof VNode) {
3972    vnode.functionalContext = contextVm;
3973    vnode.functionalOptions = options;
3974    if (data.slot) {
3975      (vnode.data || (vnode.data = {})).slot = data.slot;
3976    }
3977  }
3978
3979  return vnode
3980}
3981
3982function mergeProps (to, from) {
3983  for (var key in from) {
3984    to[camelize(key)] = from[key];
3985  }
3986}
3987
3988/*  */
3989
3990// hooks to be invoked on component VNodes during patch
3991var componentVNodeHooks = {
3992  init: function init (
3993    vnode,
3994    hydrating,
3995    parentElm,
3996    refElm
3997  ) {
3998    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
3999      var child = vnode.componentInstance = createComponentInstanceForVnode(
4000        vnode,
4001        activeInstance,
4002        parentElm,
4003        refElm
4004      );
4005      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
4006    } else if (vnode.data.keepAlive) {
4007      // kept-alive components, treat as a patch
4008      var mountedNode = vnode; // work around flow
4009      componentVNodeHooks.prepatch(mountedNode, mountedNode);
4010    }
4011  },
4012
4013  prepatch: function prepatch (oldVnode, vnode) {
4014    var options = vnode.componentOptions;
4015    var child = vnode.componentInstance = oldVnode.componentInstance;
4016    updateChildComponent(
4017      child,
4018      options.propsData, // updated props
4019      options.listeners, // updated listeners
4020      vnode, // new parent vnode
4021      options.children // new children
4022    );
4023  },
4024
4025  insert: function insert (vnode) {
4026    var context = vnode.context;
4027    var componentInstance = vnode.componentInstance;
4028    if (!componentInstance._isMounted) {
4029      componentInstance._isMounted = true;
4030      callHook(componentInstance, 'mounted');
4031    }
4032    if (vnode.data.keepAlive) {
4033      if (context._isMounted) {
4034        // vue-router#1212
4035        // During updates, a kept-alive component's child components may
4036        // change, so directly walking the tree here may call activated hooks
4037        // on incorrect children. Instead we push them into a queue which will
4038        // be processed after the whole patch process ended.
4039        queueActivatedComponent(componentInstance);
4040      } else {
4041        activateChildComponent(componentInstance, true /* direct */);
4042      }
4043    }
4044  },
4045
4046  destroy: function destroy (vnode) {
4047    var componentInstance = vnode.componentInstance;
4048    if (!componentInstance._isDestroyed) {
4049      if (!vnode.data.keepAlive) {
4050        componentInstance.$destroy();
4051      } else {
4052        deactivateChildComponent(componentInstance, true /* direct */);
4053      }
4054    }
4055  }
4056};
4057
4058var hooksToMerge = Object.keys(componentVNodeHooks);
4059
4060function createComponent (
4061  Ctor,
4062  data,
4063  context,
4064  children,
4065  tag
4066) {
4067  if (isUndef(Ctor)) {
4068    return
4069  }
4070
4071  var baseCtor = context.$options._base;
4072
4073  // plain options object: turn it into a constructor
4074  if (isObject(Ctor)) {
4075    Ctor = baseCtor.extend(Ctor);
4076  }
4077
4078  // if at this stage it's not a constructor or an async component factory,
4079  // reject.
4080  if (typeof Ctor !== 'function') {
4081    {
4082      warn(("Invalid Component definition: " + (String(Ctor))), context);
4083    }
4084    return
4085  }
4086
4087  // async component
4088  var asyncFactory;
4089  if (isUndef(Ctor.cid)) {
4090    asyncFactory = Ctor;
4091    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
4092    if (Ctor === undefined) {
4093      // return a placeholder node for async component, which is rendered
4094      // as a comment node but preserves all the raw information for the node.
4095      // the information will be used for async server-rendering and hydration.
4096      return createAsyncPlaceholder(
4097        asyncFactory,
4098        data,
4099        context,
4100        children,
4101        tag
4102      )
4103    }
4104  }
4105
4106  data = data || {};
4107
4108  // resolve constructor options in case global mixins are applied after
4109  // component constructor creation
4110  resolveConstructorOptions(Ctor);
4111
4112  // transform component v-model data into props & events
4113  if (isDef(data.model)) {
4114    transformModel(Ctor.options, data);
4115  }
4116
4117  // extract props
4118  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
4119
4120  // functional component
4121  if (isTrue(Ctor.options.functional)) {
4122    return createFunctionalComponent(Ctor, propsData, data, context, children)
4123  }
4124
4125  // extract listeners, since these needs to be treated as
4126  // child component listeners instead of DOM listeners
4127  var listeners = data.on;
4128  // replace with listeners with .native modifier
4129  // so it gets processed during parent component patch.
4130  data.on = data.nativeOn;
4131
4132  if (isTrue(Ctor.options.abstract)) {
4133    // abstract components do not keep anything
4134    // other than props & listeners & slot
4135
4136    // work around flow
4137    var slot = data.slot;
4138    data = {};
4139    if (slot) {
4140      data.slot = slot;
4141    }
4142  }
4143
4144  // merge component management hooks onto the placeholder node
4145  mergeHooks(data);
4146
4147  // return a placeholder vnode
4148  var name = Ctor.options.name || tag;
4149  var vnode = new VNode(
4150    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
4151    data, undefined, undefined, undefined, context,
4152    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
4153    asyncFactory
4154  );
4155  return vnode
4156}
4157
4158function createComponentInstanceForVnode (
4159  vnode, // we know it's MountedComponentVNode but flow doesn't
4160  parent, // activeInstance in lifecycle state
4161  parentElm,
4162  refElm
4163) {
4164  var vnodeComponentOptions = vnode.componentOptions;
4165  var options = {
4166    _isComponent: true,
4167    parent: parent,
4168    propsData: vnodeComponentOptions.propsData,
4169    _componentTag: vnodeComponentOptions.tag,
4170    _parentVnode: vnode,
4171    _parentListeners: vnodeComponentOptions.listeners,
4172    _renderChildren: vnodeComponentOptions.children,
4173    _parentElm: parentElm || null,
4174    _refElm: refElm || null
4175  };
4176  // check inline-template render functions
4177  var inlineTemplate = vnode.data.inlineTemplate;
4178  if (isDef(inlineTemplate)) {
4179    options.render = inlineTemplate.render;
4180    options.staticRenderFns = inlineTemplate.staticRenderFns;
4181  }
4182  return new vnodeComponentOptions.Ctor(options)
4183}
4184
4185function mergeHooks (data) {
4186  if (!data.hook) {
4187    data.hook = {};
4188  }
4189  for (var i = 0; i < hooksToMerge.length; i++) {
4190    var key = hooksToMerge[i];
4191    var fromParent = data.hook[key];
4192    var ours = componentVNodeHooks[key];
4193    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
4194  }
4195}
4196
4197function mergeHook$1 (one, two) {
4198  return function (a, b, c, d) {
4199    one(a, b, c, d);
4200    two(a, b, c, d);
4201  }
4202}
4203
4204// transform component v-model info (value and callback) into
4205// prop and event handler respectively.
4206function transformModel (options, data) {
4207  var prop = (options.model && options.model.prop) || 'value';
4208  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
4209  var on = data.on || (data.on = {});
4210  if (isDef(on[event])) {
4211    on[event] = [data.model.callback].concat(on[event]);
4212  } else {
4213    on[event] = data.model.callback;
4214  }
4215}
4216
4217/*  */
4218
4219var SIMPLE_NORMALIZE = 1;
4220var ALWAYS_NORMALIZE = 2;
4221
4222// wrapper function for providing a more flexible interface
4223// without getting yelled at by flow
4224function createElement (
4225  context,
4226  tag,
4227  data,
4228  children,
4229  normalizationType,
4230  alwaysNormalize
4231) {
4232  if (Array.isArray(data) || isPrimitive(data)) {
4233    normalizationType = children;
4234    children = data;
4235    data = undefined;
4236  }
4237  if (isTrue(alwaysNormalize)) {
4238    normalizationType = ALWAYS_NORMALIZE;
4239  }
4240  return _createElement(context, tag, data, children, normalizationType)
4241}
4242
4243function _createElement (
4244  context,
4245  tag,
4246  data,
4247  children,
4248  normalizationType
4249) {
4250  if (isDef(data) && isDef((data).__ob__)) {
4251    "development" !== 'production' && warn(
4252      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
4253      'Always create fresh vnode data objects in each render!',
4254      context
4255    );
4256    return createEmptyVNode()
4257  }
4258  // object syntax in v-bind
4259  if (isDef(data) && isDef(data.is)) {
4260    tag = data.is;
4261  }
4262  if (!tag) {
4263    // in case of component :is set to falsy value
4264    return createEmptyVNode()
4265  }
4266  // warn against non-primitive key
4267  if ("development" !== 'production' &&
4268    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
4269  ) {
4270    warn(
4271      'Avoid using non-primitive value as key, ' +
4272      'use string/number value instead.',
4273      context
4274    );
4275  }
4276  // support single function children as default scoped slot
4277  if (Array.isArray(children) &&
4278    typeof children[0] === 'function'
4279  ) {
4280    data = data || {};
4281    data.scopedSlots = { default: children[0] };
4282    children.length = 0;
4283  }
4284  if (normalizationType === ALWAYS_NORMALIZE) {
4285    children = normalizeChildren(children);
4286  } else if (normalizationType === SIMPLE_NORMALIZE) {
4287    children = simpleNormalizeChildren(children);
4288  }
4289  var vnode, ns;
4290  if (typeof tag === 'string') {
4291    var Ctor;
4292    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
4293    if (config.isReservedTag(tag)) {
4294      // platform built-in elements
4295      vnode = new VNode(
4296        config.parsePlatformTagName(tag), data, children,
4297        undefined, undefined, context
4298      );
4299    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
4300      // component
4301      vnode = createComponent(Ctor, data, context, children, tag);
4302    } else {
4303      // unknown or unlisted namespaced elements
4304      // check at runtime because it may get assigned a namespace when its
4305      // parent normalizes children
4306      vnode = new VNode(
4307        tag, data, children,
4308        undefined, undefined, context
4309      );
4310    }
4311  } else {
4312    // direct component options / constructor
4313    vnode = createComponent(tag, data, context, children);
4314  }
4315  if (isDef(vnode)) {
4316    if (ns) { applyNS(vnode, ns); }
4317    return vnode
4318  } else {
4319    return createEmptyVNode()
4320  }
4321}
4322
4323function applyNS (vnode, ns, force) {
4324  vnode.ns = ns;
4325  if (vnode.tag === 'foreignObject') {
4326    // use default namespace inside foreignObject
4327    ns = undefined;
4328    force = true;
4329  }
4330  if (isDef(vnode.children)) {
4331    for (var i = 0, l = vnode.children.length; i < l; i++) {
4332      var child = vnode.children[i];
4333      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
4334        applyNS(child, ns, force);
4335      }
4336    }
4337  }
4338}
4339
4340/*  */
4341
4342function initRender (vm) {
4343  vm._vnode = null; // the root of the child tree
4344  var options = vm.$options;
4345  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
4346  var renderContext = parentVnode && parentVnode.context;
4347  vm.$slots = resolveSlots(options._renderChildren, renderContext);
4348  vm.$scopedSlots = emptyObject;
4349  // bind the createElement fn to this instance
4350  // so that we get proper render context inside it.
4351  // args order: tag, data, children, normalizationType, alwaysNormalize
4352  // internal version is used by render functions compiled from templates
4353  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
4354  // normalization is always applied for the public version, used in
4355  // user-written render functions.
4356  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
4357
4358  // $attrs & $listeners are exposed for easier HOC creation.
4359  // they need to be reactive so that HOCs using them are always updated
4360  var parentData = parentVnode && parentVnode.data;
4361
4362  /* istanbul ignore else */
4363  {
4364    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
4365      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
4366    }, true);
4367    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
4368      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
4369    }, true);
4370  }
4371}
4372
4373function renderMixin (Vue) {
4374  // install runtime convenience helpers
4375  installRenderHelpers(Vue.prototype);
4376
4377  Vue.prototype.$nextTick = function (fn) {
4378    return nextTick(fn, this)
4379  };
4380
4381  Vue.prototype._render = function () {
4382    var vm = this;
4383    var ref = vm.$options;
4384    var render = ref.render;
4385    var _parentVnode = ref._parentVnode;
4386
4387    if (vm._isMounted) {
4388      // if the parent didn't update, the slot nodes will be the ones from
4389      // last render. They need to be cloned to ensure "freshness" for this render.
4390      for (var key in vm.$slots) {
4391        var slot = vm.$slots[key];
4392        if (slot._rendered) {
4393          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
4394        }
4395      }
4396    }
4397
4398    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
4399
4400    // set parent vnode. this allows render functions to have access
4401    // to the data on the placeholder node.
4402    vm.$vnode = _parentVnode;
4403    // render self
4404    var vnode;
4405    try {
4406      vnode = render.call(vm._renderProxy, vm.$createElement);
4407    } catch (e) {
4408      handleError(e, vm, "render");
4409      // return error render result,
4410      // or previous vnode to prevent render error causing blank component
4411      /* istanbul ignore else */
4412      {
4413        if (vm.$options.renderError) {
4414          try {
4415            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
4416          } catch (e) {
4417            handleError(e, vm, "renderError");
4418            vnode = vm._vnode;
4419          }
4420        } else {
4421          vnode = vm._vnode;
4422        }
4423      }
4424    }
4425    // return empty vnode in case the render function errored out
4426    if (!(vnode instanceof VNode)) {
4427      if ("development" !== 'production' && Array.isArray(vnode)) {
4428        warn(
4429          'Multiple root nodes returned from render function. Render function ' +
4430          'should return a single root node.',
4431          vm
4432        );
4433      }
4434      vnode = createEmptyVNode();
4435    }
4436    // set parent
4437    vnode.parent = _parentVnode;
4438    return vnode
4439  };
4440}
4441
4442/*  */
4443
4444var uid$1 = 0;
4445
4446function initMixin (Vue) {
4447  Vue.prototype._init = function (options) {
4448    var vm = this;
4449    // a uid
4450    vm._uid = uid$1++;
4451
4452    var startTag, endTag;
4453    /* istanbul ignore if */
4454    if ("development" !== 'production' && config.performance && mark) {
4455      startTag = "vue-perf-start:" + (vm._uid);
4456      endTag = "vue-perf-end:" + (vm._uid);
4457      mark(startTag);
4458    }
4459
4460    // a flag to avoid this being observed
4461    vm._isVue = true;
4462    // merge options
4463    if (options && options._isComponent) {
4464      // optimize internal component instantiation
4465      // since dynamic options merging is pretty slow, and none of the
4466      // internal component options needs special treatment.
4467      initInternalComponent(vm, options);
4468    } else {
4469      vm.$options = mergeOptions(
4470        resolveConstructorOptions(vm.constructor),
4471        options || {},
4472        vm
4473      );
4474    }
4475    /* istanbul ignore else */
4476    {
4477      initProxy(vm);
4478    }
4479    // expose real self
4480    vm._self = vm;
4481    initLifecycle(vm);
4482    initEvents(vm);
4483    initRender(vm);
4484    callHook(vm, 'beforeCreate');
4485    initInjections(vm); // resolve injections before data/props
4486    initState(vm);
4487    initProvide(vm); // resolve provide after data/props
4488    callHook(vm, 'created');
4489
4490    /* istanbul ignore if */
4491    if ("development" !== 'production' && config.performance && mark) {
4492      vm._name = formatComponentName(vm, false);
4493      mark(endTag);
4494      measure(("vue " + (vm._name) + " init"), startTag, endTag);
4495    }
4496
4497    if (vm.$options.el) {
4498      vm.$mount(vm.$options.el);
4499    }
4500  };
4501}
4502
4503function initInternalComponent (vm, options) {
4504  var opts = vm.$options = Object.create(vm.constructor.options);
4505  // doing this because it's faster than dynamic enumeration.
4506  opts.parent = options.parent;
4507  opts.propsData = options.propsData;
4508  opts._parentVnode = options._parentVnode;
4509  opts._parentListeners = options._parentListeners;
4510  opts._renderChildren = options._renderChildren;
4511  opts._componentTag = options._componentTag;
4512  opts._parentElm = options._parentElm;
4513  opts._refElm = options._refElm;
4514  if (options.render) {
4515    opts.render = options.render;
4516    opts.staticRenderFns = options.staticRenderFns;
4517  }
4518}
4519
4520function resolveConstructorOptions (Ctor) {
4521  var options = Ctor.options;
4522  if (Ctor.super) {
4523    var superOptions = resolveConstructorOptions(Ctor.super);
4524    var cachedSuperOptions = Ctor.superOptions;
4525    if (superOptions !== cachedSuperOptions) {
4526      // super option changed,
4527      // need to resolve new options.
4528      Ctor.superOptions = superOptions;
4529      // check if there are any late-modified/attached options (#4976)
4530      var modifiedOptions = resolveModifiedOptions(Ctor);
4531      // update base extend options
4532      if (modifiedOptions) {
4533        extend(Ctor.extendOptions, modifiedOptions);
4534      }
4535      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
4536      if (options.name) {
4537        options.components[options.name] = Ctor;
4538      }
4539    }
4540  }
4541  return options
4542}
4543
4544function resolveModifiedOptions (Ctor) {
4545  var modified;
4546  var latest = Ctor.options;
4547  var extended = Ctor.extendOptions;
4548  var sealed = Ctor.sealedOptions;
4549  for (var key in latest) {
4550    if (latest[key] !== sealed[key]) {
4551      if (!modified) { modified = {}; }
4552      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
4553    }
4554  }
4555  return modified
4556}
4557
4558function dedupe (latest, extended, sealed) {
4559  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
4560  // between merges
4561  if (Array.isArray(latest)) {
4562    var res = [];
4563    sealed = Array.isArray(sealed) ? sealed : [sealed];
4564    extended = Array.isArray(extended) ? extended : [extended];
4565    for (var i = 0; i < latest.length; i++) {
4566      // push original options and not sealed options to exclude duplicated options
4567      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
4568        res.push(latest[i]);
4569      }
4570    }
4571    return res
4572  } else {
4573    return latest
4574  }
4575}
4576
4577function Vue$3 (options) {
4578  if ("development" !== 'production' &&
4579    !(this instanceof Vue$3)
4580  ) {
4581    warn('Vue is a constructor and should be called with the `new` keyword');
4582  }
4583  this._init(options);
4584}
4585
4586initMixin(Vue$3);
4587stateMixin(Vue$3);
4588eventsMixin(Vue$3);
4589lifecycleMixin(Vue$3);
4590renderMixin(Vue$3);
4591
4592/*  */
4593
4594function initUse (Vue) {
4595  Vue.use = function (plugin) {
4596    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
4597    if (installedPlugins.indexOf(plugin) > -1) {
4598      return this
4599    }
4600
4601    // additional parameters
4602    var args = toArray(arguments, 1);
4603    args.unshift(this);
4604    if (typeof plugin.install === 'function') {
4605      plugin.install.apply(plugin, args);
4606    } else if (typeof plugin === 'function') {
4607      plugin.apply(null, args);
4608    }
4609    installedPlugins.push(plugin);
4610    return this
4611  };
4612}
4613
4614/*  */
4615
4616function initMixin$1 (Vue) {
4617  Vue.mixin = function (mixin) {
4618    this.options = mergeOptions(this.options, mixin);
4619    return this
4620  };
4621}
4622
4623/*  */
4624
4625function initExtend (Vue) {
4626  /**
4627   * Each instance constructor, including Vue, has a unique
4628   * cid. This enables us to create wrapped "child
4629   * constructors" for prototypal inheritance and cache them.
4630   */
4631  Vue.cid = 0;
4632  var cid = 1;
4633
4634  /**
4635   * Class inheritance
4636   */
4637  Vue.extend = function (extendOptions) {
4638    extendOptions = extendOptions || {};
4639    var Super = this;
4640    var SuperId = Super.cid;
4641    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
4642    if (cachedCtors[SuperId]) {
4643      return cachedCtors[SuperId]
4644    }
4645
4646    var name = extendOptions.name || Super.options.name;
4647    {
4648      if (!/^[a-zA-Z][\w-]*$/.test(name)) {
4649        warn(
4650          'Invalid component name: "' + name + '". Component names ' +
4651          'can only contain alphanumeric characters and the hyphen, ' +
4652          'and must start with a letter.'
4653        );
4654      }
4655    }
4656
4657    var Sub = function VueComponent (options) {
4658      this._init(options);
4659    };
4660    Sub.prototype = Object.create(Super.prototype);
4661    Sub.prototype.constructor = Sub;
4662    Sub.cid = cid++;
4663    Sub.options = mergeOptions(
4664      Super.options,
4665      extendOptions
4666    );
4667    Sub['super'] = Super;
4668
4669    // For props and computed properties, we define the proxy getters on
4670    // the Vue instances at extension time, on the extended prototype. This
4671    // avoids Object.defineProperty calls for each instance created.
4672    if (Sub.options.props) {
4673      initProps$1(Sub);
4674    }
4675    if (Sub.options.computed) {
4676      initComputed$1(Sub);
4677    }
4678
4679    // allow further extension/mixin/plugin usage
4680    Sub.extend = Super.extend;
4681    Sub.mixin = Super.mixin;
4682    Sub.use = Super.use;
4683
4684    // create asset registers, so extended classes
4685    // can have their private assets too.
4686    ASSET_TYPES.forEach(function (type) {
4687      Sub[type] = Super[type];
4688    });
4689    // enable recursive self-lookup
4690    if (name) {
4691      Sub.options.components[name] = Sub;
4692    }
4693
4694    // keep a reference to the super options at extension time.
4695    // later at instantiation we can check if Super's options have
4696    // been updated.
4697    Sub.superOptions = Super.options;
4698    Sub.extendOptions = extendOptions;
4699    Sub.sealedOptions = extend({}, Sub.options);
4700
4701    // cache constructor
4702    cachedCtors[SuperId] = Sub;
4703    return Sub
4704  };
4705}
4706
4707function initProps$1 (Comp) {
4708  var props = Comp.options.props;
4709  for (var key in props) {
4710    proxy(Comp.prototype, "_props", key);
4711  }
4712}
4713
4714function initComputed$1 (Comp) {
4715  var computed = Comp.options.computed;
4716  for (var key in computed) {
4717    defineComputed(Comp.prototype, key, computed[key]);
4718  }
4719}
4720
4721/*  */
4722
4723function initAssetRegisters (Vue) {
4724  /**
4725   * Create asset registration methods.
