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Dosya Düzenle: vue.js

/*!
 * Vue.js v2.2.4
 * (c) 2014-2017 Evan You
 * Released under the MIT License.
 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.Vue = factory());
}(this, (function () { 'use strict';

/*  */

/**
 * Convert a value to a string that is actually rendered.
 */
function _toString (val) {
  return val == null
    ? ''
    : typeof val === 'object'
      ? JSON.stringify(val, null, 2)
      : String(val)
}

/**
 * Convert a input value to a number for persistence.
 * If the conversion fails, return original string.
 */
function toNumber (val) {
  var n = parseFloat(val);
  return isNaN(n) ? val : n
}

/**
 * Make a map and return a function for checking if a key
 * is in that map.
 */
function makeMap (
  str,
  expectsLowerCase
) {
  var map = Object.create(null);
  var list = str.split(',');
  for (var i = 0; i < list.length; i++) {
    map[list[i]] = true;
  }
  return expectsLowerCase
    ? function (val) { return map[val.toLowerCase()]; }
    : function (val) { return map[val]; }
}

/**
 * Check if a tag is a built-in tag.
 */
var isBuiltInTag = makeMap('slot,component', true);

/**
 * Remove an item from an array
 */
function remove (arr, item) {
  if (arr.length) {
    var index = arr.indexOf(item);
    if (index > -1) {
      return arr.splice(index, 1)
    }
  }
}

/**
 * Check whether the object has the property.
 */
var hasOwnProperty = Object.prototype.hasOwnProperty;
function hasOwn (obj, key) {
  return hasOwnProperty.call(obj, key)
}

/**
 * Check if value is primitive
 */
function isPrimitive (value) {
  return typeof value === 'string' || typeof value === 'number'
}

/**
 * Create a cached version of a pure function.
 */
function cached (fn) {
  var cache = Object.create(null);
  return (function cachedFn (str) {
    var hit = cache[str];
    return hit || (cache[str] = fn(str))
  })
}

/**
 * Camelize a hyphen-delimited string.
 */
var camelizeRE = /-(\w)/g;
var camelize = cached(function (str) {
  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
});

/**
 * Capitalize a string.
 */
var capitalize = cached(function (str) {
  return str.charAt(0).toUpperCase() + str.slice(1)
});

/**
 * Hyphenate a camelCase string.
 */
var hyphenateRE = /([^-])([A-Z])/g;
var hyphenate = cached(function (str) {
  return str
    .replace(hyphenateRE, '$1-$2')
    .replace(hyphenateRE, '$1-$2')
    .toLowerCase()
});

/**
 * Simple bind, faster than native
 */
function bind (fn, ctx) {
  function boundFn (a) {
    var l = arguments.length;
    return l
      ? l > 1
        ? fn.apply(ctx, arguments)
        : fn.call(ctx, a)
      : fn.call(ctx)
  }
  // record original fn length
  boundFn._length = fn.length;
  return boundFn
}

/**
 * Convert an Array-like object to a real Array.
 */
function toArray (list, start) {
  start = start || 0;
  var i = list.length - start;
  var ret = new Array(i);
  while (i--) {
    ret[i] = list[i + start];
  }
  return ret
}

/**
 * Mix properties into target object.
 */
function extend (to, _from) {
  for (var key in _from) {
    to[key] = _from[key];
  }
  return to
}

/**
 * Quick object check - this is primarily used to tell
 * Objects from primitive values when we know the value
 * is a JSON-compliant type.
 */
function isObject (obj) {
  return obj !== null && typeof obj === 'object'
}

/**
 * Strict object type check. Only returns true
 * for plain JavaScript objects.
 */
var toString = Object.prototype.toString;
var OBJECT_STRING = '[object Object]';
function isPlainObject (obj) {
  return toString.call(obj) === OBJECT_STRING
}

/**
 * Merge an Array of Objects into a single Object.
 */
function toObject (arr) {
  var res = {};
  for (var i = 0; i < arr.length; i++) {
    if (arr[i]) {
      extend(res, arr[i]);
    }
  }
  return res
}

/**
 * Perform no operation.
 */
function noop () {}

/**
 * Always return false.
 */
var no = function () { return false; };

/**
 * Return same value
 */
var identity = function (_) { return _; };

/**
 * Generate a static keys string from compiler modules.
 */
function genStaticKeys (modules) {
  return modules.reduce(function (keys, m) {
    return keys.concat(m.staticKeys || [])
  }, []).join(',')
}

/**
 * Check if two values are loosely equal - that is,
 * if they are plain objects, do they have the same shape?
 */
function looseEqual (a, b) {
  var isObjectA = isObject(a);
  var isObjectB = isObject(b);
  if (isObjectA && isObjectB) {
    try {
      return JSON.stringify(a) === JSON.stringify(b)
    } catch (e) {
      // possible circular reference
      return a === b
    }
  } else if (!isObjectA && !isObjectB) {
    return String(a) === String(b)
  } else {
    return false
  }
}

function looseIndexOf (arr, val) {
  for (var i = 0; i < arr.length; i++) {
    if (looseEqual(arr[i], val)) { return i }
  }
  return -1
}

/**
 * Ensure a function is called only once.
 */
function once (fn) {
  var called = false;
  return function () {
    if (!called) {
      called = true;
      fn();
    }
  }
}

/*  */

var config = {
  /**
   * Option merge strategies (used in core/util/options)
   */
  optionMergeStrategies: Object.create(null),

/**
   * Whether to suppress warnings.
   */
  silent: false,

/**
   * Show production mode tip message on boot?
   */
  productionTip: "development" !== 'production',

/**
   * Whether to enable devtools
   */
  devtools: "development" !== 'production',

/**
   * Whether to record perf
   */
  performance: false,

/**
   * Error handler for watcher errors
   */
  errorHandler: null,

/**
   * Ignore certain custom elements
   */
  ignoredElements: [],

/**
   * Custom user key aliases for v-on
   */
  keyCodes: Object.create(null),

/**
   * Check if a tag is reserved so that it cannot be registered as a
   * component. This is platform-dependent and may be overwritten.
   */
  isReservedTag: no,

/**
   * Check if a tag is an unknown element.
   * Platform-dependent.
   */
  isUnknownElement: no,

/**
   * Get the namespace of an element
   */
  getTagNamespace: noop,

/**
   * Parse the real tag name for the specific platform.
   */
  parsePlatformTagName: identity,

/**
   * Check if an attribute must be bound using property, e.g. value
   * Platform-dependent.
   */
  mustUseProp: no,

/**
   * List of asset types that a component can own.
   */
  _assetTypes: [
    'component',
    'directive',
    'filter'
  ],

/**
   * List of lifecycle hooks.
   */
  _lifecycleHooks: [
    'beforeCreate',
    'created',
    'beforeMount',
    'mounted',
    'beforeUpdate',
    'updated',
    'beforeDestroy',
    'destroyed',
    'activated',
    'deactivated'
  ],

/**
   * Max circular updates allowed in a scheduler flush cycle.
   */
  _maxUpdateCount: 100
};

/*  */

var emptyObject = Object.freeze({});

/**
 * Check if a string starts with $ or _
 */
function isReserved (str) {
  var c = (str + '').charCodeAt(0);
  return c === 0x24 || c === 0x5F
}

/**
 * Define a property.
 */
function def (obj, key, val, enumerable) {
  Object.defineProperty(obj, key, {
    value: val,
    enumerable: !!enumerable,
    writable: true,
    configurable: true
  });
}

/**
 * Parse simple path.
 */
var bailRE = /[^\w.$]/;
function parsePath (path) {
  if (bailRE.test(path)) {
    return
  }
  var segments = path.split('.');
  return function (obj) {
    for (var i = 0; i < segments.length; i++) {
      if (!obj) { return }
      obj = obj[segments[i]];
    }
    return obj
  }
}

/*  */
/* globals MutationObserver */

// can we use __proto__?
var hasProto = '__proto__' in {};

// Browser environment sniffing
var inBrowser = typeof window !== 'undefined';
var UA = inBrowser && window.navigator.userAgent.toLowerCase();
var isIE = UA && /msie|trident/.test(UA);
var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
var isEdge = UA && UA.indexOf('edge/') > 0;
var isAndroid = UA && UA.indexOf('android') > 0;
var isIOS = UA && /iphone|ipad|ipod|ios/.test(UA);
var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;

// this needs to be lazy-evaled because vue may be required before
// vue-server-renderer can set VUE_ENV
var _isServer;
var isServerRendering = function () {
  if (_isServer === undefined) {
    /* istanbul ignore if */
    if (!inBrowser && typeof global !== 'undefined') {
      // detect presence of vue-server-renderer and avoid
      // Webpack shimming the process
      _isServer = global['process'].env.VUE_ENV === 'server';
    } else {
      _isServer = false;
    }
  }
  return _isServer
};

// detect devtools
var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;

/* istanbul ignore next */
function isNative (Ctor) {
  return /native code/.test(Ctor.toString())
}

var hasSymbol =
  typeof Symbol !== 'undefined' && isNative(Symbol) &&
  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);

/**
 * Defer a task to execute it asynchronously.
 */
var nextTick = (function () {
  var callbacks = [];
  var pending = false;
  var timerFunc;

function nextTickHandler () {
    pending = false;
    var copies = callbacks.slice(0);
    callbacks.length = 0;
    for (var i = 0; i < copies.length; i++) {
      copies[i]();
    }
  }

// the nextTick behavior leverages the microtask queue, which can be accessed
  // via either native Promise.then or MutationObserver.
  // MutationObserver has wider support, however it is seriously bugged in
  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
  // completely stops working after triggering a few times... so, if native
  // Promise is available, we will use it:
  /* istanbul ignore if */
  if (typeof Promise !== 'undefined' && isNative(Promise)) {
    var p = Promise.resolve();
    var logError = function (err) { console.error(err); };
    timerFunc = function () {
      p.then(nextTickHandler).catch(logError);
      // in problematic UIWebViews, Promise.then doesn't completely break, but
      // it can get stuck in a weird state where callbacks are pushed into the
      // microtask queue but the queue isn't being flushed, until the browser
      // needs to do some other work, e.g. handle a timer. Therefore we can
      // "force" the microtask queue to be flushed by adding an empty timer.
      if (isIOS) { setTimeout(noop); }
    };
  } else if (typeof MutationObserver !== 'undefined' && (
    isNative(MutationObserver) ||
    // PhantomJS and iOS 7.x
    MutationObserver.toString() === '[object MutationObserverConstructor]'
  )) {
    // use MutationObserver where native Promise is not available,
    // e.g. PhantomJS IE11, iOS7, Android 4.4
    var counter = 1;
    var observer = new MutationObserver(nextTickHandler);
    var textNode = document.createTextNode(String(counter));
    observer.observe(textNode, {
      characterData: true
    });
    timerFunc = function () {
      counter = (counter + 1) % 2;
      textNode.data = String(counter);
    };
  } else {
    // fallback to setTimeout
    /* istanbul ignore next */
    timerFunc = function () {
      setTimeout(nextTickHandler, 0);
    };
  }

return function queueNextTick (cb, ctx) {
    var _resolve;
    callbacks.push(function () {
      if (cb) { cb.call(ctx); }
      if (_resolve) { _resolve(ctx); }
    });
    if (!pending) {
      pending = true;
      timerFunc();
    }
    if (!cb && typeof Promise !== 'undefined') {
      return new Promise(function (resolve) {
        _resolve = resolve;
      })
    }
  }
})();

var _Set;
/* istanbul ignore if */
if (typeof Set !== 'undefined' && isNative(Set)) {
  // use native Set when available.
  _Set = Set;
} else {
  // a non-standard Set polyfill that only works with primitive keys.
  _Set = (function () {
    function Set () {
      this.set = Object.create(null);
    }
    Set.prototype.has = function has (key) {
      return this.set[key] === true
    };
    Set.prototype.add = function add (key) {
      this.set[key] = true;
    };
    Set.prototype.clear = function clear () {
      this.set = Object.create(null);
    };

return Set;
  }());
}

var warn = noop;
var tip = noop;
var formatComponentName;

{
  var hasConsole = typeof console !== 'undefined';
  var classifyRE = /(?:^|[-_])(\w)/g;
  var classify = function (str) { return str
    .replace(classifyRE, function (c) { return c.toUpperCase(); })
    .replace(/[-_]/g, ''); };

warn = function (msg, vm) {
    if (hasConsole && (!config.silent)) {
      console.error("[Vue warn]: " + msg + " " + (
        vm ? formatLocation(formatComponentName(vm)) : ''
      ));
    }
  };

tip = function (msg, vm) {
    if (hasConsole && (!config.silent)) {
      console.warn("[Vue tip]: " + msg + " " + (
        vm ? formatLocation(formatComponentName(vm)) : ''
      ));
    }
  };

formatComponentName = function (vm, includeFile) {
    if (vm.$root === vm) {
      return '<Root>'
    }
    var name = typeof vm === 'function' && vm.options
      ? vm.options.name
      : vm._isVue
        ? vm.$options.name || vm.$options._componentTag
        : vm.name;

var file = vm._isVue && vm.$options.__file;
    if (!name && file) {
      var match = file.match(/([^/\\]+)\.vue$/);
      name = match && match[1];
    }

return (
      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
      (file && includeFile !== false ? (" at " + file) : '')
    )
  };

var formatLocation = function (str) {
    if (str === "<Anonymous>") {
      str += " - use the \"name\" option for better debugging messages.";
    }
    return ("\n(found in " + str + ")")
  };
}

/*  */

var uid$1 = 0;

/**
 * A dep is an observable that can have multiple
 * directives subscribing to it.
 */
var Dep = function Dep () {
  this.id = uid$1++;
  this.subs = [];
};

Dep.prototype.addSub = function addSub (sub) {
  this.subs.push(sub);
};

Dep.prototype.removeSub = function removeSub (sub) {
  remove(this.subs, sub);
};

Dep.prototype.depend = function depend () {
  if (Dep.target) {
    Dep.target.addDep(this);
  }
};

Dep.prototype.notify = function notify () {
  // stabilize the subscriber list first
  var subs = this.subs.slice();
  for (var i = 0, l = subs.length; i < l; i++) {
    subs[i].update();
  }
};

// the current target watcher being evaluated.
// this is globally unique because there could be only one
// watcher being evaluated at any time.
Dep.target = null;
var targetStack = [];

function pushTarget (_target) {
  if (Dep.target) { targetStack.push(Dep.target); }
  Dep.target = _target;
}

function popTarget () {
  Dep.target = targetStack.pop();
}

/*
 * not type checking this file because flow doesn't play well with
 * dynamically accessing methods on Array prototype
 */

var arrayProto = Array.prototype;
var arrayMethods = Object.create(arrayProto);[
  'push',
  'pop',
  'shift',
  'unshift',
  'splice',
  'sort',
  'reverse'
]
.forEach(function (method) {
  // cache original method
  var original = arrayProto[method];
  def(arrayMethods, method, function mutator () {
    var arguments$1 = arguments;

// avoid leaking arguments:
    // http://jsperf.com/closure-with-arguments
    var i = arguments.length;
    var args = new Array(i);
    while (i--) {
      args[i] = arguments$1[i];
    }
    var result = original.apply(this, args);
    var ob = this.__ob__;
    var inserted;
    switch (method) {
      case 'push':
        inserted = args;
        break
      case 'unshift':
        inserted = args;
        break
      case 'splice':
        inserted = args.slice(2);
        break
    }
    if (inserted) { ob.observeArray(inserted); }
    // notify change
    ob.dep.notify();
    return result
  });
});

/*  */

var arrayKeys = Object.getOwnPropertyNames(arrayMethods);

/**
 * By default, when a reactive property is set, the new value is
 * also converted to become reactive. However when passing down props,
 * we don't want to force conversion because the value may be a nested value
 * under a frozen data structure. Converting it would defeat the optimization.
 */
var observerState = {
  shouldConvert: true,
  isSettingProps: false
};

/**
 * Observer class that are attached to each observed
 * object. Once attached, the observer converts target
 * object's property keys into getter/setters that
 * collect dependencies and dispatches updates.
 */
var Observer = function Observer (value) {
  this.value = value;
  this.dep = new Dep();
  this.vmCount = 0;
  def(value, '__ob__', this);
  if (Array.isArray(value)) {
    var augment = hasProto
      ? protoAugment
      : copyAugment;
    augment(value, arrayMethods, arrayKeys);
    this.observeArray(value);
  } else {
    this.walk(value);
  }
};

/**
 * Walk through each property and convert them into
 * getter/setters. This method should only be called when
 * value type is Object.
 */
Observer.prototype.walk = function walk (obj) {
  var keys = Object.keys(obj);
  for (var i = 0; i < keys.length; i++) {
    defineReactive$$1(obj, keys[i], obj[keys[i]]);
  }
};

/**
 * Observe a list of Array items.
 */
Observer.prototype.observeArray = function observeArray (items) {
  for (var i = 0, l = items.length; i < l; i++) {
    observe(items[i]);
  }
};

// helpers

/**
 * Augment an target Object or Array by intercepting
 * the prototype chain using __proto__
 */
function protoAugment (target, src) {
  /* eslint-disable no-proto */
  target.__proto__ = src;
  /* eslint-enable no-proto */
}

/**
 * Augment an target Object or Array by defining
 * hidden properties.
 */
/* istanbul ignore next */
function copyAugment (target, src, keys) {
  for (var i = 0, l = keys.length; i < l; i++) {
    var key = keys[i];
    def(target, key, src[key]);
  }
}

/**
 * Attempt to create an observer instance for a value,
 * returns the new observer if successfully observed,
 * or the existing observer if the value already has one.
 */
function observe (value, asRootData) {
  if (!isObject(value)) {
    return
  }
  var ob;
  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
    ob = value.__ob__;
  } else if (
    observerState.shouldConvert &&
    !isServerRendering() &&
    (Array.isArray(value) || isPlainObject(value)) &&
    Object.isExtensible(value) &&
    !value._isVue
  ) {
    ob = new Observer(value);
  }
  if (asRootData && ob) {
    ob.vmCount++;
  }
  return ob
}

/**
 * Define a reactive property on an Object.
 */
function defineReactive$$1 (
  obj,
  key,
  val,
  customSetter
) {
  var dep = new Dep();

var property = Object.getOwnPropertyDescriptor(obj, key);
  if (property && property.configurable === false) {
    return
  }

// cater for pre-defined getter/setters
  var getter = property && property.get;
  var setter = property && property.set;

/**
 * Set a property on an object. Adds the new property and
 * triggers change notification if the property doesn't
 * already exist.
 */
function set (target, key, val) {
  if (Array.isArray(target)) {
    target.length = Math.max(target.length, key);
    target.splice(key, 1, val);
    return val
  }
  if (hasOwn(target, key)) {
    target[key] = val;
    return val
  }
  var ob = target.__ob__;
  if (target._isVue || (ob && ob.vmCount)) {
    "development" !== 'production' && warn(
      'Avoid adding reactive properties to a Vue instance or its root $data ' +
      'at runtime - declare it upfront in the data option.'
    );
    return val
  }
  if (!ob) {
    target[key] = val;
    return val
  }
  defineReactive$$1(ob.value, key, val);
  ob.dep.notify();
  return val
}

/**
 * Delete a property and trigger change if necessary.
 */
function del (target, key) {
  if (Array.isArray(target)) {
    target.splice(key, 1);
    return
  }
  var ob = target.__ob__;
  if (target._isVue || (ob && ob.vmCount)) {
    "development" !== 'production' && warn(
      'Avoid deleting properties on a Vue instance or its root $data ' +
      '- just set it to null.'
    );
    return
  }
  if (!hasOwn(target, key)) {
    return
  }
  delete target[key];
  if (!ob) {
    return
  }
  ob.dep.notify();
}

/**
 * Collect dependencies on array elements when the array is touched, since
 * we cannot intercept array element access like property getters.
 */
function dependArray (value) {
  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
    e = value[i];
    e && e.__ob__ && e.__ob__.dep.depend();
    if (Array.isArray(e)) {
      dependArray(e);
    }
  }
}

