vue3源码

/*!

Vue.js v2.6.14
© 2014-2021 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 = global || self, global.Vue = factory());
}(this, function () { ‘use strict’;

/* */

var emptyObject = Object.freeze({});

// These helpers produce better VM code in JS engines due to their
// explicitness and function inlining.
function isUndef (v) {
return v === undefined || v === null
}

function isDef (v) {
return v !== undefined && v !== null
}

function isTrue (v) {
return v === true
}

function isFalse (v) {
return v === false
}

/**

Check if value is primitive.
*/
function isPrimitive (value) {
return (
typeof value === ‘string’ ||
typeof value === ‘number’ ||
// $flow-disable-line
typeof value === ‘symbol’ ||
typeof value === ‘boolean’
)
}

/**

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

/**

Get the raw type string of a value, e.g., [object Object].
*/
var _toString = Object.prototype.toString;

function toRawType (value) {
return _toString.call(value).slice(8, -1)
}

/**

Strict object type check. Only returns true
for plain JavaScript objects.
*/
function isPlainObject (obj) {
return _toString.call(obj) === ‘[object Object]’
}

function isRegExp (v) {
return _toString.call(v) === ‘[object RegExp]’
}

/**

Check if val is a valid array index.
*/
function isValidArrayIndex (val) {
var n = parseFloat(String(val));
return n >= 0 && Math.floor(n) === n && isFinite(val)
}

function isPromise (val) {
return (
isDef(val) &&
typeof val.then === ‘function’ &&
typeof val.catch === ‘function’
)
}

/**

Convert a value to a string that is actually rendered.
*/
function toString (val) {
return val == null
? ‘’
: Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
? JSON.stringify(val, null, 2)
: String(val)
}

/**

Convert an input value to a number for persistence.
If the conversion fails, return original string.
*/
function toNumber (val) {
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);

/**

Check if an attribute is a reserved attribute.
*/
var isReservedAttribute = makeMap(‘key,ref,slot,slot-scope,is’);

/**

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

/**

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 = /\B([A-Z])/g;
var hyphenate = cached(function (str) {
return str.replace(hyphenateRE, ‘-$1’).toLowerCase()
});

/**

Simple bind polyfill for environments that do not support it,
e.g., PhantomJS 1.x. Technically, we don’t need this anymore
since native bind is now performant enough in most browsers.
But removing it would mean breaking code that was able to run in
PhantomJS 1.x, so this must be kept for backward compatibility.
*/

/* istanbul ignore next */
function polyfillBind (fn, ctx) {
function boundFn (a) {
var l = arguments.length;
return l
? l > 1
? fn.apply(ctx, arguments)
: fn.call(ctx, a)
: fn.call(ctx)
}

boundFn._length = fn.length;
return boundFn

}

function nativeBind (fn, ctx) {
return fn.bind(ctx)
}

var bind = Function.prototype.bind
? nativeBind
: polyfillBind;

/**

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
}

/**

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
}

/* eslint-disable no-unused-vars */

/**

Perform no operation.
Stubbing args to make Flow happy without leaving useless transpiled code
with …rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
*/
function noop (a, b, c) {}

/**

Always return false.
*/
var no = function (a, b, c) { return false; };

/* eslint-enable no-unused-vars */

/**

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

/**

Generate a string containing static keys 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) {
if (a === b) { return true }
var isObjectA = isObject(a);
var isObjectB = isObject(b);
if (isObjectA && isObjectB) {
try {
var isArrayA = Array.isArray(a);
var isArrayB = Array.isArray(b);
if (isArrayA && isArrayB) {
return a.length === b.length && a.every(function (e, i) {
return looseEqual(e, b[i])
})
} else if (a instanceof Date && b instanceof Date) {
return a.getTime() === b.getTime()
} else if (!isArrayA && !isArrayB) {
var keysA = Object.keys(a);
var keysB = Object.keys(b);
return keysA.length === keysB.length && keysA.every(function (key) {
return looseEqual(a[key], b[key])
})
} else {
/ istanbul ignore next /
return false
}
} catch (e) {
/ istanbul ignore next */
return false
}
} else if (!isObjectA && !isObjectB) {
return String(a) === String(b)
} else {
return false
}
}

/**

Return the first index at which a loosely equal value can be
found in the array (if value is a plain object, the array must
contain an object of the same shape), or -1 if it is not present.
*/
function looseIndexOf (arr, val) {
for (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.apply(this, arguments);
}
}
}

var SSR_ATTR = ‘data-server-rendered’;

var ASSET_TYPES = [
‘component’,
‘directive’,
‘filter’
];

var LIFECYCLE_HOOKS = [
‘beforeCreate’,
‘created’,
‘beforeMount’,
‘mounted’,
‘beforeUpdate’,
‘updated’,
‘beforeDestroy’,
‘destroyed’,
‘activated’,
‘deactivated’,
‘errorCaptured’,
‘serverPrefetch’
];