4726   */
4727  ASSET_TYPES.forEach(function (type) {
4728    Vue[type] = function (
4729      id,
4730      definition
4731    ) {
4732      if (!definition) {
4733        return this.options[type + 's'][id]
4734      } else {
4735        /* istanbul ignore if */
4736        {
4737          if (type === 'component' && config.isReservedTag(id)) {
4738            warn(
4739              'Do not use built-in or reserved HTML elements as component ' +
4740              'id: ' + id
4741            );
4742          }
4743        }
4744        if (type === 'component' && isPlainObject(definition)) {
4745          definition.name = definition.name || id;
4746          definition = this.options._base.extend(definition);
4747        }
4748        if (type === 'directive' && typeof definition === 'function') {
4749          definition = { bind: definition, update: definition };
4750        }
4751        this.options[type + 's'][id] = definition;
4752        return definition
4753      }
4754    };
4755  });
4756}
4757
4758/*  */
4759
4760function getComponentName (opts) {
4761  return opts && (opts.Ctor.options.name || opts.tag)
4762}
4763
4764function matches (pattern, name) {
4765  if (Array.isArray(pattern)) {
4766    return pattern.indexOf(name) > -1
4767  } else if (typeof pattern === 'string') {
4768    return pattern.split(',').indexOf(name) > -1
4769  } else if (isRegExp(pattern)) {
4770    return pattern.test(name)
4771  }
4772  /* istanbul ignore next */
4773  return false
4774}
4775
4776function pruneCache (keepAliveInstance, filter) {
4777  var cache = keepAliveInstance.cache;
4778  var keys = keepAliveInstance.keys;
4779  var _vnode = keepAliveInstance._vnode;
4780  for (var key in cache) {
4781    var cachedNode = cache[key];
4782    if (cachedNode) {
4783      var name = getComponentName(cachedNode.componentOptions);
4784      if (name && !filter(name)) {
4785        pruneCacheEntry(cache, key, keys, _vnode);
4786      }
4787    }
4788  }
4789}
4790
4791function pruneCacheEntry (
4792  cache,
4793  key,
4794  keys,
4795  current
4796) {
4797  var cached$$1 = cache[key];
4798  if (cached$$1 && cached$$1 !== current) {
4799    cached$$1.componentInstance.$destroy();
4800  }
4801  cache[key] = null;
4802  remove(keys, key);
4803}
4804
4805var patternTypes = [String, RegExp, Array];
4806
4807var KeepAlive = {
4808  name: 'keep-alive',
4809  abstract: true,
4810
4811  props: {
4812    include: patternTypes,
4813    exclude: patternTypes,
4814    max: [String, Number]
4815  },
4816
4817  created: function created () {
4818    this.cache = Object.create(null);
4819    this.keys = [];
4820  },
4821
4822  destroyed: function destroyed () {
4823    var this$1 = this;
4824
4825    for (var key in this$1.cache) {
4826      pruneCacheEntry(this$1.cache, key, this$1.keys);
4827    }
4828  },
4829
4830  watch: {
4831    include: function include (val) {
4832      pruneCache(this, function (name) { return matches(val, name); });
4833    },
4834    exclude: function exclude (val) {
4835      pruneCache(this, function (name) { return !matches(val, name); });
4836    }
4837  },
4838
4839  render: function render () {
4840    var vnode = getFirstComponentChild(this.$slots.default);
4841    var componentOptions = vnode && vnode.componentOptions;
4842    if (componentOptions) {
4843      // check pattern
4844      var name = getComponentName(componentOptions);
4845      if (name && (
4846        (this.exclude && matches(this.exclude, name)) ||
4847        (this.include && !matches(this.include, name))
4848      )) {
4849        return vnode
4850      }
4851
4852      var ref = this;
4853      var cache = ref.cache;
4854      var keys = ref.keys;
4855      var key = vnode.key == null
4856        // same constructor may get registered as different local components
4857        // so cid alone is not enough (#3269)
4858        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
4859        : vnode.key;
4860      if (cache[key]) {
4861        vnode.componentInstance = cache[key].componentInstance;
4862        // make current key freshest
4863        remove(keys, key);
4864        keys.push(key);
4865      } else {
4866        cache[key] = vnode;
4867        keys.push(key);
4868        // prune oldest entry
4869        if (this.max && keys.length > parseInt(this.max)) {
4870          pruneCacheEntry(cache, keys[0], keys, this._vnode);
4871        }
4872      }
4873
4874      vnode.data.keepAlive = true;
4875    }
4876    return vnode
4877  }
4878};
4879
4880var builtInComponents = {
4881  KeepAlive: KeepAlive
4882};
4883
4884/*  */
4885
4886function initGlobalAPI (Vue) {
4887  // config
4888  var configDef = {};
4889  configDef.get = function () { return config; };
4890  {
4891    configDef.set = function () {
4892      warn(
4893        'Do not replace the Vue.config object, set individual fields instead.'
4894      );
4895    };
4896  }
4897  Object.defineProperty(Vue, 'config', configDef);
4898
4899  // exposed util methods.
4900  // NOTE: these are not considered part of the public API - avoid relying on
4901  // them unless you are aware of the risk.
4902  Vue.util = {
4903    warn: warn,
4904    extend: extend,
4905    mergeOptions: mergeOptions,
4906    defineReactive: defineReactive
4907  };
4908
4909  Vue.set = set;
4910  Vue.delete = del;
4911  Vue.nextTick = nextTick;
4912
4913  Vue.options = Object.create(null);
4914  ASSET_TYPES.forEach(function (type) {
4915    Vue.options[type + 's'] = Object.create(null);
4916  });
4917
4918  // this is used to identify the "base" constructor to extend all plain-object
4919  // components with in Weex's multi-instance scenarios.
4920  Vue.options._base = Vue;
4921
4922  extend(Vue.options.components, builtInComponents);
4923
4924  initUse(Vue);
4925  initMixin$1(Vue);
4926  initExtend(Vue);
4927  initAssetRegisters(Vue);
4928}
4929
4930initGlobalAPI(Vue$3);
4931
4932Object.defineProperty(Vue$3.prototype, '$isServer', {
4933  get: isServerRendering
4934});
4935
4936Object.defineProperty(Vue$3.prototype, '$ssrContext', {
4937  get: function get () {
4938    /* istanbul ignore next */
4939    return this.$vnode && this.$vnode.ssrContext
4940  }
4941});
4942
4943Vue$3.version = '2.5.3';
4944
4945/*  */
4946
4947// these are reserved for web because they are directly compiled away
4948// during template compilation
4949var isReservedAttr = makeMap('style,class');
4950
4951// attributes that should be using props for binding
4952var acceptValue = makeMap('input,textarea,option,select,progress');
4953var mustUseProp = function (tag, type, attr) {
4954  return (
4955    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
4956    (attr === 'selected' && tag === 'option') ||
4957    (attr === 'checked' && tag === 'input') ||
4958    (attr === 'muted' && tag === 'video')
4959  )
4960};
4961
4962var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
4963
4964var isBooleanAttr = makeMap(
4965  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
4966  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
4967  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
4968  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
4969  'required,reversed,scoped,seamless,selected,sortable,translate,' +
4970  'truespeed,typemustmatch,visible'
4971);
4972
4973var xlinkNS = 'http://www.w3.org/1999/xlink';
4974
4975var isXlink = function (name) {
4976  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
4977};
4978
4979var getXlinkProp = function (name) {
4980  return isXlink(name) ? name.slice(6, name.length) : ''
4981};
4982
4983var isFalsyAttrValue = function (val) {
4984  return val == null || val === false
4985};
4986
4987/*  */
4988
4989function genClassForVnode (vnode) {
4990  var data = vnode.data;
4991  var parentNode = vnode;
4992  var childNode = vnode;
4993  while (isDef(childNode.componentInstance)) {
4994    childNode = childNode.componentInstance._vnode;
4995    if (childNode.data) {
4996      data = mergeClassData(childNode.data, data);
4997    }
4998  }
4999  while (isDef(parentNode = parentNode.parent)) {
5000    if (parentNode.data) {
5001      data = mergeClassData(data, parentNode.data);
5002    }
5003  }
5004  return renderClass(data.staticClass, data.class)
5005}
5006
5007function mergeClassData (child, parent) {
5008  return {
5009    staticClass: concat(child.staticClass, parent.staticClass),
5010    class: isDef(child.class)
5011      ? [child.class, parent.class]
5012      : parent.class
5013  }
5014}
5015
5016function renderClass (
5017  staticClass,
5018  dynamicClass
5019) {
5020  if (isDef(staticClass) || isDef(dynamicClass)) {
5021    return concat(staticClass, stringifyClass(dynamicClass))
5022  }
5023  /* istanbul ignore next */
5024  return ''
5025}
5026
5027function concat (a, b) {
5028  return a ? b ? (a + ' ' + b) : a : (b || '')
5029}
5030
5031function stringifyClass (value) {
5032  if (Array.isArray(value)) {
5033    return stringifyArray(value)
5034  }
5035  if (isObject(value)) {
5036    return stringifyObject(value)
5037  }
5038  if (typeof value === 'string') {
5039    return value
5040  }
5041  /* istanbul ignore next */
5042  return ''
5043}
5044
5045function stringifyArray (value) {
5046  var res = '';
5047  var stringified;
5048  for (var i = 0, l = value.length; i < l; i++) {
5049    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
5050      if (res) { res += ' '; }
5051      res += stringified;
5052    }
5053  }
5054  return res
5055}
5056
5057function stringifyObject (value) {
5058  var res = '';
5059  for (var key in value) {
5060    if (value[key]) {
5061      if (res) { res += ' '; }
5062      res += key;
5063    }
5064  }
5065  return res
5066}
5067
5068/*  */
5069
5070var namespaceMap = {
5071  svg: 'http://www.w3.org/2000/svg',
5072  math: 'http://www.w3.org/1998/Math/MathML'
5073};
5074
5075var isHTMLTag = makeMap(
5076  'html,body,base,head,link,meta,style,title,' +
5077  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
5078  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
5079  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
5080  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
5081  'embed,object,param,source,canvas,script,noscript,del,ins,' +
5082  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
5083  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
5084  'output,progress,select,textarea,' +
5085  'details,dialog,menu,menuitem,summary,' +
5086  'content,element,shadow,template,blockquote,iframe,tfoot'
5087);
5088
5089// this map is intentionally selective, only covering SVG elements that may
5090// contain child elements.
5091var isSVG = makeMap(
5092  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
5093  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
5094  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
5095  true
5096);
5097
5098var isPreTag = function (tag) { return tag === 'pre'; };
5099
5100var isReservedTag = function (tag) {
5101  return isHTMLTag(tag) || isSVG(tag)
5102};
5103
5104function getTagNamespace (tag) {
5105  if (isSVG(tag)) {
5106    return 'svg'
5107  }
5108  // basic support for MathML
5109  // note it doesn't support other MathML elements being component roots
5110  if (tag === 'math') {
5111    return 'math'
5112  }
5113}
5114
5115var unknownElementCache = Object.create(null);
5116function isUnknownElement (tag) {
5117  /* istanbul ignore if */
5118  if (!inBrowser) {
5119    return true
5120  }
5121  if (isReservedTag(tag)) {
5122    return false
5123  }
5124  tag = tag.toLowerCase();
5125  /* istanbul ignore if */
5126  if (unknownElementCache[tag] != null) {
5127    return unknownElementCache[tag]
5128  }
5129  var el = document.createElement(tag);
5130  if (tag.indexOf('-') > -1) {
5131    // http://stackoverflow.com/a/28210364/1070244
5132    return (unknownElementCache[tag] = (
5133      el.constructor === window.HTMLUnknownElement ||
5134      el.constructor === window.HTMLElement
5135    ))
5136  } else {
5137    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
5138  }
5139}
5140
5141var isTextInputType = makeMap('text,number,password,search,email,tel,url');
5142
5143/*  */
5144
5145/**
5146 * Query an element selector if it's not an element already.
5147 */
5148function query (el) {
5149  if (typeof el === 'string') {
5150    var selected = document.querySelector(el);
5151    if (!selected) {
5152      "development" !== 'production' && warn(
5153        'Cannot find element: ' + el
5154      );
5155      return document.createElement('div')
5156    }
5157    return selected
5158  } else {
5159    return el
5160  }
5161}
5162
5163/*  */
5164
5165function createElement$1 (tagName, vnode) {
5166  var elm = document.createElement(tagName);
5167  if (tagName !== 'select') {
5168    return elm
5169  }
5170  // false or null will remove the attribute but undefined will not
5171  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
5172    elm.setAttribute('multiple', 'multiple');
5173  }
5174  return elm
5175}
5176
5177function createElementNS (namespace, tagName) {
5178  return document.createElementNS(namespaceMap[namespace], tagName)
5179}
5180
5181function createTextNode (text) {
5182  return document.createTextNode(text)
5183}
5184
5185function createComment (text) {
5186  return document.createComment(text)
5187}
5188
5189function insertBefore (parentNode, newNode, referenceNode) {
5190  parentNode.insertBefore(newNode, referenceNode);
5191}
5192
5193function removeChild (node, child) {
5194  node.removeChild(child);
5195}
5196
5197function appendChild (node, child) {
5198  node.appendChild(child);
5199}
5200
5201function parentNode (node) {
5202  return node.parentNode
5203}
5204
5205function nextSibling (node) {
5206  return node.nextSibling
5207}
5208
5209function tagName (node) {
5210  return node.tagName
5211}
5212
5213function setTextContent (node, text) {
5214  node.textContent = text;
5215}
5216
5217function setAttribute (node, key, val) {
5218  node.setAttribute(key, val);
5219}
5220
5221
5222var nodeOps = Object.freeze({
5223	createElement: createElement$1,
5224	createElementNS: createElementNS,
5225	createTextNode: createTextNode,
5226	createComment: createComment,
5227	insertBefore: insertBefore,
5228	removeChild: removeChild,
5229	appendChild: appendChild,
5230	parentNode: parentNode,
5231	nextSibling: nextSibling,
5232	tagName: tagName,
5233	setTextContent: setTextContent,
5234	setAttribute: setAttribute
5235});
5236
5237/*  */
5238
5239var ref = {
5240  create: function create (_, vnode) {
5241    registerRef(vnode);
5242  },
5243  update: function update (oldVnode, vnode) {
5244    if (oldVnode.data.ref !== vnode.data.ref) {
5245      registerRef(oldVnode, true);
5246      registerRef(vnode);
5247    }
5248  },
5249  destroy: function destroy (vnode) {
5250    registerRef(vnode, true);
5251  }
5252};
5253
5254function registerRef (vnode, isRemoval) {
5255  var key = vnode.data.ref;
5256  if (!key) { return }
5257
5258  var vm = vnode.context;
5259  var ref = vnode.componentInstance || vnode.elm;
5260  var refs = vm.$refs;
5261  if (isRemoval) {
5262    if (Array.isArray(refs[key])) {
5263      remove(refs[key], ref);
5264    } else if (refs[key] === ref) {
5265      refs[key] = undefined;
5266    }
5267  } else {
5268    if (vnode.data.refInFor) {
5269      if (!Array.isArray(refs[key])) {
5270        refs[key] = [ref];
5271      } else if (refs[key].indexOf(ref) < 0) {
5272        // $flow-disable-line
5273        refs[key].push(ref);
5274      }
5275    } else {
5276      refs[key] = ref;
5277    }
5278  }
5279}
5280
5281/**
5282 * Virtual DOM patching algorithm based on Snabbdom by
5283 * Simon Friis Vindum (@paldepind)
5284 * Licensed under the MIT License
5285 * https://github.com/paldepind/snabbdom/blob/master/LICENSE
5286 *
5287 * modified by Evan You (@yyx990803)
5288 *
5289 * Not type-checking this because this file is perf-critical and the cost
5290 * of making flow understand it is not worth it.
5291 */
5292
5293var emptyNode = new VNode('', {}, []);
5294
5295var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
5296
5297function sameVnode (a, b) {
5298  return (
5299    a.key === b.key && (
5300      (
5301        a.tag === b.tag &&
5302        a.isComment === b.isComment &&
5303        isDef(a.data) === isDef(b.data) &&
5304        sameInputType(a, b)
5305      ) || (
5306        isTrue(a.isAsyncPlaceholder) &&
5307        a.asyncFactory === b.asyncFactory &&
5308        isUndef(b.asyncFactory.error)
5309      )
5310    )
5311  )
5312}
5313
5314function sameInputType (a, b) {
5315  if (a.tag !== 'input') { return true }
5316  var i;
5317  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
5318  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
5319  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
5320}
5321
5322function createKeyToOldIdx (children, beginIdx, endIdx) {
5323  var i, key;
5324  var map = {};
5325  for (i = beginIdx; i <= endIdx; ++i) {
5326    key = children[i].key;
5327    if (isDef(key)) { map[key] = i; }
5328  }
5329  return map
5330}
5331
5332function createPatchFunction (backend) {
5333  var i, j;
5334  var cbs = {};
5335
5336  var modules = backend.modules;
5337  var nodeOps = backend.nodeOps;
5338
5339  for (i = 0; i < hooks.length; ++i) {
5340    cbs[hooks[i]] = [];
5341    for (j = 0; j < modules.length; ++j) {
5342      if (isDef(modules[j][hooks[i]])) {
5343        cbs[hooks[i]].push(modules[j][hooks[i]]);
5344      }
5345    }
5346  }
5347
5348  function emptyNodeAt (elm) {
5349    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
5350  }
5351
5352  function createRmCb (childElm, listeners) {
5353    function remove () {
5354      if (--remove.listeners === 0) {
5355        removeNode(childElm);
5356      }
5357    }
5358    remove.listeners = listeners;
5359    return remove
5360  }
5361
5362  function removeNode (el) {
5363    var parent = nodeOps.parentNode(el);
5364    // element may have already been removed due to v-html / v-text
5365    if (isDef(parent)) {
5366      nodeOps.removeChild(parent, el);
5367    }
5368  }
5369
5370  var inPre = 0;
5371  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
5372    vnode.isRootInsert = !nested; // for transition enter check
5373    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
5374      return
5375    }
5376
5377    var data = vnode.data;
5378    var children = vnode.children;
5379    var tag = vnode.tag;
5380    if (isDef(tag)) {
5381      {
5382        if (data && data.pre) {
5383          inPre++;
5384        }
5385        if (
5386          !inPre &&
5387          !vnode.ns &&
5388          !(
5389            config.ignoredElements.length &&
5390            config.ignoredElements.some(function (ignore) {
5391              return isRegExp(ignore)
5392                ? ignore.test(tag)
5393                : ignore === tag
5394            })
5395          ) &&
5396          config.isUnknownElement(tag)
5397        ) {
5398          warn(
5399            'Unknown custom element: <' + tag + '> - did you ' +
5400            'register the component correctly? For recursive components, ' +
5401            'make sure to provide the "name" option.',
5402            vnode.context
5403          );
5404        }
5405      }
5406      vnode.elm = vnode.ns
5407        ? nodeOps.createElementNS(vnode.ns, tag)
5408        : nodeOps.createElement(tag, vnode);
5409      setScope(vnode);
5410
5411      /* istanbul ignore if */
5412      {
5413        createChildren(vnode, children, insertedVnodeQueue);
5414        if (isDef(data)) {
5415          invokeCreateHooks(vnode, insertedVnodeQueue);
5416        }
5417        insert(parentElm, vnode.elm, refElm);
5418      }
5419
5420      if ("development" !== 'production' && data && data.pre) {
5421        inPre--;
5422      }
5423    } else if (isTrue(vnode.isComment)) {
5424      vnode.elm = nodeOps.createComment(vnode.text);
5425      insert(parentElm, vnode.elm, refElm);
5426    } else {
5427      vnode.elm = nodeOps.createTextNode(vnode.text);
5428      insert(parentElm, vnode.elm, refElm);
5429    }
5430  }
5431
5432  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
5433    var i = vnode.data;
5434    if (isDef(i)) {
5435      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
5436      if (isDef(i = i.hook) && isDef(i = i.init)) {
5437        i(vnode, false /* hydrating */, parentElm, refElm);
5438      }
5439      // after calling the init hook, if the vnode is a child component
5440      // it should've created a child instance and mounted it. the child
5441      // component also has set the placeholder vnode's elm.
5442      // in that case we can just return the element and be done.
5443      if (isDef(vnode.componentInstance)) {
5444        initComponent(vnode, insertedVnodeQueue);
5445        if (isTrue(isReactivated)) {
5446          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
5447        }
5448        return true
5449      }
5450    }
5451  }
5452
5453  function initComponent (vnode, insertedVnodeQueue) {
5454    if (isDef(vnode.data.pendingInsert)) {
5455      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
5456      vnode.data.pendingInsert = null;
5457    }
5458    vnode.elm = vnode.componentInstance.$el;
5459    if (isPatchable(vnode)) {
5460      invokeCreateHooks(vnode, insertedVnodeQueue);
5461      setScope(vnode);
5462    } else {
5463      // empty component root.
5464      // skip all element-related modules except for ref (#3455)
5465      registerRef(vnode);
5466      // make sure to invoke the insert hook
5467      insertedVnodeQueue.push(vnode);
5468    }
5469  }
5470
5471  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
5472    var i;
5473    // hack for #4339: a reactivated component with inner transition
5474    // does not trigger because the inner node's created hooks are not called
5475    // again. It's not ideal to involve module-specific logic in here but
5476    // there doesn't seem to be a better way to do it.
5477    var innerNode = vnode;
5478    while (innerNode.componentInstance) {
5479      innerNode = innerNode.componentInstance._vnode;
5480      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
5481        for (i = 0; i < cbs.activate.length; ++i) {
5482          cbs.activate[i](emptyNode, innerNode);
5483        }
5484        insertedVnodeQueue.push(innerNode);
5485        break
5486      }
5487    }
5488    // unlike a newly created component,
5489    // a reactivated keep-alive component doesn't insert itself
5490    insert(parentElm, vnode.elm, refElm);
5491  }
5492
5493  function insert (parent, elm, ref$$1) {
5494    if (isDef(parent)) {
5495      if (isDef(ref$$1)) {
5496        if (ref$$1.parentNode === parent) {
5497          nodeOps.insertBefore(parent, elm, ref$$1);
5498        }
5499      } else {
5500        nodeOps.appendChild(parent, elm);
5501      }
5502    }
5503  }
5504
5505  function createChildren (vnode, children, insertedVnodeQueue) {
5506    if (Array.isArray(children)) {
5507      for (var i = 0; i < children.length; ++i) {
5508        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
5509      }
5510    } else if (isPrimitive(vnode.text)) {
5511      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(vnode.text));
5512    }
5513  }
5514
5515  function isPatchable (vnode) {
5516    while (vnode.componentInstance) {
5517      vnode = vnode.componentInstance._vnode;
5518    }
5519    return isDef(vnode.tag)
5520  }
5521
5522  function invokeCreateHooks (vnode, insertedVnodeQueue) {
5523    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
5524      cbs.create[i$1](emptyNode, vnode);
5525    }
5526    i = vnode.data.hook; // Reuse variable
5527    if (isDef(i)) {
5528      if (isDef(i.create)) { i.create(emptyNode, vnode); }
5529      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
5530    }
5531  }
5532
5533  // set scope id attribute for scoped CSS.
5534  // this is implemented as a special case to avoid the overhead
5535  // of going through the normal attribute patching process.
5536  function setScope (vnode) {
5537    var i;
5538    if (isDef(i = vnode.functionalScopeId)) {
5539      nodeOps.setAttribute(vnode.elm, i, '');
5540    } else {
5541      var ancestor = vnode;
5542      while (ancestor) {
5543        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
5544          nodeOps.setAttribute(vnode.elm, i, '');
5545        }
5546        ancestor = ancestor.parent;
5547      }
5548    }
5549    // for slot content they should also get the scopeId from the host instance.