/*  */

/**
 * Option overwriting strategies are functions that handle
 * how to merge a parent option value and a child option
 * value into the final value.
 */
var strats = config.optionMergeStrategies;

/**
 * Options with restrictions
 */
{
  strats.el = strats.propsData = function (parent, child, vm, key) {
    if (!vm) {
      warn(
        "option \"" + key + "\" can only be used during instance " +
        'creation with the `new` keyword.'
      );
    }
    return defaultStrat(parent, child)
  };
}

/**
 * Helper that recursively merges two data objects together.
 */
function mergeData (to, from) {
  if (!from) { return to }
  var key, toVal, fromVal;
  var keys = Object.keys(from);
  for (var i = 0; i < keys.length; i++) {
    key = keys[i];
    toVal = to[key];
    fromVal = from[key];
    if (!hasOwn(to, key)) {
      set(to, key, fromVal);
    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
      mergeData(toVal, fromVal);
    }
  }
  return to
}

/**
 * Data
 */
strats.data = function (
  parentVal,
  childVal,
  vm
) {
  if (!vm) {
    // in a Vue.extend merge, both should be functions
    if (!childVal) {
      return parentVal
    }
    if (typeof childVal !== 'function') {
      "development" !== 'production' && warn(
        'The "data" option should be a function ' +
        'that returns a per-instance value in component ' +
        'definitions.',
        vm
      );
      return parentVal
    }
    if (!parentVal) {
      return childVal
    }
    // when parentVal & childVal are both present,
    // we need to return a function that returns the
    // merged result of both functions... no need to
    // check if parentVal is a function here because
    // it has to be a function to pass previous merges.
    return function mergedDataFn () {
      return mergeData(
        childVal.call(this),
        parentVal.call(this)
      )
    }
  } else if (parentVal || childVal) {
    return function mergedInstanceDataFn () {
      // instance merge
      var instanceData = typeof childVal === 'function'
        ? childVal.call(vm)
        : childVal;
      var defaultData = typeof parentVal === 'function'
        ? parentVal.call(vm)
        : undefined;
      if (instanceData) {
        return mergeData(instanceData, defaultData)
      } else {
        return defaultData
      }
    }
  }
};

/**
 * Hooks and props are merged as arrays.
 */
function mergeHook (
  parentVal,
  childVal
) {
  return childVal
    ? parentVal
      ? parentVal.concat(childVal)
      : Array.isArray(childVal)
        ? childVal
        : [childVal]
    : parentVal
}

config._lifecycleHooks.forEach(function (hook) {
  strats[hook] = mergeHook;
});

/**
 * Assets
 *
 * When a vm is present (instance creation), we need to do
 * a three-way merge between constructor options, instance
 * options and parent options.
 */
function mergeAssets (parentVal, childVal) {
  var res = Object.create(parentVal || null);
  return childVal
    ? extend(res, childVal)
    : res
}

config._assetTypes.forEach(function (type) {
  strats[type + 's'] = mergeAssets;
});

/**
 * Watchers.
 *
 * Watchers hashes should not overwrite one
 * another, so we merge them as arrays.
 */
strats.watch = function (parentVal, childVal) {
  /* istanbul ignore if */
  if (!childVal) { return Object.create(parentVal || null) }
  if (!parentVal) { return childVal }
  var ret = {};
  extend(ret, parentVal);
  for (var key in childVal) {
    var parent = ret[key];
    var child = childVal[key];
    if (parent && !Array.isArray(parent)) {
      parent = [parent];
    }
    ret[key] = parent
      ? parent.concat(child)
      : [child];
  }
  return ret
};

/**
 * Other object hashes.
 */
strats.props =
strats.methods =
strats.computed = function (parentVal, childVal) {
  if (!childVal) { return Object.create(parentVal || null) }
  if (!parentVal) { return childVal }
  var ret = Object.create(null);
  extend(ret, parentVal);
  extend(ret, childVal);
  return ret
};

/**
 * Default strategy.
 */
var defaultStrat = function (parentVal, childVal) {
  return childVal === undefined
    ? parentVal
    : childVal
};

/**
 * Validate component names
 */
function checkComponents (options) {
  for (var key in options.components) {
    var lower = key.toLowerCase();
    if (isBuiltInTag(lower) || config.isReservedTag(lower)) {
      warn(
        'Do not use built-in or reserved HTML elements as component ' +
        'id: ' + key
      );
    }
  }
}

/**
 * Ensure all props option syntax are normalized into the
 * Object-based format.
 */
function normalizeProps (options) {
  var props = options.props;
  if (!props) { return }
  var res = {};
  var i, val, name;
  if (Array.isArray(props)) {
    i = props.length;
    while (i--) {
      val = props[i];
      if (typeof val === 'string') {
        name = camelize(val);
        res[name] = { type: null };
      } else {
        warn('props must be strings when using array syntax.');
      }
    }
  } else if (isPlainObject(props)) {
    for (var key in props) {
      val = props[key];
      name = camelize(key);
      res[name] = isPlainObject(val)
        ? val
        : { type: val };
    }
  }
  options.props = res;
}

/**
 * Normalize raw function directives into object format.
 */
function normalizeDirectives (options) {
  var dirs = options.directives;
  if (dirs) {
    for (var key in dirs) {
      var def = dirs[key];
      if (typeof def === 'function') {
        dirs[key] = { bind: def, update: def };
      }
    }
  }
}

/**
 * Merge two option objects into a new one.
 * Core utility used in both instantiation and inheritance.
 */
function mergeOptions (
  parent,
  child,
  vm
) {
  {
    checkComponents(child);
  }
  normalizeProps(child);
  normalizeDirectives(child);
  var extendsFrom = child.extends;
  if (extendsFrom) {
    parent = typeof extendsFrom === 'function'
      ? mergeOptions(parent, extendsFrom.options, vm)
      : mergeOptions(parent, extendsFrom, vm);
  }
  if (child.mixins) {
    for (var i = 0, l = child.mixins.length; i < l; i++) {
      var mixin = child.mixins[i];
      if (mixin.prototype instanceof Vue$3) {
        mixin = mixin.options;
      }
      parent = mergeOptions(parent, mixin, vm);
    }
  }
  var options = {};
  var key;
  for (key in parent) {
    mergeField(key);
  }
  for (key in child) {
    if (!hasOwn(parent, key)) {
      mergeField(key);
    }
  }
  function mergeField (key) {
    var strat = strats[key] || defaultStrat;
    options[key] = strat(parent[key], child[key], vm, key);
  }
  return options
}

/**
 * Resolve an asset.
 * This function is used because child instances need access
 * to assets defined in its ancestor chain.
 */
function resolveAsset (
  options,
  type,
  id,
  warnMissing
) {
  /* istanbul ignore if */
  if (typeof id !== 'string') {
    return
  }
  var assets = options[type];
  // check local registration variations first
  if (hasOwn(assets, id)) { return assets[id] }
  var camelizedId = camelize(id);
  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
  var PascalCaseId = capitalize(camelizedId);
  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
  // fallback to prototype chain
  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
  if ("development" !== 'production' && warnMissing && !res) {
    warn(
      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
      options
    );
  }
  return res
}

/*  */

/**
 * Get the default value of a prop.
 */
function getPropDefaultValue (vm, prop, key) {
  // no default, return undefined
  if (!hasOwn(prop, 'default')) {
    return undefined
  }
  var def = prop.default;
  // warn against non-factory defaults for Object & Array
  if ("development" !== 'production' && isObject(def)) {
    warn(
      'Invalid default value for prop "' + key + '": ' +
      'Props with type Object/Array must use a factory function ' +
      'to return the default value.',
      vm
    );
  }
  // the raw prop value was also undefined from previous render,
  // return previous default value to avoid unnecessary watcher trigger
  if (vm && vm.$options.propsData &&
    vm.$options.propsData[key] === undefined &&
    vm._props[key] !== undefined) {
    return vm._props[key]
  }
  // call factory function for non-Function types
  // a value is Function if its prototype is function even across different execution context
  return typeof def === 'function' && getType(prop.type) !== 'Function'
    ? def.call(vm)
    : def
}

/**
 * Assert whether a prop is valid.
 */
function assertProp (
  prop,
  name,
  value,
  vm,
  absent
) {
  if (prop.required && absent) {
    warn(
      'Missing required prop: "' + name + '"',
      vm
    );
    return
  }
  if (value == null && !prop.required) {
    return
  }
  var type = prop.type;
  var valid = !type || type === true;
  var expectedTypes = [];
  if (type) {
    if (!Array.isArray(type)) {
      type = [type];
    }
    for (var i = 0; i < type.length && !valid; i++) {
      var assertedType = assertType(value, type[i]);
      expectedTypes.push(assertedType.expectedType || '');
      valid = assertedType.valid;
    }
  }
  if (!valid) {
    warn(
      'Invalid prop: type check failed for prop "' + name + '".' +
      ' Expected ' + expectedTypes.map(capitalize).join(', ') +
      ', got ' + Object.prototype.toString.call(value).slice(8, -1) + '.',
      vm
    );
    return
  }
  var validator = prop.validator;
  if (validator) {
    if (!validator(value)) {
      warn(
        'Invalid prop: custom validator check failed for prop "' + name + '".',
        vm
      );
    }
  }
}

/**
 * Assert the type of a value
 */
function assertType (value, type) {
  var valid;
  var expectedType = getType(type);
  if (expectedType === 'String') {
    valid = typeof value === (expectedType = 'string');
  } else if (expectedType === 'Number') {
    valid = typeof value === (expectedType = 'number');
  } else if (expectedType === 'Boolean') {
    valid = typeof value === (expectedType = 'boolean');
  } else if (expectedType === 'Function') {
    valid = typeof value === (expectedType = 'function');
  } else if (expectedType === 'Object') {
    valid = isPlainObject(value);
  } else if (expectedType === 'Array') {
    valid = Array.isArray(value);
  } else {
    valid = value instanceof type;
  }
  return {
    valid: valid,
    expectedType: expectedType
  }
}

/**
 * Use function string name to check built-in types,
 * because a simple equality check will fail when running
 * across different vms / iframes.
 */
function getType (fn) {
  var match = fn && fn.toString().match(/^\s*function (\w+)/);
  return match && match[1]
}

function isType (type, fn) {
  if (!Array.isArray(fn)) {
    return getType(fn) === getType(type)
  }
  for (var i = 0, len = fn.length; i < len; i++) {
    if (getType(fn[i]) === getType(type)) {
      return true
    }
  }
  /* istanbul ignore next */
  return false
}

/* not type checking this file because flow doesn't play well with Proxy */

var initProxy;

{
  var allowedGlobals = makeMap(
    'Infinity,undefined,NaN,isFinite,isNaN,' +
    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
    'require' // for Webpack/Browserify
  );

var warnNonPresent = function (target, key) {
    warn(
      "Property or method \"" + key + "\" is not defined on the instance but " +
      "referenced during render. Make sure to declare reactive data " +
      "properties in the data option.",
      target
    );
  };

var hasProxy =
    typeof Proxy !== 'undefined' &&
    Proxy.toString().match(/native code/);

if (hasProxy) {
    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta');
    config.keyCodes = new Proxy(config.keyCodes, {
      set: function set (target, key, value) {
        if (isBuiltInModifier(key)) {
          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
          return false
        } else {
          target[key] = value;
          return true
        }
      }
    });
  }

var getHandler = {
    get: function get (target, key) {
      if (typeof key === 'string' && !(key in target)) {
        warnNonPresent(target, key);
      }
      return target[key]
    }
  };

initProxy = function initProxy (vm) {
    if (hasProxy) {
      // determine which proxy handler to use
      var options = vm.$options;
      var handlers = options.render && options.render._withStripped
        ? getHandler
        : hasHandler;
      vm._renderProxy = new Proxy(vm, handlers);
    } else {
      vm._renderProxy = vm;
    }
  };
}

var mark;
var measure;

{
  var perf = inBrowser && window.performance;
  /* istanbul ignore if */
  if (
    perf &&
    perf.mark &&
    perf.measure &&
    perf.clearMarks &&
    perf.clearMeasures
  ) {
    mark = function (tag) { return perf.mark(tag); };
    measure = function (name, startTag, endTag) {
      perf.measure(name, startTag, endTag);
      perf.clearMarks(startTag);
      perf.clearMarks(endTag);
      perf.clearMeasures(name);
    };
  }
}

/*  */

var VNode = function VNode (
  tag,
  data,
  children,
  text,
  elm,
  context,
  componentOptions
) {
  this.tag = tag;
  this.data = data;
  this.children = children;
  this.text = text;
  this.elm = elm;
  this.ns = undefined;
  this.context = context;
  this.functionalContext = undefined;
  this.key = data && data.key;
  this.componentOptions = componentOptions;
  this.componentInstance = undefined;
  this.parent = undefined;
  this.raw = false;
  this.isStatic = false;
  this.isRootInsert = true;
  this.isComment = false;
  this.isCloned = false;
  this.isOnce = false;
};

var prototypeAccessors = { child: {} };

// DEPRECATED: alias for componentInstance for backwards compat.
/* istanbul ignore next */
prototypeAccessors.child.get = function () {
  return this.componentInstance
};

Object.defineProperties( VNode.prototype, prototypeAccessors );

var createEmptyVNode = function () {
  var node = new VNode();
  node.text = '';
  node.isComment = true;
  return node
};

function createTextVNode (val) {
  return new VNode(undefined, undefined, undefined, String(val))
}

// optimized shallow clone
// used for static nodes and slot nodes because they may be reused across
// multiple renders, cloning them avoids errors when DOM manipulations rely
// on their elm reference.
function cloneVNode (vnode) {
  var cloned = new VNode(
    vnode.tag,
    vnode.data,
    vnode.children,
    vnode.text,
    vnode.elm,
    vnode.context,
    vnode.componentOptions
  );
  cloned.ns = vnode.ns;
  cloned.isStatic = vnode.isStatic;
  cloned.key = vnode.key;
  cloned.isCloned = true;
  return cloned
}

function cloneVNodes (vnodes) {
  var len = vnodes.length;
  var res = new Array(len);
  for (var i = 0; i < len; i++) {
    res[i] = cloneVNode(vnodes[i]);
  }
  return res
}

/*  */

var normalizeEvent = cached(function (name) {
  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
  name = once$$1 ? name.slice(1) : name;
  var capture = name.charAt(0) === '!';
  name = capture ? name.slice(1) : name;
  return {
    name: name,
    once: once$$1,
    capture: capture
  }
});

function createFnInvoker (fns) {
  function invoker () {
    var arguments$1 = arguments;

/*  */

function mergeVNodeHook (def, hookKey, hook) {
  var invoker;
  var oldHook = def[hookKey];

function wrappedHook () {
    hook.apply(this, arguments);
    // important: remove merged hook to ensure it's called only once
    // and prevent memory leak
    remove(invoker.fns, wrappedHook);
  }

if (!oldHook) {
    // no existing hook
    invoker = createFnInvoker([wrappedHook]);
  } else {
    /* istanbul ignore if */
    if (oldHook.fns && oldHook.merged) {
      // already a merged invoker
      invoker = oldHook;
      invoker.fns.push(wrappedHook);
    } else {
      // existing plain hook
      invoker = createFnInvoker([oldHook, wrappedHook]);
    }
  }

invoker.merged = true;
  def[hookKey] = invoker;
}

/*  */

// The template compiler attempts to minimize the need for normalization by
// statically analyzing the template at compile time.
//
// For plain HTML markup, normalization can be completely skipped because the
// generated render function is guaranteed to return Array<VNode>. There are
// two cases where extra normalization is needed:

// 1. When the children contains components - because a functional component
// may return an Array instead of a single root. In this case, just a simple
// normalization is needed - if any child is an Array, we flatten the whole
// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
// because functional components already normalize their own children.
function simpleNormalizeChildren (children) {
  for (var i = 0; i < children.length; i++) {
    if (Array.isArray(children[i])) {
      return Array.prototype.concat.apply([], children)
    }
  }
  return children
}

// 2. When the children contains constructs that always generated nested Arrays,
// e.g. <template>, <slot>, v-for, or when the children is provided by user
// with hand-written render functions / JSX. In such cases a full normalization
// is needed to cater to all possible types of children values.
function normalizeChildren (children) {
  return isPrimitive(children)
    ? [createTextVNode(children)]
    : Array.isArray(children)
      ? normalizeArrayChildren(children)
      : undefined
}

/*  */

function getFirstComponentChild (children) {
  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
}

/*  */

function initEvents (vm) {
  vm._events = Object.create(null);
  vm._hasHookEvent = false;
  // init parent attached events
  var listeners = vm.$options._parentListeners;
  if (listeners) {
    updateComponentListeners(vm, listeners);
  }
}

var target;

function add (event, fn, once$$1) {
  if (once$$1) {
    target.$once(event, fn);
  } else {
    target.$on(event, fn);
  }
}

function remove$1 (event, fn) {
  target.$off(event, fn);
}

function updateComponentListeners (
  vm,
  listeners,
  oldListeners
) {
  target = vm;
  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
}

function eventsMixin (Vue) {
  var hookRE = /^hook:/;
  Vue.prototype.$on = function (event, fn) {
    var this$1 = this;

Vue.prototype.$once = function (event, fn) {
    var vm = this;
    function on () {
      vm.$off(event, on);
      fn.apply(vm, arguments);
    }
    on.fn = fn;
    vm.$on(event, on);
    return vm
  };

Vue.prototype.$off = function (event, fn) {
    var this$1 = this;

Vue.prototype.$emit = function (event) {
    var vm = this;
    var cbs = vm._events[event];
    if (cbs) {
      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
      var args = toArray(arguments, 1);
      for (var i = 0, l = cbs.length; i < l; i++) {
        cbs[i].apply(vm, args);
      }
    }
    return vm
  };
}

/*  */

/**
 * Runtime helper for resolving raw children VNodes into a slot object.
 */
function resolveSlots (
  children,
  context
) {
  var slots = {};
  if (!children) {
    return slots
  }
  var defaultSlot = [];
  var name, child;
  for (var i = 0, l = children.length; i < l; i++) {
    child = children[i];
    // named slots should only be respected if the vnode was rendered in the
    // same context.
    if ((child.context === context || child.functionalContext === context) &&
        child.data && (name = child.data.slot)) {
      var slot = (slots[name] || (slots[name] = []));
      if (child.tag === 'template') {
        slot.push.apply(slot, child.children);
      } else {
        slot.push(child);
      }
    } else {
      defaultSlot.push(child);
    }
  }
  // ignore whitespace
  if (!defaultSlot.every(isWhitespace)) {
    slots.default = defaultSlot;
  }
  return slots
}

function isWhitespace (node) {
  return node.isComment || node.text === ' '
}

function resolveScopedSlots (
  fns
) {
  var res = {};
  for (var i = 0; i < fns.length; i++) {
    res[fns[i][0]] = fns[i][1];
  }
  return res
}

/*  */

var activeInstance = null;

function initLifecycle (vm) {
  var options = vm.$options;

// locate first non-abstract parent
  var parent = options.parent;
  if (parent && !options.abstract) {
    while (parent.$options.abstract && parent.$parent) {
      parent = parent.$parent;
    }
    parent.$children.push(vm);
  }

vm.$parent = parent;
  vm.$root = parent ? parent.$root : vm;

vm.$children = [];
  vm.$refs = {};

vm._watcher = null;
  vm._inactive = null;
  vm._directInactive = false;
  vm._isMounted = false;
  vm._isDestroyed = false;
  vm._isBeingDestroyed = false;
}

Vue.prototype.$forceUpdate = function () {
    var vm = this;
    if (vm._watcher) {
      vm._watcher.update();
    }
  };