/* */

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

/*** Whether to suppress warnings.*/
silent: false,/*** Show production mode tip message on boot?*/
productionTip: "development" !== 'production',/*** Whether to enable devtools*/
devtools: "development" !== 'production',/*** Whether to record perf*/
performance: false,/*** Error handler for watcher errors*/
errorHandler: null,/*** Warn handler for watcher warns*/
warnHandler: null,/*** Ignore certain custom elements*/
ignoredElements: [],/*** Custom user key aliases for v-on*/
// $flow-disable-line
keyCodes: Object.create(null),/*** Check if a tag is reserved so that it cannot be registered as a* component. This is platform-dependent and may be overwritten.*/
isReservedTag: no,/*** Check if an attribute is reserved so that it cannot be used as a component* prop. This is platform-dependent and may be overwritten.*/
isReservedAttr: no,/*** Check if a tag is an unknown element.* Platform-dependent.*/
isUnknownElement: no,/*** Get the namespace of an element*/
getTagNamespace: noop,/*** Parse the real tag name for the specific platform.*/
parsePlatformTagName: identity,/*** Check if an attribute must be bound using property, e.g. value* Platform-dependent.*/
mustUseProp: no,/*** Perform updates asynchronously. Intended to be used by Vue Test Utils* This will significantly reduce performance if set to false.*/
async: true,/*** Exposed for legacy reasons*/
_lifecycleHooks: LIFECYCLE_HOOKS

});

/* */

/**

unicode letters used for parsing html tags, component names and property paths.
using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
skipping \u10000-\uEFFFF due to it freezing up PhantomJS
*/
var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;

/**

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 = new RegExp((“[^” + (unicodeRegExp.source) + “.$_\d]”));
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
}
}

/* */

// can we use proto?
var hasProto = ‘proto’ in {};

// Browser environment sniffing
var inBrowser = typeof window !== ‘undefined’;
var inWeex = typeof WXEnvironment !== ‘undefined’ && !!WXEnvironment.platform;
var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
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) || (weexPlatform === ‘android’);
var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === ‘ios’);
var isChrome = UA && /chrome/\d+/.test(UA) && !isEdge;
var isPhantomJS = UA && /phantomjs/.test(UA);
var isFF = UA && UA.match(/firefox/(\d+)/);

// Firefox has a “watch” function on Object.prototype…
var nativeWatch = ({}).watch;

// 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 && !inWeex && typeof global !== ‘undefined’) {
// detect presence of vue-server-renderer and avoid
// Webpack shimming the process
_isServer = global[‘process’] && global[‘process’].env.VUE_ENV === ‘server’;
} else {
_isServer = false;
}
}
return _isServer
};

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

/* istanbul ignore next */
function isNative (Ctor) {
return typeof Ctor === ‘function’ && /native code/.test(Ctor.toString())
}

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

var _Set;
/* istanbul ignore if / // $flow-disable-line
if (typeof Set !== ‘undefined’ && isNative(Set)) {
// use native Set when available.
_Set = Set;
} else {
// a non-standard Set polyfill that only works with primitive keys.
_Set = /@PURE*/(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 generateComponentTrace = (noop); // work around flow check
var formatComponentName = (noop);

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

warn = function (msg, vm) {var trace = vm ? generateComponentTrace(vm) : '';if (config.warnHandler) {config.warnHandler.call(null, msg, vm, trace);} else if (hasConsole && (!config.silent)) {console.error(("[Vue warn]: " + msg + trace));}
};tip = function (msg, vm) {if (hasConsole && (!config.silent)) {console.warn("[Vue tip]: " + msg + (vm ? generateComponentTrace(vm) : ''));}
};formatComponentName = function (vm, includeFile) {if (vm.$root === vm) {return '<Root>'}var options = typeof vm === 'function' && vm.cid != null? vm.options: vm._isVue? vm.$options || vm.constructor.options: vm;var name = options.name || options._componentTag;var file = options.__file;if (!name && file) {var match = file.match(/([^/\\]+)\.vue$/);name = match && match[1];}return ((name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +(file && includeFile !== false ? (" at " + file) : ''))
};var repeat = function (str, n) {var res = '';while (n) {if (n % 2 === 1) { res += str; }if (n > 1) { str += str; }n >>= 1;}return res
};generateComponentTrace = function (vm) {if (vm._isVue && vm.$parent) {var tree = [];var currentRecursiveSequence = 0;while (vm) {if (tree.length > 0) {var last = tree[tree.length - 1];if (last.constructor === vm.constructor) {currentRecursiveSequence++;vm = vm.$parent;continue} else if (currentRecursiveSequence > 0) {tree[tree.length - 1] = [last, currentRecursiveSequence];currentRecursiveSequence = 0;}}tree.push(vm);vm = vm.$parent;}return '\n\nfound in\n\n' + tree.map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)"): formatComponentName(vm))); }).join('\n')} else {return ("\n\n(found in " + (formatComponentName(vm)) + ")")}
};

}

/* */

var uid = 0;

/**

A dep is an observable that can have multiple
directives subscribing to it.
*/
var Dep = function Dep () {
this.id = uid++;
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();
if (!config.async) {
// subs aren’t sorted in scheduler if not running async
// we need to sort them now to make sure they fire in correct
// order
subs.sort(function (a, b) { return a.id - b.id; });
}
for (var i = 0, l = subs.length; i < l; i++) {
subs[i].update();
}
};

// The current target watcher being evaluated.
// This is globally unique because only one watcher
// can be evaluated at a time.
Dep.target = null;
var targetStack = [];

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

function popTarget () {
targetStack.pop();
Dep.target = targetStack[targetStack.length - 1];
}

/* */

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

var prototypeAccessors = { child: { configurable: true } };