5550    if (isDef(i = activeInstance) &&
5551      i !== vnode.context &&
5552      i !== vnode.functionalContext &&
5553      isDef(i = i.$options._scopeId)
5554    ) {
5555      nodeOps.setAttribute(vnode.elm, i, '');
5556    }
5557  }
5558
5559  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
5560    for (; startIdx <= endIdx; ++startIdx) {
5561      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
5562    }
5563  }
5564
5565  function invokeDestroyHook (vnode) {
5566    var i, j;
5567    var data = vnode.data;
5568    if (isDef(data)) {
5569      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
5570      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
5571    }
5572    if (isDef(i = vnode.children)) {
5573      for (j = 0; j < vnode.children.length; ++j) {
5574        invokeDestroyHook(vnode.children[j]);
5575      }
5576    }
5577  }
5578
5579  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
5580    for (; startIdx <= endIdx; ++startIdx) {
5581      var ch = vnodes[startIdx];
5582      if (isDef(ch)) {
5583        if (isDef(ch.tag)) {
5584          removeAndInvokeRemoveHook(ch);
5585          invokeDestroyHook(ch);
5586        } else { // Text node
5587          removeNode(ch.elm);
5588        }
5589      }
5590    }
5591  }
5592
5593  function removeAndInvokeRemoveHook (vnode, rm) {
5594    if (isDef(rm) || isDef(vnode.data)) {
5595      var i;
5596      var listeners = cbs.remove.length + 1;
5597      if (isDef(rm)) {
5598        // we have a recursively passed down rm callback
5599        // increase the listeners count
5600        rm.listeners += listeners;
5601      } else {
5602        // directly removing
5603        rm = createRmCb(vnode.elm, listeners);
5604      }
5605      // recursively invoke hooks on child component root node
5606      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
5607        removeAndInvokeRemoveHook(i, rm);
5608      }
5609      for (i = 0; i < cbs.remove.length; ++i) {
5610        cbs.remove[i](vnode, rm);
5611      }
5612      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
5613        i(vnode, rm);
5614      } else {
5615        rm();
5616      }
5617    } else {
5618      removeNode(vnode.elm);
5619    }
5620  }
5621
5622  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
5623    var oldStartIdx = 0;
5624    var newStartIdx = 0;
5625    var oldEndIdx = oldCh.length - 1;
5626    var oldStartVnode = oldCh[0];
5627    var oldEndVnode = oldCh[oldEndIdx];
5628    var newEndIdx = newCh.length - 1;
5629    var newStartVnode = newCh[0];
5630    var newEndVnode = newCh[newEndIdx];
5631    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
5632
5633    // removeOnly is a special flag used only by <transition-group>
5634    // to ensure removed elements stay in correct relative positions
5635    // during leaving transitions
5636    var canMove = !removeOnly;
5637
5638    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
5639      if (isUndef(oldStartVnode)) {
5640        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
5641      } else if (isUndef(oldEndVnode)) {
5642        oldEndVnode = oldCh[--oldEndIdx];
5643      } else if (sameVnode(oldStartVnode, newStartVnode)) {
5644        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
5645        oldStartVnode = oldCh[++oldStartIdx];
5646        newStartVnode = newCh[++newStartIdx];
5647      } else if (sameVnode(oldEndVnode, newEndVnode)) {
5648        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
5649        oldEndVnode = oldCh[--oldEndIdx];
5650        newEndVnode = newCh[--newEndIdx];
5651      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
5652        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
5653        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
5654        oldStartVnode = oldCh[++oldStartIdx];
5655        newEndVnode = newCh[--newEndIdx];
5656      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
5657        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
5658        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
5659        oldEndVnode = oldCh[--oldEndIdx];
5660        newStartVnode = newCh[++newStartIdx];
5661      } else {
5662        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
5663        idxInOld = isDef(newStartVnode.key)
5664          ? oldKeyToIdx[newStartVnode.key]
5665          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
5666        if (isUndef(idxInOld)) { // New element
5667          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
5668        } else {
5669          vnodeToMove = oldCh[idxInOld];
5670          /* istanbul ignore if */
5671          if ("development" !== 'production' && !vnodeToMove) {
5672            warn(
5673              'It seems there are duplicate keys that is causing an update error. ' +
5674              'Make sure each v-for item has a unique key.'
5675            );
5676          }
5677          if (sameVnode(vnodeToMove, newStartVnode)) {
5678            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
5679            oldCh[idxInOld] = undefined;
5680            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
5681          } else {
5682            // same key but different element. treat as new element
5683            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
5684          }
5685        }
5686        newStartVnode = newCh[++newStartIdx];
5687      }
5688    }
5689    if (oldStartIdx > oldEndIdx) {
5690      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
5691      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
5692    } else if (newStartIdx > newEndIdx) {
5693      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
5694    }
5695  }
5696
5697  function findIdxInOld (node, oldCh, start, end) {
5698    for (var i = start; i < end; i++) {
5699      var c = oldCh[i];
5700      if (isDef(c) && sameVnode(node, c)) { return i }
5701    }
5702  }
5703
5704  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
5705    if (oldVnode === vnode) {
5706      return
5707    }
5708
5709    var elm = vnode.elm = oldVnode.elm;
5710
5711    if (isTrue(oldVnode.isAsyncPlaceholder)) {
5712      if (isDef(vnode.asyncFactory.resolved)) {
5713        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
5714      } else {
5715        vnode.isAsyncPlaceholder = true;
5716      }
5717      return
5718    }
5719
5720    // reuse element for static trees.
5721    // note we only do this if the vnode is cloned -
5722    // if the new node is not cloned it means the render functions have been
5723    // reset by the hot-reload-api and we need to do a proper re-render.
5724    if (isTrue(vnode.isStatic) &&
5725      isTrue(oldVnode.isStatic) &&
5726      vnode.key === oldVnode.key &&
5727      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
5728    ) {
5729      vnode.componentInstance = oldVnode.componentInstance;
5730      return
5731    }
5732
5733    var i;
5734    var data = vnode.data;
5735    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
5736      i(oldVnode, vnode);
5737    }
5738
5739    var oldCh = oldVnode.children;
5740    var ch = vnode.children;
5741    if (isDef(data) && isPatchable(vnode)) {
5742      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
5743      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
5744    }
5745    if (isUndef(vnode.text)) {
5746      if (isDef(oldCh) && isDef(ch)) {
5747        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
5748      } else if (isDef(ch)) {
5749        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
5750        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
5751      } else if (isDef(oldCh)) {
5752        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
5753      } else if (isDef(oldVnode.text)) {
5754        nodeOps.setTextContent(elm, '');
5755      }
5756    } else if (oldVnode.text !== vnode.text) {
5757      nodeOps.setTextContent(elm, vnode.text);
5758    }
5759    if (isDef(data)) {
5760      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
5761    }
5762  }
5763
5764  function invokeInsertHook (vnode, queue, initial) {
5765    // delay insert hooks for component root nodes, invoke them after the
5766    // element is really inserted
5767    if (isTrue(initial) && isDef(vnode.parent)) {
5768      vnode.parent.data.pendingInsert = queue;
5769    } else {
5770      for (var i = 0; i < queue.length; ++i) {
5771        queue[i].data.hook.insert(queue[i]);
5772      }
5773    }
5774  }
5775
5776  var bailed = false;
5777  // list of modules that can skip create hook during hydration because they
5778  // are already rendered on the client or has no need for initialization
5779  var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');
5780
5781  // Note: this is a browser-only function so we can assume elms are DOM nodes.
5782  function hydrate (elm, vnode, insertedVnodeQueue) {
5783    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
5784      vnode.elm = elm;
5785      vnode.isAsyncPlaceholder = true;
5786      return true
5787    }
5788    {
5789      if (!assertNodeMatch(elm, vnode)) {
5790        return false
5791      }
5792    }
5793    vnode.elm = elm;
5794    var tag = vnode.tag;
5795    var data = vnode.data;
5796    var children = vnode.children;
5797    if (isDef(data)) {
5798      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
5799      if (isDef(i = vnode.componentInstance)) {
5800        // child component. it should have hydrated its own tree.
5801        initComponent(vnode, insertedVnodeQueue);
5802        return true
5803      }
5804    }
5805    if (isDef(tag)) {
5806      if (isDef(children)) {
5807        // empty element, allow client to pick up and populate children
5808        if (!elm.hasChildNodes()) {
5809          createChildren(vnode, children, insertedVnodeQueue);
5810        } else {
5811          // v-html and domProps: innerHTML
5812          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
5813            if (i !== elm.innerHTML) {
5814              /* istanbul ignore if */
5815              if ("development" !== 'production' &&
5816                typeof console !== 'undefined' &&
5817                !bailed
5818              ) {
5819                bailed = true;
5820                console.warn('Parent: ', elm);
5821                console.warn('server innerHTML: ', i);
5822                console.warn('client innerHTML: ', elm.innerHTML);
5823              }
5824              return false
5825            }
5826          } else {
5827            // iterate and compare children lists
5828            var childrenMatch = true;
5829            var childNode = elm.firstChild;
5830            for (var i$1 = 0; i$1 < children.length; i$1++) {
5831              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
5832                childrenMatch = false;
5833                break
5834              }
5835              childNode = childNode.nextSibling;
5836            }
5837            // if childNode is not null, it means the actual childNodes list is
5838            // longer than the virtual children list.
5839            if (!childrenMatch || childNode) {
5840              /* istanbul ignore if */
5841              if ("development" !== 'production' &&
5842                typeof console !== 'undefined' &&
5843                !bailed
5844              ) {
5845                bailed = true;
5846                console.warn('Parent: ', elm);
5847                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
5848              }
5849              return false
5850            }
5851          }
5852        }
5853      }
5854      if (isDef(data)) {
5855        for (var key in data) {
5856          if (!isRenderedModule(key)) {
5857            invokeCreateHooks(vnode, insertedVnodeQueue);
5858            break
5859          }
5860        }
5861      }
5862    } else if (elm.data !== vnode.text) {
5863      elm.data = vnode.text;
5864    }
5865    return true
5866  }
5867
5868  function assertNodeMatch (node, vnode) {
5869    if (isDef(vnode.tag)) {
5870      return (
5871        vnode.tag.indexOf('vue-component') === 0 ||
5872        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
5873      )
5874    } else {
5875      return node.nodeType === (vnode.isComment ? 8 : 3)
5876    }
5877  }
5878
5879  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
5880    if (isUndef(vnode)) {
5881      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
5882      return
5883    }
5884
5885    var isInitialPatch = false;
5886    var insertedVnodeQueue = [];
5887
5888    if (isUndef(oldVnode)) {
5889      // empty mount (likely as component), create new root element
5890      isInitialPatch = true;
5891      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
5892    } else {
5893      var isRealElement = isDef(oldVnode.nodeType);
5894      if (!isRealElement && sameVnode(oldVnode, vnode)) {
5895        // patch existing root node
5896        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
5897      } else {
5898        if (isRealElement) {
5899          // mounting to a real element
5900          // check if this is server-rendered content and if we can perform
5901          // a successful hydration.
5902          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
5903            oldVnode.removeAttribute(SSR_ATTR);
5904            hydrating = true;
5905          }
5906          if (isTrue(hydrating)) {
5907            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
5908              invokeInsertHook(vnode, insertedVnodeQueue, true);
5909              return oldVnode
5910            } else {
5911              warn(
5912                'The client-side rendered virtual DOM tree is not matching ' +
5913                'server-rendered content. This is likely caused by incorrect ' +
5914                'HTML markup, for example nesting block-level elements inside ' +
5915                '<p>, or missing <tbody>. Bailing hydration and performing ' +
5916                'full client-side render.'
5917              );
5918            }
5919          }
5920          // either not server-rendered, or hydration failed.
5921          // create an empty node and replace it
5922          oldVnode = emptyNodeAt(oldVnode);
5923        }
5924
5925        // replacing existing element
5926        var oldElm = oldVnode.elm;
5927        var parentElm$1 = nodeOps.parentNode(oldElm);
5928
5929        // create new node
5930        createElm(
5931          vnode,
5932          insertedVnodeQueue,
5933          // extremely rare edge case: do not insert if old element is in a
5934          // leaving transition. Only happens when combining transition +
5935          // keep-alive + HOCs. (#4590)
5936          oldElm._leaveCb ? null : parentElm$1,
5937          nodeOps.nextSibling(oldElm)
5938        );
5939
5940        // update parent placeholder node element, recursively
5941        if (isDef(vnode.parent)) {
5942          var ancestor = vnode.parent;
5943          var patchable = isPatchable(vnode);
5944          while (ancestor) {
5945            for (var i = 0; i < cbs.destroy.length; ++i) {
5946              cbs.destroy[i](ancestor);
5947            }
5948            ancestor.elm = vnode.elm;
5949            if (patchable) {
5950              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
5951                cbs.create[i$1](emptyNode, ancestor);
5952              }
5953              // #6513
5954              // invoke insert hooks that may have been merged by create hooks.
5955              // e.g. for directives that uses the "inserted" hook.
5956              var insert = ancestor.data.hook.insert;
5957              if (insert.merged) {
5958                // start at index 1 to avoid re-invoking component mounted hook
5959                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
5960                  insert.fns[i$2]();
5961                }
5962              }
5963            } else {
5964              registerRef(ancestor);
5965            }
5966            ancestor = ancestor.parent;
5967          }
5968        }
5969
5970        // destroy old node
5971        if (isDef(parentElm$1)) {
5972          removeVnodes(parentElm$1, [oldVnode], 0, 0);
5973        } else if (isDef(oldVnode.tag)) {
5974          invokeDestroyHook(oldVnode);
5975        }
5976      }
5977    }
5978
5979    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
5980    return vnode.elm
5981  }
5982}
5983
5984/*  */
5985
5986var directives = {
5987  create: updateDirectives,
5988  update: updateDirectives,
5989  destroy: function unbindDirectives (vnode) {
5990    updateDirectives(vnode, emptyNode);
5991  }
5992};
5993
5994function updateDirectives (oldVnode, vnode) {
5995  if (oldVnode.data.directives || vnode.data.directives) {
5996    _update(oldVnode, vnode);
5997  }
5998}
5999
6000function _update (oldVnode, vnode) {
6001  var isCreate = oldVnode === emptyNode;
6002  var isDestroy = vnode === emptyNode;
6003  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
6004  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
6005
6006  var dirsWithInsert = [];
6007  var dirsWithPostpatch = [];
6008
6009  var key, oldDir, dir;
6010  for (key in newDirs) {
6011    oldDir = oldDirs[key];
6012    dir = newDirs[key];
6013    if (!oldDir) {
6014      // new directive, bind
6015      callHook$1(dir, 'bind', vnode, oldVnode);
6016      if (dir.def && dir.def.inserted) {
6017        dirsWithInsert.push(dir);
6018      }
6019    } else {
6020      // existing directive, update
6021      dir.oldValue = oldDir.value;
6022      callHook$1(dir, 'update', vnode, oldVnode);
6023      if (dir.def && dir.def.componentUpdated) {
6024        dirsWithPostpatch.push(dir);
6025      }
6026    }
6027  }
6028
6029  if (dirsWithInsert.length) {
6030    var callInsert = function () {
6031      for (var i = 0; i < dirsWithInsert.length; i++) {
6032        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
6033      }
6034    };
6035    if (isCreate) {
6036      mergeVNodeHook(vnode, 'insert', callInsert);
6037    } else {
6038      callInsert();
6039    }
6040  }
6041
6042  if (dirsWithPostpatch.length) {
6043    mergeVNodeHook(vnode, 'postpatch', function () {
6044      for (var i = 0; i < dirsWithPostpatch.length; i++) {
6045        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
6046      }
6047    });
6048  }
6049
6050  if (!isCreate) {
6051    for (key in oldDirs) {
6052      if (!newDirs[key]) {
6053        // no longer present, unbind
6054        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
6055      }
6056    }
6057  }
6058}
6059
6060var emptyModifiers = Object.create(null);
6061
6062function normalizeDirectives$1 (
6063  dirs,
6064  vm
6065) {
6066  var res = Object.create(null);
6067  if (!dirs) {
6068    return res
6069  }
6070  var i, dir;
6071  for (i = 0; i < dirs.length; i++) {
6072    dir = dirs[i];
6073    if (!dir.modifiers) {
6074      dir.modifiers = emptyModifiers;
6075    }
6076    res[getRawDirName(dir)] = dir;
6077    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
6078  }
6079  return res
6080}
6081
6082function getRawDirName (dir) {
6083  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
6084}
6085
6086function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
6087  var fn = dir.def && dir.def[hook];
6088  if (fn) {
6089    try {
6090      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
6091    } catch (e) {
6092      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
6093    }
6094  }
6095}
6096
6097var baseModules = [
6098  ref,
6099  directives
6100];
6101
6102/*  */
6103
6104function updateAttrs (oldVnode, vnode) {
6105  var opts = vnode.componentOptions;
6106  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
6107    return
6108  }
6109  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
6110    return
6111  }
6112  var key, cur, old;
6113  var elm = vnode.elm;
6114  var oldAttrs = oldVnode.data.attrs || {};
6115  var attrs = vnode.data.attrs || {};
6116  // clone observed objects, as the user probably wants to mutate it
6117  if (isDef(attrs.__ob__)) {
6118    attrs = vnode.data.attrs = extend({}, attrs);
6119  }
6120
6121  for (key in attrs) {
6122    cur = attrs[key];
6123    old = oldAttrs[key];
6124    if (old !== cur) {
6125      setAttr(elm, key, cur);
6126    }
6127  }
6128  // #4391: in IE9, setting type can reset value for input[type=radio]
6129  // #6666: IE/Edge forces progress value down to 1 before setting a max
6130  /* istanbul ignore if */
6131  if ((isIE9 || isEdge) && attrs.value !== oldAttrs.value) {
6132    setAttr(elm, 'value', attrs.value);
6133  }
6134  for (key in oldAttrs) {
6135    if (isUndef(attrs[key])) {
6136      if (isXlink(key)) {
6137        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
6138      } else if (!isEnumeratedAttr(key)) {
6139        elm.removeAttribute(key);
6140      }
6141    }
6142  }
6143}
6144
6145function setAttr (el, key, value) {
6146  if (isBooleanAttr(key)) {
6147    // set attribute for blank value
6148    // e.g. <option disabled>Select one</option>
6149    if (isFalsyAttrValue(value)) {
6150      el.removeAttribute(key);
6151    } else {
6152      // technically allowfullscreen is a boolean attribute for <iframe>,
6153      // but Flash expects a value of "true" when used on <embed> tag
6154      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
6155        ? 'true'
6156        : key;
6157      el.setAttribute(key, value);
6158    }
6159  } else if (isEnumeratedAttr(key)) {
6160    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
6161  } else if (isXlink(key)) {
6162    if (isFalsyAttrValue(value)) {
6163      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
6164    } else {
6165      el.setAttributeNS(xlinkNS, key, value);
6166    }
6167  } else {
6168    if (isFalsyAttrValue(value)) {
6169      el.removeAttribute(key);
6170    } else {
6171      el.setAttribute(key, value);
6172    }
6173  }
6174}
6175
6176var attrs = {
6177  create: updateAttrs,
6178  update: updateAttrs
6179};
6180
6181/*  */
6182
6183function updateClass (oldVnode, vnode) {
6184  var el = vnode.elm;
6185  var data = vnode.data;
6186  var oldData = oldVnode.data;
6187  if (
6188    isUndef(data.staticClass) &&
6189    isUndef(data.class) && (
6190      isUndef(oldData) || (
6191        isUndef(oldData.staticClass) &&
6192        isUndef(oldData.class)
6193      )
6194    )
6195  ) {
6196    return
6197  }
6198
6199  var cls = genClassForVnode(vnode);
6200
6201  // handle transition classes
6202  var transitionClass = el._transitionClasses;
6203  if (isDef(transitionClass)) {
6204    cls = concat(cls, stringifyClass(transitionClass));
6205  }
6206
6207  // set the class
6208  if (cls !== el._prevClass) {
6209    el.setAttribute('class', cls);
6210    el._prevClass = cls;
6211  }
6212}
6213
6214var klass = {
6215  create: updateClass,
6216  update: updateClass
6217};
6218
6219/*  */
6220
6221var validDivisionCharRE = /[\w).+\-_$\]]/;
6222
6223function parseFilters (exp) {
6224  var inSingle = false;
6225  var inDouble = false;
6226  var inTemplateString = false;
6227  var inRegex = false;
6228  var curly = 0;
6229  var square = 0;
6230  var paren = 0;
6231  var lastFilterIndex = 0;
6232  var c, prev, i, expression, filters;
6233
6234  for (i = 0; i < exp.length; i++) {
6235    prev = c;
6236    c = exp.charCodeAt(i);
6237    if (inSingle) {
6238      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
6239    } else if (inDouble) {
6240      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
6241    } else if (inTemplateString) {
6242      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
6243    } else if (inRegex) {
6244      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
6245    } else if (
6246      c === 0x7C && // pipe
6247      exp.charCodeAt(i + 1) !== 0x7C &&
6248      exp.charCodeAt(i - 1) !== 0x7C &&
6249      !curly && !square && !paren
6250    ) {
6251      if (expression === undefined) {
6252        // first filter, end of expression
6253        lastFilterIndex = i + 1;
6254        expression = exp.slice(0, i).trim();
6255      } else {
6256        pushFilter();
6257      }
6258    } else {
6259      switch (c) {
6260        case 0x22: inDouble = true; break         // "
6261        case 0x27: inSingle = true; break         // '
6262        case 0x60: inTemplateString = true; break // `
6263        case 0x28: paren++; break                 // (
6264        case 0x29: paren--; break                 // )
6265        case 0x5B: square++; break                // [
6266        case 0x5D: square--; break                // ]
6267        case 0x7B: curly++; break                 // {
6268        case 0x7D: curly--; break                 // }
6269      }
6270      if (c === 0x2f) { // /
6271        var j = i - 1;
6272        var p = (void 0);
6273        // find first non-whitespace prev char
6274        for (; j >= 0; j--) {
6275          p = exp.charAt(j);
6276          if (p !== ' ') { break }
6277        }
6278        if (!p || !validDivisionCharRE.test(p)) {
6279          inRegex = true;
6280        }
6281      }
6282    }
6283  }
6284
6285  if (expression === undefined) {
6286    expression = exp.slice(0, i).trim();
6287  } else if (lastFilterIndex !== 0) {
6288    pushFilter();
6289  }
6290
6291  function pushFilter () {
6292    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
6293    lastFilterIndex = i + 1;
6294  }
6295
6296  if (filters) {
6297    for (i = 0; i < filters.length; i++) {
6298      expression = wrapFilter(expression, filters[i]);
6299    }
6300  }
6301
6302  return expression
6303}
6304
6305function wrapFilter (exp, filter) {
6306  var i = filter.indexOf('(');
6307  if (i < 0) {
6308    // _f: resolveFilter
6309    return ("_f(\"" + filter + "\")(" + exp + ")")
6310  } else {
6311    var name = filter.slice(0, i);
6312    var args = filter.slice(i + 1);
6313    return ("_f(\"" + name + "\")(" + exp + "," + args)
6314  }
6315}
6316
6317/*  */
6318
6319function baseWarn (msg) {
6320  console.error(("[Vue compiler]: " + msg));
6321}
6322
6323function pluckModuleFunction (
6324  modules,
6325  key
6326) {
6327  return modules
6328    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
6329    : []
6330}
6331
6332function addProp (el, name, value) {
6333  (el.props || (el.props = [])).push({ name: name, value: value });
6334}
6335
6336function addAttr (el, name, value) {
6337  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
6338}
6339
6340function addDirective (
6341  el,
6342  name,
6343  rawName,
6344  value,
6345  arg,
6346  modifiers
6347) {
6348  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
6349}
6350
6351function addHandler (
6352  el,
6353  name,
6354  value,
6355  modifiers,
6356  important,
6357  warn
6358) {
6359  // warn prevent and passive modifier
6360  /* istanbul ignore if */
6361  if (
6362    "development" !== 'production' && warn &&
6363    modifiers && modifiers.prevent && modifiers.passive
6364  ) {
6365    warn(
6366      'passive and prevent can\'t be used together. ' +
6367      'Passive handler can\'t prevent default event.'
6368    );
6369  }
6370  // check capture modifier
6371  if (modifiers && modifiers.capture) {
6372    delete modifiers.capture;
6373    name = '!' + name; // mark the event as captured
6374  }
6375  if (modifiers && modifiers.once) {
6376    delete modifiers.once;
6377    name = '~' + name; // mark the event as once
6378  }
6379  /* istanbul ignore if */
6380  if (modifiers && modifiers.passive) {
6381    delete modifiers.passive;
6382    name = '&' + name; // mark the event as passive
6383  }
6384  var events;
6385  if (modifiers && modifiers.native) {
6386    delete modifiers.native;
6387    events = el.nativeEvents || (el.nativeEvents = {});
6388  } else {
6389    events = el.events || (el.events = {});
6390  }
6391  var newHandler = { value: value, modifiers: modifiers };
6392  var handlers = events[name];
6393  /* istanbul ignore if */
6394  if (Array.isArray(handlers)) {
6395    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
6396  } else if (handlers) {
6397    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
6398  } else {
6399    events[name] = newHandler;
6400  }
6401}
6402
6403function getBindingAttr (
6404  el,
6405  name,
6406  getStatic
6407) {
6408  var dynamicValue =
6409    getAndRemoveAttr(el, ':' + name) ||
6410    getAndRemoveAttr(el, 'v-bind:' + name);
6411  if (dynamicValue != null) {
6412    return parseFilters(dynamicValue)
6413  } else if (getStatic !== false) {
6414    var staticValue = getAndRemoveAttr(el, name);
6415    if (staticValue != null) {
6416      return JSON.stringify(staticValue)
6417    }
6418  }
6419}
6420
6421// note: this only removes the attr from the Array (attrsList) so that it
6422// doesn't get processed by processAttrs.
6423// By default it does NOT remove it from the map (attrsMap) because the map is
6424// needed during codegen.