Vue.prototype.$destroy = function () {
    var vm = this;
    if (vm._isBeingDestroyed) {
      return
    }
    callHook(vm, 'beforeDestroy');
    vm._isBeingDestroyed = true;
    // remove self from parent
    var parent = vm.$parent;
    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
      remove(parent.$children, vm);
    }
    // teardown watchers
    if (vm._watcher) {
      vm._watcher.teardown();
    }
    var i = vm._watchers.length;
    while (i--) {
      vm._watchers[i].teardown();
    }
    // remove reference from data ob
    // frozen object may not have observer.
    if (vm._data.__ob__) {
      vm._data.__ob__.vmCount--;
    }
    // call the last hook...
    vm._isDestroyed = true;
    callHook(vm, 'destroyed');
    // turn off all instance listeners.
    vm.$off();
    // remove __vue__ reference
    if (vm.$el) {
      vm.$el.__vue__ = null;
    }
    // invoke destroy hooks on current rendered tree
    vm.__patch__(vm._vnode, null);
  };
}

var updateComponent;
  /* istanbul ignore if */
  if ("development" !== 'production' && config.performance && mark) {
    updateComponent = function () {
      var name = vm._name;
      var id = vm._uid;
      var startTag = "vue-perf-start:" + id;
      var endTag = "vue-perf-end:" + id;

mark(startTag);
      var vnode = vm._render();
      mark(endTag);
      measure((name + " render"), startTag, endTag);

mark(startTag);
      vm._update(vnode, hydrating);
      mark(endTag);
      measure((name + " patch"), startTag, endTag);
    };
  } else {
    updateComponent = function () {
      vm._update(vm._render(), hydrating);
    };
  }

vm._watcher = new Watcher(vm, updateComponent, noop);
  hydrating = false;

// manually mounted instance, call mounted on self
  // mounted is called for render-created child components in its inserted hook
  if (vm.$vnode == null) {
    vm._isMounted = true;
    callHook(vm, 'mounted');
  }
  return vm
}

function updateChildComponent (
  vm,
  propsData,
  listeners,
  parentVnode,
  renderChildren
) {
  // determine whether component has slot children
  // we need to do this before overwriting $options._renderChildren
  var hasChildren = !!(
    renderChildren ||               // has new static slots
    vm.$options._renderChildren ||  // has old static slots
    parentVnode.data.scopedSlots || // has new scoped slots
    vm.$scopedSlots !== emptyObject // has old scoped slots
  );

vm.$options._parentVnode = parentVnode;
  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
  if (vm._vnode) { // update child tree's parent
    vm._vnode.parent = parentVnode;
  }
  vm.$options._renderChildren = renderChildren;

// update props
  if (propsData && vm.$options.props) {
    observerState.shouldConvert = false;
    {
      observerState.isSettingProps = true;
    }
    var props = vm._props;
    var propKeys = vm.$options._propKeys || [];
    for (var i = 0; i < propKeys.length; i++) {
      var key = propKeys[i];
      props[key] = validateProp(key, vm.$options.props, propsData, vm);
    }
    observerState.shouldConvert = true;
    {
      observerState.isSettingProps = false;
    }
    // keep a copy of raw propsData
    vm.$options.propsData = propsData;
  }
  // update listeners
  if (listeners) {
    var oldListeners = vm.$options._parentListeners;
    vm.$options._parentListeners = listeners;
    updateComponentListeners(vm, listeners, oldListeners);
  }
  // resolve slots + force update if has children
  if (hasChildren) {
    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
    vm.$forceUpdate();
  }
}

function isInInactiveTree (vm) {
  while (vm && (vm = vm.$parent)) {
    if (vm._inactive) { return true }
  }
  return false
}

/*  */

var queue = [];
var has = {};
var circular = {};
var waiting = false;
var flushing = false;
var index = 0;

/**
 * Reset the scheduler's state.
 */
function resetSchedulerState () {
  queue.length = 0;
  has = {};
  {
    circular = {};
  }
  waiting = flushing = false;
}

/**
 * Flush both queues and run the watchers.
 */
function flushSchedulerQueue () {
  flushing = true;
  var watcher, id, vm;

// Sort queue before flush.
  // This ensures that:
  // 1. Components are updated from parent to child. (because parent is always
  //    created before the child)
  // 2. A component's user watchers are run before its render watcher (because
  //    user watchers are created before the render watcher)
  // 3. If a component is destroyed during a parent component's watcher run,
  //    its watchers can be skipped.
  queue.sort(function (a, b) { return a.id - b.id; });

// do not cache length because more watchers might be pushed
  // as we run existing watchers
  for (index = 0; index < queue.length; index++) {
    watcher = queue[index];
    id = watcher.id;
    has[id] = null;
    watcher.run();
    // in dev build, check and stop circular updates.
    if ("development" !== 'production' && has[id] != null) {
      circular[id] = (circular[id] || 0) + 1;
      if (circular[id] > config._maxUpdateCount) {
        warn(
          'You may have an infinite update loop ' + (
            watcher.user
              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
              : "in a component render function."
          ),
          watcher.vm
        );
        break
      }
    }
  }

// call updated hooks
  index = queue.length;
  while (index--) {
    watcher = queue[index];
    vm = watcher.vm;
    if (vm._watcher === watcher && vm._isMounted) {
      callHook(vm, 'updated');
    }
  }

// devtool hook
  /* istanbul ignore if */
  if (devtools && config.devtools) {
    devtools.emit('flush');
  }

resetSchedulerState();
}

/**
 * Push a watcher into the watcher queue.
 * Jobs with duplicate IDs will be skipped unless it's
 * pushed when the queue is being flushed.
 */
function queueWatcher (watcher) {
  var id = watcher.id;
  if (has[id] == null) {
    has[id] = true;
    if (!flushing) {
      queue.push(watcher);
    } else {
      // if already flushing, splice the watcher based on its id
      // if already past its id, it will be run next immediately.
      var i = queue.length - 1;
      while (i >= 0 && queue[i].id > watcher.id) {
        i--;
      }
      queue.splice(Math.max(i, index) + 1, 0, watcher);
    }
    // queue the flush
    if (!waiting) {
      waiting = true;
      nextTick(flushSchedulerQueue);
    }
  }
}

/*  */

var uid$2 = 0;

/**
 * A watcher parses an expression, collects dependencies,
 * and fires callback when the expression value changes.
 * This is used for both the $watch() api and directives.
 */
var Watcher = function Watcher (
  vm,
  expOrFn,
  cb,
  options
) {
  this.vm = vm;
  vm._watchers.push(this);
  // options
  if (options) {
    this.deep = !!options.deep;
    this.user = !!options.user;
    this.lazy = !!options.lazy;
    this.sync = !!options.sync;
  } else {
    this.deep = this.user = this.lazy = this.sync = false;
  }
  this.cb = cb;
  this.id = ++uid$2; // uid for batching
  this.active = true;
  this.dirty = this.lazy; // for lazy watchers
  this.deps = [];
  this.newDeps = [];
  this.depIds = new _Set();
  this.newDepIds = new _Set();
  this.expression = expOrFn.toString();
  // parse expression for getter
  if (typeof expOrFn === 'function') {
    this.getter = expOrFn;
  } else {
    this.getter = parsePath(expOrFn);
    if (!this.getter) {
      this.getter = function () {};
      "development" !== 'production' && warn(
        "Failed watching path: \"" + expOrFn + "\" " +
        'Watcher only accepts simple dot-delimited paths. ' +
        'For full control, use a function instead.',
        vm
      );
    }
  }
  this.value = this.lazy
    ? undefined
    : this.get();
};

/**
 * Evaluate the getter, and re-collect dependencies.
 */
Watcher.prototype.get = function get () {
  pushTarget(this);
  var value;
  var vm = this.vm;
  if (this.user) {
    try {
      value = this.getter.call(vm, vm);
    } catch (e) {
      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
    }
  } else {
    value = this.getter.call(vm, vm);
  }
  // "touch" every property so they are all tracked as
  // dependencies for deep watching
  if (this.deep) {
    traverse(value);
  }
  popTarget();
  this.cleanupDeps();
  return value
};

/**
 * Add a dependency to this directive.
 */
Watcher.prototype.addDep = function addDep (dep) {
  var id = dep.id;
  if (!this.newDepIds.has(id)) {
    this.newDepIds.add(id);
    this.newDeps.push(dep);
    if (!this.depIds.has(id)) {
      dep.addSub(this);
    }
  }
};

/**
 * Clean up for dependency collection.
 */
Watcher.prototype.cleanupDeps = function cleanupDeps () {
    var this$1 = this;

var i = this.deps.length;
  while (i--) {
    var dep = this$1.deps[i];
    if (!this$1.newDepIds.has(dep.id)) {
      dep.removeSub(this$1);
    }
  }
  var tmp = this.depIds;
  this.depIds = this.newDepIds;
  this.newDepIds = tmp;
  this.newDepIds.clear();
  tmp = this.deps;
  this.deps = this.newDeps;
  this.newDeps = tmp;
  this.newDeps.length = 0;
};

/**
 * Subscriber interface.
 * Will be called when a dependency changes.
 */
Watcher.prototype.update = function update () {
  /* istanbul ignore else */
  if (this.lazy) {
    this.dirty = true;
  } else if (this.sync) {
    this.run();
  } else {
    queueWatcher(this);
  }
};

/**
 * Scheduler job interface.
 * Will be called by the scheduler.
 */
Watcher.prototype.run = function run () {
  if (this.active) {
    var value = this.get();
    if (
      value !== this.value ||
      // Deep watchers and watchers on Object/Arrays should fire even
      // when the value is the same, because the value may
      // have mutated.
      isObject(value) ||
      this.deep
    ) {
      // set new value
      var oldValue = this.value;
      this.value = value;
      if (this.user) {
        try {
          this.cb.call(this.vm, value, oldValue);
        } catch (e) {
          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
        }
      } else {
        this.cb.call(this.vm, value, oldValue);
      }
    }
  }
};

/**
 * Evaluate the value of the watcher.
 * This only gets called for lazy watchers.
 */
Watcher.prototype.evaluate = function evaluate () {
  this.value = this.get();
  this.dirty = false;
};

/**
 * Depend on all deps collected by this watcher.
 */
Watcher.prototype.depend = function depend () {
    var this$1 = this;

var i = this.deps.length;
  while (i--) {
    this$1.deps[i].depend();
  }
};

/**
 * Remove self from all dependencies' subscriber list.
 */
Watcher.prototype.teardown = function teardown () {
    var this$1 = this;

if (this.active) {
    // remove self from vm's watcher list
    // this is a somewhat expensive operation so we skip it
    // if the vm is being destroyed.
    if (!this.vm._isBeingDestroyed) {
      remove(this.vm._watchers, this);
    }
    var i = this.deps.length;
    while (i--) {
      this$1.deps[i].removeSub(this$1);
    }
    this.active = false;
  }
};

/**
 * Recursively traverse an object to evoke all converted
 * getters, so that every nested property inside the object
 * is collected as a "deep" dependency.
 */
var seenObjects = new _Set();
function traverse (val) {
  seenObjects.clear();
  _traverse(val, seenObjects);
}

/*  */

var sharedPropertyDefinition = {
  enumerable: true,
  configurable: true,
  get: noop,
  set: noop
};

var isReservedProp = { key: 1, ref: 1, slot: 1 };

for (var key in propsOptions) loop( key );
  observerState.shouldConvert = true;
}

var computedWatcherOptions = { lazy: true };

function initComputed (vm, computed) {
  var watchers = vm._computedWatchers = Object.create(null);

for (var key in computed) {
    var userDef = computed[key];
    var getter = typeof userDef === 'function' ? userDef : userDef.get;
    // create internal watcher for the computed property.
    watchers[key] = new Watcher(vm, getter, noop, computedWatcherOptions);

// component-defined computed properties are already defined on the
    // component prototype. We only need to define computed properties defined
    // at instantiation here.
    if (!(key in vm)) {
      defineComputed(vm, key, userDef);
    }
  }
}

Vue.prototype.$set = set;
  Vue.prototype.$delete = del;

Vue.prototype.$watch = function (
    expOrFn,
    cb,
    options
  ) {
    var vm = this;
    options = options || {};
    options.user = true;
    var watcher = new Watcher(vm, expOrFn, cb, options);
    if (options.immediate) {
      cb.call(vm, watcher.value);
    }
    return function unwatchFn () {
      watcher.teardown();
    }
  };
}

/*  */

// hooks to be invoked on component VNodes during patch
var componentVNodeHooks = {
  init: function init (
    vnode,
    hydrating,
    parentElm,
    refElm
  ) {
    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
      var child = vnode.componentInstance = createComponentInstanceForVnode(
        vnode,
        activeInstance,
        parentElm,
        refElm
      );
      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
    } else if (vnode.data.keepAlive) {
      // kept-alive components, treat as a patch
      var mountedNode = vnode; // work around flow
      componentVNodeHooks.prepatch(mountedNode, mountedNode);
    }
  },

prepatch: function prepatch (oldVnode, vnode) {
    var options = vnode.componentOptions;
    var child = vnode.componentInstance = oldVnode.componentInstance;
    updateChildComponent(
      child,
      options.propsData, // updated props
      options.listeners, // updated listeners
      vnode, // new parent vnode
      options.children // new children
    );
  },

insert: function insert (vnode) {
    if (!vnode.componentInstance._isMounted) {
      vnode.componentInstance._isMounted = true;
      callHook(vnode.componentInstance, 'mounted');
    }
    if (vnode.data.keepAlive) {
      activateChildComponent(vnode.componentInstance, true /* direct */);
    }
  },

destroy: function destroy (vnode) {
    if (!vnode.componentInstance._isDestroyed) {
      if (!vnode.data.keepAlive) {
        vnode.componentInstance.$destroy();
      } else {
        deactivateChildComponent(vnode.componentInstance, true /* direct */);
      }
    }
  }
};

var hooksToMerge = Object.keys(componentVNodeHooks);

function createComponent (
  Ctor,
  data,
  context,
  children,
  tag
) {
  if (!Ctor) {
    return
  }

var baseCtor = context.$options._base;
  if (isObject(Ctor)) {
    Ctor = baseCtor.extend(Ctor);
  }

if (typeof Ctor !== 'function') {
    {
      warn(("Invalid Component definition: " + (String(Ctor))), context);
    }
    return
  }

// async component
  if (!Ctor.cid) {
    if (Ctor.resolved) {
      Ctor = Ctor.resolved;
    } else {
      Ctor = resolveAsyncComponent(Ctor, baseCtor, function () {
        // it's ok to queue this on every render because
        // $forceUpdate is buffered by the scheduler.
        context.$forceUpdate();
      });
      if (!Ctor) {
        // return nothing if this is indeed an async component
        // wait for the callback to trigger parent update.
        return
      }
    }
  }

// resolve constructor options in case global mixins are applied after
  // component constructor creation
  resolveConstructorOptions(Ctor);

data = data || {};

// transform component v-model data into props & events
  if (data.model) {
    transformModel(Ctor.options, data);
  }

// extract props
  var propsData = extractProps(data, Ctor);

// functional component
  if (Ctor.options.functional) {
    return createFunctionalComponent(Ctor, propsData, data, context, children)
  }

// extract listeners, since these needs to be treated as
  // child component listeners instead of DOM listeners
  var listeners = data.on;
  // replace with listeners with .native modifier
  data.on = data.nativeOn;

if (Ctor.options.abstract) {
    // abstract components do not keep anything
    // other than props & listeners
    data = {};
  }

// merge component management hooks onto the placeholder node
  mergeHooks(data);

// return a placeholder vnode
  var name = Ctor.options.name || tag;
  var vnode = new VNode(
    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
    data, undefined, undefined, undefined, context,
    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
  );
  return vnode
}

function resolveAsyncComponent (
  factory,
  baseCtor,
  cb
) {
  if (factory.requested) {
    // pool callbacks
    factory.pendingCallbacks.push(cb);
  } else {
    factory.requested = true;
    var cbs = factory.pendingCallbacks = [cb];
    var sync = true;

var reject = function (reason) {
      "development" !== 'production' && warn(
        "Failed to resolve async component: " + (String(factory)) +
        (reason ? ("\nReason: " + reason) : '')
      );
    };

var res = factory(resolve, reject);

// handle promise
    if (res && typeof res.then === 'function' && !factory.resolved) {
      res.then(resolve, reject);
    }

sync = false;
    // return in case resolved synchronously
    return factory.resolved
  }
}

function mergeHook$1 (one, two) {
  return function (a, b, c, d) {
    one(a, b, c, d);
    two(a, b, c, d);
  }
}

// transform component v-model info (value and callback) into
// prop and event handler respectively.
function transformModel (options, data) {
  var prop = (options.model && options.model.prop) || 'value';
  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
  var on = data.on || (data.on = {});
  if (on[event]) {
    on[event] = [data.model.callback].concat(on[event]);
  } else {
    on[event] = data.model.callback;
  }
}

/*  */

var SIMPLE_NORMALIZE = 1;
var ALWAYS_NORMALIZE = 2;

// wrapper function for providing a more flexible interface
// without getting yelled at by flow
function createElement (
  context,
  tag,
  data,
  children,
  normalizationType,
  alwaysNormalize
) {
  if (Array.isArray(data) || isPrimitive(data)) {
    normalizationType = children;
    children = data;
    data = undefined;
  }
  if (alwaysNormalize) { normalizationType = ALWAYS_NORMALIZE; }
  return _createElement(context, tag, data, children, normalizationType)
}

/*  */

/**
 * Runtime helper for rendering v-for lists.
 */
function renderList (
  val,
  render
) {
  var ret, i, l, keys, key;
  if (Array.isArray(val) || typeof val === 'string') {
    ret = new Array(val.length);
    for (i = 0, l = val.length; i < l; i++) {
      ret[i] = render(val[i], i);
    }
  } else if (typeof val === 'number') {
    ret = new Array(val);
    for (i = 0; i < val; i++) {
      ret[i] = render(i + 1, i);
    }
  } else if (isObject(val)) {
    keys = Object.keys(val);
    ret = new Array(keys.length);
    for (i = 0, l = keys.length; i < l; i++) {
      key = keys[i];
      ret[i] = render(val[key], key, i);
    }
  }
  return ret
}

/*  */

/**
 * Runtime helper for rendering <slot>
 */
function renderSlot (
  name,
  fallback,
  props,
  bindObject
) {
  var scopedSlotFn = this.$scopedSlots[name];
  if (scopedSlotFn) { // scoped slot
    props = props || {};
    if (bindObject) {
      extend(props, bindObject);
    }
    return scopedSlotFn(props) || fallback
  } else {
    var slotNodes = this.$slots[name];
    // warn duplicate slot usage
    if (slotNodes && "development" !== 'production') {
      slotNodes._rendered && warn(
        "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
        "- this will likely cause render errors.",
        this
      );
      slotNodes._rendered = true;
    }
    return slotNodes || fallback
  }
}

/*  */

/**
 * Runtime helper for resolving filters
 */
function resolveFilter (id) {
  return resolveAsset(this.$options, 'filters', id, true) || identity
}

/*  */

/**
 * Runtime helper for checking keyCodes from config.
 */
function checkKeyCodes (
  eventKeyCode,
  key,
  builtInAlias
) {
  var keyCodes = config.keyCodes[key] || builtInAlias;
  if (Array.isArray(keyCodes)) {
    return keyCodes.indexOf(eventKeyCode) === -1
  } else {
    return keyCodes !== eventKeyCode
  }
}

/*  */

/**
 * Runtime helper for merging v-bind="object" into a VNode's data.
 */
function bindObjectProps (
  data,
  tag,
  value,
  asProp
) {
  if (value) {
    if (!isObject(value)) {
      "development" !== 'production' && warn(
        'v-bind without argument expects an Object or Array value',
        this
      );
    } else {
      if (Array.isArray(value)) {
        value = toObject(value);
      }
      var hash;
      for (var key in value) {
        if (key === 'class' || key === 'style') {
          hash = data;
        } else {
          var type = data.attrs && data.attrs.type;
          hash = asProp || config.mustUseProp(tag, type, key)
            ? data.domProps || (data.domProps = {})
            : data.attrs || (data.attrs = {});
        }
        if (!(key in hash)) {
          hash[key] = value[key];
        }
      }
    }
  }
  return data
}