// 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 (text) {
if ( text === void 0 ) text = ‘’;

var node = new VNode();
node.text = text;
node.isComment = true;
return node

};

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

// optimized shallow clone
// used for static nodes and slot nodes because they may be reused across
// multiple renders, cloning them avoids errors when DOM manipulations rely
// on their elm reference.
function cloneVNode (vnode) {
var cloned = new VNode(
vnode.tag,
vnode.data,
// #7975
// clone children array to avoid mutating original in case of cloning
// a child.
vnode.children && vnode.children.slice(),
vnode.text,
vnode.elm,
vnode.context,
vnode.componentOptions,
vnode.asyncFactory
);
cloned.ns = vnode.ns;
cloned.isStatic = vnode.isStatic;
cloned.key = vnode.key;
cloned.isComment = vnode.isComment;
cloned.fnContext = vnode.fnContext;
cloned.fnOptions = vnode.fnOptions;
cloned.fnScopeId = vnode.fnScopeId;
cloned.asyncMeta = vnode.asyncMeta;
cloned.isCloned = true;
return cloned
}

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

var arrayProto = Array.prototype;
var arrayMethods = Object.create(arrayProto);

var methodsToPatch = [
‘push’,
‘pop’,
‘shift’,
‘unshift’,
‘splice’,
‘sort’,
‘reverse’
];

/**

Intercept mutating methods and emit events
*/
methodsToPatch.forEach(function (method) {
// cache original method
var original = arrayProto[method];
def(arrayMethods, method, function mutator () {
var args = [], len = arguments.length;
while ( len-- ) args[ len ] = arguments[ len ];

var result = original.apply(this, args);
var ob = this.ob;
var inserted;
switch (method) {
case ‘push’:
case ‘unshift’:
inserted = args;
break
case ‘splice’:
inserted = args.slice(2);
break
}
if (inserted) { ob.observeArray(inserted); }
// notify change
ob.dep.notify();
return result
});
});

/* */

var arrayKeys = Object.getOwnPropertyNames(arrayMethods);

/**

In some cases we may want to disable observation inside a component’s
update computation.
*/
var shouldObserve = true;

function toggleObserving (value) {
shouldObserve = value;
}

/**

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

/**

Walk through all properties and convert them into
getter/setters. This method should only be called when
value type is Object.
*/
Observer.prototype.walk = function walk (obj) {
var keys = Object.keys(obj);
for (var i = 0; i < keys.length; i++) {
defineReactive$$1(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 a target Object or Array by intercepting
the prototype chain using proto
/
function protoAugment (target, src) {
/ eslint-disable no-proto /
target.proto = src;
/ eslint-enable no-proto */
}

/**

Augment a target Object or Array by defining
hidden properties.
/
/ istanbul ignore next */
function copyAugment (target, src, keys) {
for (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) || value instanceof VNode) {
return
}
var ob;
if (hasOwn(value, ‘ob’) && value.ob instanceof Observer) {
ob = value.ob;
} else if (
shouldObserve &&
!isServerRendering() &&
(Array.isArray(value) || isPlainObject(value)) &&
Object.isExtensible(value) &&
!value._isVue
) {
ob = new Observer(value);
}
if (asRootData && ob) {
ob.vmCount++;
}
return ob
}

/**

Define a reactive property on an Object.
*/
function defineReactive$$1 (
obj,
key,
val,
customSetter,
shallow
) {
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;
if ((!getter || setter) && arguments.length === 2) {val = obj[key];
}var childOb = !shallow && observe(val);
Object.defineProperty(obj, key, {enumerable: true,configurable: true,get: function reactiveGetter () {var value = getter ? getter.call(obj) : val;if (Dep.target) {dep.depend();if (childOb) {childOb.dep.depend();if (Array.isArray(value)) {dependArray(value);}}}return value},set: function reactiveSetter (newVal) {var value = getter ? getter.call(obj) : val;/* eslint-disable no-self-compare */if (newVal === value || (newVal !== newVal && value !== value)) {return}/* eslint-enable no-self-compare */if (customSetter) {customSetter();}// #7981: for accessor properties without setterif (getter && !setter) { return }if (setter) {setter.call(obj, newVal);} else {val = newVal;}childOb = !shallow && observe(newVal);dep.notify();}
});

}

/**

Set a property on an object. Adds the new property and
triggers change notification if the property doesn’t
already exist.
*/
function set (target, key, val) {
if (isUndef(target) || isPrimitive(target)
) {
warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
}
if (Array.isArray(target) && isValidArrayIndex(key)) {
target.length = Math.max(target.length, key);
target.splice(key, 1, val);
return val
}
if (key in target && !(key in Object.prototype)) {
target[key] = val;
return val
}
var ob = (target).ob;
if (target._isVue || (ob && ob.vmCount)) {
warn(
'Avoid adding reactive properties to a Vue instance or its root $KaTeX parse error: Expected 'EOF', got '}' at position 83: \dots); return val }̲ if (!ob) { ta\dots$ $1(ob.value, key, val);
ob.dep.notify();
return val
}

/**

Delete a property and trigger change if necessary.
*/
function del (target, key) {
if (isUndef(target) || isPrimitive(target)
) {
warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
}
if (Array.isArray(target) && isValidArrayIndex(key)) {
target.splice(key, 1);
return
}
var ob = (target).ob;
if (target._isVue || (ob && ob.vmCount)) {
warn(
'Avoid deleting properties on a Vue instance or its root $data ’ +
‘- just set it to null.’
);
return
}
if (!hasOwn(target, key)) {
return
}
delete target[key];
if (!ob) {
return
}
ob.dep.notify();
}