6425function getAndRemoveAttr (
6426  el,
6427  name,
6428  removeFromMap
6429) {
6430  var val;
6431  if ((val = el.attrsMap[name]) != null) {
6432    var list = el.attrsList;
6433    for (var i = 0, l = list.length; i < l; i++) {
6434      if (list[i].name === name) {
6435        list.splice(i, 1);
6436        break
6437      }
6438    }
6439  }
6440  if (removeFromMap) {
6441    delete el.attrsMap[name];
6442  }
6443  return val
6444}
6445
6446/*  */
6447
6448/**
6449 * Cross-platform code generation for component v-model
6450 */
6451function genComponentModel (
6452  el,
6453  value,
6454  modifiers
6455) {
6456  var ref = modifiers || {};
6457  var number = ref.number;
6458  var trim = ref.trim;
6459
6460  var baseValueExpression = '$$v';
6461  var valueExpression = baseValueExpression;
6462  if (trim) {
6463    valueExpression =
6464      "(typeof " + baseValueExpression + " === 'string'" +
6465        "? " + baseValueExpression + ".trim()" +
6466        ": " + baseValueExpression + ")";
6467  }
6468  if (number) {
6469    valueExpression = "_n(" + valueExpression + ")";
6470  }
6471  var assignment = genAssignmentCode(value, valueExpression);
6472
6473  el.model = {
6474    value: ("(" + value + ")"),
6475    expression: ("\"" + value + "\""),
6476    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
6477  };
6478}
6479
6480/**
6481 * Cross-platform codegen helper for generating v-model value assignment code.
6482 */
6483function genAssignmentCode (
6484  value,
6485  assignment
6486) {
6487  var res = parseModel(value);
6488  if (res.key === null) {
6489    return (value + "=" + assignment)
6490  } else {
6491    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
6492  }
6493}
6494
6495/**
6496 * Parse a v-model expression into a base path and a final key segment.
6497 * Handles both dot-path and possible square brackets.
6498 *
6499 * Possible cases:
6500 *
6501 * - test
6502 * - test[key]
6503 * - test[test1[key]]
6504 * - test["a"][key]
6505 * - xxx.test[a[a].test1[key]]
6506 * - test.xxx.a["asa"][test1[key]]
6507 *
6508 */
6509
6510var len;
6511var str;
6512var chr;
6513var index$1;
6514var expressionPos;
6515var expressionEndPos;
6516
6517
6518
6519function parseModel (val) {
6520  len = val.length;
6521
6522  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
6523    index$1 = val.lastIndexOf('.');
6524    if (index$1 > -1) {
6525      return {
6526        exp: val.slice(0, index$1),
6527        key: '"' + val.slice(index$1 + 1) + '"'
6528      }
6529    } else {
6530      return {
6531        exp: val,
6532        key: null
6533      }
6534    }
6535  }
6536
6537  str = val;
6538  index$1 = expressionPos = expressionEndPos = 0;
6539
6540  while (!eof()) {
6541    chr = next();
6542    /* istanbul ignore if */
6543    if (isStringStart(chr)) {
6544      parseString(chr);
6545    } else if (chr === 0x5B) {
6546      parseBracket(chr);
6547    }
6548  }
6549
6550  return {
6551    exp: val.slice(0, expressionPos),
6552    key: val.slice(expressionPos + 1, expressionEndPos)
6553  }
6554}
6555
6556function next () {
6557  return str.charCodeAt(++index$1)
6558}
6559
6560function eof () {
6561  return index$1 >= len
6562}
6563
6564function isStringStart (chr) {
6565  return chr === 0x22 || chr === 0x27
6566}
6567
6568function parseBracket (chr) {
6569  var inBracket = 1;
6570  expressionPos = index$1;
6571  while (!eof()) {
6572    chr = next();
6573    if (isStringStart(chr)) {
6574      parseString(chr);
6575      continue
6576    }
6577    if (chr === 0x5B) { inBracket++; }
6578    if (chr === 0x5D) { inBracket--; }
6579    if (inBracket === 0) {
6580      expressionEndPos = index$1;
6581      break
6582    }
6583  }
6584}
6585
6586function parseString (chr) {
6587  var stringQuote = chr;
6588  while (!eof()) {
6589    chr = next();
6590    if (chr === stringQuote) {
6591      break
6592    }
6593  }
6594}
6595
6596/*  */
6597
6598var warn$1;
6599
6600// in some cases, the event used has to be determined at runtime
6601// so we used some reserved tokens during compile.
6602var RANGE_TOKEN = '__r';
6603var CHECKBOX_RADIO_TOKEN = '__c';
6604
6605function model (
6606  el,
6607  dir,
6608  _warn
6609) {
6610  warn$1 = _warn;
6611  var value = dir.value;
6612  var modifiers = dir.modifiers;
6613  var tag = el.tag;
6614  var type = el.attrsMap.type;
6615
6616  {
6617    // inputs with type="file" are read only and setting the input's
6618    // value will throw an error.
6619    if (tag === 'input' && type === 'file') {
6620      warn$1(
6621        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
6622        "File inputs are read only. Use a v-on:change listener instead."
6623      );
6624    }
6625  }
6626
6627  if (el.component) {
6628    genComponentModel(el, value, modifiers);
6629    // component v-model doesn't need extra runtime
6630    return false
6631  } else if (tag === 'select') {
6632    genSelect(el, value, modifiers);
6633  } else if (tag === 'input' && type === 'checkbox') {
6634    genCheckboxModel(el, value, modifiers);
6635  } else if (tag === 'input' && type === 'radio') {
6636    genRadioModel(el, value, modifiers);
6637  } else if (tag === 'input' || tag === 'textarea') {
6638    genDefaultModel(el, value, modifiers);
6639  } else if (!config.isReservedTag(tag)) {
6640    genComponentModel(el, value, modifiers);
6641    // component v-model doesn't need extra runtime
6642    return false
6643  } else {
6644    warn$1(
6645      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
6646      "v-model is not supported on this element type. " +
6647      'If you are working with contenteditable, it\'s recommended to ' +
6648      'wrap a library dedicated for that purpose inside a custom component.'
6649    );
6650  }
6651
6652  // ensure runtime directive metadata
6653  return true
6654}
6655
6656function genCheckboxModel (
6657  el,
6658  value,
6659  modifiers
6660) {
6661  var number = modifiers && modifiers.number;
6662  var valueBinding = getBindingAttr(el, 'value') || 'null';
6663  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
6664  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
6665  addProp(el, 'checked',
6666    "Array.isArray(" + value + ")" +
6667      "?_i(" + value + "," + valueBinding + ")>-1" + (
6668        trueValueBinding === 'true'
6669          ? (":(" + value + ")")
6670          : (":_q(" + value + "," + trueValueBinding + ")")
6671      )
6672  );
6673  addHandler(el, 'change',
6674    "var $$a=" + value + "," +
6675        '$$el=$event.target,' +
6676        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
6677    'if(Array.isArray($$a)){' +
6678      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
6679          '$$i=_i($$a,$$v);' +
6680      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
6681      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
6682    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
6683    null, true
6684  );
6685}
6686
6687function genRadioModel (
6688    el,
6689    value,
6690    modifiers
6691) {
6692  var number = modifiers && modifiers.number;
6693  var valueBinding = getBindingAttr(el, 'value') || 'null';
6694  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
6695  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
6696  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
6697}
6698
6699function genSelect (
6700    el,
6701    value,
6702    modifiers
6703) {
6704  var number = modifiers && modifiers.number;
6705  var selectedVal = "Array.prototype.filter" +
6706    ".call($event.target.options,function(o){return o.selected})" +
6707    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
6708    "return " + (number ? '_n(val)' : 'val') + "})";
6709
6710  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
6711  var code = "var $$selectedVal = " + selectedVal + ";";
6712  code = code + " " + (genAssignmentCode(value, assignment));
6713  addHandler(el, 'change', code, null, true);
6714}
6715
6716function genDefaultModel (
6717  el,
6718  value,
6719  modifiers
6720) {
6721  var type = el.attrsMap.type;
6722  var ref = modifiers || {};
6723  var lazy = ref.lazy;
6724  var number = ref.number;
6725  var trim = ref.trim;
6726  var needCompositionGuard = !lazy && type !== 'range';
6727  var event = lazy
6728    ? 'change'
6729    : type === 'range'
6730      ? RANGE_TOKEN
6731      : 'input';
6732
6733  var valueExpression = '$event.target.value';
6734  if (trim) {
6735    valueExpression = "$event.target.value.trim()";
6736  }
6737  if (number) {
6738    valueExpression = "_n(" + valueExpression + ")";
6739  }
6740
6741  var code = genAssignmentCode(value, valueExpression);
6742  if (needCompositionGuard) {
6743    code = "if($event.target.composing)return;" + code;
6744  }
6745
6746  addProp(el, 'value', ("(" + value + ")"));
6747  addHandler(el, event, code, null, true);
6748  if (trim || number) {
6749    addHandler(el, 'blur', '$forceUpdate()');
6750  }
6751}
6752
6753/*  */
6754
6755// normalize v-model event tokens that can only be determined at runtime.
6756// it's important to place the event as the first in the array because
6757// the whole point is ensuring the v-model callback gets called before
6758// user-attached handlers.
6759function normalizeEvents (on) {
6760  /* istanbul ignore if */
6761  if (isDef(on[RANGE_TOKEN])) {
6762    // IE input[type=range] only supports `change` event
6763    var event = isIE ? 'change' : 'input';
6764    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
6765    delete on[RANGE_TOKEN];
6766  }
6767  // This was originally intended to fix #4521 but no longer necessary
6768  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
6769  /* istanbul ignore if */
6770  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
6771    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
6772    delete on[CHECKBOX_RADIO_TOKEN];
6773  }
6774}
6775
6776var target$1;
6777
6778function createOnceHandler (handler, event, capture) {
6779  var _target = target$1; // save current target element in closure
6780  return function onceHandler () {
6781    var res = handler.apply(null, arguments);
6782    if (res !== null) {
6783      remove$2(event, onceHandler, capture, _target);
6784    }
6785  }
6786}
6787
6788function add$1 (
6789  event,
6790  handler,
6791  once$$1,
6792  capture,
6793  passive
6794) {
6795  handler = withMacroTask(handler);
6796  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
6797  target$1.addEventListener(
6798    event,
6799    handler,
6800    supportsPassive
6801      ? { capture: capture, passive: passive }
6802      : capture
6803  );
6804}
6805
6806function remove$2 (
6807  event,
6808  handler,
6809  capture,
6810  _target
6811) {
6812  (_target || target$1).removeEventListener(
6813    event,
6814    handler._withTask || handler,
6815    capture
6816  );
6817}
6818
6819function updateDOMListeners (oldVnode, vnode) {
6820  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
6821    return
6822  }
6823  var on = vnode.data.on || {};
6824  var oldOn = oldVnode.data.on || {};
6825  target$1 = vnode.elm;
6826  normalizeEvents(on);
6827  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
6828  target$1 = undefined;
6829}
6830
6831var events = {
6832  create: updateDOMListeners,
6833  update: updateDOMListeners
6834};
6835
6836/*  */
6837
6838function updateDOMProps (oldVnode, vnode) {
6839  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
6840    return
6841  }
6842  var key, cur;
6843  var elm = vnode.elm;
6844  var oldProps = oldVnode.data.domProps || {};
6845  var props = vnode.data.domProps || {};
6846  // clone observed objects, as the user probably wants to mutate it
6847  if (isDef(props.__ob__)) {
6848    props = vnode.data.domProps = extend({}, props);
6849  }
6850
6851  for (key in oldProps) {
6852    if (isUndef(props[key])) {
6853      elm[key] = '';
6854    }
6855  }
6856  for (key in props) {
6857    cur = props[key];
6858    // ignore children if the node has textContent or innerHTML,
6859    // as these will throw away existing DOM nodes and cause removal errors
6860    // on subsequent patches (#3360)
6861    if (key === 'textContent' || key === 'innerHTML') {
6862      if (vnode.children) { vnode.children.length = 0; }
6863      if (cur === oldProps[key]) { continue }
6864      // #6601 work around Chrome version <= 55 bug where single textNode
6865      // replaced by innerHTML/textContent retains its parentNode property
6866      if (elm.childNodes.length === 1) {
6867        elm.removeChild(elm.childNodes[0]);
6868      }
6869    }
6870
6871    if (key === 'value') {
6872      // store value as _value as well since
6873      // non-string values will be stringified
6874      elm._value = cur;
6875      // avoid resetting cursor position when value is the same
6876      var strCur = isUndef(cur) ? '' : String(cur);
6877      if (shouldUpdateValue(elm, strCur)) {
6878        elm.value = strCur;
6879      }
6880    } else {
6881      elm[key] = cur;
6882    }
6883  }
6884}
6885
6886// check platforms/web/util/attrs.js acceptValue
6887
6888
6889function shouldUpdateValue (elm, checkVal) {
6890  return (!elm.composing && (
6891    elm.tagName === 'OPTION' ||
6892    isDirty(elm, checkVal) ||
6893    isInputChanged(elm, checkVal)
6894  ))
6895}
6896
6897function isDirty (elm, checkVal) {
6898  // return true when textbox (.number and .trim) loses focus and its value is
6899  // not equal to the updated value
6900  var notInFocus = true;
6901  // #6157
6902  // work around IE bug when accessing document.activeElement in an iframe
6903  try { notInFocus = document.activeElement !== elm; } catch (e) {}
6904  return notInFocus && elm.value !== checkVal
6905}
6906
6907function isInputChanged (elm, newVal) {
6908  var value = elm.value;
6909  var modifiers = elm._vModifiers; // injected by v-model runtime
6910  if (isDef(modifiers) && modifiers.number) {
6911    return toNumber(value) !== toNumber(newVal)
6912  }
6913  if (isDef(modifiers) && modifiers.trim) {
6914    return value.trim() !== newVal.trim()
6915  }
6916  return value !== newVal
6917}
6918
6919var domProps = {
6920  create: updateDOMProps,
6921  update: updateDOMProps
6922};
6923
6924/*  */
6925
6926var parseStyleText = cached(function (cssText) {
6927  var res = {};
6928  var listDelimiter = /;(?![^(]*\))/g;
6929  var propertyDelimiter = /:(.+)/;
6930  cssText.split(listDelimiter).forEach(function (item) {
6931    if (item) {
6932      var tmp = item.split(propertyDelimiter);
6933      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
6934    }
6935  });
6936  return res
6937});
6938
6939// merge static and dynamic style data on the same vnode
6940function normalizeStyleData (data) {
6941  var style = normalizeStyleBinding(data.style);
6942  // static style is pre-processed into an object during compilation
6943  // and is always a fresh object, so it's safe to merge into it
6944  return data.staticStyle
6945    ? extend(data.staticStyle, style)
6946    : style
6947}
6948
6949// normalize possible array / string values into Object
6950function normalizeStyleBinding (bindingStyle) {
6951  if (Array.isArray(bindingStyle)) {
6952    return toObject(bindingStyle)
6953  }
6954  if (typeof bindingStyle === 'string') {
6955    return parseStyleText(bindingStyle)
6956  }
6957  return bindingStyle
6958}
6959
6960/**
6961 * parent component style should be after child's
6962 * so that parent component's style could override it
6963 */
6964function getStyle (vnode, checkChild) {
6965  var res = {};
6966  var styleData;
6967
6968  if (checkChild) {
6969    var childNode = vnode;
6970    while (childNode.componentInstance) {
6971      childNode = childNode.componentInstance._vnode;
6972      if (childNode.data && (styleData = normalizeStyleData(childNode.data))) {
6973        extend(res, styleData);
6974      }
6975    }
6976  }
6977
6978  if ((styleData = normalizeStyleData(vnode.data))) {
6979    extend(res, styleData);
6980  }
6981
6982  var parentNode = vnode;
6983  while ((parentNode = parentNode.parent)) {
6984    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
6985      extend(res, styleData);
6986    }
6987  }
6988  return res
6989}
6990
6991/*  */
6992
6993var cssVarRE = /^--/;
6994var importantRE = /\s*!important$/;
6995var setProp = function (el, name, val) {
6996  /* istanbul ignore if */
6997  if (cssVarRE.test(name)) {
6998    el.style.setProperty(name, val);
6999  } else if (importantRE.test(val)) {
7000    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
7001  } else {
7002    var normalizedName = normalize(name);
7003    if (Array.isArray(val)) {
7004      // Support values array created by autoprefixer, e.g.
7005      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
7006      // Set them one by one, and the browser will only set those it can recognize
7007      for (var i = 0, len = val.length; i < len; i++) {
7008        el.style[normalizedName] = val[i];
7009      }
7010    } else {
7011      el.style[normalizedName] = val;
7012    }
7013  }
7014};
7015
7016var vendorNames = ['Webkit', 'Moz', 'ms'];
7017
7018var emptyStyle;
7019var normalize = cached(function (prop) {
7020  emptyStyle = emptyStyle || document.createElement('div').style;
7021  prop = camelize(prop);
7022  if (prop !== 'filter' && (prop in emptyStyle)) {
7023    return prop
7024  }
7025  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
7026  for (var i = 0; i < vendorNames.length; i++) {
7027    var name = vendorNames[i] + capName;
7028    if (name in emptyStyle) {
7029      return name
7030    }
7031  }
7032});
7033
7034function updateStyle (oldVnode, vnode) {
7035  var data = vnode.data;
7036  var oldData = oldVnode.data;
7037
7038  if (isUndef(data.staticStyle) && isUndef(data.style) &&
7039    isUndef(oldData.staticStyle) && isUndef(oldData.style)
7040  ) {
7041    return
7042  }
7043
7044  var cur, name;
7045  var el = vnode.elm;
7046  var oldStaticStyle = oldData.staticStyle;
7047  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
7048
7049  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
7050  var oldStyle = oldStaticStyle || oldStyleBinding;
7051
7052  var style = normalizeStyleBinding(vnode.data.style) || {};
7053
7054  // store normalized style under a different key for next diff
7055  // make sure to clone it if it's reactive, since the user likely wants
7056  // to mutate it.
7057  vnode.data.normalizedStyle = isDef(style.__ob__)
7058    ? extend({}, style)
7059    : style;
7060
7061  var newStyle = getStyle(vnode, true);
7062
7063  for (name in oldStyle) {
7064    if (isUndef(newStyle[name])) {
7065      setProp(el, name, '');
7066    }
7067  }
7068  for (name in newStyle) {
7069    cur = newStyle[name];
7070    if (cur !== oldStyle[name]) {
7071      // ie9 setting to null has no effect, must use empty string
7072      setProp(el, name, cur == null ? '' : cur);
7073    }
7074  }
7075}
7076
7077var style = {
7078  create: updateStyle,
7079  update: updateStyle
7080};
7081
7082/*  */
7083
7084/**
7085 * Add class with compatibility for SVG since classList is not supported on
7086 * SVG elements in IE
7087 */
7088function addClass (el, cls) {
7089  /* istanbul ignore if */
7090  if (!cls || !(cls = cls.trim())) {
7091    return
7092  }
7093
7094  /* istanbul ignore else */
7095  if (el.classList) {
7096    if (cls.indexOf(' ') > -1) {
7097      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
7098    } else {
7099      el.classList.add(cls);
7100    }
7101  } else {
7102    var cur = " " + (el.getAttribute('class') || '') + " ";
7103    if (cur.indexOf(' ' + cls + ' ') < 0) {
7104      el.setAttribute('class', (cur + cls).trim());
7105    }
7106  }
7107}
7108
7109/**
7110 * Remove class with compatibility for SVG since classList is not supported on
7111 * SVG elements in IE
7112 */
7113function removeClass (el, cls) {
7114  /* istanbul ignore if */
7115  if (!cls || !(cls = cls.trim())) {
7116    return
7117  }
7118
7119  /* istanbul ignore else */
7120  if (el.classList) {
7121    if (cls.indexOf(' ') > -1) {
7122      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
7123    } else {
7124      el.classList.remove(cls);
7125    }
7126    if (!el.classList.length) {
7127      el.removeAttribute('class');
7128    }
7129  } else {
7130    var cur = " " + (el.getAttribute('class') || '') + " ";
7131    var tar = ' ' + cls + ' ';
7132    while (cur.indexOf(tar) >= 0) {
7133      cur = cur.replace(tar, ' ');
7134    }
7135    cur = cur.trim();
7136    if (cur) {
7137      el.setAttribute('class', cur);
7138    } else {
7139      el.removeAttribute('class');
7140    }
7141  }
7142}
7143
7144/*  */
7145
7146function resolveTransition (def) {
7147  if (!def) {
7148    return
7149  }
7150  /* istanbul ignore else */
7151  if (typeof def === 'object') {
7152    var res = {};
7153    if (def.css !== false) {
7154      extend(res, autoCssTransition(def.name || 'v'));
7155    }
7156    extend(res, def);
7157    return res
7158  } else if (typeof def === 'string') {
7159    return autoCssTransition(def)
7160  }
7161}
7162
7163var autoCssTransition = cached(function (name) {
7164  return {
7165    enterClass: (name + "-enter"),
7166    enterToClass: (name + "-enter-to"),
7167    enterActiveClass: (name + "-enter-active"),
7168    leaveClass: (name + "-leave"),
7169    leaveToClass: (name + "-leave-to"),
7170    leaveActiveClass: (name + "-leave-active")
7171  }
7172});
7173
7174var hasTransition = inBrowser && !isIE9;
7175var TRANSITION = 'transition';
7176var ANIMATION = 'animation';
7177
7178// Transition property/event sniffing
7179var transitionProp = 'transition';
7180var transitionEndEvent = 'transitionend';
7181var animationProp = 'animation';
7182var animationEndEvent = 'animationend';
7183if (hasTransition) {
7184  /* istanbul ignore if */
7185  if (window.ontransitionend === undefined &&
7186    window.onwebkittransitionend !== undefined
7187  ) {
7188    transitionProp = 'WebkitTransition';
7189    transitionEndEvent = 'webkitTransitionEnd';
7190  }
7191  if (window.onanimationend === undefined &&
7192    window.onwebkitanimationend !== undefined
7193  ) {
7194    animationProp = 'WebkitAnimation';
7195    animationEndEvent = 'webkitAnimationEnd';
7196  }
7197}
7198
7199// binding to window is necessary to make hot reload work in IE in strict mode
7200var raf = inBrowser
7201  ? window.requestAnimationFrame
7202    ? window.requestAnimationFrame.bind(window)
7203    : setTimeout
7204  : /* istanbul ignore next */ function (fn) { return fn(); };
7205
7206function nextFrame (fn) {
7207  raf(function () {
7208    raf(fn);
7209  });
7210}
7211
7212function addTransitionClass (el, cls) {
7213  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
7214  if (transitionClasses.indexOf(cls) < 0) {
7215    transitionClasses.push(cls);
7216    addClass(el, cls);
7217  }
7218}
7219
7220function removeTransitionClass (el, cls) {
7221  if (el._transitionClasses) {
7222    remove(el._transitionClasses, cls);
7223  }
7224  removeClass(el, cls);
7225}
7226
7227function whenTransitionEnds (
7228  el,
7229  expectedType,
7230  cb
7231) {
7232  var ref = getTransitionInfo(el, expectedType);
7233  var type = ref.type;
7234  var timeout = ref.timeout;
7235  var propCount = ref.propCount;
7236  if (!type) { return cb() }
7237  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
7238  var ended = 0;
7239  var end = function () {
7240    el.removeEventListener(event, onEnd);
7241    cb();
7242  };
7243  var onEnd = function (e) {
7244    if (e.target === el) {
7245      if (++ended >= propCount) {
7246        end();
7247      }
7248    }
7249  };
7250  setTimeout(function () {
7251    if (ended < propCount) {
7252      end();
7253    }
7254  }, timeout + 1);
7255  el.addEventListener(event, onEnd);
7256}
7257
7258var transformRE = /\b(transform|all)(,|$)/;
7259
7260function getTransitionInfo (el, expectedType) {
7261  var styles = window.getComputedStyle(el);
7262  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
7263  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
7264  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
7265  var animationDelays = styles[animationProp + 'Delay'].split(', ');
7266  var animationDurations = styles[animationProp + 'Duration'].split(', ');
7267  var animationTimeout = getTimeout(animationDelays, animationDurations);
7268
7269  var type;
7270  var timeout = 0;
7271  var propCount = 0;
7272  /* istanbul ignore if */
7273  if (expectedType === TRANSITION) {
7274    if (transitionTimeout > 0) {
7275      type = TRANSITION;
7276      timeout = transitionTimeout;
7277      propCount = transitionDurations.length;
7278    }
7279  } else if (expectedType === ANIMATION) {
7280    if (animationTimeout > 0) {
7281      type = ANIMATION;
7282      timeout = animationTimeout;
7283      propCount = animationDurations.length;
7284    }
7285  } else {
7286    timeout = Math.max(transitionTimeout, animationTimeout);
7287    type = timeout > 0
7288      ? transitionTimeout > animationTimeout
7289        ? TRANSITION
7290        : ANIMATION
7291      : null;
7292    propCount = type
7293      ? type === TRANSITION
7294        ? transitionDurations.length
7295        : animationDurations.length
7296      : 0;
7297  }
7298  var hasTransform =
7299    type === TRANSITION &&
7300    transformRE.test(styles[transitionProp + 'Property']);
7301  return {
7302    type: type,
7303    timeout: timeout,
7304    propCount: propCount,
7305    hasTransform: hasTransform
7306  }
7307}
7308
7309function getTimeout (delays, durations) {
7310  /* istanbul ignore next */
7311  while (delays.length < durations.length) {
7312    delays = delays.concat(delays);
7313  }
7314
7315  return Math.max.apply(null, durations.map(function (d, i) {
7316    return toMs(d) + toMs(delays[i])
7317  }))
7318}
7319
7320function toMs (s) {
7321  return Number(s.slice(0, -1)) * 1000
7322}
7323
7324/*  */
7325
7326function enter (vnode, toggleDisplay) {
7327  var el = vnode.elm;
7328
7329  // call leave callback now
7330  if (isDef(el._leaveCb)) {
7331    el._leaveCb.cancelled = true;
7332    el._leaveCb();
7333  }
7334
7335  var data = resolveTransition(vnode.data.transition);
7336  if (isUndef(data)) {
7337    return
7338  }
7339
7340  /* istanbul ignore if */
7341  if (isDef(el._enterCb) || el.nodeType !== 1) {
7342    return
7343  }
7344
7345  var css = data.css;
7346  var type = data.type;
7347  var enterClass = data.enterClass;
7348  var enterToClass = data.enterToClass;
7349  var enterActiveClass = data.enterActiveClass;
7350  var appearClass = data.appearClass;
7351  var appearToClass = data.appearToClass;
7352  var appearActiveClass = data.appearActiveClass;
7353  var beforeEnter = data.beforeEnter;
7354  var enter = data.enter;
7355  var afterEnter = data.afterEnter;
7356  var enterCancelled = data.enterCancelled;
7357  var beforeAppear = data.beforeAppear;
7358  var appear = data.appear;
7359  var afterAppear = data.afterAppear;
7360  var appearCancelled = data.appearCancelled;
7361  var duration = data.duration;
7362
7363  // activeInstance will always be the <transition> component managing this
7364  // transition. One edge case to check is when the <transition> is placed
7365  // as the root node of a child component. In that case we need to check
7366  // <transition>'s parent for appear check.