/*  */

/**
 * Runtime helper for rendering static trees.
 */
function renderStatic (
  index,
  isInFor
) {
  var tree = this._staticTrees[index];
  // if has already-rendered static tree and not inside v-for,
  // we can reuse the same tree by doing a shallow clone.
  if (tree && !isInFor) {
    return Array.isArray(tree)
      ? cloneVNodes(tree)
      : cloneVNode(tree)
  }
  // otherwise, render a fresh tree.
  tree = this._staticTrees[index] =
    this.$options.staticRenderFns[index].call(this._renderProxy);
  markStatic(tree, ("__static__" + index), false);
  return tree
}

/**
 * Runtime helper for v-once.
 * Effectively it means marking the node as static with a unique key.
 */
function markOnce (
  tree,
  index,
  key
) {
  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
  return tree
}

function markStaticNode (node, key, isOnce) {
  node.isStatic = true;
  node.key = key;
  node.isOnce = isOnce;
}

/*  */

function renderMixin (Vue) {
  Vue.prototype.$nextTick = function (fn) {
    return nextTick(fn, this)
  };

Vue.prototype._render = function () {
    var vm = this;
    var ref = vm.$options;
    var render = ref.render;
    var staticRenderFns = ref.staticRenderFns;
    var _parentVnode = ref._parentVnode;

if (vm._isMounted) {
      // clone slot nodes on re-renders
      for (var key in vm.$slots) {
        vm.$slots[key] = cloneVNodes(vm.$slots[key]);
      }
    }

vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;

if (staticRenderFns && !vm._staticTrees) {
      vm._staticTrees = [];
    }
    // set parent vnode. this allows render functions to have access
    // to the data on the placeholder node.
    vm.$vnode = _parentVnode;
    // render self
    var vnode;
    try {
      vnode = render.call(vm._renderProxy, vm.$createElement);
    } catch (e) {
      handleError(e, vm, "render function");
      // return error render result,
      // or previous vnode to prevent render error causing blank component
      /* istanbul ignore else */
      {
        vnode = vm.$options.renderError
          ? vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e)
          : vm._vnode;
      }
    }
    // return empty vnode in case the render function errored out
    if (!(vnode instanceof VNode)) {
      if ("development" !== 'production' && Array.isArray(vnode)) {
        warn(
          'Multiple root nodes returned from render function. Render function ' +
          'should return a single root node.',
          vm
        );
      }
      vnode = createEmptyVNode();
    }
    // set parent
    vnode.parent = _parentVnode;
    return vnode
  };

// internal render helpers.
  // these are exposed on the instance prototype to reduce generated render
  // code size.
  Vue.prototype._o = markOnce;
  Vue.prototype._n = toNumber;
  Vue.prototype._s = _toString;
  Vue.prototype._l = renderList;
  Vue.prototype._t = renderSlot;
  Vue.prototype._q = looseEqual;
  Vue.prototype._i = looseIndexOf;
  Vue.prototype._m = renderStatic;
  Vue.prototype._f = resolveFilter;
  Vue.prototype._k = checkKeyCodes;
  Vue.prototype._b = bindObjectProps;
  Vue.prototype._v = createTextVNode;
  Vue.prototype._e = createEmptyVNode;
  Vue.prototype._u = resolveScopedSlots;
}

/*  */

function initProvide (vm) {
  var provide = vm.$options.provide;
  if (provide) {
    vm._provided = typeof provide === 'function'
      ? provide.call(vm)
      : provide;
  }
}

function initInjections (vm) {
  var inject = vm.$options.inject;
  if (inject) {
    // inject is :any because flow is not smart enough to figure out cached
    // isArray here
    var isArray = Array.isArray(inject);
    var keys = isArray
      ? inject
      : hasSymbol
        ? Reflect.ownKeys(inject)
        : Object.keys(inject);

for (var i = 0; i < keys.length; i++) {
      var key = keys[i];
      var provideKey = isArray ? key : inject[key];
      var source = vm;
      while (source) {
        if (source._provided && provideKey in source._provided) {
          vm[key] = source._provided[provideKey];
          break
        }
        source = source.$parent;
      }
    }
  }
}

/*  */

var uid = 0;

function initMixin (Vue) {
  Vue.prototype._init = function (options) {
    /* istanbul ignore if */
    if ("development" !== 'production' && config.performance && mark) {
      mark('vue-perf-init');
    }

/* istanbul ignore if */
    if ("development" !== 'production' && config.performance && mark) {
      vm._name = formatComponentName(vm, false);
      mark('vue-perf-init-end');
      measure(((vm._name) + " init"), 'vue-perf-init', 'vue-perf-init-end');
    }

if (vm.$options.el) {
      vm.$mount(vm.$options.el);
    }
  };
}

function initInternalComponent (vm, options) {
  var opts = vm.$options = Object.create(vm.constructor.options);
  // doing this because it's faster than dynamic enumeration.
  opts.parent = options.parent;
  opts.propsData = options.propsData;
  opts._parentVnode = options._parentVnode;
  opts._parentListeners = options._parentListeners;
  opts._renderChildren = options._renderChildren;
  opts._componentTag = options._componentTag;
  opts._parentElm = options._parentElm;
  opts._refElm = options._refElm;
  if (options.render) {
    opts.render = options.render;
    opts.staticRenderFns = options.staticRenderFns;
  }
}

function Vue$3 (options) {
  if ("development" !== 'production' &&
    !(this instanceof Vue$3)) {
    warn('Vue is a constructor and should be called with the `new` keyword');
  }
  this._init(options);
}

initMixin(Vue$3);
stateMixin(Vue$3);
eventsMixin(Vue$3);
lifecycleMixin(Vue$3);
renderMixin(Vue$3);

/*  */

/*  */

function initMixin$1 (Vue) {
  Vue.mixin = function (mixin) {
    this.options = mergeOptions(this.options, mixin);
  };
}

/*  */

function initExtend (Vue) {
  /**
   * Each instance constructor, including Vue, has a unique
   * cid. This enables us to create wrapped "child
   * constructors" for prototypal inheritance and cache them.
   */
  Vue.cid = 0;
  var cid = 1;

/**
   * Class inheritance
   */
  Vue.extend = function (extendOptions) {
    extendOptions = extendOptions || {};
    var Super = this;
    var SuperId = Super.cid;
    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
    if (cachedCtors[SuperId]) {
      return cachedCtors[SuperId]
    }

var name = extendOptions.name || Super.options.name;
    {
      if (!/^[a-zA-Z][\w-]*$/.test(name)) {
        warn(
          'Invalid component name: "' + name + '". Component names ' +
          'can only contain alphanumeric characters and the hyphen, ' +
          'and must start with a letter.'
        );
      }
    }

var Sub = function VueComponent (options) {
      this._init(options);
    };
    Sub.prototype = Object.create(Super.prototype);
    Sub.prototype.constructor = Sub;
    Sub.cid = cid++;
    Sub.options = mergeOptions(
      Super.options,
      extendOptions
    );
    Sub['super'] = Super;

// For props and computed properties, we define the proxy getters on
    // the Vue instances at extension time, on the extended prototype. This
    // avoids Object.defineProperty calls for each instance created.
    if (Sub.options.props) {
      initProps$1(Sub);
    }
    if (Sub.options.computed) {
      initComputed$1(Sub);
    }

// allow further extension/mixin/plugin usage
    Sub.extend = Super.extend;
    Sub.mixin = Super.mixin;
    Sub.use = Super.use;

// create asset registers, so extended classes
    // can have their private assets too.
    config._assetTypes.forEach(function (type) {
      Sub[type] = Super[type];
    });
    // enable recursive self-lookup
    if (name) {
      Sub.options.components[name] = Sub;
    }

// keep a reference to the super options at extension time.
    // later at instantiation we can check if Super's options have
    // been updated.
    Sub.superOptions = Super.options;
    Sub.extendOptions = extendOptions;
    Sub.sealedOptions = extend({}, Sub.options);

// cache constructor
    cachedCtors[SuperId] = Sub;
    return Sub
  };
}

function initProps$1 (Comp) {
  var props = Comp.options.props;
  for (var key in props) {
    proxy(Comp.prototype, "_props", key);
  }
}

function initComputed$1 (Comp) {
  var computed = Comp.options.computed;
  for (var key in computed) {
    defineComputed(Comp.prototype, key, computed[key]);
  }
}

/*  */

/*  */

var patternTypes = [String, RegExp];

function getComponentName (opts) {
  return opts && (opts.Ctor.options.name || opts.tag)
}

function matches (pattern, name) {
  if (typeof pattern === 'string') {
    return pattern.split(',').indexOf(name) > -1
  } else if (pattern instanceof RegExp) {
    return pattern.test(name)
  }
  /* istanbul ignore next */
  return false
}

function pruneCacheEntry (vnode) {
  if (vnode) {
    if (!vnode.componentInstance._inactive) {
      callHook(vnode.componentInstance, 'deactivated');
    }
    vnode.componentInstance.$destroy();
  }
}

var KeepAlive = {
  name: 'keep-alive',
  abstract: true,

props: {
    include: patternTypes,
    exclude: patternTypes
  },

created: function created () {
    this.cache = Object.create(null);
  },

destroyed: function destroyed () {
    var this$1 = this;

for (var key in this$1.cache) {
      pruneCacheEntry(this$1.cache[key]);
    }
  },

watch: {
    include: function include (val) {
      pruneCache(this.cache, function (name) { return matches(val, name); });
    },
    exclude: function exclude (val) {
      pruneCache(this.cache, function (name) { return !matches(val, name); });
    }
  },

render: function render () {
    var vnode = getFirstComponentChild(this.$slots.default);
    var componentOptions = vnode && vnode.componentOptions;
    if (componentOptions) {
      // check pattern
      var name = getComponentName(componentOptions);
      if (name && (
        (this.include && !matches(this.include, name)) ||
        (this.exclude && matches(this.exclude, name))
      )) {
        return vnode
      }
      var key = vnode.key == null
        // same constructor may get registered as different local components
        // so cid alone is not enough (#3269)
        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
        : vnode.key;
      if (this.cache[key]) {
        vnode.componentInstance = this.cache[key].componentInstance;
      } else {
        this.cache[key] = vnode;
      }
      vnode.data.keepAlive = true;
    }
    return vnode
  }
};

var builtInComponents = {
  KeepAlive: KeepAlive
};

/*  */

// exposed util methods.
  // NOTE: these are not considered part of the public API - avoid relying on
  // them unless you are aware of the risk.
  Vue.util = {
    warn: warn,
    extend: extend,
    mergeOptions: mergeOptions,
    defineReactive: defineReactive$$1
  };

Vue.set = set;
  Vue.delete = del;
  Vue.nextTick = nextTick;

Vue.options = Object.create(null);
  config._assetTypes.forEach(function (type) {
    Vue.options[type + 's'] = Object.create(null);
  });

// this is used to identify the "base" constructor to extend all plain-object
  // components with in Weex's multi-instance scenarios.
  Vue.options._base = Vue;

extend(Vue.options.components, builtInComponents);

initUse(Vue);
  initMixin$1(Vue);
  initExtend(Vue);
  initAssetRegisters(Vue);
}

initGlobalAPI(Vue$3);

Object.defineProperty(Vue$3.prototype, '$isServer', {
  get: isServerRendering
});

Vue$3.version = '2.2.4';

/*  */

// attributes that should be using props for binding
var acceptValue = makeMap('input,textarea,option,select');
var mustUseProp = function (tag, type, attr) {
  return (
    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
    (attr === 'selected' && tag === 'option') ||
    (attr === 'checked' && tag === 'input') ||
    (attr === 'muted' && tag === 'video')
  )
};

var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');

var isBooleanAttr = makeMap(
  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
  'required,reversed,scoped,seamless,selected,sortable,translate,' +
  'truespeed,typemustmatch,visible'
);

var xlinkNS = 'http://www.w3.org/1999/xlink';

var isXlink = function (name) {
  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
};

var getXlinkProp = function (name) {
  return isXlink(name) ? name.slice(6, name.length) : ''
};

var isFalsyAttrValue = function (val) {
  return val == null || val === false
};

/*  */

function mergeClassData (child, parent) {
  return {
    staticClass: concat(child.staticClass, parent.staticClass),
    class: child.class
      ? [child.class, parent.class]
      : parent.class
  }
}

function genClassFromData (data) {
  var dynamicClass = data.class;
  var staticClass = data.staticClass;
  if (staticClass || dynamicClass) {
    return concat(staticClass, stringifyClass(dynamicClass))
  }
  /* istanbul ignore next */
  return ''
}

function concat (a, b) {
  return a ? b ? (a + ' ' + b) : a : (b || '')
}

/*  */

var namespaceMap = {
  svg: 'http://www.w3.org/2000/svg',
  math: 'http://www.w3.org/1998/Math/MathML'
};

var isHTMLTag = makeMap(
  'html,body,base,head,link,meta,style,title,' +
  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
  'div,dd,dl,dt,figcaption,figure,hr,img,li,main,ol,p,pre,ul,' +
  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
  'embed,object,param,source,canvas,script,noscript,del,ins,' +
  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
  'output,progress,select,textarea,' +
  'details,dialog,menu,menuitem,summary,' +
  'content,element,shadow,template'
);

// this map is intentionally selective, only covering SVG elements that may
// contain child elements.
var isSVG = makeMap(
  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
  true
);

var isPreTag = function (tag) { return tag === 'pre'; };

var isReservedTag = function (tag) {
  return isHTMLTag(tag) || isSVG(tag)
};

function getTagNamespace (tag) {
  if (isSVG(tag)) {
    return 'svg'
  }
  // basic support for MathML
  // note it doesn't support other MathML elements being component roots
  if (tag === 'math') {
    return 'math'
  }
}

/*  */

/**
 * Query an element selector if it's not an element already.
 */
function query (el) {
  if (typeof el === 'string') {
    var selected = document.querySelector(el);
    if (!selected) {
      "development" !== 'production' && warn(
        'Cannot find element: ' + el
      );
      return document.createElement('div')
    }
    return selected
  } else {
    return el
  }
}

/*  */

function createElement$1 (tagName, vnode) {
  var elm = document.createElement(tagName);
  if (tagName !== 'select') {
    return elm
  }
  // false or null will remove the attribute but undefined will not
  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
    elm.setAttribute('multiple', 'multiple');
  }
  return elm
}

function createElementNS (namespace, tagName) {
  return document.createElementNS(namespaceMap[namespace], tagName)
}

function createTextNode (text) {
  return document.createTextNode(text)
}

function createComment (text) {
  return document.createComment(text)
}

function insertBefore (parentNode, newNode, referenceNode) {
  parentNode.insertBefore(newNode, referenceNode);
}

function removeChild (node, child) {
  node.removeChild(child);
}

function appendChild (node, child) {
  node.appendChild(child);
}

function parentNode (node) {
  return node.parentNode
}

function nextSibling (node) {
  return node.nextSibling
}

function tagName (node) {
  return node.tagName
}

function setTextContent (node, text) {
  node.textContent = text;
}

function setAttribute (node, key, val) {
  node.setAttribute(key, val);
}

var nodeOps = Object.freeze({
	createElement: createElement$1,
	createElementNS: createElementNS,
	createTextNode: createTextNode,
	createComment: createComment,
	insertBefore: insertBefore,
	removeChild: removeChild,
	appendChild: appendChild,
	parentNode: parentNode,
	nextSibling: nextSibling,
	tagName: tagName,
	setTextContent: setTextContent,
	setAttribute: setAttribute
});

/*  */

function registerRef (vnode, isRemoval) {
  var key = vnode.data.ref;
  if (!key) { return }

/**
 * Virtual DOM patching algorithm based on Snabbdom by
 * Simon Friis Vindum (@paldepind)
 * Licensed under the MIT License
 * https://github.com/paldepind/snabbdom/blob/master/LICENSE
 *
 * modified by Evan You (@yyx990803)
 *

/*
 * Not type-checking this because this file is perf-critical and the cost
 * of making flow understand it is not worth it.
 */

var emptyNode = new VNode('', {}, []);

var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];

function isUndef (s) {
  return s == null
}

function isDef (s) {
  return s != null
}

function sameVnode (vnode1, vnode2) {
  return (
    vnode1.key === vnode2.key &&
    vnode1.tag === vnode2.tag &&
    vnode1.isComment === vnode2.isComment &&
    !vnode1.data === !vnode2.data
  )
}

function createPatchFunction (backend) {
  var i, j;
  var cbs = {};

var modules = backend.modules;
  var nodeOps = backend.nodeOps;

for (i = 0; i < hooks.length; ++i) {
    cbs[hooks[i]] = [];
    for (j = 0; j < modules.length; ++j) {
      if (modules[j][hooks[i]] !== undefined) { cbs[hooks[i]].push(modules[j][hooks[i]]); }
    }
  }

function emptyNodeAt (elm) {
    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
  }

function createRmCb (childElm, listeners) {
    function remove$$1 () {
      if (--remove$$1.listeners === 0) {
        removeNode(childElm);
      }
    }
    remove$$1.listeners = listeners;
    return remove$$1
  }

function removeNode (el) {
    var parent = nodeOps.parentNode(el);
    // element may have already been removed due to v-html / v-text
    if (parent) {
      nodeOps.removeChild(parent, el);
    }
  }

var inPre = 0;
  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
    vnode.isRootInsert = !nested; // for transition enter check
    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
      return
    }

/* istanbul ignore if */
      {
        createChildren(vnode, children, insertedVnodeQueue);
        if (isDef(data)) {
          invokeCreateHooks(vnode, insertedVnodeQueue);
        }
        insert(parentElm, vnode.elm, refElm);
      }

if ("development" !== 'production' && data && data.pre) {
        inPre--;
      }
    } else if (vnode.isComment) {
      vnode.elm = nodeOps.createComment(vnode.text);
      insert(parentElm, vnode.elm, refElm);
    } else {
      vnode.elm = nodeOps.createTextNode(vnode.text);
      insert(parentElm, vnode.elm, refElm);
    }
  }

function insert (parent, elm, ref) {
    if (parent) {
      if (ref) {
        nodeOps.insertBefore(parent, elm, ref);
      } else {
        nodeOps.appendChild(parent, elm);
      }
    }
  }

function isPatchable (vnode) {
    while (vnode.componentInstance) {
      vnode = vnode.componentInstance._vnode;
    }
    return isDef(vnode.tag)
  }

// set scope id attribute for scoped CSS.
  // this is implemented as a special case to avoid the overhead
  // of going through the normal attribute patching process.
  function setScope (vnode) {
    var i;
    var ancestor = vnode;
    while (ancestor) {
      if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
        nodeOps.setAttribute(vnode.elm, i, '');
      }
      ancestor = ancestor.parent;
    }
    // for slot content they should also get the scopeId from the host instance.
    if (isDef(i = activeInstance) &&
        i !== vnode.context &&
        isDef(i = i.$options._scopeId)) {
      nodeOps.setAttribute(vnode.elm, i, '');
    }
  }

function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
    for (; startIdx <= endIdx; ++startIdx) {
      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
    }
  }

function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
    var oldStartIdx = 0;
    var newStartIdx = 0;
    var oldEndIdx = oldCh.length - 1;
    var oldStartVnode = oldCh[0];
    var oldEndVnode = oldCh[oldEndIdx];
    var newEndIdx = newCh.length - 1;
    var newStartVnode = newCh[0];
    var newEndVnode = newCh[newEndIdx];
    var oldKeyToIdx, idxInOld, elmToMove, refElm;