/**

Collect dependencies on array elements when the array is touched, since
we cannot intercept array element access like property getters.
*/
function dependArray (value) {
for (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 = hasSymbol? Reflect.ownKeys(from): Object.keys(from);for (var i = 0; i < keys.length; i++) {key = keys[i];// in case the object is already observed...if (key === '__ob__') { continue }toVal = to[key];fromVal = from[key];if (!hasOwn(to, key)) {set(to, key, fromVal);} else if (toVal !== fromVal &&isPlainObject(toVal) &&isPlainObject(fromVal)) {mergeData(toVal, fromVal);}
}
return to

}

/**

Data
*/
function mergeDataOrFn (
parentVal,
childVal,
vm
) {
if (!vm) {
// in a Vue.extend merge, both should be functions
if (!childVal) {
return parentVal
}
if (!parentVal) {
return childVal
}
// when parentVal & childVal are both present,
// we need to return a function that returns the
// merged result of both functions… no need to
// check if parentVal is a function here because
// it has to be a function to pass previous merges.
return function mergedDataFn () {
return mergeData(
typeof childVal === ‘function’ ? childVal.call(this, this) : childVal,
typeof parentVal === ‘function’ ? parentVal.call(this, this) : parentVal
)
}
} else {
return function mergedInstanceDataFn () {
// instance merge
var instanceData = typeof childVal === ‘function’
? childVal.call(vm, vm)
: childVal;
var defaultData = typeof parentVal === ‘function’
? parentVal.call(vm, vm)
: parentVal;
if (instanceData) {
return mergeData(instanceData, defaultData)
} else {
return defaultData
}
}
}
}

strats.data = function (
parentVal,
childVal,
vm
) {
if (!vm) {
if (childVal && typeof childVal !== ‘function’) {
warn(
'The “data” option should be a function ’ +
'that returns a per-instance value in component ’ +
‘definitions.’,
vm
);

    return parentVal}return mergeDataOrFn(parentVal, childVal)
}return mergeDataOrFn(parentVal, childVal, vm)

};

/**

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

function dedupeHooks (hooks) {
var res = [];
for (var i = 0; i < hooks.length; i++) {
if (res.indexOf(hooks[i]) === -1) {
res.push(hooks[i]);
}
}
return res
}

LIFECYCLE_HOOKS.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,
vm,
key
) {
var res = Object.create(parentVal || null);
if (childVal) {
assertObjectType(key, childVal, vm);
return extend(res, childVal)
} else {
return res
}
}

ASSET_TYPES.forEach(function (type) {
strats[type + ‘s’] = mergeAssets;
});

/**

Watchers.
Watchers hashes should not overwrite one
another, so we merge them as arrays.
/
strats.watch = function (
parentVal,
childVal,
vm,
key
) {
// work around Firefox’s Object.prototype.watch…
if (parentVal === nativeWatch) { parentVal = undefined; }
if (childVal === nativeWatch) { childVal = undefined; }
/ istanbul ignore if */
if (!childVal) { return Object.create(parentVal || null) }
{
assertObjectType(key, childVal, vm);
}
if (!parentVal) { return childVal }
var ret = {};
extend(ret, parentVal);
for (var key$1 in childVal) {
var parent = ret[key$1];
var child = childVal[key$1];
if (parent && !Array.isArray(parent)) {
parent = [parent];
}
ret[key$1] = parent
? parent.concat(child)
: Array.isArray(child) ? child : [child];
}
return ret
};

/**

Other object hashes.
*/
strats.props =
strats.methods =
strats.inject =
strats.computed = function (
parentVal,
childVal,
vm,
key
) {
if (childVal && “development” !== ‘production’) {
assertObjectType(key, childVal, vm);
}
if (!parentVal) { return childVal }
var ret = Object.create(null);
extend(ret, parentVal);
if (childVal) { extend(ret, childVal); }
return ret
};
strats.provide = mergeDataOrFn;

/**

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

/**

Validate component names
*/
function checkComponents (options) {
for (var key in options.components) {
validateComponentName(key);
}
}

function validateComponentName (name) {
if (!new RegExp((“¹[\-\.0-9_” + (unicodeRegExp.source) + “]*$”)).test(name)) {
warn(
‘Invalid component name: "’ + name + '". Component names ’ +
‘should conform to valid custom element name in html5 specification.’
);
}
if (isBuiltInTag(name) || config.isReservedTag(name)) {
warn(
'Do not use built-in or reserved HTML elements as component ’ +
'id: ’ + name
);
}
}

/**

Ensure all props option syntax are normalized into the
Object-based format.
*/
function normalizeProps (options, vm) {
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 };
}
} else {
warn(
"Invalid value for option “props”: expected an Array or an Object, " +
"but got " + (toRawType(props)) + “.”,
vm
);
}
options.props = res;
}