7367  var context = activeInstance;
7368  var transitionNode = activeInstance.$vnode;
7369  while (transitionNode && transitionNode.parent) {
7370    transitionNode = transitionNode.parent;
7371    context = transitionNode.context;
7372  }
7373
7374  var isAppear = !context._isMounted || !vnode.isRootInsert;
7375
7376  if (isAppear && !appear && appear !== '') {
7377    return
7378  }
7379
7380  var startClass = isAppear && appearClass
7381    ? appearClass
7382    : enterClass;
7383  var activeClass = isAppear && appearActiveClass
7384    ? appearActiveClass
7385    : enterActiveClass;
7386  var toClass = isAppear && appearToClass
7387    ? appearToClass
7388    : enterToClass;
7389
7390  var beforeEnterHook = isAppear
7391    ? (beforeAppear || beforeEnter)
7392    : beforeEnter;
7393  var enterHook = isAppear
7394    ? (typeof appear === 'function' ? appear : enter)
7395    : enter;
7396  var afterEnterHook = isAppear
7397    ? (afterAppear || afterEnter)
7398    : afterEnter;
7399  var enterCancelledHook = isAppear
7400    ? (appearCancelled || enterCancelled)
7401    : enterCancelled;
7402
7403  var explicitEnterDuration = toNumber(
7404    isObject(duration)
7405      ? duration.enter
7406      : duration
7407  );
7408
7409  if ("development" !== 'production' && explicitEnterDuration != null) {
7410    checkDuration(explicitEnterDuration, 'enter', vnode);
7411  }
7412
7413  var expectsCSS = css !== false && !isIE9;
7414  var userWantsControl = getHookArgumentsLength(enterHook);
7415
7416  var cb = el._enterCb = once(function () {
7417    if (expectsCSS) {
7418      removeTransitionClass(el, toClass);
7419      removeTransitionClass(el, activeClass);
7420    }
7421    if (cb.cancelled) {
7422      if (expectsCSS) {
7423        removeTransitionClass(el, startClass);
7424      }
7425      enterCancelledHook && enterCancelledHook(el);
7426    } else {
7427      afterEnterHook && afterEnterHook(el);
7428    }
7429    el._enterCb = null;
7430  });
7431
7432  if (!vnode.data.show) {
7433    // remove pending leave element on enter by injecting an insert hook
7434    mergeVNodeHook(vnode, 'insert', function () {
7435      var parent = el.parentNode;
7436      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
7437      if (pendingNode &&
7438        pendingNode.tag === vnode.tag &&
7439        pendingNode.elm._leaveCb
7440      ) {
7441        pendingNode.elm._leaveCb();
7442      }
7443      enterHook && enterHook(el, cb);
7444    });
7445  }
7446
7447  // start enter transition
7448  beforeEnterHook && beforeEnterHook(el);
7449  if (expectsCSS) {
7450    addTransitionClass(el, startClass);
7451    addTransitionClass(el, activeClass);
7452    nextFrame(function () {
7453      addTransitionClass(el, toClass);
7454      removeTransitionClass(el, startClass);
7455      if (!cb.cancelled && !userWantsControl) {
7456        if (isValidDuration(explicitEnterDuration)) {
7457          setTimeout(cb, explicitEnterDuration);
7458        } else {
7459          whenTransitionEnds(el, type, cb);
7460        }
7461      }
7462    });
7463  }
7464
7465  if (vnode.data.show) {
7466    toggleDisplay && toggleDisplay();
7467    enterHook && enterHook(el, cb);
7468  }
7469
7470  if (!expectsCSS && !userWantsControl) {
7471    cb();
7472  }
7473}
7474
7475function leave (vnode, rm) {
7476  var el = vnode.elm;
7477
7478  // call enter callback now
7479  if (isDef(el._enterCb)) {
7480    el._enterCb.cancelled = true;
7481    el._enterCb();
7482  }
7483
7484  var data = resolveTransition(vnode.data.transition);
7485  if (isUndef(data)) {
7486    return rm()
7487  }
7488
7489  /* istanbul ignore if */
7490  if (isDef(el._leaveCb) || el.nodeType !== 1) {
7491    return
7492  }
7493
7494  var css = data.css;
7495  var type = data.type;
7496  var leaveClass = data.leaveClass;
7497  var leaveToClass = data.leaveToClass;
7498  var leaveActiveClass = data.leaveActiveClass;
7499  var beforeLeave = data.beforeLeave;
7500  var leave = data.leave;
7501  var afterLeave = data.afterLeave;
7502  var leaveCancelled = data.leaveCancelled;
7503  var delayLeave = data.delayLeave;
7504  var duration = data.duration;
7505
7506  var expectsCSS = css !== false && !isIE9;
7507  var userWantsControl = getHookArgumentsLength(leave);
7508
7509  var explicitLeaveDuration = toNumber(
7510    isObject(duration)
7511      ? duration.leave
7512      : duration
7513  );
7514
7515  if ("development" !== 'production' && isDef(explicitLeaveDuration)) {
7516    checkDuration(explicitLeaveDuration, 'leave', vnode);
7517  }
7518
7519  var cb = el._leaveCb = once(function () {
7520    if (el.parentNode && el.parentNode._pending) {
7521      el.parentNode._pending[vnode.key] = null;
7522    }
7523    if (expectsCSS) {
7524      removeTransitionClass(el, leaveToClass);
7525      removeTransitionClass(el, leaveActiveClass);
7526    }
7527    if (cb.cancelled) {
7528      if (expectsCSS) {
7529        removeTransitionClass(el, leaveClass);
7530      }
7531      leaveCancelled && leaveCancelled(el);
7532    } else {
7533      rm();
7534      afterLeave && afterLeave(el);
7535    }
7536    el._leaveCb = null;
7537  });
7538
7539  if (delayLeave) {
7540    delayLeave(performLeave);
7541  } else {
7542    performLeave();
7543  }
7544
7545  function performLeave () {
7546    // the delayed leave may have already been cancelled
7547    if (cb.cancelled) {
7548      return
7549    }
7550    // record leaving element
7551    if (!vnode.data.show) {
7552      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
7553    }
7554    beforeLeave && beforeLeave(el);
7555    if (expectsCSS) {
7556      addTransitionClass(el, leaveClass);
7557      addTransitionClass(el, leaveActiveClass);
7558      nextFrame(function () {
7559        addTransitionClass(el, leaveToClass);
7560        removeTransitionClass(el, leaveClass);
7561        if (!cb.cancelled && !userWantsControl) {
7562          if (isValidDuration(explicitLeaveDuration)) {
7563            setTimeout(cb, explicitLeaveDuration);
7564          } else {
7565            whenTransitionEnds(el, type, cb);
7566          }
7567        }
7568      });
7569    }
7570    leave && leave(el, cb);
7571    if (!expectsCSS && !userWantsControl) {
7572      cb();
7573    }
7574  }
7575}
7576
7577// only used in dev mode
7578function checkDuration (val, name, vnode) {
7579  if (typeof val !== 'number') {
7580    warn(
7581      "<transition> explicit " + name + " duration is not a valid number - " +
7582      "got " + (JSON.stringify(val)) + ".",
7583      vnode.context
7584    );
7585  } else if (isNaN(val)) {
7586    warn(
7587      "<transition> explicit " + name + " duration is NaN - " +
7588      'the duration expression might be incorrect.',
7589      vnode.context
7590    );
7591  }
7592}
7593
7594function isValidDuration (val) {
7595  return typeof val === 'number' && !isNaN(val)
7596}
7597
7598/**
7599 * Normalize a transition hook's argument length. The hook may be:
7600 * - a merged hook (invoker) with the original in .fns
7601 * - a wrapped component method (check ._length)
7602 * - a plain function (.length)
7603 */
7604function getHookArgumentsLength (fn) {
7605  if (isUndef(fn)) {
7606    return false
7607  }
7608  var invokerFns = fn.fns;
7609  if (isDef(invokerFns)) {
7610    // invoker
7611    return getHookArgumentsLength(
7612      Array.isArray(invokerFns)
7613        ? invokerFns[0]
7614        : invokerFns
7615    )
7616  } else {
7617    return (fn._length || fn.length) > 1
7618  }
7619}
7620
7621function _enter (_, vnode) {
7622  if (vnode.data.show !== true) {
7623    enter(vnode);
7624  }
7625}
7626
7627var transition = inBrowser ? {
7628  create: _enter,
7629  activate: _enter,
7630  remove: function remove$$1 (vnode, rm) {
7631    /* istanbul ignore else */
7632    if (vnode.data.show !== true) {
7633      leave(vnode, rm);
7634    } else {
7635      rm();
7636    }
7637  }
7638} : {};
7639
7640var platformModules = [
7641  attrs,
7642  klass,
7643  events,
7644  domProps,
7645  style,
7646  transition
7647];
7648
7649/*  */
7650
7651// the directive module should be applied last, after all
7652// built-in modules have been applied.
7653var modules = platformModules.concat(baseModules);
7654
7655var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
7656
7657/**
7658 * Not type checking this file because flow doesn't like attaching
7659 * properties to Elements.
7660 */
7661
7662/* istanbul ignore if */
7663if (isIE9) {
7664  // http://www.matts411.com/post/internet-explorer-9-oninput/
7665  document.addEventListener('selectionchange', function () {
7666    var el = document.activeElement;
7667    if (el && el.vmodel) {
7668      trigger(el, 'input');
7669    }
7670  });
7671}
7672
7673var directive = {
7674  inserted: function inserted (el, binding, vnode, oldVnode) {
7675    if (vnode.tag === 'select') {
7676      // #6903
7677      if (oldVnode.elm && !oldVnode.elm._vOptions) {
7678        mergeVNodeHook(vnode, 'postpatch', function () {
7679          directive.componentUpdated(el, binding, vnode);
7680        });
7681      } else {
7682        setSelected(el, binding, vnode.context);
7683      }
7684      el._vOptions = [].map.call(el.options, getValue);
7685    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
7686      el._vModifiers = binding.modifiers;
7687      if (!binding.modifiers.lazy) {
7688        // Safari < 10.2 & UIWebView doesn't fire compositionend when
7689        // switching focus before confirming composition choice
7690        // this also fixes the issue where some browsers e.g. iOS Chrome
7691        // fires "change" instead of "input" on autocomplete.
7692        el.addEventListener('change', onCompositionEnd);
7693        if (!isAndroid) {
7694          el.addEventListener('compositionstart', onCompositionStart);
7695          el.addEventListener('compositionend', onCompositionEnd);
7696        }
7697        /* istanbul ignore if */
7698        if (isIE9) {
7699          el.vmodel = true;
7700        }
7701      }
7702    }
7703  },
7704
7705  componentUpdated: function componentUpdated (el, binding, vnode) {
7706    if (vnode.tag === 'select') {
7707      setSelected(el, binding, vnode.context);
7708      // in case the options rendered by v-for have changed,
7709      // it's possible that the value is out-of-sync with the rendered options.
7710      // detect such cases and filter out values that no longer has a matching
7711      // option in the DOM.
7712      var prevOptions = el._vOptions;
7713      var curOptions = el._vOptions = [].map.call(el.options, getValue);
7714      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
7715        // trigger change event if
7716        // no matching option found for at least one value
7717        var needReset = el.multiple
7718          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
7719          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
7720        if (needReset) {
7721          trigger(el, 'change');
7722        }
7723      }
7724    }
7725  }
7726};
7727
7728function setSelected (el, binding, vm) {
7729  actuallySetSelected(el, binding, vm);
7730  /* istanbul ignore if */
7731  if (isIE || isEdge) {
7732    setTimeout(function () {
7733      actuallySetSelected(el, binding, vm);
7734    }, 0);
7735  }
7736}
7737
7738function actuallySetSelected (el, binding, vm) {
7739  var value = binding.value;
7740  var isMultiple = el.multiple;
7741  if (isMultiple && !Array.isArray(value)) {
7742    "development" !== 'production' && warn(
7743      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
7744      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
7745      vm
7746    );
7747    return
7748  }
7749  var selected, option;
7750  for (var i = 0, l = el.options.length; i < l; i++) {
7751    option = el.options[i];
7752    if (isMultiple) {
7753      selected = looseIndexOf(value, getValue(option)) > -1;
7754      if (option.selected !== selected) {
7755        option.selected = selected;
7756      }
7757    } else {
7758      if (looseEqual(getValue(option), value)) {
7759        if (el.selectedIndex !== i) {
7760          el.selectedIndex = i;
7761        }
7762        return
7763      }
7764    }
7765  }
7766  if (!isMultiple) {
7767    el.selectedIndex = -1;
7768  }
7769}
7770
7771function hasNoMatchingOption (value, options) {
7772  return options.every(function (o) { return !looseEqual(o, value); })
7773}
7774
7775function getValue (option) {
7776  return '_value' in option
7777    ? option._value
7778    : option.value
7779}
7780
7781function onCompositionStart (e) {
7782  e.target.composing = true;
7783}
7784
7785function onCompositionEnd (e) {
7786  // prevent triggering an input event for no reason
7787  if (!e.target.composing) { return }
7788  e.target.composing = false;
7789  trigger(e.target, 'input');
7790}
7791
7792function trigger (el, type) {
7793  var e = document.createEvent('HTMLEvents');
7794  e.initEvent(type, true, true);
7795  el.dispatchEvent(e);
7796}
7797
7798/*  */
7799
7800// recursively search for possible transition defined inside the component root
7801function locateNode (vnode) {
7802  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
7803    ? locateNode(vnode.componentInstance._vnode)
7804    : vnode
7805}
7806
7807var show = {
7808  bind: function bind (el, ref, vnode) {
7809    var value = ref.value;
7810
7811    vnode = locateNode(vnode);
7812    var transition$$1 = vnode.data && vnode.data.transition;
7813    var originalDisplay = el.__vOriginalDisplay =
7814      el.style.display === 'none' ? '' : el.style.display;
7815    if (value && transition$$1) {
7816      vnode.data.show = true;
7817      enter(vnode, function () {
7818        el.style.display = originalDisplay;
7819      });
7820    } else {
7821      el.style.display = value ? originalDisplay : 'none';
7822    }
7823  },
7824
7825  update: function update (el, ref, vnode) {
7826    var value = ref.value;
7827    var oldValue = ref.oldValue;
7828
7829    /* istanbul ignore if */
7830    if (value === oldValue) { return }
7831    vnode = locateNode(vnode);
7832    var transition$$1 = vnode.data && vnode.data.transition;
7833    if (transition$$1) {
7834      vnode.data.show = true;
7835      if (value) {
7836        enter(vnode, function () {
7837          el.style.display = el.__vOriginalDisplay;
7838        });
7839      } else {
7840        leave(vnode, function () {
7841          el.style.display = 'none';
7842        });
7843      }
7844    } else {
7845      el.style.display = value ? el.__vOriginalDisplay : 'none';
7846    }
7847  },
7848
7849  unbind: function unbind (
7850    el,
7851    binding,
7852    vnode,
7853    oldVnode,
7854    isDestroy
7855  ) {
7856    if (!isDestroy) {
7857      el.style.display = el.__vOriginalDisplay;
7858    }
7859  }
7860};
7861
7862var platformDirectives = {
7863  model: directive,
7864  show: show
7865};
7866
7867/*  */
7868
7869// Provides transition support for a single element/component.
7870// supports transition mode (out-in / in-out)
7871
7872var transitionProps = {
7873  name: String,
7874  appear: Boolean,
7875  css: Boolean,
7876  mode: String,
7877  type: String,
7878  enterClass: String,
7879  leaveClass: String,
7880  enterToClass: String,
7881  leaveToClass: String,
7882  enterActiveClass: String,
7883  leaveActiveClass: String,
7884  appearClass: String,
7885  appearActiveClass: String,
7886  appearToClass: String,
7887  duration: [Number, String, Object]
7888};
7889
7890// in case the child is also an abstract component, e.g. <keep-alive>
7891// we want to recursively retrieve the real component to be rendered
7892function getRealChild (vnode) {
7893  var compOptions = vnode && vnode.componentOptions;
7894  if (compOptions && compOptions.Ctor.options.abstract) {
7895    return getRealChild(getFirstComponentChild(compOptions.children))
7896  } else {
7897    return vnode
7898  }
7899}
7900
7901function extractTransitionData (comp) {
7902  var data = {};
7903  var options = comp.$options;
7904  // props
7905  for (var key in options.propsData) {
7906    data[key] = comp[key];
7907  }
7908  // events.
7909  // extract listeners and pass them directly to the transition methods
7910  var listeners = options._parentListeners;
7911  for (var key$1 in listeners) {
7912    data[camelize(key$1)] = listeners[key$1];
7913  }
7914  return data
7915}
7916
7917function placeholder (h, rawChild) {
7918  if (/\d-keep-alive$/.test(rawChild.tag)) {
7919    return h('keep-alive', {
7920      props: rawChild.componentOptions.propsData
7921    })
7922  }
7923}
7924
7925function hasParentTransition (vnode) {
7926  while ((vnode = vnode.parent)) {
7927    if (vnode.data.transition) {
7928      return true
7929    }
7930  }
7931}
7932
7933function isSameChild (child, oldChild) {
7934  return oldChild.key === child.key && oldChild.tag === child.tag
7935}
7936
7937var Transition = {
7938  name: 'transition',
7939  props: transitionProps,
7940  abstract: true,
7941
7942  render: function render (h) {
7943    var this$1 = this;
7944
7945    var children = this.$options._renderChildren;
7946    if (!children) {
7947      return
7948    }
7949
7950    // filter out text nodes (possible whitespaces)
7951    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
7952    /* istanbul ignore if */
7953    if (!children.length) {
7954      return
7955    }
7956
7957    // warn multiple elements
7958    if ("development" !== 'production' && children.length > 1) {
7959      warn(
7960        '<transition> can only be used on a single element. Use ' +
7961        '<transition-group> for lists.',
7962        this.$parent
7963      );
7964    }
7965
7966    var mode = this.mode;
7967
7968    // warn invalid mode
7969    if ("development" !== 'production' &&
7970      mode && mode !== 'in-out' && mode !== 'out-in'
7971    ) {
7972      warn(
7973        'invalid <transition> mode: ' + mode,
7974        this.$parent
7975      );
7976    }
7977
7978    var rawChild = children[0];
7979
7980    // if this is a component root node and the component's
7981    // parent container node also has transition, skip.
7982    if (hasParentTransition(this.$vnode)) {
7983      return rawChild
7984    }
7985
7986    // apply transition data to child
7987    // use getRealChild() to ignore abstract components e.g. keep-alive
7988    var child = getRealChild(rawChild);
7989    /* istanbul ignore if */
7990    if (!child) {
7991      return rawChild
7992    }
7993
7994    if (this._leaving) {
7995      return placeholder(h, rawChild)
7996    }
7997
7998    // ensure a key that is unique to the vnode type and to this transition
7999    // component instance. This key will be used to remove pending leaving nodes
8000    // during entering.
8001    var id = "__transition-" + (this._uid) + "-";
8002    child.key = child.key == null
8003      ? child.isComment
8004        ? id + 'comment'
8005        : id + child.tag
8006      : isPrimitive(child.key)
8007        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
8008        : child.key;
8009
8010    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
8011    var oldRawChild = this._vnode;
8012    var oldChild = getRealChild(oldRawChild);
8013
8014    // mark v-show
8015    // so that the transition module can hand over the control to the directive
8016    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
8017      child.data.show = true;
8018    }
8019
8020    if (
8021      oldChild &&
8022      oldChild.data &&
8023      !isSameChild(child, oldChild) &&
8024      !isAsyncPlaceholder(oldChild)
8025    ) {
8026      // replace old child transition data with fresh one
8027      // important for dynamic transitions!
8028      var oldData = oldChild.data.transition = extend({}, data);
8029      // handle transition mode
8030      if (mode === 'out-in') {
8031        // return placeholder node and queue update when leave finishes
8032        this._leaving = true;
8033        mergeVNodeHook(oldData, 'afterLeave', function () {
8034          this$1._leaving = false;
8035          this$1.$forceUpdate();
8036        });
8037        return placeholder(h, rawChild)
8038      } else if (mode === 'in-out') {
8039        if (isAsyncPlaceholder(child)) {
8040          return oldRawChild
8041        }
8042        var delayedLeave;
8043        var performLeave = function () { delayedLeave(); };
8044        mergeVNodeHook(data, 'afterEnter', performLeave);
8045        mergeVNodeHook(data, 'enterCancelled', performLeave);
8046        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
8047      }
8048    }
8049
8050    return rawChild
8051  }
8052};
8053
8054/*  */
8055
8056// Provides transition support for list items.
8057// supports move transitions using the FLIP technique.
8058
8059// Because the vdom's children update algorithm is "unstable" - i.e.