// removeOnly is a special flag used only by <transition-group>
    // to ensure removed elements stay in correct relative positions
    // during leaving transitions
    var canMove = !removeOnly;

while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
      if (isUndef(oldStartVnode)) {
        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
      } else if (isUndef(oldEndVnode)) {
        oldEndVnode = oldCh[--oldEndIdx];
      } else if (sameVnode(oldStartVnode, newStartVnode)) {
        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
        oldStartVnode = oldCh[++oldStartIdx];
        newStartVnode = newCh[++newStartIdx];
      } else if (sameVnode(oldEndVnode, newEndVnode)) {
        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
        oldEndVnode = oldCh[--oldEndIdx];
        newEndVnode = newCh[--newEndIdx];
      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
        oldStartVnode = oldCh[++oldStartIdx];
        newEndVnode = newCh[--newEndIdx];
      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
        oldEndVnode = oldCh[--oldEndIdx];
        newStartVnode = newCh[++newStartIdx];
      } else {
        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
        idxInOld = isDef(newStartVnode.key) ? oldKeyToIdx[newStartVnode.key] : null;
        if (isUndef(idxInOld)) { // New element
          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
          newStartVnode = newCh[++newStartIdx];
        } else {
          elmToMove = oldCh[idxInOld];
          /* istanbul ignore if */
          if ("development" !== 'production' && !elmToMove) {
            warn(
              'It seems there are duplicate keys that is causing an update error. ' +
              'Make sure each v-for item has a unique key.'
            );
          }
          if (sameVnode(elmToMove, newStartVnode)) {
            patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
            oldCh[idxInOld] = undefined;
            canMove && nodeOps.insertBefore(parentElm, newStartVnode.elm, oldStartVnode.elm);
            newStartVnode = newCh[++newStartIdx];
          } else {
            // same key but different element. treat as new element
            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
            newStartVnode = newCh[++newStartIdx];
          }
        }
      }
    }
    if (oldStartIdx > oldEndIdx) {
      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
    } else if (newStartIdx > newEndIdx) {
      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
    }
  }

var bailed = false;
  // list of modules that can skip create hook during hydration because they
  // are already rendered on the client or has no need for initialization
  var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');

// Note: this is a browser-only function so we can assume elms are DOM nodes.
  function hydrate (elm, vnode, insertedVnodeQueue) {
    {
      if (!assertNodeMatch(elm, vnode)) {
        return false
      }
    }
    vnode.elm = elm;
    var tag = vnode.tag;
    var data = vnode.data;
    var children = vnode.children;
    if (isDef(data)) {
      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
      if (isDef(i = vnode.componentInstance)) {
        // child component. it should have hydrated its own tree.
        initComponent(vnode, insertedVnodeQueue);
        return true
      }
    }
    if (isDef(tag)) {
      if (isDef(children)) {
        // empty element, allow client to pick up and populate children
        if (!elm.hasChildNodes()) {
          createChildren(vnode, children, insertedVnodeQueue);
        } else {
          var childrenMatch = true;
          var childNode = elm.firstChild;
          for (var i$1 = 0; i$1 < children.length; i$1++) {
            if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
              childrenMatch = false;
              break
            }
            childNode = childNode.nextSibling;
          }
          // if childNode is not null, it means the actual childNodes list is
          // longer than the virtual children list.
          if (!childrenMatch || childNode) {
            if ("development" !== 'production' &&
                typeof console !== 'undefined' &&
                !bailed) {
              bailed = true;
              console.warn('Parent: ', elm);
              console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
            }
            return false
          }
        }
      }
      if (isDef(data)) {
        for (var key in data) {
          if (!isRenderedModule(key)) {
            invokeCreateHooks(vnode, insertedVnodeQueue);
            break
          }
        }
      }
    } else if (elm.data !== vnode.text) {
      elm.data = vnode.text;
    }
    return true
  }

function assertNodeMatch (node, vnode) {
    if (vnode.tag) {
      return (
        vnode.tag.indexOf('vue-component') === 0 ||
        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
      )
    } else {
      return node.nodeType === (vnode.isComment ? 8 : 3)
    }
  }

return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
    if (!vnode) {
      if (oldVnode) { invokeDestroyHook(oldVnode); }
      return
    }

var isInitialPatch = false;
    var insertedVnodeQueue = [];

if (!oldVnode) {
      // empty mount (likely as component), create new root element
      isInitialPatch = true;
      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
    } else {
      var isRealElement = isDef(oldVnode.nodeType);
      if (!isRealElement && sameVnode(oldVnode, vnode)) {
        // patch existing root node
        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
      } else {
        if (isRealElement) {
          // mounting to a real element
          // check if this is server-rendered content and if we can perform
          // a successful hydration.
          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute('server-rendered')) {
            oldVnode.removeAttribute('server-rendered');
            hydrating = true;
          }
          if (hydrating) {
            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
              invokeInsertHook(vnode, insertedVnodeQueue, true);
              return oldVnode
            } else {
              warn(
                'The client-side rendered virtual DOM tree is not matching ' +
                'server-rendered content. This is likely caused by incorrect ' +
                'HTML markup, for example nesting block-level elements inside ' +
                '<p>, or missing <tbody>. Bailing hydration and performing ' +
                'full client-side render.'
              );
            }
          }
          // either not server-rendered, or hydration failed.
          // create an empty node and replace it
          oldVnode = emptyNodeAt(oldVnode);
        }
        // replacing existing element
        var oldElm = oldVnode.elm;
        var parentElm$1 = nodeOps.parentNode(oldElm);
        createElm(
          vnode,
          insertedVnodeQueue,
          // extremely rare edge case: do not insert if old element is in a
          // leaving transition. Only happens when combining transition +
          // keep-alive + HOCs. (#4590)
          oldElm._leaveCb ? null : parentElm$1,
          nodeOps.nextSibling(oldElm)
        );

if (vnode.parent) {
          // component root element replaced.
          // update parent placeholder node element, recursively
          var ancestor = vnode.parent;
          while (ancestor) {
            ancestor.elm = vnode.elm;
            ancestor = ancestor.parent;
          }
          if (isPatchable(vnode)) {
            for (var i = 0; i < cbs.create.length; ++i) {
              cbs.create[i](emptyNode, vnode.parent);
            }
          }
        }

if (parentElm$1 !== null) {
          removeVnodes(parentElm$1, [oldVnode], 0, 0);
        } else if (isDef(oldVnode.tag)) {
          invokeDestroyHook(oldVnode);
        }
      }
    }

invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
    return vnode.elm
  }
}

/*  */

var directives = {
  create: updateDirectives,
  update: updateDirectives,
  destroy: function unbindDirectives (vnode) {
    updateDirectives(vnode, emptyNode);
  }
};

function updateDirectives (oldVnode, vnode) {
  if (oldVnode.data.directives || vnode.data.directives) {
    _update(oldVnode, vnode);
  }
}

function _update (oldVnode, vnode) {
  var isCreate = oldVnode === emptyNode;
  var isDestroy = vnode === emptyNode;
  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);

var dirsWithInsert = [];
  var dirsWithPostpatch = [];

var key, oldDir, dir;
  for (key in newDirs) {
    oldDir = oldDirs[key];
    dir = newDirs[key];
    if (!oldDir) {
      // new directive, bind
      callHook$1(dir, 'bind', vnode, oldVnode);
      if (dir.def && dir.def.inserted) {
        dirsWithInsert.push(dir);
      }
    } else {
      // existing directive, update
      dir.oldValue = oldDir.value;
      callHook$1(dir, 'update', vnode, oldVnode);
      if (dir.def && dir.def.componentUpdated) {
        dirsWithPostpatch.push(dir);
      }
    }
  }

if (dirsWithInsert.length) {
    var callInsert = function () {
      for (var i = 0; i < dirsWithInsert.length; i++) {
        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
      }
    };
    if (isCreate) {
      mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert);
    } else {
      callInsert();
    }
  }

if (dirsWithPostpatch.length) {
    mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', function () {
      for (var i = 0; i < dirsWithPostpatch.length; i++) {
        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
      }
    });
  }

if (!isCreate) {
    for (key in oldDirs) {
      if (!newDirs[key]) {
        // no longer present, unbind
        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
      }
    }
  }
}

var emptyModifiers = Object.create(null);

function getRawDirName (dir) {
  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
}

function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
  var fn = dir.def && dir.def[hook];
  if (fn) {
    fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
  }
}

var baseModules = [
  ref,
  directives
];

/*  */

for (key in attrs) {
    cur = attrs[key];
    old = oldAttrs[key];
    if (old !== cur) {
      setAttr(elm, key, cur);
    }
  }
  // #4391: in IE9, setting type can reset value for input[type=radio]
  /* istanbul ignore if */
  if (isIE9 && attrs.value !== oldAttrs.value) {
    setAttr(elm, 'value', attrs.value);
  }
  for (key in oldAttrs) {
    if (attrs[key] == null) {
      if (isXlink(key)) {
        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
      } else if (!isEnumeratedAttr(key)) {
        elm.removeAttribute(key);
      }
    }
  }
}

var attrs = {
  create: updateAttrs,
  update: updateAttrs
};

/*  */

function updateClass (oldVnode, vnode) {
  var el = vnode.elm;
  var data = vnode.data;
  var oldData = oldVnode.data;
  if (!data.staticClass && !data.class &&
      (!oldData || (!oldData.staticClass && !oldData.class))) {
    return
  }

var cls = genClassForVnode(vnode);

// handle transition classes
  var transitionClass = el._transitionClasses;
  if (transitionClass) {
    cls = concat(cls, stringifyClass(transitionClass));
  }

// set the class
  if (cls !== el._prevClass) {
    el.setAttribute('class', cls);
    el._prevClass = cls;
  }
}

var klass = {
  create: updateClass,
  update: updateClass
};

/*  */

var validDivisionCharRE = /[\w).+\-_$\]]/;

function parseFilters (exp) {
  var inSingle = false;
  var inDouble = false;
  var inTemplateString = false;
  var inRegex = false;
  var curly = 0;
  var square = 0;
  var paren = 0;
  var lastFilterIndex = 0;
  var c, prev, i, expression, filters;

for (i = 0; i < exp.length; i++) {
    prev = c;
    c = exp.charCodeAt(i);
    if (inSingle) {
      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
    } else if (inDouble) {
      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
    } else if (inTemplateString) {
      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
    } else if (inRegex) {
      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
    } else if (
      c === 0x7C && // pipe
      exp.charCodeAt(i + 1) !== 0x7C &&
      exp.charCodeAt(i - 1) !== 0x7C &&
      !curly && !square && !paren
    ) {
      if (expression === undefined) {
        // first filter, end of expression
        lastFilterIndex = i + 1;
        expression = exp.slice(0, i).trim();
      } else {
        pushFilter();
      }
    } else {
      switch (c) {
        case 0x22: inDouble = true; break         // "
        case 0x27: inSingle = true; break         // '
        case 0x60: inTemplateString = true; break // `
        case 0x28: paren++; break                 // (
        case 0x29: paren--; break                 // )
        case 0x5B: square++; break                // [
        case 0x5D: square--; break                // ]
        case 0x7B: curly++; break                 // {
        case 0x7D: curly--; break                 // }
      }
      if (c === 0x2f) { // /
        var j = i - 1;
        var p = (void 0);
        // find first non-whitespace prev char
        for (; j >= 0; j--) {
          p = exp.charAt(j);
          if (p !== ' ') { break }
        }
        if (!p || !validDivisionCharRE.test(p)) {
          inRegex = true;
        }
      }
    }
  }

if (expression === undefined) {
    expression = exp.slice(0, i).trim();
  } else if (lastFilterIndex !== 0) {
    pushFilter();
  }

function pushFilter () {
    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
    lastFilterIndex = i + 1;
  }

if (filters) {
    for (i = 0; i < filters.length; i++) {
      expression = wrapFilter(expression, filters[i]);
    }
  }

return expression
}

/*  */

function baseWarn (msg) {
  console.error(("[Vue compiler]: " + msg));
}

function pluckModuleFunction (
  modules,
  key
) {
  return modules
    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
    : []
}

function addProp (el, name, value) {
  (el.props || (el.props = [])).push({ name: name, value: value });
}

function addAttr (el, name, value) {
  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
}

function addDirective (
  el,
  name,
  rawName,
  value,
  arg,
  modifiers
) {
  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
}

function getBindingAttr (
  el,
  name,
  getStatic
) {
  var dynamicValue =
    getAndRemoveAttr(el, ':' + name) ||
    getAndRemoveAttr(el, 'v-bind:' + name);
  if (dynamicValue != null) {
    return parseFilters(dynamicValue)
  } else if (getStatic !== false) {
    var staticValue = getAndRemoveAttr(el, name);
    if (staticValue != null) {
      return JSON.stringify(staticValue)
    }
  }
}

/*  */

/**
 * Cross-platform code generation for component v-model
 */
function genComponentModel (
  el,
  value,
  modifiers
) {
  var ref = modifiers || {};
  var number = ref.number;
  var trim = ref.trim;

var baseValueExpression = '$$v';
  var valueExpression = baseValueExpression;
  if (trim) {
    valueExpression =
      "(typeof " + baseValueExpression + " === 'string'" +
        "? " + baseValueExpression + ".trim()" +
        ": " + baseValueExpression + ")";
  }
  if (number) {
    valueExpression = "_n(" + valueExpression + ")";
  }
  var assignment = genAssignmentCode(value, valueExpression);

el.model = {
    value: ("(" + value + ")"),
    expression: ("\"" + value + "\""),
    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
  };
}

/**
 * Cross-platform codegen helper for generating v-model value assignment code.
 */
function genAssignmentCode (
  value,
  assignment
) {
  var modelRs = parseModel(value);
  if (modelRs.idx === null) {
    return (value + "=" + assignment)
  } else {
    return "var $$exp = " + (modelRs.exp) + ", $$idx = " + (modelRs.idx) + ";" +
      "if (!Array.isArray($$exp)){" +
        value + "=" + assignment + "}" +
      "else{$$exp.splice($$idx, 1, " + assignment + ")}"
  }
}

/**
 * parse directive model to do the array update transform. a[idx] = val => $$a.splice($$idx, 1, val)
 *
 * for loop possible cases:
 *
 * - test
 * - test[idx]
 * - test[test1[idx]]
 * - test["a"][idx]
 * - xxx.test[a[a].test1[idx]]
 * - test.xxx.a["asa"][test1[idx]]
 *
 */

var len;
var str;
var chr;
var index$1;
var expressionPos;
var expressionEndPos;

function parseModel (val) {
  str = val;
  len = str.length;
  index$1 = expressionPos = expressionEndPos = 0;

if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
    return {
      exp: val,
      idx: null
    }
  }

while (!eof()) {
    chr = next();
    /* istanbul ignore if */
    if (isStringStart(chr)) {
      parseString(chr);
    } else if (chr === 0x5B) {
      parseBracket(chr);
    }
  }

return {
    exp: val.substring(0, expressionPos),
    idx: val.substring(expressionPos + 1, expressionEndPos)
  }
}

function next () {
  return str.charCodeAt(++index$1)
}

function eof () {
  return index$1 >= len
}

function isStringStart (chr) {
  return chr === 0x22 || chr === 0x27
}

function parseString (chr) {
  var stringQuote = chr;
  while (!eof()) {
    chr = next();
    if (chr === stringQuote) {
      break
    }
  }
}

/*  */

var warn$1;

// in some cases, the event used has to be determined at runtime
// so we used some reserved tokens during compile.
var RANGE_TOKEN = '__r';
var CHECKBOX_RADIO_TOKEN = '__c';

function model (
  el,
  dir,
  _warn
) {
  warn$1 = _warn;
  var value = dir.value;
  var modifiers = dir.modifiers;
  var tag = el.tag;
  var type = el.attrsMap.type;

{
    var dynamicType = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
    if (tag === 'input' && dynamicType) {
      warn$1(
        "<input :type=\"" + dynamicType + "\" v-model=\"" + value + "\">:\n" +
        "v-model does not support dynamic input types. Use v-if branches instead."
      );
    }
    // inputs with type="file" are read only and setting the input's
    // value will throw an error.
    if (tag === 'input' && type === 'file') {
      warn$1(
        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
        "File inputs are read only. Use a v-on:change listener instead."
      );
    }
  }

if (tag === 'select') {
    genSelect(el, value, modifiers);
  } else if (tag === 'input' && type === 'checkbox') {
    genCheckboxModel(el, value, modifiers);
  } else if (tag === 'input' && type === 'radio') {
    genRadioModel(el, value, modifiers);
  } else if (tag === 'input' || tag === 'textarea') {
    genDefaultModel(el, value, modifiers);
  } else if (!config.isReservedTag(tag)) {
    genComponentModel(el, value, modifiers);
    // component v-model doesn't need extra runtime
    return false
  } else {
    warn$1(
      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
      "v-model is not supported on this element type. " +
      'If you are working with contenteditable, it\'s recommended to ' +
      'wrap a library dedicated for that purpose inside a custom component.'
    );
  }

// ensure runtime directive metadata
  return true
}

function genRadioModel (
    el,
    value,
    modifiers
) {
  var number = modifiers && modifiers.number;
  var valueBinding = getBindingAttr(el, 'value') || 'null';
  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
  addHandler(el, CHECKBOX_RADIO_TOKEN, genAssignmentCode(value, valueBinding), null, true);
}

function genSelect (
    el,
    value,
    modifiers
) {
  var number = modifiers && modifiers.number;
  var selectedVal = "Array.prototype.filter" +
    ".call($event.target.options,function(o){return o.selected})" +
    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
    "return " + (number ? '_n(val)' : 'val') + "})";

var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
  var code = "var $$selectedVal = " + selectedVal + ";";
  code = code + " " + (genAssignmentCode(value, assignment));
  addHandler(el, 'change', code, null, true);
}

function genDefaultModel (
  el,
  value,
  modifiers
) {
  var type = el.attrsMap.type;
  var ref = modifiers || {};
  var lazy = ref.lazy;
  var number = ref.number;
  var trim = ref.trim;
  var needCompositionGuard = !lazy && type !== 'range';
  var event = lazy
    ? 'change'
    : type === 'range'
      ? RANGE_TOKEN
      : 'input';

var valueExpression = '$event.target.value';
  if (trim) {
    valueExpression = "$event.target.value.trim()";
  }
  if (number) {
    valueExpression = "_n(" + valueExpression + ")";
  }

var code = genAssignmentCode(value, valueExpression);
  if (needCompositionGuard) {
    code = "if($event.target.composing)return;" + code;
  }

addProp(el, 'value', ("(" + value + ")"));
  addHandler(el, event, code, null, true);
  if (trim || number || type === 'number') {
    addHandler(el, 'blur', '$forceUpdate()');
  }
}

/*  */

// normalize v-model event tokens that can only be determined at runtime.
// it's important to place the event as the first in the array because
// the whole point is ensuring the v-model callback gets called before
// user-attached handlers.
function normalizeEvents (on) {
  var event;
  /* istanbul ignore if */
  if (on[RANGE_TOKEN]) {
    // IE input[type=range] only supports `change` event
    event = isIE ? 'change' : 'input';
    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
    delete on[RANGE_TOKEN];
  }
  if (on[CHECKBOX_RADIO_TOKEN]) {
    // Chrome fires microtasks in between click/change, leads to #4521
    event = isChrome ? 'click' : 'change';
    on[event] = [].concat(on[CHECKBOX_RADIO_TOKEN], on[event] || []);
    delete on[CHECKBOX_RADIO_TOKEN];
  }
}

var target$1;

function remove$2 (
  event,
  handler,
  capture,
  _target
) {
  (_target || target$1).removeEventListener(event, handler, capture);
}

var events = {
  create: updateDOMListeners,
  update: updateDOMListeners
};

/*  */

for (key in oldProps) {
    if (props[key] == null) {
      elm[key] = '';
    }
  }
  for (key in props) {
    cur = props[key];
    // ignore children if the node has textContent or innerHTML,
    // as these will throw away existing DOM nodes and cause removal errors
    // on subsequent patches (#3360)
    if (key === 'textContent' || key === 'innerHTML') {
      if (vnode.children) { vnode.children.length = 0; }
      if (cur === oldProps[key]) { continue }
    }

if (key === 'value') {
      // store value as _value as well since
      // non-string values will be stringified
      elm._value = cur;
      // avoid resetting cursor position when value is the same
      var strCur = cur == null ? '' : String(cur);
      if (shouldUpdateValue(elm, vnode, strCur)) {
        elm.value = strCur;
      }
    } else {
      elm[key] = cur;
    }
  }
}