/**

Normalize all injections into Object-based format
*/
function normalizeInject (options, vm) {
var inject = options.inject;
if (!inject) { return }
var normalized = options.inject = {};
if (Array.isArray(inject)) {
for (var i = 0; i < inject.length; i++) {
normalized[inject[i]] = { from: inject[i] };
}
} else if (isPlainObject(inject)) {
for (var key in inject) {
var val = inject[key];
normalized[key] = isPlainObject(val)
? extend({ from: key }, val)
: { from: val };
}
} else {
warn(
"Invalid value for option “inject”: expected an Array or an Object, " +
"but got " + (toRawType(inject)) + “.”,
vm
);
}
}

/**

Normalize raw function directives into object format.
*/
function normalizeDirectives (options) {
var dirs = options.directives;
if (dirs) {
for (var key in dirs) {
var def $1 = d i rs [k ey]; i f (t y p eo fd e f$ 1 === ‘function’) {
dirs[key] = { bind: def $1, u p d a t e : d e f$ 1 };
}
}
}
}

function assertObjectType (name, value, vm) {
if (!isPlainObject(value)) {
warn(
"Invalid value for option “” + name + “”: expected an Object, " +
"but got " + (toRawType(value)) + “.”,
vm
);
}
}

/**

Merge two option objects into a new one.
Core utility used in both instantiation and inheritance.
*/
function mergeOptions (
parent,
child,
vm
) {
{
checkComponents(child);
}

if (typeof child === 'function') {child = child.options;
}normalizeProps(child, vm);
normalizeInject(child, vm);
normalizeDirectives(child);// Apply extends and mixins on the child options,
// but only if it is a raw options object that isn't
// the result of another mergeOptions call.
// Only merged options has the _base property.
if (!child._base) {if (child.extends) {parent = mergeOptions(parent, child.extends, vm);}if (child.mixins) {for (var i = 0, l = child.mixins.length; i < l; i++) {parent = mergeOptions(parent, child.mixins[i], 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 (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 (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. $KaTeX parse error: Expected 'EOF', got '&' at position 19: \dotsions.propsData &̲& vm.$ 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], vm);
expectedTypes.push(assertedType.expectedType || ‘’);
valid = assertedType.valid;
}
}

var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
if (!valid && haveExpectedTypes) {warn(getInvalidTypeMessage(name, value, expectedTypes),vm);return
}
var validator = prop.validator;
if (validator) {if (!validator(value)) {warn('Invalid prop: custom validator check failed for prop "' + name + '".',vm);}
}

}

var functionTypeCheckRE = /^\s*function (\w+)/;

/**

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(functionTypeCheckRE);
return match ? match[1] : ‘’
}

function isSameType (a, b) {
return getType(a) === getType(b)
}

function getTypeIndex (type, expectedTypes) {
if (!Array.isArray(expectedTypes)) {
return isSameType(expectedTypes, type) ? 0 : -1
}
for (var i = 0, len = expectedTypes.length; i < len; i++) {
if (isSameType(expectedTypes[i], type)) {
return i
}
}
return -1
}

function styleValue (value, type) {
if (type === ‘String’) {
return (“”" + value + “”“)
} else if (type === ‘Number’) {
return (”" + (Number(value)))
} else {
return (“” + value)
}
}

var EXPLICABLE_TYPES = [‘string’, ‘number’, ‘boolean’];
function isExplicable (value) {
return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
}

function isBoolean () {
var args = [], len = arguments.length;
while ( len-- ) args[ len ] = arguments[ len ];

return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })

}

/* */

function globalHandleError (err, vm, info) {
if (config.errorHandler) {
try {
return config.errorHandler.call(null, err, vm, info)
} catch (e) {
// if the user intentionally throws the original error in the handler,
// do not log it twice
if (e !== err) {
logError(e, null, ‘config.errorHandler’);
}
}
}
logError(err, vm, info);
}

function logError (err, vm, info) {
{
warn(("Error in " + info + “: “” + (err.toString()) + “””), vm);
}
/* istanbul ignore else */
if ((inBrowser || inWeex) && typeof console !== ‘undefined’) {
console.error(err);
} else {
throw err
}
}

/* */

var isUsingMicroTask = false;

var callbacks = [];
var pending = false;

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

// Here we have async deferring wrappers using microtasks.
// In 2.5 we used (macro) tasks (in combination with microtasks).
// However, it has subtle problems when state is changed right before repaint
// (e.g. #6813, out-in transitions).
// Also, using (macro) tasks in event handler would cause some weird behaviors
// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
// So we now use microtasks everywhere, again.
// A major drawback of this tradeoff is that there are some scenarios
// where microtasks have too high a priority and fire in between supposedly
// sequential events (e.g. #4521, #6690, which have workarounds)
// or even between bubbling of the same event (#6566).
var timerFunc;