8060// it doesn't guarantee the relative positioning of removed elements,
8061// we force transition-group to update its children into two passes:
8062// in the first pass, we remove all nodes that need to be removed,
8063// triggering their leaving transition; in the second pass, we insert/move
8064// into the final desired state. This way in the second pass removed
8065// nodes will remain where they should be.
8066
8067var props = extend({
8068  tag: String,
8069  moveClass: String
8070}, transitionProps);
8071
8072delete props.mode;
8073
8074var TransitionGroup = {
8075  props: props,
8076
8077  render: function render (h) {
8078    var tag = this.tag || this.$vnode.data.tag || 'span';
8079    var map = Object.create(null);
8080    var prevChildren = this.prevChildren = this.children;
8081    var rawChildren = this.$slots.default || [];
8082    var children = this.children = [];
8083    var transitionData = extractTransitionData(this);
8084
8085    for (var i = 0; i < rawChildren.length; i++) {
8086      var c = rawChildren[i];
8087      if (c.tag) {
8088        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
8089          children.push(c);
8090          map[c.key] = c
8091          ;(c.data || (c.data = {})).transition = transitionData;
8092        } else {
8093          var opts = c.componentOptions;
8094          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
8095          warn(("<transition-group> children must be keyed: <" + name + ">"));
8096        }
8097      }
8098    }
8099
8100    if (prevChildren) {
8101      var kept = [];
8102      var removed = [];
8103      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
8104        var c$1 = prevChildren[i$1];
8105        c$1.data.transition = transitionData;
8106        c$1.data.pos = c$1.elm.getBoundingClientRect();
8107        if (map[c$1.key]) {
8108          kept.push(c$1);
8109        } else {
8110          removed.push(c$1);
8111        }
8112      }
8113      this.kept = h(tag, null, kept);
8114      this.removed = removed;
8115    }
8116
8117    return h(tag, null, children)
8118  },
8119
8120  beforeUpdate: function beforeUpdate () {
8121    // force removing pass
8122    this.__patch__(
8123      this._vnode,
8124      this.kept,
8125      false, // hydrating
8126      true // removeOnly (!important, avoids unnecessary moves)
8127    );
8128    this._vnode = this.kept;
8129  },
8130
8131  updated: function updated () {
8132    var children = this.prevChildren;
8133    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
8134    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
8135      return
8136    }
8137
8138    // we divide the work into three loops to avoid mixing DOM reads and writes
8139    // in each iteration - which helps prevent layout thrashing.
8140    children.forEach(callPendingCbs);
8141    children.forEach(recordPosition);
8142    children.forEach(applyTranslation);
8143
8144    // force reflow to put everything in position
8145    // assign to this to avoid being removed in tree-shaking
8146    // $flow-disable-line
8147    this._reflow = document.body.offsetHeight;
8148
8149    children.forEach(function (c) {
8150      if (c.data.moved) {
8151        var el = c.elm;
8152        var s = el.style;
8153        addTransitionClass(el, moveClass);
8154        s.transform = s.WebkitTransform = s.transitionDuration = '';
8155        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
8156          if (!e || /transform$/.test(e.propertyName)) {
8157            el.removeEventListener(transitionEndEvent, cb);
8158            el._moveCb = null;
8159            removeTransitionClass(el, moveClass);
8160          }
8161        });
8162      }
8163    });
8164  },
8165
8166  methods: {
8167    hasMove: function hasMove (el, moveClass) {
8168      /* istanbul ignore if */
8169      if (!hasTransition) {
8170        return false
8171      }
8172      /* istanbul ignore if */
8173      if (this._hasMove) {
8174        return this._hasMove
8175      }
8176      // Detect whether an element with the move class applied has
8177      // CSS transitions. Since the element may be inside an entering
8178      // transition at this very moment, we make a clone of it and remove
8179      // all other transition classes applied to ensure only the move class
8180      // is applied.
8181      var clone = el.cloneNode();
8182      if (el._transitionClasses) {
8183        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
8184      }
8185      addClass(clone, moveClass);
8186      clone.style.display = 'none';
8187      this.$el.appendChild(clone);
8188      var info = getTransitionInfo(clone);
8189      this.$el.removeChild(clone);
8190      return (this._hasMove = info.hasTransform)
8191    }
8192  }
8193};
8194
8195function callPendingCbs (c) {
8196  /* istanbul ignore if */
8197  if (c.elm._moveCb) {
8198    c.elm._moveCb();
8199  }
8200  /* istanbul ignore if */
8201  if (c.elm._enterCb) {
8202    c.elm._enterCb();
8203  }
8204}
8205
8206function recordPosition (c) {
8207  c.data.newPos = c.elm.getBoundingClientRect();
8208}
8209
8210function applyTranslation (c) {
8211  var oldPos = c.data.pos;
8212  var newPos = c.data.newPos;
8213  var dx = oldPos.left - newPos.left;
8214  var dy = oldPos.top - newPos.top;
8215  if (dx || dy) {
8216    c.data.moved = true;
8217    var s = c.elm.style;
8218    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
8219    s.transitionDuration = '0s';
8220  }
8221}
8222
8223var platformComponents = {
8224  Transition: Transition,
8225  TransitionGroup: TransitionGroup
8226};
8227
8228/*  */
8229
8230// install platform specific utils
8231Vue$3.config.mustUseProp = mustUseProp;
8232Vue$3.config.isReservedTag = isReservedTag;
8233Vue$3.config.isReservedAttr = isReservedAttr;
8234Vue$3.config.getTagNamespace = getTagNamespace;
8235Vue$3.config.isUnknownElement = isUnknownElement;
8236
8237// install platform runtime directives & components
8238extend(Vue$3.options.directives, platformDirectives);
8239extend(Vue$3.options.components, platformComponents);
8240
8241// install platform patch function
8242Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
8243
8244// public mount method
8245Vue$3.prototype.$mount = function (
8246  el,
8247  hydrating
8248) {
8249  el = el && inBrowser ? query(el) : undefined;
8250  return mountComponent(this, el, hydrating)
8251};
8252
8253// devtools global hook
8254/* istanbul ignore next */
8255Vue$3.nextTick(function () {
8256  if (config.devtools) {
8257    if (devtools) {
8258      devtools.emit('init', Vue$3);
8259    } else if ("development" !== 'production' && isChrome) {
8260      console[console.info ? 'info' : 'log'](
8261        'Download the Vue Devtools extension for a better development experience:\n' +
8262        'https://github.com/vuejs/vue-devtools'
8263      );
8264    }
8265  }
8266  if ("development" !== 'production' &&
8267    config.productionTip !== false &&
8268    inBrowser && typeof console !== 'undefined'
8269  ) {
8270    console[console.info ? 'info' : 'log'](
8271      "You are running Vue in development mode.\n" +
8272      "Make sure to turn on production mode when deploying for production.\n" +
8273      "See more tips at https://vuejs.org/guide/deployment.html"
8274    );
8275  }
8276}, 0);
8277
8278/*  */
8279
8280var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
8281var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
8282
8283var buildRegex = cached(function (delimiters) {
8284  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
8285  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
8286  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
8287});
8288
8289function parseText (
8290  text,
8291  delimiters
8292) {
8293  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
8294  if (!tagRE.test(text)) {
8295    return
8296  }
8297  var tokens = [];
8298  var lastIndex = tagRE.lastIndex = 0;
8299  var match, index;
8300  while ((match = tagRE.exec(text))) {
8301    index = match.index;
8302    // push text token
8303    if (index > lastIndex) {
8304      tokens.push(JSON.stringify(text.slice(lastIndex, index)));
8305    }
8306    // tag token
8307    var exp = parseFilters(match[1].trim());
8308    tokens.push(("_s(" + exp + ")"));
8309    lastIndex = index + match[0].length;
8310  }
8311  if (lastIndex < text.length) {
8312    tokens.push(JSON.stringify(text.slice(lastIndex)));
8313  }
8314  return tokens.join('+')
8315}
8316
8317/*  */
8318
8319function transformNode (el, options) {
8320  var warn = options.warn || baseWarn;
8321  var staticClass = getAndRemoveAttr(el, 'class');
8322  if ("development" !== 'production' && staticClass) {
8323    var expression = parseText(staticClass, options.delimiters);
8324    if (expression) {
8325      warn(
8326        "class=\"" + staticClass + "\": " +
8327        'Interpolation inside attributes has been removed. ' +
8328        'Use v-bind or the colon shorthand instead. For example, ' +
8329        'instead of <div class="{{ val }}">, use <div :class="val">.'
8330      );
8331    }
8332  }
8333  if (staticClass) {
8334    el.staticClass = JSON.stringify(staticClass);
8335  }
8336  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
8337  if (classBinding) {
8338    el.classBinding = classBinding;
8339  }
8340}
8341
8342function genData (el) {
8343  var data = '';
8344  if (el.staticClass) {
8345    data += "staticClass:" + (el.staticClass) + ",";
8346  }
8347  if (el.classBinding) {
8348    data += "class:" + (el.classBinding) + ",";
8349  }
8350  return data
8351}
8352
8353var klass$1 = {
8354  staticKeys: ['staticClass'],
8355  transformNode: transformNode,
8356  genData: genData
8357};
8358
8359/*  */
8360
8361function transformNode$1 (el, options) {
8362  var warn = options.warn || baseWarn;
8363  var staticStyle = getAndRemoveAttr(el, 'style');
8364  if (staticStyle) {
8365    /* istanbul ignore if */
8366    {
8367      var expression = parseText(staticStyle, options.delimiters);
8368      if (expression) {
8369        warn(
8370          "style=\"" + staticStyle + "\": " +
8371          'Interpolation inside attributes has been removed. ' +
8372          'Use v-bind or the colon shorthand instead. For example, ' +
8373          'instead of <div style="{{ val }}">, use <div :style="val">.'
8374        );
8375      }
8376    }
8377    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
8378  }
8379
8380  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
8381  if (styleBinding) {
8382    el.styleBinding = styleBinding;
8383  }
8384}
8385
8386function genData$1 (el) {
8387  var data = '';
8388  if (el.staticStyle) {
8389    data += "staticStyle:" + (el.staticStyle) + ",";
8390  }
8391  if (el.styleBinding) {
8392    data += "style:(" + (el.styleBinding) + "),";
8393  }
8394  return data
8395}
8396
8397var style$1 = {
8398  staticKeys: ['staticStyle'],
8399  transformNode: transformNode$1,
8400  genData: genData$1
8401};
8402
8403/*  */
8404
8405var decoder;
8406
8407var he = {
8408  decode: function decode (html) {
8409    decoder = decoder || document.createElement('div');
8410    decoder.innerHTML = html;
8411    return decoder.textContent
8412  }
8413};
8414
8415/*  */
8416
8417var isUnaryTag = makeMap(
8418  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
8419  'link,meta,param,source,track,wbr'
8420);
8421
8422// Elements that you can, intentionally, leave open
8423// (and which close themselves)
8424var canBeLeftOpenTag = makeMap(
8425  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
8426);
8427
8428// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
8429// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
8430var isNonPhrasingTag = makeMap(
8431  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
8432  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
8433  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
8434  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
8435  'title,tr,track'
8436);
8437
8438/**
8439 * Not type-checking this file because it's mostly vendor code.
8440 */
8441
8442/*!
8443 * HTML Parser By John Resig (ejohn.org)
8444 * Modified by Juriy "kangax" Zaytsev
8445 * Original code by Erik Arvidsson, Mozilla Public License
8446 * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
8447 */
8448
8449// Regular Expressions for parsing tags and attributes
8450var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
8451// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
8452// but for Vue templates we can enforce a simple charset
8453var ncname = '[a-zA-Z_][\\w\\-\\.]*';
8454var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
8455var startTagOpen = new RegExp(("^<" + qnameCapture));
8456var startTagClose = /^\s*(\/?)>/;
8457var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
8458var doctype = /^<!DOCTYPE [^>]+>/i;
8459var comment = /^<!--/;
8460var conditionalComment = /^<!\[/;
8461
8462var IS_REGEX_CAPTURING_BROKEN = false;
8463'x'.replace(/x(.)?/g, function (m, g) {
8464  IS_REGEX_CAPTURING_BROKEN = g === '';
8465});
8466
8467// Special Elements (can contain anything)
8468var isPlainTextElement = makeMap('script,style,textarea', true);
8469var reCache = {};
8470
8471var decodingMap = {
8472  '&lt;': '<',
8473  '&gt;': '>',
8474  '&quot;': '"',
8475  '&amp;': '&',
8476  '&#10;': '\n',
8477  '&#9;': '\t'
8478};
8479var encodedAttr = /&(?:lt|gt|quot|amp);/g;
8480var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
8481
8482// #5992
8483var isIgnoreNewlineTag = makeMap('pre,textarea', true);
8484var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
8485
8486function decodeAttr (value, shouldDecodeNewlines) {
8487  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
8488  return value.replace(re, function (match) { return decodingMap[match]; })
8489}
8490
8491function parseHTML (html, options) {
8492  var stack = [];
8493  var expectHTML = options.expectHTML;
8494  var isUnaryTag$$1 = options.isUnaryTag || no;
8495  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
8496  var index = 0;
8497  var last, lastTag;
8498  while (html) {
8499    last = html;
8500    // Make sure we're not in a plaintext content element like script/style
8501    if (!lastTag || !isPlainTextElement(lastTag)) {
8502      var textEnd = html.indexOf('<');
8503      if (textEnd === 0) {
8504        // Comment:
8505        if (comment.test(html)) {
8506          var commentEnd = html.indexOf('-->');
8507
8508          if (commentEnd >= 0) {
8509            if (options.shouldKeepComment) {
8510              options.comment(html.substring(4, commentEnd));
8511            }
8512            advance(commentEnd + 3);
8513            continue
8514          }
8515        }
8516
8517        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
8518        if (conditionalComment.test(html)) {
8519          var conditionalEnd = html.indexOf(']>');
8520
8521          if (conditionalEnd >= 0) {
8522            advance(conditionalEnd + 2);
8523            continue
8524          }
8525        }
8526
8527        // Doctype:
8528        var doctypeMatch = html.match(doctype);
8529        if (doctypeMatch) {
8530          advance(doctypeMatch[0].length);
8531          continue
8532        }
8533
8534        // End tag:
8535        var endTagMatch = html.match(endTag);
8536        if (endTagMatch) {
8537          var curIndex = index;
8538          advance(endTagMatch[0].length);
8539          parseEndTag(endTagMatch[1], curIndex, index);
8540          continue
8541        }
8542
8543        // Start tag:
8544        var startTagMatch = parseStartTag();
8545        if (startTagMatch) {
8546          handleStartTag(startTagMatch);
8547          if (shouldIgnoreFirstNewline(lastTag, html)) {
8548            advance(1);
8549          }
8550          continue
8551        }
8552      }
8553
8554      var text = (void 0), rest = (void 0), next = (void 0);
8555      if (textEnd >= 0) {
8556        rest = html.slice(textEnd);
8557        while (
8558          !endTag.test(rest) &&
8559          !startTagOpen.test(rest) &&
8560          !comment.test(rest) &&
8561          !conditionalComment.test(rest)
8562        ) {
8563          // < in plain text, be forgiving and treat it as text
8564          next = rest.indexOf('<', 1);
8565          if (next < 0) { break }
8566          textEnd += next;
8567          rest = html.slice(textEnd);
8568        }
8569        text = html.substring(0, textEnd);
8570        advance(textEnd);
8571      }
8572
8573      if (textEnd < 0) {
8574        text = html;
8575        html = '';
8576      }
8577
8578      if (options.chars && text) {
8579        options.chars(text);
8580      }
8581    } else {
8582      var endTagLength = 0;
8583      var stackedTag = lastTag.toLowerCase();
8584      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
8585      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
8586        endTagLength = endTag.length;
8587        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
8588          text = text
8589            .replace(/<!--([\s\S]*?)-->/g, '$1')
8590            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
8591        }
8592        if (shouldIgnoreFirstNewline(stackedTag, text)) {
8593          text = text.slice(1);
8594        }
8595        if (options.chars) {
8596          options.chars(text);
8597        }
8598        return ''
8599      });
8600      index += html.length - rest$1.length;
8601      html = rest$1;
8602      parseEndTag(stackedTag, index - endTagLength, index);
8603    }
8604
8605    if (html === last) {
8606      options.chars && options.chars(html);
8607      if ("development" !== 'production' && !stack.length && options.warn) {
8608        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
8609      }
8610      break
8611    }
8612  }
8613
8614  // Clean up any remaining tags
8615  parseEndTag();
8616
8617  function advance (n) {
8618    index += n;
8619    html = html.substring(n);
8620  }
8621
8622  function parseStartTag () {
8623    var start = html.match(startTagOpen);
8624    if (start) {
8625      var match = {
8626        tagName: start[1],
8627        attrs: [],
8628        start: index
8629      };
8630      advance(start[0].length);
8631      var end, attr;
8632      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
8633        advance(attr[0].length);
8634        match.attrs.push(attr);
8635      }
8636      if (end) {
8637        match.unarySlash = end[1];
8638        advance(end[0].length);
8639        match.end = index;
8640        return match
8641      }
8642    }
8643  }
8644
8645  function handleStartTag (match) {
8646    var tagName = match.tagName;
8647    var unarySlash = match.unarySlash;
8648
8649    if (expectHTML) {
8650      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
8651        parseEndTag(lastTag);
8652      }
8653      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
8654        parseEndTag(tagName);
8655      }
8656    }
8657
8658    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
8659
8660    var l = match.attrs.length;
8661    var attrs = new Array(l);
8662    for (var i = 0; i < l; i++) {
8663      var args = match.attrs[i];
8664      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
8665      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
8666        if (args[3] === '') { delete args[3]; }
8667        if (args[4] === '') { delete args[4]; }
8668        if (args[5] === '') { delete args[5]; }
8669      }
8670      var value = args[3] || args[4] || args[5] || '';
8671      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
8672        ? options.shouldDecodeNewlinesForHref
8673        : options.shouldDecodeNewlines;
8674      attrs[i] = {
8675        name: args[1],
8676        value: decodeAttr(value, shouldDecodeNewlines)
8677      };
8678    }
8679
8680    if (!unary) {
8681      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
8682      lastTag = tagName;
8683    }
8684
8685    if (options.start) {
8686      options.start(tagName, attrs, unary, match.start, match.end);
8687    }
8688  }
8689
8690  function parseEndTag (tagName, start, end) {
8691    var pos, lowerCasedTagName;
8692    if (start == null) { start = index; }
8693    if (end == null) { end = index; }
8694
8695    if (tagName) {
8696      lowerCasedTagName = tagName.toLowerCase();
8697    }
8698
8699    // Find the closest opened tag of the same type
8700    if (tagName) {
8701      for (pos = stack.length - 1; pos >= 0; pos--) {
8702        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
8703          break
8704        }
8705      }
8706    } else {
8707      // If no tag name is provided, clean shop
8708      pos = 0;
8709    }
8710
8711    if (pos >= 0) {
8712      // Close all the open elements, up the stack
8713      for (var i = stack.length - 1; i >= pos; i--) {
8714        if ("development" !== 'production' &&
8715          (i > pos || !tagName) &&
8716          options.warn
8717        ) {
8718          options.warn(
8719            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
8720          );
8721        }
8722        if (options.end) {
8723          options.end(stack[i].tag, start, end);
8724        }
8725      }
8726
8727      // Remove the open elements from the stack
8728      stack.length = pos;
8729      lastTag = pos && stack[pos - 1].tag;
8730    } else if (lowerCasedTagName === 'br') {
8731      if (options.start) {
8732        options.start(tagName, [], true, start, end);
8733      }
8734    } else if (lowerCasedTagName === 'p') {
8735      if (options.start) {
8736        options.start(tagName, [], false, start, end);
8737      }
8738      if (options.end) {
8739        options.end(tagName, start, end);
8740      }
8741    }
8742  }
8743}
8744
8745/*  */
8746
8747var onRE = /^@|^v-on:/;
8748var dirRE = /^v-|^@|^:/;
8749var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
8750var forIteratorRE = /\((\{[^}]*\}|[^,]*),([^,]*)(?:,([^,]*))?\)/;
8751
8752var argRE = /:(.*)$/;
8753var bindRE = /^:|^v-bind:/;
8754var modifierRE = /\.[^.]+/g;
8755
8756var decodeHTMLCached = cached(he.decode);
8757
8758// configurable state
8759var warn$2;
8760var delimiters;
8761var transforms;
8762var preTransforms;
8763var postTransforms;
8764var platformIsPreTag;
8765var platformMustUseProp;
8766var platformGetTagNamespace;
8767
8768
8769
8770function createASTElement (
8771  tag,
8772  attrs,
8773  parent
8774) {
8775  return {
8776    type: 1,
8777    tag: tag,
8778    attrsList: attrs,
8779    attrsMap: makeAttrsMap(attrs),
8780    parent: parent,
8781    children: []
8782  }
8783}
8784
8785/**
8786 * Convert HTML string to AST.
8787 */
8788function parse (
8789  template,
8790  options
8791) {
8792  warn$2 = options.warn || baseWarn;
8793
8794  platformIsPreTag = options.isPreTag || no;
8795  platformMustUseProp = options.mustUseProp || no;
8796  platformGetTagNamespace = options.getTagNamespace || no;
8797
8798  transforms = pluckModuleFunction(options.modules, 'transformNode');
8799  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
8800  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
8801
8802  delimiters = options.delimiters;
8803
8804  var stack = [];
8805  var preserveWhitespace = options.preserveWhitespace !== false;
8806  var root;
8807  var currentParent;
8808  var inVPre = false;
8809  var inPre = false;
8810  var warned = false;
8811
8812  function warnOnce (msg) {
8813    if (!warned) {
8814      warned = true;
8815      warn$2(msg);
8816    }
8817  }
8818
8819  function endPre (element) {
8820    // check pre state
8821    if (element.pre) {
8822      inVPre = false;
8823    }
8824    if (platformIsPreTag(element.tag)) {
8825      inPre = false;
8826    }
8827  }
8828
8829  parseHTML(template, {
8830    warn: warn$2,
8831    expectHTML: options.expectHTML,
8832    isUnaryTag: options.isUnaryTag,
8833    canBeLeftOpenTag: options.canBeLeftOpenTag,
8834    shouldDecodeNewlines: options.shouldDecodeNewlines,
8835    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
8836    shouldKeepComment: options.comments,
8837    start: function start (tag, attrs, unary) {
8838      // check namespace.
8839      // inherit parent ns if there is one
8840      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
8841
8842      // handle IE svg bug
8843      /* istanbul ignore if */
8844      if (isIE && ns === 'svg') {
8845        attrs = guardIESVGBug(attrs);
8846      }
8847
8848      var element = createASTElement(tag, attrs, currentParent);
8849      if (ns) {
8850        element.ns = ns;
8851      }
8852
8853      if (isForbiddenTag(element) && !isServerRendering()) {
8854        element.forbidden = true;
8855        "development" !== 'production' && warn$2(
8856          'Templates should only be responsible for mapping the state to the ' +
8857          'UI. Avoid placing tags with side-effects in your templates, such as ' +
8858          "<" + tag + ">" + ', as they will not be parsed.'
8859        );
8860      }
8861
8862      // apply pre-transforms
8863      for (var i = 0; i < preTransforms.length; i++) {
8864        element = preTransforms[i](element, options) || element;
8865      }
8866
8867      if (!inVPre) {
8868        processPre(element);
8869        if (element.pre) {
8870          inVPre = true;
8871        }
8872      }
8873      if (platformIsPreTag(element.tag)) {
8874        inPre = true;
8875      }
8876      if (inVPre) {
8877        processRawAttrs(element);
8878      } else if (!element.processed) {
8879        // structural directives
8880        processFor(element);
8881        processIf(element);
8882        processOnce(element);
8883        // element-scope stuff
8884        processElement(element, options);
8885      }
8886
8887      function checkRootConstraints (el) {
8888        {
8889          if (el.tag === 'slot' || el.tag === 'template') {
8890            warnOnce(
8891              "Cannot use <" + (el.tag) + "> as component root element because it may " +
8892              'contain multiple nodes.'
8893            );
8894          }
8895          if (el.attrsMap.hasOwnProperty('v-for')) {
8896            warnOnce(
8897              'Cannot use v-for on stateful component root element because ' +
8898              'it renders multiple elements.'