// check platforms/web/util/attrs.js acceptValue

function shouldUpdateValue (
  elm,
  vnode,
  checkVal
) {
  return (!elm.composing && (
    vnode.tag === 'option' ||
    isDirty(elm, checkVal) ||
    isInputChanged(elm, checkVal)
  ))
}

function isDirty (elm, checkVal) {
  // return true when textbox (.number and .trim) loses focus and its value is not equal to the updated value
  return document.activeElement !== elm && elm.value !== checkVal
}

function isInputChanged (elm, newVal) {
  var value = elm.value;
  var modifiers = elm._vModifiers; // injected by v-model runtime
  if ((modifiers && modifiers.number) || elm.type === 'number') {
    return toNumber(value) !== toNumber(newVal)
  }
  if (modifiers && modifiers.trim) {
    return value.trim() !== newVal.trim()
  }
  return value !== newVal
}

var domProps = {
  create: updateDOMProps,
  update: updateDOMProps
};

/*  */

// merge static and dynamic style data on the same vnode
function normalizeStyleData (data) {
  var style = normalizeStyleBinding(data.style);
  // static style is pre-processed into an object during compilation
  // and is always a fresh object, so it's safe to merge into it
  return data.staticStyle
    ? extend(data.staticStyle, style)
    : style
}

// normalize possible array / string values into Object
function normalizeStyleBinding (bindingStyle) {
  if (Array.isArray(bindingStyle)) {
    return toObject(bindingStyle)
  }
  if (typeof bindingStyle === 'string') {
    return parseStyleText(bindingStyle)
  }
  return bindingStyle
}

/**
 * parent component style should be after child's
 * so that parent component's style could override it
 */
function getStyle (vnode, checkChild) {
  var res = {};
  var styleData;

if (checkChild) {
    var childNode = vnode;
    while (childNode.componentInstance) {
      childNode = childNode.componentInstance._vnode;
      if (childNode.data && (styleData = normalizeStyleData(childNode.data))) {
        extend(res, styleData);
      }
    }
  }

if ((styleData = normalizeStyleData(vnode.data))) {
    extend(res, styleData);
  }

var parentNode = vnode;
  while ((parentNode = parentNode.parent)) {
    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
      extend(res, styleData);
    }
  }
  return res
}

/*  */

var prefixes = ['Webkit', 'Moz', 'ms'];

var testEl;
var normalize = cached(function (prop) {
  testEl = testEl || document.createElement('div');
  prop = camelize(prop);
  if (prop !== 'filter' && (prop in testEl.style)) {
    return prop
  }
  var upper = prop.charAt(0).toUpperCase() + prop.slice(1);
  for (var i = 0; i < prefixes.length; i++) {
    var prefixed = prefixes[i] + upper;
    if (prefixed in testEl.style) {
      return prefixed
    }
  }
});

function updateStyle (oldVnode, vnode) {
  var data = vnode.data;
  var oldData = oldVnode.data;

if (!data.staticStyle && !data.style &&
      !oldData.staticStyle && !oldData.style) {
    return
  }

var cur, name;
  var el = vnode.elm;
  var oldStaticStyle = oldVnode.data.staticStyle;
  var oldStyleBinding = oldVnode.data.style || {};

// if static style exists, stylebinding already merged into it when doing normalizeStyleData
  var oldStyle = oldStaticStyle || oldStyleBinding;

var style = normalizeStyleBinding(vnode.data.style) || {};

vnode.data.style = style.__ob__ ? extend({}, style) : style;

var newStyle = getStyle(vnode, true);

for (name in oldStyle) {
    if (newStyle[name] == null) {
      setProp(el, name, '');
    }
  }
  for (name in newStyle) {
    cur = newStyle[name];
    if (cur !== oldStyle[name]) {
      // ie9 setting to null has no effect, must use empty string
      setProp(el, name, cur == null ? '' : cur);
    }
  }
}

var style = {
  create: updateStyle,
  update: updateStyle
};

/*  */

/**
 * Add class with compatibility for SVG since classList is not supported on
 * SVG elements in IE
 */
function addClass (el, cls) {
  /* istanbul ignore if */
  if (!cls || !(cls = cls.trim())) {
    return
  }

/* istanbul ignore else */
  if (el.classList) {
    if (cls.indexOf(' ') > -1) {
      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
    } else {
      el.classList.add(cls);
    }
  } else {
    var cur = " " + (el.getAttribute('class') || '') + " ";
    if (cur.indexOf(' ' + cls + ' ') < 0) {
      el.setAttribute('class', (cur + cls).trim());
    }
  }
}

/**
 * Remove class with compatibility for SVG since classList is not supported on
 * SVG elements in IE
 */
function removeClass (el, cls) {
  /* istanbul ignore if */
  if (!cls || !(cls = cls.trim())) {
    return
  }

/* istanbul ignore else */
  if (el.classList) {
    if (cls.indexOf(' ') > -1) {
      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
    } else {
      el.classList.remove(cls);
    }
  } else {
    var cur = " " + (el.getAttribute('class') || '') + " ";
    var tar = ' ' + cls + ' ';
    while (cur.indexOf(tar) >= 0) {
      cur = cur.replace(tar, ' ');
    }
    el.setAttribute('class', cur.trim());
  }
}

/*  */

var autoCssTransition = cached(function (name) {
  return {
    enterClass: (name + "-enter"),
    enterToClass: (name + "-enter-to"),
    enterActiveClass: (name + "-enter-active"),
    leaveClass: (name + "-leave"),
    leaveToClass: (name + "-leave-to"),
    leaveActiveClass: (name + "-leave-active")
  }
});

var hasTransition = inBrowser && !isIE9;
var TRANSITION = 'transition';
var ANIMATION = 'animation';

// Transition property/event sniffing
var transitionProp = 'transition';
var transitionEndEvent = 'transitionend';
var animationProp = 'animation';
var animationEndEvent = 'animationend';
if (hasTransition) {
  /* istanbul ignore if */
  if (window.ontransitionend === undefined &&
    window.onwebkittransitionend !== undefined) {
    transitionProp = 'WebkitTransition';
    transitionEndEvent = 'webkitTransitionEnd';
  }
  if (window.onanimationend === undefined &&
    window.onwebkitanimationend !== undefined) {
    animationProp = 'WebkitAnimation';
    animationEndEvent = 'webkitAnimationEnd';
  }
}

// binding to window is necessary to make hot reload work in IE in strict mode
var raf = inBrowser && window.requestAnimationFrame
  ? window.requestAnimationFrame.bind(window)
  : setTimeout;

function nextFrame (fn) {
  raf(function () {
    raf(fn);
  });
}

function addTransitionClass (el, cls) {
  (el._transitionClasses || (el._transitionClasses = [])).push(cls);
  addClass(el, cls);
}

function removeTransitionClass (el, cls) {
  if (el._transitionClasses) {
    remove(el._transitionClasses, cls);
  }
  removeClass(el, cls);
}

var transformRE = /\b(transform|all)(,|$)/;

function getTransitionInfo (el, expectedType) {
  var styles = window.getComputedStyle(el);
  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
  var animationDelays = styles[animationProp + 'Delay'].split(', ');
  var animationDurations = styles[animationProp + 'Duration'].split(', ');
  var animationTimeout = getTimeout(animationDelays, animationDurations);

var type;
  var timeout = 0;
  var propCount = 0;
  /* istanbul ignore if */
  if (expectedType === TRANSITION) {
    if (transitionTimeout > 0) {
      type = TRANSITION;
      timeout = transitionTimeout;
      propCount = transitionDurations.length;
    }
  } else if (expectedType === ANIMATION) {
    if (animationTimeout > 0) {
      type = ANIMATION;
      timeout = animationTimeout;
      propCount = animationDurations.length;
    }
  } else {
    timeout = Math.max(transitionTimeout, animationTimeout);
    type = timeout > 0
      ? transitionTimeout > animationTimeout
        ? TRANSITION
        : ANIMATION
      : null;
    propCount = type
      ? type === TRANSITION
        ? transitionDurations.length
        : animationDurations.length
      : 0;
  }
  var hasTransform =
    type === TRANSITION &&
    transformRE.test(styles[transitionProp + 'Property']);
  return {
    type: type,
    timeout: timeout,
    propCount: propCount,
    hasTransform: hasTransform
  }
}

function getTimeout (delays, durations) {
  /* istanbul ignore next */
  while (delays.length < durations.length) {
    delays = delays.concat(delays);
  }

return Math.max.apply(null, durations.map(function (d, i) {
    return toMs(d) + toMs(delays[i])
  }))
}

function toMs (s) {
  return Number(s.slice(0, -1)) * 1000
}

/*  */

function enter (vnode, toggleDisplay) {
  var el = vnode.elm;

// call leave callback now
  if (el._leaveCb) {
    el._leaveCb.cancelled = true;
    el._leaveCb();
  }

var data = resolveTransition(vnode.data.transition);
  if (!data) {
    return
  }

/* istanbul ignore if */
  if (el._enterCb || el.nodeType !== 1) {
    return
  }

var css = data.css;
  var type = data.type;
  var enterClass = data.enterClass;
  var enterToClass = data.enterToClass;
  var enterActiveClass = data.enterActiveClass;
  var appearClass = data.appearClass;
  var appearToClass = data.appearToClass;
  var appearActiveClass = data.appearActiveClass;
  var beforeEnter = data.beforeEnter;
  var enter = data.enter;
  var afterEnter = data.afterEnter;
  var enterCancelled = data.enterCancelled;
  var beforeAppear = data.beforeAppear;
  var appear = data.appear;
  var afterAppear = data.afterAppear;
  var appearCancelled = data.appearCancelled;
  var duration = data.duration;

// activeInstance will always be the <transition> component managing this
  // transition. One edge case to check is when the <transition> is placed
  // as the root node of a child component. In that case we need to check
  // <transition>'s parent for appear check.
  var context = activeInstance;
  var transitionNode = activeInstance.$vnode;
  while (transitionNode && transitionNode.parent) {
    transitionNode = transitionNode.parent;
    context = transitionNode.context;
  }

var isAppear = !context._isMounted || !vnode.isRootInsert;

if (isAppear && !appear && appear !== '') {
    return
  }

var startClass = isAppear && appearClass
    ? appearClass
    : enterClass;
  var activeClass = isAppear && appearActiveClass
    ? appearActiveClass
    : enterActiveClass;
  var toClass = isAppear && appearToClass
    ? appearToClass
    : enterToClass;

var beforeEnterHook = isAppear
    ? (beforeAppear || beforeEnter)
    : beforeEnter;
  var enterHook = isAppear
    ? (typeof appear === 'function' ? appear : enter)
    : enter;
  var afterEnterHook = isAppear
    ? (afterAppear || afterEnter)
    : afterEnter;
  var enterCancelledHook = isAppear
    ? (appearCancelled || enterCancelled)
    : enterCancelled;

var explicitEnterDuration = toNumber(
    isObject(duration)
      ? duration.enter
      : duration
  );

if ("development" !== 'production' && explicitEnterDuration != null) {
    checkDuration(explicitEnterDuration, 'enter', vnode);
  }

var expectsCSS = css !== false && !isIE9;
  var userWantsControl = getHookArgumentsLength(enterHook);

if (!vnode.data.show) {
    // remove pending leave element on enter by injecting an insert hook
    mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', function () {
      var parent = el.parentNode;
      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
      if (pendingNode &&
          pendingNode.tag === vnode.tag &&
          pendingNode.elm._leaveCb) {
        pendingNode.elm._leaveCb();
      }
      enterHook && enterHook(el, cb);
    });
  }

// start enter transition
  beforeEnterHook && beforeEnterHook(el);
  if (expectsCSS) {
    addTransitionClass(el, startClass);
    addTransitionClass(el, activeClass);
    nextFrame(function () {
      addTransitionClass(el, toClass);
      removeTransitionClass(el, startClass);
      if (!cb.cancelled && !userWantsControl) {
        if (isValidDuration(explicitEnterDuration)) {
          setTimeout(cb, explicitEnterDuration);
        } else {
          whenTransitionEnds(el, type, cb);
        }
      }
    });
  }

if (vnode.data.show) {
    toggleDisplay && toggleDisplay();
    enterHook && enterHook(el, cb);
  }

if (!expectsCSS && !userWantsControl) {
    cb();
  }
}

function leave (vnode, rm) {
  var el = vnode.elm;

// call enter callback now
  if (el._enterCb) {
    el._enterCb.cancelled = true;
    el._enterCb();
  }

var data = resolveTransition(vnode.data.transition);
  if (!data) {
    return rm()
  }

/* istanbul ignore if */
  if (el._leaveCb || el.nodeType !== 1) {
    return
  }

var css = data.css;
  var type = data.type;
  var leaveClass = data.leaveClass;
  var leaveToClass = data.leaveToClass;
  var leaveActiveClass = data.leaveActiveClass;
  var beforeLeave = data.beforeLeave;
  var leave = data.leave;
  var afterLeave = data.afterLeave;
  var leaveCancelled = data.leaveCancelled;
  var delayLeave = data.delayLeave;
  var duration = data.duration;

var expectsCSS = css !== false && !isIE9;
  var userWantsControl = getHookArgumentsLength(leave);

var explicitLeaveDuration = toNumber(
    isObject(duration)
      ? duration.leave
      : duration
  );

if ("development" !== 'production' && explicitLeaveDuration != null) {
    checkDuration(explicitLeaveDuration, 'leave', vnode);
  }

if (delayLeave) {
    delayLeave(performLeave);
  } else {
    performLeave();
  }

// only used in dev mode
function checkDuration (val, name, vnode) {
  if (typeof val !== 'number') {
    warn(
      "<transition> explicit " + name + " duration is not a valid number - " +
      "got " + (JSON.stringify(val)) + ".",
      vnode.context
    );
  } else if (isNaN(val)) {
    warn(
      "<transition> explicit " + name + " duration is NaN - " +
      'the duration expression might be incorrect.',
      vnode.context
    );
  }
}

function isValidDuration (val) {
  return typeof val === 'number' && !isNaN(val)
}

/**
 * Normalize a transition hook's argument length. The hook may be:
 * - a merged hook (invoker) with the original in .fns
 * - a wrapped component method (check ._length)
 * - a plain function (.length)
 */
function getHookArgumentsLength (fn) {
  if (!fn) { return false }
  var invokerFns = fn.fns;
  if (invokerFns) {
    // invoker
    return getHookArgumentsLength(
      Array.isArray(invokerFns)
        ? invokerFns[0]
        : invokerFns
    )
  } else {
    return (fn._length || fn.length) > 1
  }
}

function _enter (_, vnode) {
  if (!vnode.data.show) {
    enter(vnode);
  }
}

var platformModules = [
  attrs,
  klass,
  events,
  domProps,
  style,
  transition
];

/*  */

// the directive module should be applied last, after all
// built-in modules have been applied.
var modules = platformModules.concat(baseModules);

var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });

/**
 * Not type checking this file because flow doesn't like attaching
 * properties to Elements.
 */

/* istanbul ignore if */
if (isIE9) {
  // http://www.matts411.com/post/internet-explorer-9-oninput/
  document.addEventListener('selectionchange', function () {
    var el = document.activeElement;
    if (el && el.vmodel) {
      trigger(el, 'input');
    }
  });
}

function hasNoMatchingOption (value, options) {
  for (var i = 0, l = options.length; i < l; i++) {
    if (looseEqual(getValue(options[i]), value)) {
      return false
    }
  }
  return true
}

function getValue (option) {
  return '_value' in option
    ? option._value
    : option.value
}

function onCompositionStart (e) {
  e.target.composing = true;
}

function onCompositionEnd (e) {
  e.target.composing = false;
  trigger(e.target, 'input');
}

function trigger (el, type) {
  var e = document.createEvent('HTMLEvents');
  e.initEvent(type, true, true);
  el.dispatchEvent(e);
}

/*  */

// recursively search for possible transition defined inside the component root
function locateNode (vnode) {
  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
    ? locateNode(vnode.componentInstance._vnode)
    : vnode
}

var show = {
  bind: function bind (el, ref, vnode) {
    var value = ref.value;

vnode = locateNode(vnode);
    var transition = vnode.data && vnode.data.transition;
    var originalDisplay = el.__vOriginalDisplay =
      el.style.display === 'none' ? '' : el.style.display;
    if (value && transition && !isIE9) {
      vnode.data.show = true;
      enter(vnode, function () {
        el.style.display = originalDisplay;
      });
    } else {
      el.style.display = value ? originalDisplay : 'none';
    }
  },

update: function update (el, ref, vnode) {
    var value = ref.value;
    var oldValue = ref.oldValue;

/* istanbul ignore if */
    if (value === oldValue) { return }
    vnode = locateNode(vnode);
    var transition = vnode.data && vnode.data.transition;
    if (transition && !isIE9) {
      vnode.data.show = true;
      if (value) {
        enter(vnode, function () {
          el.style.display = el.__vOriginalDisplay;
        });
      } else {
        leave(vnode, function () {
          el.style.display = 'none';
        });
      }
    } else {
      el.style.display = value ? el.__vOriginalDisplay : 'none';
    }
  },

unbind: function unbind (
    el,
    binding,
    vnode,
    oldVnode,
    isDestroy
  ) {
    if (!isDestroy) {
      el.style.display = el.__vOriginalDisplay;
    }
  }
};

var platformDirectives = {
  model: model$1,
  show: show
};

/*  */

// Provides transition support for a single element/component.
// supports transition mode (out-in / in-out)

var transitionProps = {
  name: String,
  appear: Boolean,
  css: Boolean,
  mode: String,
  type: String,
  enterClass: String,
  leaveClass: String,
  enterToClass: String,
  leaveToClass: String,
  enterActiveClass: String,
  leaveActiveClass: String,
  appearClass: String,
  appearActiveClass: String,
  appearToClass: String,
  duration: [Number, String, Object]
};

// in case the child is also an abstract component, e.g. <keep-alive>
// we want to recursively retrieve the real component to be rendered
function getRealChild (vnode) {
  var compOptions = vnode && vnode.componentOptions;
  if (compOptions && compOptions.Ctor.options.abstract) {
    return getRealChild(getFirstComponentChild(compOptions.children))
  } else {
    return vnode
  }
}

function placeholder (h, rawChild) {
  return /\d-keep-alive$/.test(rawChild.tag)
    ? h('keep-alive')
    : null
}

function hasParentTransition (vnode) {
  while ((vnode = vnode.parent)) {
    if (vnode.data.transition) {
      return true
    }
  }
}

function isSameChild (child, oldChild) {
  return oldChild.key === child.key && oldChild.tag === child.tag
}

var Transition = {
  name: 'transition',
  props: transitionProps,
  abstract: true,

render: function render (h) {
    var this$1 = this;

var children = this.$slots.default;
    if (!children) {
      return
    }

// filter out text nodes (possible whitespaces)
    children = children.filter(function (c) { return c.tag; });
    /* istanbul ignore if */
    if (!children.length) {
      return
    }

// warn multiple elements
    if ("development" !== 'production' && children.length > 1) {
      warn(
        '<transition> can only be used on a single element. Use ' +
        '<transition-group> for lists.',
        this.$parent
      );
    }

var mode = this.mode;

// warn invalid mode
    if ("development" !== 'production' &&
        mode && mode !== 'in-out' && mode !== 'out-in') {
      warn(
        'invalid <transition> mode: ' + mode,
        this.$parent
      );
    }

var rawChild = children[0];

// if this is a component root node and the component's
    // parent container node also has transition, skip.
    if (hasParentTransition(this.$vnode)) {
      return rawChild
    }

// apply transition data to child
    // use getRealChild() to ignore abstract components e.g. keep-alive
    var child = getRealChild(rawChild);
    /* istanbul ignore if */
    if (!child) {
      return rawChild
    }

if (this._leaving) {
      return placeholder(h, rawChild)
    }

// ensure a key that is unique to the vnode type and to this transition
    // component instance. This key will be used to remove pending leaving nodes
    // during entering.
    var id = "__transition-" + (this._uid) + "-";
    child.key = child.key == null
      ? id + child.tag
      : isPrimitive(child.key)
        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
        : child.key;

var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
    var oldRawChild = this._vnode;
    var oldChild = getRealChild(oldRawChild);

// mark v-show
    // so that the transition module can hand over the control to the directive
    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
      child.data.show = true;
    }

if (oldChild && oldChild.data && !isSameChild(child, oldChild)) {
      // replace old child transition data with fresh one
      // important for dynamic transitions!
      var oldData = oldChild && (oldChild.data.transition = extend({}, data));
      // handle transition mode
      if (mode === 'out-in') {
        // return placeholder node and queue update when leave finishes
        this._leaving = true;
        mergeVNodeHook(oldData, 'afterLeave', function () {
          this$1._leaving = false;
          this$1.$forceUpdate();
        });
        return placeholder(h, rawChild)
      } else if (mode === 'in-out') {
        var delayedLeave;
        var performLeave = function () { delayedLeave(); };
        mergeVNodeHook(data, 'afterEnter', performLeave);
        mergeVNodeHook(data, 'enterCancelled', performLeave);
        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
      }
    }

return rawChild
  }
};

/*  */

// Provides transition support for list items.
// supports move transitions using the FLIP technique.