// The nextTick behavior leverages the microtask queue, which can be accessed
// via either native Promise.then or MutationObserver.
// MutationObserver has wider support, however it is seriously bugged in
// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
// completely stops working after triggering a few times… so, if native
// Promise is available, we will use it:
/* istanbul ignore next, $flow-disable-line */
if (typeof Promise !== ‘undefined’ && isNative(Promise)) {
var p = Promise.resolve();
timerFunc = function () {
p.then(flushCallbacks);
// In problematic UIWebViews, Promise.then doesn’t completely break, but
// it can get stuck in a weird state where callbacks are pushed into the
// microtask queue but the queue isn’t being flushed, until the browser
// needs to do some other work, e.g. handle a timer. Therefore we can
// “force” the microtask queue to be flushed by adding an empty timer.
if (isIOS) { setTimeout(noop); }
};
isUsingMicroTask = true;
} else if (!isIE && typeof MutationObserver !== ‘undefined’ && (
isNative(MutationObserver) ||
// PhantomJS and iOS 7.x
MutationObserver.toString() === ‘[object MutationObserverConstructor]’
)) {
// Use MutationObserver where native Promise is not available,
// e.g. PhantomJS, iOS7, Android 4.4
// (#6466 MutationObserver is unreliable in IE11)
var counter = 1;
var observer = new MutationObserver(flushCallbacks);
var textNode = document.createTextNode(String(counter));
observer.observe(textNode, {
characterData: true
});
timerFunc = function () {
counter = (counter + 1) % 2;
textNode.data = String(counter);
};
isUsingMicroTask = true;
} else if (typeof setImmediate !== ‘undefined’ && isNative(setImmediate)) {
// Fallback to setImmediate.
// Technically it leverages the (macro) task queue,
// but it is still a better choice than setTimeout.
timerFunc = function () {
setImmediate(flushCallbacks);
};
} else {
// Fallback to setTimeout.
timerFunc = function () {
setTimeout(flushCallbacks, 0);
};
}

/* */

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)
};
}
}

/* 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,BigInt,’ +
‘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 that this property is reactive, ' +'either in the data option, or for class-based components, by ' +'initializing the property. ' +'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',target);
};var warnReservedPrefix = function (target, key) {warn("Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +'properties starting with "$" or "_" are not proxied in the Vue instance to ' +'prevent conflicts with Vue internals. ' +'See: https://vuejs.org/v2/api/#data',target);
};var hasProxy =typeof Proxy !== 'undefined' && isNative(Proxy);if (hasProxy) {var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');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 hasHandler = {has: function has (target, key) {var has = key in target;var isAllowed = allowedGlobals(key) ||(typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));if (!has && !isAllowed) {if (key in target.$data) { warnReservedPrefix(target, key); }else { warnNonPresent(target, key); }}return has || !isAllowed}
};var getHandler = {get: function get (target, key) {if (typeof key === 'string' && !(key in target)) {if (key in target.$data) { warnReservedPrefix(target, key); }else { warnNonPresent(target, key); }}return target[key]}
};initProxy = function initProxy (vm) {if (hasProxy) {// determine which proxy handler to usevar options = vm.$options;var handlers = options.render && options.render._withStripped? getHandler: hasHandler;vm._renderProxy = new Proxy(vm, handlers);} else {vm._renderProxy = vm;}
};

}

/* */

var seenObjects = new _Set();

/**

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

/* */

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

  var fns = invoker.fns;if (Array.isArray(fns)) {var cloned = fns.slice();for (var i = 0; i < cloned.length; i++) {invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");}} else {// return handler return value for single handlersreturn invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")}
}
invoker.fns = fns;
return invoker

}

function updateListeners (
on,
oldOn,
add,
remove $KaTeX parse error: Expected '}', got 'EOF' at end of input: \dots var name, def$ 1, cur, old, event;
for (name in on) {
def $KaTeX parse error: Expected 'EOF', got '}' at position 645: \dotsd; } }̲ for (name \dots$ 1(event.name, oldOn[name], event.capture);
}
}
}

/* */

function mergeVNodeHook (def, hookKey, hook) {
if (def instanceof VNode) {
def = def.data.hook || (def.data.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 leakremove(invoker.fns, wrappedHook);
}if (isUndef(oldHook)) {// no existing hookinvoker = createFnInvoker([wrappedHook]);
} else {/* istanbul ignore if */if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {// already a merged invokerinvoker = oldHook;invoker.fns.push(wrappedHook);} else {// existing plain hookinvoker = 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. 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. , , v-for, or when the children is provided by user
// with hand-written render functions / JSX. In such cases a full normalization
// is needed to cater to all possible types of children values.
function normalizeChildren (children) {
return isPrimitive(children)
? [createTextVNode(children)]
: Array.isArray(children)
? normalizeArrayChildren(children)
: undefined
}

function isTextNode (node) {
return isDef(node) && isDef(node.text) && isFalse(node.isComment)
}

/* */

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

function initInjections (vm) {
var result = resolveInject(vm. $KaTeX parse error: Expected '}', got 'EOF' at end of input: \dots defineReactive$ $1(vm, key, result[key], function () {
warn(
"Avoid mutating an injected value directly since the changes will be " +
"overwritten whenever the provided component re-renders. " +
“injection being mutated: “” + key + “””,
vm
);
});
}
});
toggleObserving(true);
}
}

function resolveInject (inject, vm) {
if (inject) {
// inject is :any because flow is not smart enough to figure out cached
var result = Object.create(null);
var keys = hasSymbol
? Reflect.ownKeys(inject)
: Object.keys(inject);

  for (var i = 0; i < keys.length; i++) {var key = keys[i];// #6574 in case the inject object is observed...if (key === '__ob__') { continue }var provideKey = inject[key].from;var source = vm;while (source) {if (source._provided && hasOwn(source._provided, provideKey)) {result[key] = source._provided[provideKey];break}source = source.$parent;}if (!source) {if ('default' in inject[key]) {var provideDefault = inject[key].default;result[key] = typeof provideDefault === 'function'? provideDefault.call(vm): provideDefault;} else {warn(("Injection \"" + key + "\" not found"), vm);}}}return result
}