8899            );
8900          }
8901        }
8902      }
8903
8904      // tree management
8905      if (!root) {
8906        root = element;
8907        checkRootConstraints(root);
8908      } else if (!stack.length) {
8909        // allow root elements with v-if, v-else-if and v-else
8910        if (root.if && (element.elseif || element.else)) {
8911          checkRootConstraints(element);
8912          addIfCondition(root, {
8913            exp: element.elseif,
8914            block: element
8915          });
8916        } else {
8917          warnOnce(
8918            "Component template should contain exactly one root element. " +
8919            "If you are using v-if on multiple elements, " +
8920            "use v-else-if to chain them instead."
8921          );
8922        }
8923      }
8924      if (currentParent && !element.forbidden) {
8925        if (element.elseif || element.else) {
8926          processIfConditions(element, currentParent);
8927        } else if (element.slotScope) { // scoped slot
8928          currentParent.plain = false;
8929          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
8930        } else {
8931          currentParent.children.push(element);
8932          element.parent = currentParent;
8933        }
8934      }
8935      if (!unary) {
8936        currentParent = element;
8937        stack.push(element);
8938      } else {
8939        endPre(element);
8940      }
8941      // apply post-transforms
8942      for (var i$1 = 0; i$1 < postTransforms.length; i$1++) {
8943        postTransforms[i$1](element, options);
8944      }
8945    },
8946
8947    end: function end () {
8948      // remove trailing whitespace
8949      var element = stack[stack.length - 1];
8950      var lastNode = element.children[element.children.length - 1];
8951      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
8952        element.children.pop();
8953      }
8954      // pop stack
8955      stack.length -= 1;
8956      currentParent = stack[stack.length - 1];
8957      endPre(element);
8958    },
8959
8960    chars: function chars (text) {
8961      if (!currentParent) {
8962        {
8963          if (text === template) {
8964            warnOnce(
8965              'Component template requires a root element, rather than just text.'
8966            );
8967          } else if ((text = text.trim())) {
8968            warnOnce(
8969              ("text \"" + text + "\" outside root element will be ignored.")
8970            );
8971          }
8972        }
8973        return
8974      }
8975      // IE textarea placeholder bug
8976      /* istanbul ignore if */
8977      if (isIE &&
8978        currentParent.tag === 'textarea' &&
8979        currentParent.attrsMap.placeholder === text
8980      ) {
8981        return
8982      }
8983      var children = currentParent.children;
8984      text = inPre || text.trim()
8985        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
8986        // only preserve whitespace if its not right after a starting tag
8987        : preserveWhitespace && children.length ? ' ' : '';
8988      if (text) {
8989        var expression;
8990        if (!inVPre && text !== ' ' && (expression = parseText(text, delimiters))) {
8991          children.push({
8992            type: 2,
8993            expression: expression,
8994            text: text
8995          });
8996        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
8997          children.push({
8998            type: 3,
8999            text: text
9000          });
9001        }
9002      }
9003    },
9004    comment: function comment (text) {
9005      currentParent.children.push({
9006        type: 3,
9007        text: text,
9008        isComment: true
9009      });
9010    }
9011  });
9012  return root
9013}
9014
9015function processPre (el) {
9016  if (getAndRemoveAttr(el, 'v-pre') != null) {
9017    el.pre = true;
9018  }
9019}
9020
9021function processRawAttrs (el) {
9022  var l = el.attrsList.length;
9023  if (l) {
9024    var attrs = el.attrs = new Array(l);
9025    for (var i = 0; i < l; i++) {
9026      attrs[i] = {
9027        name: el.attrsList[i].name,
9028        value: JSON.stringify(el.attrsList[i].value)
9029      };
9030    }
9031  } else if (!el.pre) {
9032    // non root node in pre blocks with no attributes
9033    el.plain = true;
9034  }
9035}
9036
9037function processElement (element, options) {
9038  processKey(element);
9039
9040  // determine whether this is a plain element after
9041  // removing structural attributes
9042  element.plain = !element.key && !element.attrsList.length;
9043
9044  processRef(element);
9045  processSlot(element);
9046  processComponent(element);
9047  for (var i = 0; i < transforms.length; i++) {
9048    element = transforms[i](element, options) || element;
9049  }
9050  processAttrs(element);
9051}
9052
9053function processKey (el) {
9054  var exp = getBindingAttr(el, 'key');
9055  if (exp) {
9056    if ("development" !== 'production' && el.tag === 'template') {
9057      warn$2("<template> cannot be keyed. Place the key on real elements instead.");
9058    }
9059    el.key = exp;
9060  }
9061}
9062
9063function processRef (el) {
9064  var ref = getBindingAttr(el, 'ref');
9065  if (ref) {
9066    el.ref = ref;
9067    el.refInFor = checkInFor(el);
9068  }
9069}
9070
9071function processFor (el) {
9072  var exp;
9073  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
9074    var inMatch = exp.match(forAliasRE);
9075    if (!inMatch) {
9076      "development" !== 'production' && warn$2(
9077        ("Invalid v-for expression: " + exp)
9078      );
9079      return
9080    }
9081    el.for = inMatch[2].trim();
9082    var alias = inMatch[1].trim();
9083    var iteratorMatch = alias.match(forIteratorRE);
9084    if (iteratorMatch) {
9085      el.alias = iteratorMatch[1].trim();
9086      el.iterator1 = iteratorMatch[2].trim();
9087      if (iteratorMatch[3]) {
9088        el.iterator2 = iteratorMatch[3].trim();
9089      }
9090    } else {
9091      el.alias = alias;
9092    }
9093  }
9094}
9095
9096function processIf (el) {
9097  var exp = getAndRemoveAttr(el, 'v-if');
9098  if (exp) {
9099    el.if = exp;
9100    addIfCondition(el, {
9101      exp: exp,
9102      block: el
9103    });
9104  } else {
9105    if (getAndRemoveAttr(el, 'v-else') != null) {
9106      el.else = true;
9107    }
9108    var elseif = getAndRemoveAttr(el, 'v-else-if');
9109    if (elseif) {
9110      el.elseif = elseif;
9111    }
9112  }
9113}
9114
9115function processIfConditions (el, parent) {
9116  var prev = findPrevElement(parent.children);
9117  if (prev && prev.if) {
9118    addIfCondition(prev, {
9119      exp: el.elseif,
9120      block: el
9121    });
9122  } else {
9123    warn$2(
9124      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
9125      "used on element <" + (el.tag) + "> without corresponding v-if."
9126    );
9127  }
9128}
9129
9130function findPrevElement (children) {
9131  var i = children.length;
9132  while (i--) {
9133    if (children[i].type === 1) {
9134      return children[i]
9135    } else {
9136      if ("development" !== 'production' && children[i].text !== ' ') {
9137        warn$2(
9138          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
9139          "will be ignored."
9140        );
9141      }
9142      children.pop();
9143    }
9144  }
9145}
9146
9147function addIfCondition (el, condition) {
9148  if (!el.ifConditions) {
9149    el.ifConditions = [];
9150  }
9151  el.ifConditions.push(condition);
9152}
9153
9154function processOnce (el) {
9155  var once$$1 = getAndRemoveAttr(el, 'v-once');
9156  if (once$$1 != null) {
9157    el.once = true;
9158  }
9159}
9160
9161function processSlot (el) {
9162  if (el.tag === 'slot') {
9163    el.slotName = getBindingAttr(el, 'name');
9164    if ("development" !== 'production' && el.key) {
9165      warn$2(
9166        "`key` does not work on <slot> because slots are abstract outlets " +
9167        "and can possibly expand into multiple elements. " +
9168        "Use the key on a wrapping element instead."
9169      );
9170    }
9171  } else {
9172    var slotScope;
9173    if (el.tag === 'template') {
9174      slotScope = getAndRemoveAttr(el, 'scope');
9175      /* istanbul ignore if */
9176      if ("development" !== 'production' && slotScope) {
9177        warn$2(
9178          "the \"scope\" attribute for scoped slots have been deprecated and " +
9179          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
9180          "can also be used on plain elements in addition to <template> to " +
9181          "denote scoped slots.",
9182          true
9183        );
9184      }
9185      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
9186    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
9187      el.slotScope = slotScope;
9188    }
9189    var slotTarget = getBindingAttr(el, 'slot');
9190    if (slotTarget) {
9191      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
9192      // preserve slot as an attribute for native shadow DOM compat
9193      // only for non-scoped slots.
9194      if (el.tag !== 'template' && !el.slotScope) {
9195        addAttr(el, 'slot', slotTarget);
9196      }
9197    }
9198  }
9199}
9200
9201function processComponent (el) {
9202  var binding;
9203  if ((binding = getBindingAttr(el, 'is'))) {
9204    el.component = binding;
9205  }
9206  if (getAndRemoveAttr(el, 'inline-template') != null) {
9207    el.inlineTemplate = true;
9208  }
9209}
9210
9211function processAttrs (el) {
9212  var list = el.attrsList;
9213  var i, l, name, rawName, value, modifiers, isProp;
9214  for (i = 0, l = list.length; i < l; i++) {
9215    name = rawName = list[i].name;
9216    value = list[i].value;
9217    if (dirRE.test(name)) {
9218      // mark element as dynamic
9219      el.hasBindings = true;
9220      // modifiers
9221      modifiers = parseModifiers(name);
9222      if (modifiers) {
9223        name = name.replace(modifierRE, '');
9224      }
9225      if (bindRE.test(name)) { // v-bind
9226        name = name.replace(bindRE, '');
9227        value = parseFilters(value);
9228        isProp = false;
9229        if (modifiers) {
9230          if (modifiers.prop) {
9231            isProp = true;
9232            name = camelize(name);
9233            if (name === 'innerHtml') { name = 'innerHTML'; }
9234          }
9235          if (modifiers.camel) {
9236            name = camelize(name);
9237          }
9238          if (modifiers.sync) {
9239            addHandler(
9240              el,
9241              ("update:" + (camelize(name))),
9242              genAssignmentCode(value, "$event")
9243            );
9244          }
9245        }
9246        if (isProp || (
9247          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
9248        )) {
9249          addProp(el, name, value);
9250        } else {
9251          addAttr(el, name, value);
9252        }
9253      } else if (onRE.test(name)) { // v-on
9254        name = name.replace(onRE, '');
9255        addHandler(el, name, value, modifiers, false, warn$2);
9256      } else { // normal directives
9257        name = name.replace(dirRE, '');
9258        // parse arg
9259        var argMatch = name.match(argRE);
9260        var arg = argMatch && argMatch[1];
9261        if (arg) {
9262          name = name.slice(0, -(arg.length + 1));
9263        }
9264        addDirective(el, name, rawName, value, arg, modifiers);
9265        if ("development" !== 'production' && name === 'model') {
9266          checkForAliasModel(el, value);
9267        }
9268      }
9269    } else {
9270      // literal attribute
9271      {
9272        var expression = parseText(value, delimiters);
9273        if (expression) {
9274          warn$2(
9275            name + "=\"" + value + "\": " +
9276            'Interpolation inside attributes has been removed. ' +
9277            'Use v-bind or the colon shorthand instead. For example, ' +
9278            'instead of <div id="{{ val }}">, use <div :id="val">.'
9279          );
9280        }
9281      }
9282      addAttr(el, name, JSON.stringify(value));
9283      // #6887 firefox doesn't update muted state if set via attribute
9284      // even immediately after element creation
9285      if (!el.component &&
9286          name === 'muted' &&
9287          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
9288        addProp(el, name, 'true');
9289      }
9290    }
9291  }
9292}
9293
9294function checkInFor (el) {
9295  var parent = el;
9296  while (parent) {
9297    if (parent.for !== undefined) {
9298      return true
9299    }
9300    parent = parent.parent;
9301  }
9302  return false
9303}
9304
9305function parseModifiers (name) {
9306  var match = name.match(modifierRE);
9307  if (match) {
9308    var ret = {};
9309    match.forEach(function (m) { ret[m.slice(1)] = true; });
9310    return ret
9311  }
9312}
9313
9314function makeAttrsMap (attrs) {
9315  var map = {};
9316  for (var i = 0, l = attrs.length; i < l; i++) {
9317    if (
9318      "development" !== 'production' &&
9319      map[attrs[i].name] && !isIE && !isEdge
9320    ) {
9321      warn$2('duplicate attribute: ' + attrs[i].name);
9322    }
9323    map[attrs[i].name] = attrs[i].value;
9324  }
9325  return map
9326}
9327
9328// for script (e.g. type="x/template") or style, do not decode content
9329function isTextTag (el) {
9330  return el.tag === 'script' || el.tag === 'style'
9331}
9332
9333function isForbiddenTag (el) {
9334  return (
9335    el.tag === 'style' ||
9336    (el.tag === 'script' && (
9337      !el.attrsMap.type ||
9338      el.attrsMap.type === 'text/javascript'
9339    ))
9340  )
9341}
9342
9343var ieNSBug = /^xmlns:NS\d+/;
9344var ieNSPrefix = /^NS\d+:/;
9345
9346/* istanbul ignore next */
9347function guardIESVGBug (attrs) {
9348  var res = [];
9349  for (var i = 0; i < attrs.length; i++) {
9350    var attr = attrs[i];
9351    if (!ieNSBug.test(attr.name)) {
9352      attr.name = attr.name.replace(ieNSPrefix, '');
9353      res.push(attr);
9354    }
9355  }
9356  return res
9357}
9358
9359function checkForAliasModel (el, value) {
9360  var _el = el;
9361  while (_el) {
9362    if (_el.for && _el.alias === value) {
9363      warn$2(
9364        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
9365        "You are binding v-model directly to a v-for iteration alias. " +
9366        "This will not be able to modify the v-for source array because " +
9367        "writing to the alias is like modifying a function local variable. " +
9368        "Consider using an array of objects and use v-model on an object property instead."
9369      );
9370    }
9371    _el = _el.parent;
9372  }
9373}
9374
9375/*  */
9376
9377/**
9378 * Expand input[v-model] with dyanmic type bindings into v-if-else chains
9379 * Turn this:
9380 *   <input v-model="data[type]" :type="type">
9381 * into this:
9382 *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
9383 *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
9384 *   <input v-else :type="type" v-model="data[type]">
9385 */
9386
9387function preTransformNode (el, options) {
9388  if (el.tag === 'input') {
9389    var map = el.attrsMap;
9390    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
9391      var typeBinding = getBindingAttr(el, 'type');
9392      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
9393      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
9394      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
9395      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
9396      // 1. checkbox
9397      var branch0 = cloneASTElement(el);
9398      // process for on the main node
9399      processFor(branch0);
9400      addRawAttr(branch0, 'type', 'checkbox');
9401      processElement(branch0, options);
9402      branch0.processed = true; // prevent it from double-processed
9403      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
9404      addIfCondition(branch0, {
9405        exp: branch0.if,
9406        block: branch0
9407      });
9408      // 2. add radio else-if condition
9409      var branch1 = cloneASTElement(el);
9410      getAndRemoveAttr(branch1, 'v-for', true);
9411      addRawAttr(branch1, 'type', 'radio');
9412      processElement(branch1, options);
9413      addIfCondition(branch0, {
9414        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
9415        block: branch1
9416      });
9417      // 3. other
9418      var branch2 = cloneASTElement(el);
9419      getAndRemoveAttr(branch2, 'v-for', true);
9420      addRawAttr(branch2, ':type', typeBinding);
9421      processElement(branch2, options);
9422      addIfCondition(branch0, {
9423        exp: ifCondition,
9424        block: branch2
9425      });
9426
9427      if (hasElse) {
9428        branch0.else = true;
9429      } else if (elseIfCondition) {
9430        branch0.elseif = elseIfCondition;
9431      }
9432
9433      return branch0
9434    }
9435  }
9436}
9437
9438function cloneASTElement (el) {
9439  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
9440}
9441
9442function addRawAttr (el, name, value) {
9443  el.attrsMap[name] = value;
9444  el.attrsList.push({ name: name, value: value });
9445}
9446
9447var model$2 = {
9448  preTransformNode: preTransformNode
9449};
9450
9451var modules$1 = [
9452  klass$1,
9453  style$1,
9454  model$2
9455];
9456
9457/*  */
9458
9459function text (el, dir) {
9460  if (dir.value) {
9461    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
9462  }
9463}
9464
9465/*  */
9466
9467function html (el, dir) {
9468  if (dir.value) {
9469    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
9470  }
9471}
9472
9473var directives$1 = {
9474  model: model,
9475  text: text,
9476  html: html
9477};
9478
9479/*  */
9480
9481var baseOptions = {
9482  expectHTML: true,
9483  modules: modules$1,
9484  directives: directives$1,
9485  isPreTag: isPreTag,
9486  isUnaryTag: isUnaryTag,
9487  mustUseProp: mustUseProp,
9488  canBeLeftOpenTag: canBeLeftOpenTag,
9489  isReservedTag: isReservedTag,
9490  getTagNamespace: getTagNamespace,
9491  staticKeys: genStaticKeys(modules$1)
9492};
9493
9494/*  */
9495
9496var isStaticKey;
9497var isPlatformReservedTag;
9498
9499var genStaticKeysCached = cached(genStaticKeys$1);
9500
9501/**
9502 * Goal of the optimizer: walk the generated template AST tree
9503 * and detect sub-trees that are purely static, i.e. parts of
9504 * the DOM that never needs to change.
9505 *
9506 * Once we detect these sub-trees, we can:
9507 *
9508 * 1. Hoist them into constants, so that we no longer need to
9509 *    create fresh nodes for them on each re-render;
9510 * 2. Completely skip them in the patching process.
9511 */
9512function optimize (root, options) {
9513  if (!root) { return }
9514  isStaticKey = genStaticKeysCached(options.staticKeys || '');
9515  isPlatformReservedTag = options.isReservedTag || no;
9516  // first pass: mark all non-static nodes.
9517  markStatic$1(root);
9518  // second pass: mark static roots.
9519  markStaticRoots(root, false);
9520}
9521
9522function genStaticKeys$1 (keys) {
9523  return makeMap(
9524    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
9525    (keys ? ',' + keys : '')
9526  )
9527}
9528
9529function markStatic$1 (node) {
9530  node.static = isStatic(node);
9531  if (node.type === 1) {
9532    // do not make component slot content static. this avoids
9533    // 1. components not able to mutate slot nodes
9534    // 2. static slot content fails for hot-reloading
9535    if (
9536      !isPlatformReservedTag(node.tag) &&
9537      node.tag !== 'slot' &&
9538      node.attrsMap['inline-template'] == null
9539    ) {
9540      return
9541    }
9542    for (var i = 0, l = node.children.length; i < l; i++) {
9543      var child = node.children[i];
9544      markStatic$1(child);
9545      if (!child.static) {
9546        node.static = false;
9547      }
9548    }
9549    if (node.ifConditions) {
9550      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
9551        var block = node.ifConditions[i$1].block;
9552        markStatic$1(block);
9553        if (!block.static) {
9554          node.static = false;
9555        }
9556      }
9557    }
9558  }
9559}
9560
9561function markStaticRoots (node, isInFor) {
9562  if (node.type === 1) {
9563    if (node.static || node.once) {
9564      node.staticInFor = isInFor;
9565    }
9566    // For a node to qualify as a static root, it should have children that
9567    // are not just static text. Otherwise the cost of hoisting out will
9568    // outweigh the benefits and it's better off to just always render it fresh.
9569    if (node.static && node.children.length && !(
9570      node.children.length === 1 &&
9571      node.children[0].type === 3
9572    )) {
9573      node.staticRoot = true;
9574      return
9575    } else {
9576      node.staticRoot = false;
9577    }
9578    if (node.children) {
9579      for (var i = 0, l = node.children.length; i < l; i++) {
9580        markStaticRoots(node.children[i], isInFor || !!node.for);
9581      }
9582    }
9583    if (node.ifConditions) {
9584      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
9585        markStaticRoots(node.ifConditions[i$1].block, isInFor);
9586      }
9587    }
9588  }
9589}
9590
9591function isStatic (node) {
9592  if (node.type === 2) { // expression
9593    return false
9594  }
9595  if (node.type === 3) { // text
9596    return true
9597  }
9598  return !!(node.pre || (
9599    !node.hasBindings && // no dynamic bindings
9600    !node.if && !node.for && // not v-if or v-for or v-else
9601    !isBuiltInTag(node.tag) && // not a built-in
9602    isPlatformReservedTag(node.tag) && // not a component
9603    !isDirectChildOfTemplateFor(node) &&
9604    Object.keys(node).every(isStaticKey)
9605  ))
9606}
9607
9608function isDirectChildOfTemplateFor (node) {
9609  while (node.parent) {
9610    node = node.parent;
9611    if (node.tag !== 'template') {
9612      return false
9613    }
9614    if (node.for) {
9615      return true
9616    }
9617  }
9618  return false
9619}
9620
9621/*  */
9622
9623var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
9624var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
9625
9626// keyCode aliases
9627var keyCodes = {
9628  esc: 27,
9629  tab: 9,
9630  enter: 13,
9631  space: 32,
9632  up: 38,
9633  left: 37,
9634  right: 39,
9635  down: 40,
9636  'delete': [8, 46]
9637};
9638
9639// #4868: modifiers that prevent the execution of the listener
9640// need to explicitly return null so that we can determine whether to remove
9641// the listener for .once
9642var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
9643
9644var modifierCode = {
9645  stop: '$event.stopPropagation();',
9646  prevent: '$event.preventDefault();',
9647  self: genGuard("$event.target !== $event.currentTarget"),
9648  ctrl: genGuard("!$event.ctrlKey"),
9649  shift: genGuard("!$event.shiftKey"),
9650  alt: genGuard("!$event.altKey"),
9651  meta: genGuard("!$event.metaKey"),
9652  left: genGuard("'button' in $event && $event.button !== 0"),
9653  middle: genGuard("'button' in $event && $event.button !== 1"),
9654  right: genGuard("'button' in $event && $event.button !== 2")
9655};
9656
9657function genHandlers (
9658  events,
9659  isNative,
9660  warn
9661) {
9662  var res = isNative ? 'nativeOn:{' : 'on:{';
9663  for (var name in events) {
9664    var handler = events[name];
9665    // #5330: warn click.right, since right clicks do not actually fire click events.
9666    if ("development" !== 'production' &&
9667      name === 'click' &&
9668      handler && handler.modifiers && handler.modifiers.right
9669    ) {
9670      warn(
9671        "Use \"contextmenu\" instead of \"click.right\" since right clicks " +
9672        "do not actually fire \"click\" events."