// Because the vdom's children update algorithm is "unstable" - i.e.
// it doesn't guarantee the relative positioning of removed elements,
// we force transition-group to update its children into two passes:
// in the first pass, we remove all nodes that need to be removed,
// triggering their leaving transition; in the second pass, we insert/move
// into the final desired state. This way in the second pass removed
// nodes will remain where they should be.

var props = extend({
  tag: String,
  moveClass: String
}, transitionProps);

delete props.mode;

var TransitionGroup = {
  props: props,

render: function render (h) {
    var tag = this.tag || this.$vnode.data.tag || 'span';
    var map = Object.create(null);
    var prevChildren = this.prevChildren = this.children;
    var rawChildren = this.$slots.default || [];
    var children = this.children = [];
    var transitionData = extractTransitionData(this);

for (var i = 0; i < rawChildren.length; i++) {
      var c = rawChildren[i];
      if (c.tag) {
        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
          children.push(c);
          map[c.key] = c
          ;(c.data || (c.data = {})).transition = transitionData;
        } else {
          var opts = c.componentOptions;
          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
          warn(("<transition-group> children must be keyed: <" + name + ">"));
        }
      }
    }

if (prevChildren) {
      var kept = [];
      var removed = [];
      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
        var c$1 = prevChildren[i$1];
        c$1.data.transition = transitionData;
        c$1.data.pos = c$1.elm.getBoundingClientRect();
        if (map[c$1.key]) {
          kept.push(c$1);
        } else {
          removed.push(c$1);
        }
      }
      this.kept = h(tag, null, kept);
      this.removed = removed;
    }

return h(tag, null, children)
  },

beforeUpdate: function beforeUpdate () {
    // force removing pass
    this.__patch__(
      this._vnode,
      this.kept,
      false, // hydrating
      true // removeOnly (!important, avoids unnecessary moves)
    );
    this._vnode = this.kept;
  },

updated: function updated () {
    var children = this.prevChildren;
    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
      return
    }

// we divide the work into three loops to avoid mixing DOM reads and writes
    // in each iteration - which helps prevent layout thrashing.
    children.forEach(callPendingCbs);
    children.forEach(recordPosition);
    children.forEach(applyTranslation);

// force reflow to put everything in position
    var body = document.body;
    var f = body.offsetHeight; // eslint-disable-line

children.forEach(function (c) {
      if (c.data.moved) {
        var el = c.elm;
        var s = el.style;
        addTransitionClass(el, moveClass);
        s.transform = s.WebkitTransform = s.transitionDuration = '';
        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
          if (!e || /transform$/.test(e.propertyName)) {
            el.removeEventListener(transitionEndEvent, cb);
            el._moveCb = null;
            removeTransitionClass(el, moveClass);
          }
        });
      }
    });
  },

methods: {
    hasMove: function hasMove (el, moveClass) {
      /* istanbul ignore if */
      if (!hasTransition) {
        return false
      }
      if (this._hasMove != null) {
        return this._hasMove
      }
      // Detect whether an element with the move class applied has
      // CSS transitions. Since the element may be inside an entering
      // transition at this very moment, we make a clone of it and remove
      // all other transition classes applied to ensure only the move class
      // is applied.
      var clone = el.cloneNode();
      if (el._transitionClasses) {
        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
      }
      addClass(clone, moveClass);
      clone.style.display = 'none';
      this.$el.appendChild(clone);
      var info = getTransitionInfo(clone);
      this.$el.removeChild(clone);
      return (this._hasMove = info.hasTransform)
    }
  }
};

function callPendingCbs (c) {
  /* istanbul ignore if */
  if (c.elm._moveCb) {
    c.elm._moveCb();
  }
  /* istanbul ignore if */
  if (c.elm._enterCb) {
    c.elm._enterCb();
  }
}

function recordPosition (c) {
  c.data.newPos = c.elm.getBoundingClientRect();
}

function applyTranslation (c) {
  var oldPos = c.data.pos;
  var newPos = c.data.newPos;
  var dx = oldPos.left - newPos.left;
  var dy = oldPos.top - newPos.top;
  if (dx || dy) {
    c.data.moved = true;
    var s = c.elm.style;
    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
    s.transitionDuration = '0s';
  }
}

var platformComponents = {
  Transition: Transition,
  TransitionGroup: TransitionGroup
};

/*  */

// install platform specific utils
Vue$3.config.mustUseProp = mustUseProp;
Vue$3.config.isReservedTag = isReservedTag;
Vue$3.config.getTagNamespace = getTagNamespace;
Vue$3.config.isUnknownElement = isUnknownElement;

// install platform runtime directives & components
extend(Vue$3.options.directives, platformDirectives);
extend(Vue$3.options.components, platformComponents);

// install platform patch function
Vue$3.prototype.__patch__ = inBrowser ? patch : noop;

// public mount method
Vue$3.prototype.$mount = function (
  el,
  hydrating
) {
  el = el && inBrowser ? query(el) : undefined;
  return mountComponent(this, el, hydrating)
};

// devtools global hook
/* istanbul ignore next */
setTimeout(function () {
  if (config.devtools) {
    if (devtools) {
      devtools.emit('init', Vue$3);
    } else if ("development" !== 'production' && isChrome) {
      console[console.info ? 'info' : 'log'](
        'Download the Vue Devtools extension for a better development experience:\n' +
        'https://github.com/vuejs/vue-devtools'
      );
    }
  }
  if ("development" !== 'production' &&
      config.productionTip !== false &&
      inBrowser && typeof console !== 'undefined') {
    console[console.info ? 'info' : 'log'](
      "You are running Vue in development mode.\n" +
      "Make sure to turn on production mode when deploying for production.\n" +
      "See more tips at https://vuejs.org/guide/deployment.html"
    );
  }
}, 0);

/*  */

// check whether current browser encodes a char inside attribute values
function shouldDecode (content, encoded) {
  var div = document.createElement('div');
  div.innerHTML = "<div a=\"" + content + "\">";
  return div.innerHTML.indexOf(encoded) > 0
}

// #3663
// IE encodes newlines inside attribute values while other browsers don't
var shouldDecodeNewlines = inBrowser ? shouldDecode('\n', '&#10;') : false;

/*  */

var isUnaryTag = makeMap(
  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
  'link,meta,param,source,track,wbr'
);

// Elements that you can, intentionally, leave open
// (and which close themselves)
var canBeLeftOpenTag = makeMap(
  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
);

// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
var isNonPhrasingTag = makeMap(
  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
  'title,tr,track'
);

/*  */

var decoder;

function decode (html) {
  decoder = decoder || document.createElement('div');
  decoder.innerHTML = html;
  return decoder.textContent
}

/**
 * Not type-checking this file because it's mostly vendor code.
 */

/*!
 * HTML Parser By John Resig (ejohn.org)
 * Modified by Juriy "kangax" Zaytsev
 * Original code by Erik Arvidsson, Mozilla Public License
 * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
 */

// Regular Expressions for parsing tags and attributes
var singleAttrIdentifier = /([^\s"'<>/=]+)/;
var singleAttrAssign = /(?:=)/;
var singleAttrValues = [
  // attr value double quotes
  /"([^"]*)"+/.source,
  // attr value, single quotes
  /'([^']*)'+/.source,
  // attr value, no quotes
  /([^\s"'=<>`]+)/.source
];
var attribute = new RegExp(
  '^\\s*' + singleAttrIdentifier.source +
  '(?:\\s*(' + singleAttrAssign.source + ')' +
  '\\s*(?:' + singleAttrValues.join('|') + '))?'
);

// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
// but for Vue templates we can enforce a simple charset
var ncname = '[a-zA-Z_][\\w\\-\\.]*';
var qnameCapture = '((?:' + ncname + '\\:)?' + ncname + ')';
var startTagOpen = new RegExp('^<' + qnameCapture);
var startTagClose = /^\s*(\/?)>/;
var endTag = new RegExp('^<\\/' + qnameCapture + '[^>]*>');
var doctype = /^<!DOCTYPE [^>]+>/i;
var comment = /^<!--/;
var conditionalComment = /^<!\[/;

var IS_REGEX_CAPTURING_BROKEN = false;
'x'.replace(/x(.)?/g, function (m, g) {
  IS_REGEX_CAPTURING_BROKEN = g === '';
});

// Special Elements (can contain anything)
var isPlainTextElement = makeMap('script,style,textarea', true);
var reCache = {};

var decodingMap = {
  '&lt;': '<',
  '&gt;': '>',
  '&quot;': '"',
  '&amp;': '&',
  '&#10;': '\n'
};
var encodedAttr = /&(?:lt|gt|quot|amp);/g;
var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10);/g;

function decodeAttr (value, shouldDecodeNewlines) {
  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
  return value.replace(re, function (match) { return decodingMap[match]; })
}

function parseHTML (html, options) {
  var stack = [];
  var expectHTML = options.expectHTML;
  var isUnaryTag$$1 = options.isUnaryTag || no;
  var index = 0;
  var last, lastTag;
  while (html) {
    last = html;
    // Make sure we're not in a plaintext content element like script/style
    if (!lastTag || !isPlainTextElement(lastTag)) {
      var textEnd = html.indexOf('<');
      if (textEnd === 0) {
        // Comment:
        if (comment.test(html)) {
          var commentEnd = html.indexOf('-->');

if (commentEnd >= 0) {
            advance(commentEnd + 3);
            continue
          }
        }

// http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
        if (conditionalComment.test(html)) {
          var conditionalEnd = html.indexOf(']>');

if (conditionalEnd >= 0) {
            advance(conditionalEnd + 2);
            continue
          }
        }

// Doctype:
        var doctypeMatch = html.match(doctype);
        if (doctypeMatch) {
          advance(doctypeMatch[0].length);
          continue
        }

// End tag:
        var endTagMatch = html.match(endTag);
        if (endTagMatch) {
          var curIndex = index;
          advance(endTagMatch[0].length);
          parseEndTag(endTagMatch[1], curIndex, index);
          continue
        }

// Start tag:
        var startTagMatch = parseStartTag();
        if (startTagMatch) {
          handleStartTag(startTagMatch);
          continue
        }
      }

if (textEnd < 0) {
        text = html;
        html = '';
      }

if (options.chars && text) {
        options.chars(text);
      }
    } else {
      var stackedTag = lastTag.toLowerCase();
      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
      var endTagLength = 0;
      var rest = html.replace(reStackedTag, function (all, text, endTag) {
        endTagLength = endTag.length;
        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
          text = text
            .replace(//g, '$1')
            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
        }
        if (options.chars) {
          options.chars(text);
        }
        return ''
      });
      index += html.length - rest.length;
      html = rest;
      parseEndTag(stackedTag, index - endTagLength, index);
    }

if (html === last) {
      options.chars && options.chars(html);
      if ("development" !== 'production' && !stack.length && options.warn) {
        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
      }
      break
    }
  }

// Clean up any remaining tags
  parseEndTag();

function advance (n) {
    index += n;
    html = html.substring(n);
  }

function handleStartTag (match) {
    var tagName = match.tagName;
    var unarySlash = match.unarySlash;

if (expectHTML) {
      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
        parseEndTag(lastTag);
      }
      if (canBeLeftOpenTag(tagName) && lastTag === tagName) {
        parseEndTag(tagName);
      }
    }

var unary = isUnaryTag$$1(tagName) || tagName === 'html' && lastTag === 'head' || !!unarySlash;

if (!unary) {
      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
      lastTag = tagName;
    }

if (options.start) {
      options.start(tagName, attrs, unary, match.start, match.end);
    }
  }

function parseEndTag (tagName, start, end) {
    var pos, lowerCasedTagName;
    if (start == null) { start = index; }
    if (end == null) { end = index; }

if (tagName) {
      lowerCasedTagName = tagName.toLowerCase();
    }

// Find the closest opened tag of the same type
    if (tagName) {
      for (pos = stack.length - 1; pos >= 0; pos--) {
        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
          break
        }
      }
    } else {
      // If no tag name is provided, clean shop
      pos = 0;
    }

if (pos >= 0) {
      // Close all the open elements, up the stack
      for (var i = stack.length - 1; i >= pos; i--) {
        if ("development" !== 'production' &&
            (i > pos || !tagName) &&
            options.warn) {
          options.warn(
            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
          );
        }
        if (options.end) {
          options.end(stack[i].tag, start, end);
        }
      }

// Remove the open elements from the stack
      stack.length = pos;
      lastTag = pos && stack[pos - 1].tag;
    } else if (lowerCasedTagName === 'br') {
      if (options.start) {
        options.start(tagName, [], true, start, end);
      }
    } else if (lowerCasedTagName === 'p') {
      if (options.start) {
        options.start(tagName, [], false, start, end);
      }
      if (options.end) {
        options.end(tagName, start, end);
      }
    }
  }
}

/*  */

var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;

var buildRegex = cached(function (delimiters) {
  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
});

/*  */

var onRE = /^@|^v-on:/;
var dirRE = /^v-|^@|^:/;
var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
var forIteratorRE = /$(\{[^}]*\}|[^,]*),([^,]*)(?:,([^,]*))?$/;

var argRE = /:(.*)$/;
var bindRE = /^:|^v-bind:/;
var modifierRE = /\.[^.]+/g;

var decodeHTMLCached = cached(decode);

// configurable state
var warn$2;
var delimiters;
var transforms;
var preTransforms;
var postTransforms;
var platformIsPreTag;
var platformMustUseProp;
var platformGetTagNamespace;

/**
 * Convert HTML string to AST.
 */
function parse (
  template,
  options
) {
  warn$2 = options.warn || baseWarn;
  platformGetTagNamespace = options.getTagNamespace || no;
  platformMustUseProp = options.mustUseProp || no;
  platformIsPreTag = options.isPreTag || no;
  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
  transforms = pluckModuleFunction(options.modules, 'transformNode');
  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
  delimiters = options.delimiters;

var stack = [];
  var preserveWhitespace = options.preserveWhitespace !== false;
  var root;
  var currentParent;
  var inVPre = false;
  var inPre = false;
  var warned = false;

function warnOnce (msg) {
    if (!warned) {
      warned = true;
      warn$2(msg);
    }
  }

function endPre (element) {
    // check pre state
    if (element.pre) {
      inVPre = false;
    }
    if (platformIsPreTag(element.tag)) {
      inPre = false;
    }
  }

parseHTML(template, {
    warn: warn$2,
    expectHTML: options.expectHTML,
    isUnaryTag: options.isUnaryTag,
    shouldDecodeNewlines: options.shouldDecodeNewlines,
    start: function start (tag, attrs, unary) {
      // check namespace.
      // inherit parent ns if there is one
      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);

// handle IE svg bug
      /* istanbul ignore if */
      if (isIE && ns === 'svg') {
        attrs = guardIESVGBug(attrs);
      }

var element = {
        type: 1,
        tag: tag,
        attrsList: attrs,
        attrsMap: makeAttrsMap(attrs),
        parent: currentParent,
        children: []
      };
      if (ns) {
        element.ns = ns;
      }

if (isForbiddenTag(element) && !isServerRendering()) {
        element.forbidden = true;
        "development" !== 'production' && warn$2(
          'Templates should only be responsible for mapping the state to the ' +
          'UI. Avoid placing tags with side-effects in your templates, such as ' +
          "<" + tag + ">" + ', as they will not be parsed.'
        );
      }

// apply pre-transforms
      for (var i = 0; i < preTransforms.length; i++) {
        preTransforms[i](element, options);
      }

if (!inVPre) {
        processPre(element);
        if (element.pre) {
          inVPre = true;
        }
      }
      if (platformIsPreTag(element.tag)) {
        inPre = true;
      }
      if (inVPre) {
        processRawAttrs(element);
      } else {
        processFor(element);
        processIf(element);
        processOnce(element);
        processKey(element);

// determine whether this is a plain element after
        // removing structural attributes
        element.plain = !element.key && !attrs.length;

processRef(element);
        processSlot(element);
        processComponent(element);
        for (var i$1 = 0; i$1 < transforms.length; i$1++) {
          transforms[i$1](element, options);
        }
        processAttrs(element);
      }

function checkRootConstraints (el) {
        {
          if (el.tag === 'slot' || el.tag === 'template') {
            warnOnce(
              "Cannot use <" + (el.tag) + "> as component root element because it may " +
              'contain multiple nodes.'
            );
          }
          if (el.attrsMap.hasOwnProperty('v-for')) {
            warnOnce(
              'Cannot use v-for on stateful component root element because ' +
              'it renders multiple elements.'
            );
          }
        }
      }

// tree management
      if (!root) {
        root = element;
        checkRootConstraints(root);
      } else if (!stack.length) {
        // allow root elements with v-if, v-else-if and v-else
        if (root.if && (element.elseif || element.else)) {
          checkRootConstraints(element);
          addIfCondition(root, {
            exp: element.elseif,
            block: element
          });
        } else {
          warnOnce(
            "Component template should contain exactly one root element. " +
            "If you are using v-if on multiple elements, " +
            "use v-else-if to chain them instead."
          );
        }
      }
      if (currentParent && !element.forbidden) {
        if (element.elseif || element.else) {
          processIfConditions(element, currentParent);
        } else if (element.slotScope) { // scoped slot
          currentParent.plain = false;
          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
        } else {
          currentParent.children.push(element);
          element.parent = currentParent;
        }
      }
      if (!unary) {
        currentParent = element;
        stack.push(element);
      } else {
        endPre(element);
      }
      // apply post-transforms
      for (var i$2 = 0; i$2 < postTransforms.length; i$2++) {
        postTransforms[i$2](element, options);
      }
    },

end: function end () {
      // remove trailing whitespace
      var element = stack[stack.length - 1];
      var lastNode = element.children[element.children.length - 1];
      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
        element.children.pop();
      }
      // pop stack
      stack.length -= 1;
      currentParent = stack[stack.length - 1];
      endPre(element);
    },

chars: function chars (text) {
      if (!currentParent) {
        {
          if (text === template) {
            warnOnce(
              'Component template requires a root element, rather than just text.'
            );
          } else if ((text = text.trim())) {
            warnOnce(
              ("text \"" + text + "\" outside root element will be ignored.")
            );
          }
        }
        return
      }
      // IE textarea placeholder bug
      /* istanbul ignore if */
      if (isIE &&
          currentParent.tag === 'textarea' &&
          currentParent.attrsMap.placeholder === text) {
        return
      }
      var children = currentParent.children;
      text = inPre || text.trim()
        ? decodeHTMLCached(text)
        // only preserve whitespace if its not right after a starting tag
        : preserveWhitespace && children.length ? ' ' : '';
      if (text) {
        var expression;
        if (!inVPre && text !== ' ' && (expression = parseText(text, delimiters))) {
          children.push({
            type: 2,
            expression: expression,
            text: text
          });
        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
          children.push({
            type: 3,
            text: text
          });
        }
      }
    }
  });
  return root
}

function processPre (el) {
  if (getAndRemoveAttr(el, 'v-pre') != null) {
    el.pre = true;
  }
}

function processRef (el) {
  var ref = getBindingAttr(el, 'ref');
  if (ref) {
    el.ref = ref;
    el.refInFor = checkInFor(el);
  }
}

function addIfCondition (el, condition) {
  if (!el.ifConditions) {
    el.ifConditions = [];
  }
  el.ifConditions.push(condition);
}

function processOnce (el) {
  var once$$1 = getAndRemoveAttr(el, 'v-once');
  if (once$$1 != null) {
    el.once = true;
  }
}

function checkInFor (el) {
  var parent = el;
  while (parent) {
    if (parent.for !== undefined) {
      return true
    }
    parent = parent.parent;
  }
  return false
}

function parseModifiers (name) {
  var match = name.match(modifierRE);
  if (match) {
    var ret = {};
    match.forEach(function (m) { ret[m.slice(1)] = true; });
    return ret
  }
}

function isForbiddenTag (el) {
  return (
    el.tag === 'style' ||
    (el.tag === 'script' && (
      !el.attrsMap.type ||
      el.attrsMap.type === 'text/javascript'
    ))
  )
}

var ieNSBug = /^xmlns:NS\d+/;
var ieNSPrefix = /^NS\d+:/;