}

/* */

/**

Runtime helper for resolving raw children VNodes into a slot object.
*/
function resolveSlots (
children,
context
) {
if (!children || !children.length) {
return {}
}
var slots = {};
for (var i = 0, l = children.length; i < l; i++) {
var child = children[i];
var data = child.data;
// remove slot attribute if the node is resolved as a Vue slot node
if (data && data.attrs && data.attrs.slot) {
delete data.attrs.slot;
}
// named slots should only be respected if the vnode was rendered in the
// same context.
if ((child.context === context || child.fnContext === context) &&
data && data.slot != null
) {
var name = data.slot;
var slot = (slots[name] || (slots[name] = []));
if (child.tag === ‘template’) {
slot.push.apply(slot, child.children || []);
} else {
slot.push(child);
}
} else {
(slots.default || (slots.default = [])).push(child);
}
}
// ignore slots that contains only whitespace
for (var name$1 in slots) {
if (slots[name$1].every(isWhitespace)) {
delete slots[name$1];
}
}
return slots
}

function isWhitespace (node) {
return (node.isComment && !node.asyncFactory) || node.text === ’ ’
}

/* */

function isAsyncPlaceholder (node) {
return node.isComment && node.asyncFactory
}

/* */

function proxyNormalSlot(slots, key) {
return function () { return slots[key]; }
}

/* */

/**

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)) {
if (hasSymbol && val[Symbol.iterator]) {
ret = [];
var iterator = valSymbol.iterator;
var result = iterator.next();
while (!result.done) {
ret.push(render(result.value, ret.length));
result = iterator.next();
}
} else {
keys = Object.keys(val);
ret = new Array(keys.length);
for (i = 0, l = keys.length; i < l; i++) {
key = keys[i];
ret[i] = render(val[key], key, i);
}
}
}
if (!isDef(ret)) {
ret = [];
}
(ret)._isVList = true;
return ret
}

/* */

/**

Runtime helper for rendering
*/
function renderSlot (
name,
fallbackRender,
props,
bindObject
) {
var scopedSlotFn = this. $KaTeX parse error: Expected '}', got 'EOF' at end of input: \dotsodes = this.$ slots[name] ||
(typeof fallbackRender === ‘function’ ? fallbackRender() : fallbackRender);
}

var target = props && props.slot;
if (target) {return this.$createElement('template', { slot: target }, nodes)
} else {return nodes
}

}

/* */

/**

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

/* */

function isKeyNotMatch (expect, actual) {
if (Array.isArray(expect)) {
return expect.indexOf(actual) === -1
} else {
return expect !== actual
}
}

/**

Runtime helper for checking keyCodes from config.
exposed as Vue.prototype._k
passing in eventKeyName as last argument separately for backwards compat
*/
function checkKeyCodes (
eventKeyCode,
key,
builtInKeyCode,
eventKeyName,
builtInKeyName
) {
var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
return isKeyNotMatch(builtInKeyName, eventKeyName)
} else if (mappedKeyCode) {
return isKeyNotMatch(mappedKeyCode, eventKeyCode)
} else if (eventKeyName) {
return hyphenate(eventKeyName) !== key
}
return eventKeyCode === undefined
}

/* */

/**

Runtime helper for merging v-bind=“object” into a VNode’s data.
*/
function bindObjectProps (
data,
tag,
value,
asProp,
isSync
) {
if (value) {
if (!isObject(value)) {
warn(
‘v-bind without argument expects an Object or Array value’,
this
);
} else {
if (Array.isArray(value)) {
value = toObject(value);
}
var hash;
var loop = function ( key ) {
if (
key === ‘class’ ||
key === ‘style’ ||
isReservedAttribute(key)
) {
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 = {});
}
var camelizedKey = camelize(key);
var hyphenatedKey = hyphenate(key);
if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
hash[key] = value[key];
```
   if (isSync) {var on = data.on || (data.on = {});on[("update:" + key)] = function ($event) {value[key] = $event;};}}
```
};

for (var key in value) loop( key );
}
}
return data
}

/* */

/**

Runtime helper for rendering static trees.
*/
function renderStatic (
index,
isInFor
) {
var cached = this._staticTrees || (this._staticTrees = []);
var tree = cached[index];
// if has already-rendered static tree and not inside v-for,
// we can reuse the same tree.
if (tree && !isInFor) {
return tree
}
// otherwise, render a fresh tree.
tree = cached[index] = this.$options.staticRenderFns[index].call(
this._renderProxy,
null,
this // for render fns generated for functional component templates
);
markStatic(tree, (“static” + index), false);
return tree
}

/**

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

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

/* */

/* */

/* */

// helper to dynamically append modifier runtime markers to event names.
// ensure only append when value is already string, otherwise it will be cast
// to string and cause the type check to miss.
function prependModifier (value, symbol) {
return typeof value === ‘string’ ? symbol + value : value
}

/* */

function installRenderHelpers (target) {
target._o = markOnce;
target._n = toNumber;
target._s = toString;
target._l = renderList;
target._t = renderSlot;
target._q = looseEqual;
target._i = looseIndexOf;
target._m = renderStatic;
target._f = resolveFilter;
target._k = checkKeyCodes;
target._b = bindObjectProps;
target._v = createTextVNode;
target._e = createEmptyVNode;
target._u = resolveScopedSlots;
target._g = bindObjectListeners;
target._d = bindDynamicKeys;
target._p = prependModifier;
}