9673      );
9674    }
9675    res += "\"" + name + "\":" + (genHandler(name, handler)) + ",";
9676  }
9677  return res.slice(0, -1) + '}'
9678}
9679
9680function genHandler (
9681  name,
9682  handler
9683) {
9684  if (!handler) {
9685    return 'function(){}'
9686  }
9687
9688  if (Array.isArray(handler)) {
9689    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
9690  }
9691
9692  var isMethodPath = simplePathRE.test(handler.value);
9693  var isFunctionExpression = fnExpRE.test(handler.value);
9694
9695  if (!handler.modifiers) {
9696    return isMethodPath || isFunctionExpression
9697      ? handler.value
9698      : ("function($event){" + (handler.value) + "}") // inline statement
9699  } else {
9700    var code = '';
9701    var genModifierCode = '';
9702    var keys = [];
9703    for (var key in handler.modifiers) {
9704      if (modifierCode[key]) {
9705        genModifierCode += modifierCode[key];
9706        // left/right
9707        if (keyCodes[key]) {
9708          keys.push(key);
9709        }
9710      } else if (key === 'exact') {
9711        var modifiers = (handler.modifiers);
9712        genModifierCode += genGuard(
9713          ['ctrl', 'shift', 'alt', 'meta']
9714            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
9715            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
9716            .join('||')
9717        );
9718      } else {
9719        keys.push(key);
9720      }
9721    }
9722    if (keys.length) {
9723      code += genKeyFilter(keys);
9724    }
9725    // Make sure modifiers like prevent and stop get executed after key filtering
9726    if (genModifierCode) {
9727      code += genModifierCode;
9728    }
9729    var handlerCode = isMethodPath
9730      ? handler.value + '($event)'
9731      : isFunctionExpression
9732        ? ("(" + (handler.value) + ")($event)")
9733        : handler.value;
9734    return ("function($event){" + code + handlerCode + "}")
9735  }
9736}
9737
9738function genKeyFilter (keys) {
9739  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
9740}
9741
9742function genFilterCode (key) {
9743  var keyVal = parseInt(key, 10);
9744  if (keyVal) {
9745    return ("$event.keyCode!==" + keyVal)
9746  }
9747  var code = keyCodes[key];
9748  return (
9749    "_k($event.keyCode," +
9750    (JSON.stringify(key)) + "," +
9751    (JSON.stringify(code)) + "," +
9752    "$event.key)"
9753  )
9754}
9755
9756/*  */
9757
9758function on (el, dir) {
9759  if ("development" !== 'production' && dir.modifiers) {
9760    warn("v-on without argument does not support modifiers.");
9761  }
9762  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
9763}
9764
9765/*  */
9766
9767function bind$1 (el, dir) {
9768  el.wrapData = function (code) {
9769    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
9770  };
9771}
9772
9773/*  */
9774
9775var baseDirectives = {
9776  on: on,
9777  bind: bind$1,
9778  cloak: noop
9779};
9780
9781/*  */
9782
9783var CodegenState = function CodegenState (options) {
9784  this.options = options;
9785  this.warn = options.warn || baseWarn;
9786  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
9787  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
9788  this.directives = extend(extend({}, baseDirectives), options.directives);
9789  var isReservedTag = options.isReservedTag || no;
9790  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
9791  this.onceId = 0;
9792  this.staticRenderFns = [];
9793};
9794
9795
9796
9797function generate (
9798  ast,
9799  options
9800) {
9801  var state = new CodegenState(options);
9802  var code = ast ? genElement(ast, state) : '_c("div")';
9803  return {
9804    render: ("with(this){return " + code + "}"),
9805    staticRenderFns: state.staticRenderFns
9806  }
9807}
9808
9809function genElement (el, state) {
9810  if (el.staticRoot && !el.staticProcessed) {
9811    return genStatic(el, state)
9812  } else if (el.once && !el.onceProcessed) {
9813    return genOnce(el, state)
9814  } else if (el.for && !el.forProcessed) {
9815    return genFor(el, state)
9816  } else if (el.if && !el.ifProcessed) {
9817    return genIf(el, state)
9818  } else if (el.tag === 'template' && !el.slotTarget) {
9819    return genChildren(el, state) || 'void 0'
9820  } else if (el.tag === 'slot') {
9821    return genSlot(el, state)
9822  } else {
9823    // component or element
9824    var code;
9825    if (el.component) {
9826      code = genComponent(el.component, el, state);
9827    } else {
9828      var data = el.plain ? undefined : genData$2(el, state);
9829
9830      var children = el.inlineTemplate ? null : genChildren(el, state, true);
9831      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
9832    }
9833    // module transforms
9834    for (var i = 0; i < state.transforms.length; i++) {
9835      code = state.transforms[i](el, code);
9836    }
9837    return code
9838  }
9839}
9840
9841// hoist static sub-trees out
9842function genStatic (el, state) {
9843  el.staticProcessed = true;
9844  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
9845  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
9846}
9847
9848// v-once
9849function genOnce (el, state) {
9850  el.onceProcessed = true;
9851  if (el.if && !el.ifProcessed) {
9852    return genIf(el, state)
9853  } else if (el.staticInFor) {
9854    var key = '';
9855    var parent = el.parent;
9856    while (parent) {
9857      if (parent.for) {
9858        key = parent.key;
9859        break
9860      }
9861      parent = parent.parent;
9862    }
9863    if (!key) {
9864      "development" !== 'production' && state.warn(
9865        "v-once can only be used inside v-for that is keyed. "
9866      );
9867      return genElement(el, state)
9868    }
9869    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
9870  } else {
9871    return genStatic(el, state)
9872  }
9873}
9874
9875function genIf (
9876  el,
9877  state,
9878  altGen,
9879  altEmpty
9880) {
9881  el.ifProcessed = true; // avoid recursion
9882  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
9883}
9884
9885function genIfConditions (
9886  conditions,
9887  state,
9888  altGen,
9889  altEmpty
9890) {
9891  if (!conditions.length) {
9892    return altEmpty || '_e()'
9893  }
9894
9895  var condition = conditions.shift();
9896  if (condition.exp) {
9897    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
9898  } else {
9899    return ("" + (genTernaryExp(condition.block)))
9900  }
9901
9902  // v-if with v-once should generate code like (a)?_m(0):_m(1)
9903  function genTernaryExp (el) {
9904    return altGen
9905      ? altGen(el, state)
9906      : el.once
9907        ? genOnce(el, state)
9908        : genElement(el, state)
9909  }
9910}
9911
9912function genFor (
9913  el,
9914  state,
9915  altGen,
9916  altHelper
9917) {
9918  var exp = el.for;
9919  var alias = el.alias;
9920  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
9921  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
9922
9923  if ("development" !== 'production' &&
9924    state.maybeComponent(el) &&
9925    el.tag !== 'slot' &&
9926    el.tag !== 'template' &&
9927    !el.key
9928  ) {
9929    state.warn(
9930      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
9931      "v-for should have explicit keys. " +
9932      "See https://vuejs.org/guide/list.html#key for more info.",
9933      true /* tip */
9934    );
9935  }
9936
9937  el.forProcessed = true; // avoid recursion
9938  return (altHelper || '_l') + "((" + exp + ")," +
9939    "function(" + alias + iterator1 + iterator2 + "){" +
9940      "return " + ((altGen || genElement)(el, state)) +
9941    '})'
9942}
9943
9944function genData$2 (el, state) {
9945  var data = '{';
9946
9947  // directives first.
9948  // directives may mutate the el's other properties before they are generated.
9949  var dirs = genDirectives(el, state);
9950  if (dirs) { data += dirs + ','; }
9951
9952  // key
9953  if (el.key) {
9954    data += "key:" + (el.key) + ",";
9955  }
9956  // ref
9957  if (el.ref) {
9958    data += "ref:" + (el.ref) + ",";
9959  }
9960  if (el.refInFor) {
9961    data += "refInFor:true,";
9962  }
9963  // pre
9964  if (el.pre) {
9965    data += "pre:true,";
9966  }
9967  // record original tag name for components using "is" attribute
9968  if (el.component) {
9969    data += "tag:\"" + (el.tag) + "\",";
9970  }
9971  // module data generation functions
9972  for (var i = 0; i < state.dataGenFns.length; i++) {
9973    data += state.dataGenFns[i](el);
9974  }
9975  // attributes
9976  if (el.attrs) {
9977    data += "attrs:{" + (genProps(el.attrs)) + "},";
9978  }
9979  // DOM props
9980  if (el.props) {
9981    data += "domProps:{" + (genProps(el.props)) + "},";
9982  }
9983  // event handlers
9984  if (el.events) {
9985    data += (genHandlers(el.events, false, state.warn)) + ",";
9986  }
9987  if (el.nativeEvents) {
9988    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
9989  }
9990  // slot target
9991  // only for non-scoped slots
9992  if (el.slotTarget && !el.slotScope) {
9993    data += "slot:" + (el.slotTarget) + ",";
9994  }
9995  // scoped slots
9996  if (el.scopedSlots) {
9997    data += (genScopedSlots(el.scopedSlots, state)) + ",";
9998  }
9999  // component v-model
10000  if (el.model) {
10001    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
10002  }
10003  // inline-template
10004  if (el.inlineTemplate) {
10005    var inlineTemplate = genInlineTemplate(el, state);
10006    if (inlineTemplate) {
10007      data += inlineTemplate + ",";
10008    }
10009  }
10010  data = data.replace(/,$/, '') + '}';
10011  // v-bind data wrap
10012  if (el.wrapData) {
10013    data = el.wrapData(data);
10014  }
10015  // v-on data wrap
10016  if (el.wrapListeners) {
10017    data = el.wrapListeners(data);
10018  }
10019  return data
10020}
10021
10022function genDirectives (el, state) {
10023  var dirs = el.directives;
10024  if (!dirs) { return }
10025  var res = 'directives:[';
10026  var hasRuntime = false;
10027  var i, l, dir, needRuntime;
10028  for (i = 0, l = dirs.length; i < l; i++) {
10029    dir = dirs[i];
10030    needRuntime = true;
10031    var gen = state.directives[dir.name];
10032    if (gen) {
10033      // compile-time directive that manipulates AST.
10034      // returns true if it also needs a runtime counterpart.
10035      needRuntime = !!gen(el, dir, state.warn);
10036    }
10037    if (needRuntime) {
10038      hasRuntime = true;
10039      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
10040    }
10041  }
10042  if (hasRuntime) {
10043    return res.slice(0, -1) + ']'
10044  }
10045}
10046
10047function genInlineTemplate (el, state) {
10048  var ast = el.children[0];
10049  if ("development" !== 'production' && (
10050    el.children.length !== 1 || ast.type !== 1
10051  )) {
10052    state.warn('Inline-template components must have exactly one child element.');
10053  }
10054  if (ast.type === 1) {
10055    var inlineRenderFns = generate(ast, state.options);
10056    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
10057  }
10058}
10059
10060function genScopedSlots (
10061  slots,
10062  state
10063) {
10064  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
10065      return genScopedSlot(key, slots[key], state)
10066    }).join(',')) + "])")
10067}
10068
10069function genScopedSlot (
10070  key,
10071  el,
10072  state
10073) {
10074  if (el.for && !el.forProcessed) {
10075    return genForScopedSlot(key, el, state)
10076  }
10077  var fn = "function(" + (String(el.slotScope)) + "){" +
10078    "return " + (el.tag === 'template'
10079      ? el.if
10080        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
10081        : genChildren(el, state) || 'undefined'
10082      : genElement(el, state)) + "}";
10083  return ("{key:" + key + ",fn:" + fn + "}")
10084}
10085
10086function genForScopedSlot (
10087  key,
10088  el,
10089  state
10090) {
10091  var exp = el.for;
10092  var alias = el.alias;
10093  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
10094  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
10095  el.forProcessed = true; // avoid recursion
10096  return "_l((" + exp + ")," +
10097    "function(" + alias + iterator1 + iterator2 + "){" +
10098      "return " + (genScopedSlot(key, el, state)) +
10099    '})'
10100}
10101
10102function genChildren (
10103  el,
10104  state,
10105  checkSkip,
10106  altGenElement,
10107  altGenNode
10108) {
10109  var children = el.children;
10110  if (children.length) {
10111    var el$1 = children[0];
10112    // optimize single v-for
10113    if (children.length === 1 &&
10114      el$1.for &&
10115      el$1.tag !== 'template' &&
10116      el$1.tag !== 'slot'
10117    ) {
10118      return (altGenElement || genElement)(el$1, state)
10119    }
10120    var normalizationType = checkSkip
10121      ? getNormalizationType(children, state.maybeComponent)
10122      : 0;
10123    var gen = altGenNode || genNode;
10124    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
10125  }
10126}
10127
10128// determine the normalization needed for the children array.
10129// 0: no normalization needed
10130// 1: simple normalization needed (possible 1-level deep nested array)
10131// 2: full normalization needed
10132function getNormalizationType (
10133  children,
10134  maybeComponent
10135) {
10136  var res = 0;
10137  for (var i = 0; i < children.length; i++) {
10138    var el = children[i];
10139    if (el.type !== 1) {
10140      continue
10141    }
10142    if (needsNormalization(el) ||
10143        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
10144      res = 2;
10145      break
10146    }
10147    if (maybeComponent(el) ||
10148        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
10149      res = 1;
10150    }
10151  }
10152  return res
10153}
10154
10155function needsNormalization (el) {
10156  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
10157}
10158
10159function genNode (node, state) {
10160  if (node.type === 1) {
10161    return genElement(node, state)
10162  } if (node.type === 3 && node.isComment) {
10163    return genComment(node)
10164  } else {
10165    return genText(node)
10166  }
10167}
10168
10169function genText (text) {
10170  return ("_v(" + (text.type === 2
10171    ? text.expression // no need for () because already wrapped in _s()
10172    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
10173}
10174
10175function genComment (comment) {
10176  return ("_e(" + (JSON.stringify(comment.text)) + ")")
10177}
10178
10179function genSlot (el, state) {
10180  var slotName = el.slotName || '"default"';
10181  var children = genChildren(el, state);
10182  var res = "_t(" + slotName + (children ? ("," + children) : '');
10183  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
10184  var bind$$1 = el.attrsMap['v-bind'];
10185  if ((attrs || bind$$1) && !children) {
10186    res += ",null";
10187  }
10188  if (attrs) {
10189    res += "," + attrs;
10190  }
10191  if (bind$$1) {
10192    res += (attrs ? '' : ',null') + "," + bind$$1;
10193  }
10194  return res + ')'
10195}
10196
10197// componentName is el.component, take it as argument to shun flow's pessimistic refinement
10198function genComponent (
10199  componentName,
10200  el,
10201  state
10202) {
10203  var children = el.inlineTemplate ? null : genChildren(el, state, true);
10204  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
10205}
10206
10207function genProps (props) {
10208  var res = '';
10209  for (var i = 0; i < props.length; i++) {
10210    var prop = props[i];
10211    res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
10212  }
10213  return res.slice(0, -1)
10214}
10215
10216// #3895, #4268
10217function transformSpecialNewlines (text) {
10218  return text
10219    .replace(/\u2028/g, '\\u2028')
10220    .replace(/\u2029/g, '\\u2029')
10221}
10222
10223/*  */
10224
10225// these keywords should not appear inside expressions, but operators like
10226// typeof, instanceof and in are allowed
10227var prohibitedKeywordRE = new RegExp('\\b' + (
10228  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
10229  'super,throw,while,yield,delete,export,import,return,switch,default,' +
10230  'extends,finally,continue,debugger,function,arguments'
10231).split(',').join('\\b|\\b') + '\\b');
10232
10233// these unary operators should not be used as property/method names
10234var unaryOperatorsRE = new RegExp('\\b' + (
10235  'delete,typeof,void'
10236).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
10237
10238// check valid identifier for v-for
10239var identRE = /[A-Za-z_$][\w$]*/;
10240
10241// strip strings in expressions
10242var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
10243
10244// detect problematic expressions in a template
10245function detectErrors (ast) {
10246  var errors = [];
10247  if (ast) {
10248    checkNode(ast, errors);
10249  }
10250  return errors
10251}
10252
10253function checkNode (node, errors) {
10254  if (node.type === 1) {
10255    for (var name in node.attrsMap) {
10256      if (dirRE.test(name)) {
10257        var value = node.attrsMap[name];
10258        if (value) {
10259          if (name === 'v-for') {
10260            checkFor(node, ("v-for=\"" + value + "\""), errors);
10261          } else if (onRE.test(name)) {
10262            checkEvent(value, (name + "=\"" + value + "\""), errors);
10263          } else {
10264            checkExpression(value, (name + "=\"" + value + "\""), errors);
10265          }
10266        }
10267      }
10268    }
10269    if (node.children) {
10270      for (var i = 0; i < node.children.length; i++) {
10271        checkNode(node.children[i], errors);
10272      }
10273    }
10274  } else if (node.type === 2) {
10275    checkExpression(node.expression, node.text, errors);
10276  }
10277}
10278
10279function checkEvent (exp, text, errors) {
10280  var stipped = exp.replace(stripStringRE, '');
10281  var keywordMatch = stipped.match(unaryOperatorsRE);
10282  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
10283    errors.push(
10284      "avoid using JavaScript unary operator as property name: " +
10285      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
10286    );
10287  }
10288  checkExpression(exp, text, errors);
10289}
10290
10291function checkFor (node, text, errors) {
10292  checkExpression(node.for || '', text, errors);
10293  checkIdentifier(node.alias, 'v-for alias', text, errors);
10294  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
10295  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
10296}
10297
10298function checkIdentifier (ident, type, text, errors) {
10299  if (typeof ident === 'string' && !identRE.test(ident)) {
10300    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
10301  }
10302}
10303
10304function checkExpression (exp, text, errors) {
10305  try {
10306    new Function(("return " + exp));
10307  } catch (e) {
10308    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
10309    if (keywordMatch) {
10310      errors.push(
10311        "avoid using JavaScript keyword as property name: " +
10312        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
10313      );
10314    } else {
10315      errors.push(
10316        "invalid expression: " + (e.message) + " in\n\n" +
10317        "    " + exp + "\n\n" +
10318        "  Raw expression: " + (text.trim()) + "\n"
10319      );
10320    }
10321  }
10322}
10323
10324/*  */
10325
10326function createFunction (code, errors) {
10327  try {
10328    return new Function(code)
10329  } catch (err) {
10330    errors.push({ err: err, code: code });
10331    return noop
10332  }
10333}
10334
10335function createCompileToFunctionFn (compile) {
10336  var cache = Object.create(null);
10337
10338  return function compileToFunctions (
10339    template,
10340    options,
10341    vm
10342  ) {
10343    options = extend({}, options);
10344    var warn$$1 = options.warn || warn;
10345    delete options.warn;
10346
10347    /* istanbul ignore if */
10348    {
10349      // detect possible CSP restriction
10350      try {
10351        new Function('return 1');
10352      } catch (e) {
10353        if (e.toString().match(/unsafe-eval|CSP/)) {
10354          warn$$1(
10355            'It seems you are using the standalone build of Vue.js in an ' +
10356            'environment with Content Security Policy that prohibits unsafe-eval. ' +
10357            'The template compiler cannot work in this environment. Consider ' +
10358            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
10359            'templates into render functions.'
10360          );
10361        }
10362      }
10363    }
10364
10365    // check cache
10366    var key = options.delimiters
10367      ? String(options.delimiters) + template
10368      : template;
10369    if (cache[key]) {
10370      return cache[key]
10371    }
10372
10373    // compile
10374    var compiled = compile(template, options);
10375
10376    // check compilation errors/tips
10377    {
10378      if (compiled.errors && compiled.errors.length) {
10379        warn$$1(
10380          "Error compiling template:\n\n" + template + "\n\n" +
10381          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
10382          vm
10383        );
10384      }
10385      if (compiled.tips && compiled.tips.length) {
10386        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
10387      }
10388    }
10389
10390    // turn code into functions
10391    var res = {};
10392    var fnGenErrors = [];
10393    res.render = createFunction(compiled.render, fnGenErrors);
10394    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
10395      return createFunction(code, fnGenErrors)
10396    });
10397
10398    // check function generation errors.
10399    // this should only happen if there is a bug in the compiler itself.
10400    // mostly for codegen development use
10401    /* istanbul ignore if */
10402    {
10403      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
10404        warn$$1(
10405          "Failed to generate render function:\n\n" +
10406          fnGenErrors.map(function (ref) {
10407            var err = ref.err;
10408            var code = ref.code;
10409
10410            return ((err.toString()) + " in\n\n" + code + "\n");
10411        }).join('\n'),
10412          vm
10413        );
10414      }
10415    }
10416
10417    return (cache[key] = res)
10418  }
10419}
10420
10421/*  */
10422
10423function createCompilerCreator (baseCompile) {
10424  return function createCompiler (baseOptions) {
10425    function compile (
10426      template,
10427      options
10428    ) {
10429      var finalOptions = Object.create(baseOptions);
10430      var errors = [];
10431      var tips = [];
10432      finalOptions.warn = function (msg, tip) {
10433        (tip ? tips : errors).push(msg);
10434      };
10435
10436      if (options) {
10437        // merge custom modules
10438        if (options.modules) {
10439          finalOptions.modules =
10440            (baseOptions.modules || []).concat(options.modules);
10441        }
10442        // merge custom directives
10443        if (options.directives) {
10444          finalOptions.directives = extend(
10445            Object.create(baseOptions.directives),
10446            options.directives
10447          );
10448        }
10449        // copy other options
10450        for (var key in options) {
10451          if (key !== 'modules' && key !== 'directives') {
10452            finalOptions[key] = options[key];
10453          }
10454        }
10455      }
10456
10457      var compiled = baseCompile(template, finalOptions);
10458      {
10459        errors.push.apply(errors, detectErrors(compiled.ast));
10460      }
10461      compiled.errors = errors;
10462      compiled.tips = tips;
10463      return compiled
10464    }
10465
10466    return {
10467      compile: compile,
10468      compileToFunctions: createCompileToFunctionFn(compile)
10469    }
10470  }
10471}
10472
10473/*  */
10474
10475// `createCompilerCreator` allows creating compilers that use alternative
10476// parser/optimizer/codegen, e.g the SSR optimizing compiler.
10477// Here we just export a default compiler using the default parts.
10478var createCompiler = createCompilerCreator(function baseCompile (
10479  template,
10480  options
10481) {
10482  var ast = parse(template.trim(), options);
10483  optimize(ast, options);
10484  var code = generate(ast, options);
10485  return {
10486    ast: ast,
10487    render: code.render,
10488    staticRenderFns: code.staticRenderFns
10489  }
10490});
10491
10492/*  */
10493
10494var ref$1 = createCompiler(baseOptions);
10495var compileToFunctions = ref$1.compileToFunctions;
10496
10497/*  */
10498
10499// check whether current browser encodes a char inside attribute values
10500var div;
10501function getShouldDecode (href) {
10502  div = div || document.createElement('div');
10503  div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
10504  return div.innerHTML.indexOf('&#10;') > 0
10505}
10506
10507// #3663: IE encodes newlines inside attribute values while other browsers don't
10508var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
10509// #6828: chrome encodes content in a[href]
10510var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
10511
10512/*  */
10513
10514var idToTemplate = cached(function (id) {
10515  var el = query(id);
10516  return el && el.innerHTML
10517});
10518
10519var mount = Vue$3.prototype.$mount;
10520Vue$3.prototype.$mount = function (
10521  el,
10522  hydrating
10523) {
10524  el = el && query(el);
10525
10526  /* istanbul ignore if */
10527  if (el === document.body || el === document.documentElement) {
10528    "development" !== 'production' && warn(
10529      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
10530    );
10531    return this
10532  }
10533
10534  var options = this.$options;
10535  // resolve template/el and convert to render function
10536  if (!options.render) {
10537    var template = options.template;
10538    if (template) {
10539      if (typeof template === 'string') {
10540        if (template.charAt(0) === '#') {
10541          template = idToTemplate(template);
10542          /* istanbul ignore if */
10543          if ("development" !== 'production' && !template) {
10544            warn(
10545              ("Template element not found or is empty: " + (options.template)),
10546              this
10547            );
10548          }
10549        }
10550      } else if (template.nodeType) {
10551        template = template.innerHTML;
10552      } else {
10553        {
10554          warn('invalid template option:' + template, this);
10555        }
10556        return this
10557      }
10558    } else if (el) {
10559      template = getOuterHTML(el);
10560    }
10561    if (template) {
10562      /* istanbul ignore if */
10563      if ("development" !== 'production' && config.performance && mark) {
10564        mark('compile');
10565      }
10566
10567      var ref = compileToFunctions(template, {
10568        shouldDecodeNewlines: shouldDecodeNewlines,
10569        shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
10570        delimiters: options.delimiters,
10571        comments: options.comments
10572      }, this);
10573      var render = ref.render;
10574      var staticRenderFns = ref.staticRenderFns;
10575      options.render = render;
10576      options.staticRenderFns = staticRenderFns;
10577
10578      /* istanbul ignore if */
10579      if ("development" !== 'production' && config.performance && mark) {
10580        mark('compile end');
10581        measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
10582      }
10583    }
10584  }
10585  return mount.call(this, el, hydrating)
10586};
10587
10588/**
10589 * Get outerHTML of elements, taking care
10590 * of SVG elements in IE as well.
10591 */
10592function getOuterHTML (el) {
10593  if (el.outerHTML) {
10594    return el.outerHTML
10595  } else {
10596    var container = document.createElement('div');
10597    container.appendChild(el.cloneNode(true));
10598    return container.innerHTML
10599  }
10600}
10601
10602Vue$3.compile = compileToFunctions;
10603
10604return Vue$3;
10605
10606})));