/* istanbul ignore next */
function guardIESVGBug (attrs) {
  var res = [];
  for (var i = 0; i < attrs.length; i++) {
    var attr = attrs[i];
    if (!ieNSBug.test(attr.name)) {
      attr.name = attr.name.replace(ieNSPrefix, '');
      res.push(attr);
    }
  }
  return res
}

/*  */

var isStaticKey;
var isPlatformReservedTag;

var genStaticKeysCached = cached(genStaticKeys$1);

/**
 * Goal of the optimizer: walk the generated template AST tree
 * and detect sub-trees that are purely static, i.e. parts of
 * the DOM that never needs to change.
 *
 * Once we detect these sub-trees, we can:
 *
 * 1. Hoist them into constants, so that we no longer need to
 *    create fresh nodes for them on each re-render;
 * 2. Completely skip them in the patching process.
 */
function optimize (root, options) {
  if (!root) { return }
  isStaticKey = genStaticKeysCached(options.staticKeys || '');
  isPlatformReservedTag = options.isReservedTag || no;
  // first pass: mark all non-static nodes.
  markStatic$1(root);
  // second pass: mark static roots.
  markStaticRoots(root, false);
}

function genStaticKeys$1 (keys) {
  return makeMap(
    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
    (keys ? ',' + keys : '')
  )
}

function walkThroughConditionsBlocks (conditionBlocks, isInFor) {
  for (var i = 1, len = conditionBlocks.length; i < len; i++) {
    markStaticRoots(conditionBlocks[i].block, isInFor);
  }
}

function isStatic (node) {
  if (node.type === 2) { // expression
    return false
  }
  if (node.type === 3) { // text
    return true
  }
  return !!(node.pre || (
    !node.hasBindings && // no dynamic bindings
    !node.if && !node.for && // not v-if or v-for or v-else
    !isBuiltInTag(node.tag) && // not a built-in
    isPlatformReservedTag(node.tag) && // not a component
    !isDirectChildOfTemplateFor(node) &&
    Object.keys(node).every(isStaticKey)
  ))
}

function isDirectChildOfTemplateFor (node) {
  while (node.parent) {
    node = node.parent;
    if (node.tag !== 'template') {
      return false
    }
    if (node.for) {
      return true
    }
  }
  return false
}

/*  */

var fnExpRE = /^\s*([\w$_]+|$[^)]*?$)\s*=>|^function\s*\(/;
var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;

// keyCode aliases
var keyCodes = {
  esc: 27,
  tab: 9,
  enter: 13,
  space: 32,
  up: 38,
  left: 37,
  right: 39,
  down: 40,
  'delete': [8, 46]
};

// #4868: modifiers that prevent the execution of the listener
// need to explicitly return null so that we can determine whether to remove
// the listener for .once
var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };

var modifierCode = {
  stop: '$event.stopPropagation();',
  prevent: '$event.preventDefault();',
  self: genGuard("$event.target !== $event.currentTarget"),
  ctrl: genGuard("!$event.ctrlKey"),
  shift: genGuard("!$event.shiftKey"),
  alt: genGuard("!$event.altKey"),
  meta: genGuard("!$event.metaKey"),
  left: genGuard("'button' in $event && $event.button !== 0"),
  middle: genGuard("'button' in $event && $event.button !== 1"),
  right: genGuard("'button' in $event && $event.button !== 2")
};

function genHandlers (events, native) {
  var res = native ? 'nativeOn:{' : 'on:{';
  for (var name in events) {
    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
  }
  return res.slice(0, -1) + '}'
}

function genHandler (
  name,
  handler
) {
  if (!handler) {
    return 'function(){}'
  }

if (Array.isArray(handler)) {
    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
  }

var isMethodPath = simplePathRE.test(handler.value);
  var isFunctionExpression = fnExpRE.test(handler.value);

if (!handler.modifiers) {
    return isMethodPath || isFunctionExpression
      ? handler.value
      : ("function($event){" + (handler.value) + "}") // inline statement
  } else {
    var code = '';
    var genModifierCode = '';
    var keys = [];
    for (var key in handler.modifiers) {
      if (modifierCode[key]) {
        genModifierCode += modifierCode[key];
        // left/right
        if (keyCodes[key]) {
          keys.push(key);
        }
      } else {
        keys.push(key);
      }
    }
    if (keys.length) {
      code += genKeyFilter(keys);
    }
    // Make sure modifiers like prevent and stop get executed after key filtering
    if (genModifierCode) {
      code += genModifierCode;
    }
    var handlerCode = isMethodPath
      ? handler.value + '($event)'
      : isFunctionExpression
        ? ("(" + (handler.value) + ")($event)")
        : handler.value;
    return ("function($event){" + code + handlerCode + "}")
  }
}

function genKeyFilter (keys) {
  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
}

function genFilterCode (key) {
  var keyVal = parseInt(key, 10);
  if (keyVal) {
    return ("$event.keyCode!==" + keyVal)
  }
  var alias = keyCodes[key];
  return ("_k($event.keyCode," + (JSON.stringify(key)) + (alias ? ',' + JSON.stringify(alias) : '') + ")")
}

/*  */

function bind$1 (el, dir) {
  el.wrapData = function (code) {
    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + (dir.modifiers && dir.modifiers.prop ? ',true' : '') + ")")
  };
}

/*  */

var baseDirectives = {
  bind: bind$1,
  cloak: noop
};

/*  */

// configurable state
var warn$3;
var transforms$1;
var dataGenFns;
var platformDirectives$1;
var isPlatformReservedTag$1;
var staticRenderFns;
var onceCount;
var currentOptions;

var children = el.inlineTemplate ? null : genChildren(el, true);
      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
    }
    // module transforms
    for (var i = 0; i < transforms$1.length; i++) {
      code = transforms$1[i](el, code);
    }
    return code
  }
}

// hoist static sub-trees out
function genStatic (el) {
  el.staticProcessed = true;
  staticRenderFns.push(("with(this){return " + (genElement(el)) + "}"));
  return ("_m(" + (staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
}

// v-once
function genOnce (el) {
  el.onceProcessed = true;
  if (el.if && !el.ifProcessed) {
    return genIf(el)
  } else if (el.staticInFor) {
    var key = '';
    var parent = el.parent;
    while (parent) {
      if (parent.for) {
        key = parent.key;
        break
      }
      parent = parent.parent;
    }
    if (!key) {
      "development" !== 'production' && warn$3(
        "v-once can only be used inside v-for that is keyed. "
      );
      return genElement(el)
    }
    return ("_o(" + (genElement(el)) + "," + (onceCount++) + (key ? ("," + key) : "") + ")")
  } else {
    return genStatic(el)
  }
}

function genIf (el) {
  el.ifProcessed = true; // avoid recursion
  return genIfConditions(el.ifConditions.slice())
}

function genIfConditions (conditions) {
  if (!conditions.length) {
    return '_e()'
  }

var condition = conditions.shift();
  if (condition.exp) {
    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions)))
  } else {
    return ("" + (genTernaryExp(condition.block)))
  }

// v-if with v-once should generate code like (a)?_m(0):_m(1)
  function genTernaryExp (el) {
    return el.once ? genOnce(el) : genElement(el)
  }
}

function genFor (el) {
  var exp = el.for;
  var alias = el.alias;
  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';

if (
    "development" !== 'production' &&
    maybeComponent(el) && el.tag !== 'slot' && el.tag !== 'template' && !el.key
  ) {
    warn$3(
      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
      "v-for should have explicit keys. " +
      "See https://vuejs.org/guide/list.html#key for more info.",
      true /* tip */
    );
  }

el.forProcessed = true; // avoid recursion
  return "_l((" + exp + ")," +
    "function(" + alias + iterator1 + iterator2 + "){" +
      "return " + (genElement(el)) +
    '})'
}

function genData (el) {
  var data = '{';

// directives first.
  // directives may mutate the el's other properties before they are generated.
  var dirs = genDirectives(el);
  if (dirs) { data += dirs + ','; }

// key
  if (el.key) {
    data += "key:" + (el.key) + ",";
  }
  // ref
  if (el.ref) {
    data += "ref:" + (el.ref) + ",";
  }
  if (el.refInFor) {
    data += "refInFor:true,";
  }
  // pre
  if (el.pre) {
    data += "pre:true,";
  }
  // record original tag name for components using "is" attribute
  if (el.component) {
    data += "tag:\"" + (el.tag) + "\",";
  }
  // module data generation functions
  for (var i = 0; i < dataGenFns.length; i++) {
    data += dataGenFns[i](el);
  }
  // attributes
  if (el.attrs) {
    data += "attrs:{" + (genProps(el.attrs)) + "},";
  }
  // DOM props
  if (el.props) {
    data += "domProps:{" + (genProps(el.props)) + "},";
  }
  // event handlers
  if (el.events) {
    data += (genHandlers(el.events)) + ",";
  }
  if (el.nativeEvents) {
    data += (genHandlers(el.nativeEvents, true)) + ",";
  }
  // slot target
  if (el.slotTarget) {
    data += "slot:" + (el.slotTarget) + ",";
  }
  // scoped slots
  if (el.scopedSlots) {
    data += (genScopedSlots(el.scopedSlots)) + ",";
  }
  // component v-model
  if (el.model) {
    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
  }
  // inline-template
  if (el.inlineTemplate) {
    var inlineTemplate = genInlineTemplate(el);
    if (inlineTemplate) {
      data += inlineTemplate + ",";
    }
  }
  data = data.replace(/,$/, '') + '}';
  // v-bind data wrap
  if (el.wrapData) {
    data = el.wrapData(data);
  }
  return data
}

function genScopedSlots (slots) {
  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) { return genScopedSlot(key, slots[key]); }).join(',')) + "])")
}

function genScopedSlot (key, el) {
  return "[" + key + ",function(" + (String(el.attrsMap.scope)) + "){" +
    "return " + (el.tag === 'template'
      ? genChildren(el) || 'void 0'
      : genElement(el)) + "}]"
}

// determine the normalization needed for the children array.
// 0: no normalization needed
// 1: simple normalization needed (possible 1-level deep nested array)
// 2: full normalization needed
function getNormalizationType (children) {
  var res = 0;
  for (var i = 0; i < children.length; i++) {
    var el = children[i];
    if (el.type !== 1) {
      continue
    }
    if (needsNormalization(el) ||
        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
      res = 2;
      break
    }
    if (maybeComponent(el) ||
        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
      res = 1;
    }
  }
  return res
}

function needsNormalization (el) {
  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
}

function maybeComponent (el) {
  return !isPlatformReservedTag$1(el.tag)
}

function genNode (node) {
  if (node.type === 1) {
    return genElement(node)
  } else {
    return genText(node)
  }
}

function genText (text) {
  return ("_v(" + (text.type === 2
    ? text.expression // no need for () because already wrapped in _s()
    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
}

// componentName is el.component, take it as argument to shun flow's pessimistic refinement
function genComponent (componentName, el) {
  var children = el.inlineTemplate ? null : genChildren(el, true);
  return ("_c(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
}

function genProps (props) {
  var res = '';
  for (var i = 0; i < props.length; i++) {
    var prop = props[i];
    res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
  }
  return res.slice(0, -1)
}

// #3895, #4268
function transformSpecialNewlines (text) {
  return text
    .replace(/\u2028/g, '\\u2028')
    .replace(/\u2029/g, '\\u2029')
}

/*  */

// these keywords should not appear inside expressions, but operators like
// typeof, instanceof and in are allowed
var prohibitedKeywordRE = new RegExp('\\b' + (
  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
  'super,throw,while,yield,delete,export,import,return,switch,default,' +
  'extends,finally,continue,debugger,function,arguments'
).split(',').join('\\b|\\b') + '\\b');

// these unary operators should not be used as property/method names
var unaryOperatorsRE = new RegExp('\\b' + (
  'delete,typeof,void'
).split(',').join('\\s*\$[^\$]*\\)|\\b') + '\\s*\$[^\$]*\\)');

// check valid identifier for v-for
var identRE = /[A-Za-z_$][\w$]*/;

// strip strings in expressions
var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;

// detect problematic expressions in a template
function detectErrors (ast) {
  var errors = [];
  if (ast) {
    checkNode(ast, errors);
  }
  return errors
}

function checkEvent (exp, text, errors) {
  var keywordMatch = exp.replace(stripStringRE, '').match(unaryOperatorsRE);
  if (keywordMatch) {
    errors.push(
      "avoid using JavaScript unary operator as property name: " +
      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
    );
  }
  checkExpression(exp, text, errors);
}

function checkFor (node, text, errors) {
  checkExpression(node.for || '', text, errors);
  checkIdentifier(node.alias, 'v-for alias', text, errors);
  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
}

function checkIdentifier (ident, type, text, errors) {
  if (typeof ident === 'string' && !identRE.test(ident)) {
    errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
  }
}

/*  */

function baseCompile (
  template,
  options
) {
  var ast = parse(template.trim(), options);
  optimize(ast, options);
  var code = generate(ast, options);
  return {
    ast: ast,
    render: code.render,
    staticRenderFns: code.staticRenderFns
  }
}

function makeFunction (code, errors) {
  try {
    return new Function(code)
  } catch (err) {
    errors.push({ err: err, code: code });
    return noop
  }
}

function createCompiler (baseOptions) {
  var functionCompileCache = Object.create(null);

function compile (
    template,
    options
  ) {
    var finalOptions = Object.create(baseOptions);
    var errors = [];
    var tips = [];
    finalOptions.warn = function (msg, tip$$1) {
      (tip$$1 ? tips : errors).push(msg);
    };

if (options) {
      // merge custom modules
      if (options.modules) {
        finalOptions.modules = (baseOptions.modules || []).concat(options.modules);
      }
      // merge custom directives
      if (options.directives) {
        finalOptions.directives = extend(
          Object.create(baseOptions.directives),
          options.directives
        );
      }
      // copy other options
      for (var key in options) {
        if (key !== 'modules' && key !== 'directives') {
          finalOptions[key] = options[key];
        }
      }
    }

var compiled = baseCompile(template, finalOptions);
    {
      errors.push.apply(errors, detectErrors(compiled.ast));
    }
    compiled.errors = errors;
    compiled.tips = tips;
    return compiled
  }

function compileToFunctions (
    template,
    options,
    vm
  ) {
    options = options || {};

/* istanbul ignore if */
    {
      // detect possible CSP restriction
      try {
        new Function('return 1');
      } catch (e) {
        if (e.toString().match(/unsafe-eval|CSP/)) {
          warn(
            'It seems you are using the standalone build of Vue.js in an ' +
            'environment with Content Security Policy that prohibits unsafe-eval. ' +
            'The template compiler cannot work in this environment. Consider ' +
            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
            'templates into render functions.'
          );
        }
      }
    }

// check cache
    var key = options.delimiters
      ? String(options.delimiters) + template
      : template;
    if (functionCompileCache[key]) {
      return functionCompileCache[key]
    }

// compile
    var compiled = compile(template, options);

// check compilation errors/tips
    {
      if (compiled.errors && compiled.errors.length) {
        warn(
          "Error compiling template:\n\n" + template + "\n\n" +
          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
          vm
        );
      }
      if (compiled.tips && compiled.tips.length) {
        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
      }
    }

// turn code into functions
    var res = {};
    var fnGenErrors = [];
    res.render = makeFunction(compiled.render, fnGenErrors);
    var l = compiled.staticRenderFns.length;
    res.staticRenderFns = new Array(l);
    for (var i = 0; i < l; i++) {
      res.staticRenderFns[i] = makeFunction(compiled.staticRenderFns[i], fnGenErrors);
    }

// check function generation errors.
    // this should only happen if there is a bug in the compiler itself.
    // mostly for codegen development use
    /* istanbul ignore if */
    {
      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
        warn(
          "Failed to generate render function:\n\n" +
          fnGenErrors.map(function (ref) {
            var err = ref.err;
            var code = ref.code;

return ((err.toString()) + " in\n\n" + code + "\n");
        }).join('\n'),
          vm
        );
      }
    }

return (functionCompileCache[key] = res)
  }

return {
    compile: compile,
    compileToFunctions: compileToFunctions
  }
}

/*  */

var klass$1 = {
  staticKeys: ['staticClass'],
  transformNode: transformNode,
  genData: genData$1
};

/*  */

var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
  if (styleBinding) {
    el.styleBinding = styleBinding;
  }
}

var style$1 = {
  staticKeys: ['staticStyle'],
  transformNode: transformNode$1,
  genData: genData$2
};

var modules$1 = [
  klass$1,
  style$1
];

/*  */

function text (el, dir) {
  if (dir.value) {
    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
  }
}

/*  */

function html (el, dir) {
  if (dir.value) {
    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
  }
}

var directives$1 = {
  model: model,
  text: text,
  html: html
};

/*  */

var baseOptions = {
  expectHTML: true,
  modules: modules$1,
  directives: directives$1,
  isPreTag: isPreTag,
  isUnaryTag: isUnaryTag,
  mustUseProp: mustUseProp,
  isReservedTag: isReservedTag,
  getTagNamespace: getTagNamespace,
  staticKeys: genStaticKeys(modules$1)
};

var ref$1 = createCompiler(baseOptions);
var compileToFunctions = ref$1.compileToFunctions;

/*  */

var idToTemplate = cached(function (id) {
  var el = query(id);
  return el && el.innerHTML
});

var mount = Vue$3.prototype.$mount;
Vue$3.prototype.$mount = function (
  el,
  hydrating
) {
  el = el && query(el);

/* istanbul ignore if */
  if (el === document.body || el === document.documentElement) {
    "development" !== 'production' && warn(
      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
    );
    return this
  }

var ref = compileToFunctions(template, {
        shouldDecodeNewlines: shouldDecodeNewlines,
        delimiters: options.delimiters
      }, this);
      var render = ref.render;
      var staticRenderFns = ref.staticRenderFns;
      options.render = render;
      options.staticRenderFns = staticRenderFns;

/* istanbul ignore if */
      if ("development" !== 'production' && config.performance && mark) {
        mark('compile end');
        measure(((this._name) + " compile"), 'compile', 'compile end');
      }
    }
  }
  return mount.call(this, el, hydrating)
};

/**
 * Get outerHTML of elements, taking care
 * of SVG elements in IE as well.
 */
function getOuterHTML (el) {
  if (el.outerHTML) {
    return el.outerHTML
  } else {
    var container = document.createElement('div');
    container.appendChild(el.cloneNode(true));
    return container.innerHTML
  }
}

Vue$3.compile = compileToFunctions;

return Vue$3;

})));

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