/* */

function FunctionalRenderContext (
data,
props,
children,
parent,
Ctor
) {
var this$1 = this;

var options = Ctor.options;
// ensure the createElement function in functional components
// gets a unique context - this is necessary for correct named slot check
var contextVm;
if (hasOwn(parent, '_uid')) {contextVm = Object.create(parent);// $flow-disable-linecontextVm._original = parent;
} else {// the context vm passed in is a functional context as well.// in this case we want to make sure we are able to get a hold to the// real context instance.contextVm = parent;// $flow-disable-lineparent = parent._original;
}
var isCompiled = isTrue(options._compiled);
var needNormalization = !isCompiled;this.data = data;
this.props = props;
this.children = children;
this.parent = parent;
this.listeners = data.on || emptyObject;
this.injections = resolveInject(options.inject, parent);
this.slots = function () {if (!this$1.$slots) {normalizeScopedSlots(data.scopedSlots,this$1.$slots = resolveSlots(children, parent));}return this$1.$slots
};Object.defineProperty(this, 'scopedSlots', ({enumerable: true,get: function get () {return normalizeScopedSlots(data.scopedSlots, this.slots())}
}));// support for compiled functional template
if (isCompiled) {// exposing $options for renderStatic()this.$options = options;// pre-resolve slots for renderSlot()this.$slots = this.slots();this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
}if (options._scopeId) {this._c = function (a, b, c, d) {var vnode = createElement(contextVm, a, b, c, d, needNormalization);if (vnode && !Array.isArray(vnode)) {vnode.fnScopeId = options._scopeId;vnode.fnContext = parent;}return vnode};
} else {this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
}

}

installRenderHelpers(FunctionalRenderContext.prototype);

var renderContext = new FunctionalRenderContext(data,props,children,contextVm,Ctor
);var vnode = options.render.call(null, renderContext._c, renderContext);if (vnode instanceof VNode) {return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
} else if (Array.isArray(vnode)) {var vnodes = normalizeChildren(vnode) || [];var res = new Array(vnodes.length);for (var i = 0; i < vnodes.length; i++) {res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);}return res
}

}

function mergeProps (to, from) {
for (var key in from) {
to[camelize(key)] = from[key];
}
}

/* */

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

prepatch: function prepatch (oldVnode, vnode) {var options = vnode.componentOptions;var child = vnode.componentInstance = oldVnode.componentInstance;updateChildComponent(child,options.propsData, // updated propsoptions.listeners, // updated listenersvnode, // new parent vnodeoptions.children // new children);
},insert: function insert (vnode) {var context = vnode.context;var componentInstance = vnode.componentInstance;if (!componentInstance._isMounted) {componentInstance._isMounted = true;callHook(componentInstance, 'mounted');}if (vnode.data.keepAlive) {if (context._isMounted) {// vue-router#1212// During updates, a kept-alive component's child components may// change, so directly walking the tree here may call activated hooks// on incorrect children. Instead we push them into a queue which will// be processed after the whole patch process ended.queueActivatedComponent(componentInstance);} else {activateChildComponent(componentInstance, true /* direct */);}}
},destroy: function destroy (vnode) {var componentInstance = vnode.componentInstance;if (!componentInstance._isDestroyed) {if (!vnode.data.keepAlive) {componentInstance.$destroy();} else {deactivateChildComponent(componentInstance, true /* direct */);}}
}

};

var hooksToMerge = Object.keys(componentVNodeHooks);

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

var baseCtor = context.$options._base;// plain options object: turn it into a constructor
if (isObject(Ctor)) {Ctor = baseCtor.extend(Ctor);
}// if at this stage it's not a constructor or an async component factory,
// reject.
if (typeof Ctor !== 'function') {{warn(("Invalid Component definition: " + (String(Ctor))), context);}return
}// async component
var asyncFactory;
if (isUndef(Ctor.cid)) {asyncFactory = Ctor;Ctor = resolveAsyncComponent(asyncFactory, baseCtor);if (Ctor === undefined) {// return a placeholder node for async component, which is rendered// as a comment node but preserves all the raw information for the node.// the information will be used for async server-rendering and hydration.return createAsyncPlaceholder(asyncFactory,data,context,children,tag)}
}data = data || {};// resolve constructor options in case global mixins are applied after
// component constructor creation
resolveConstructorOptions(Ctor);// transform component v-model data into props & events
if (isDef(data.model)) {transformModel(Ctor.options, data);
}// extract props
var propsData = extractPropsFromVNodeData(data, Ctor, tag);// functional component
if (isTrue(Ctor.options.functional)) {return createFunctionalComponent(Ctor, propsData, data, context, children)
}// extract listeners, since these needs to be treated as
// child component listeners instead of DOM listeners
var listeners = data.on;
// replace with listeners with .native modifier
// so it gets processed during parent component patch.
data.on = data.nativeOn;if (isTrue(Ctor.options.abstract)) {// abstract components do not keep anything// other than props & listeners & slot// work around flowvar slot = data.slot;data = {};if (slot) {data.slot = slot;}
}// install component management hooks onto the placeholder node
installComponentHooks(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 },asyncFactory
);return vnode

}

function mergeHook$1 (f1, f2) {
var merged = function (a, b) {
// flow complains about extra args which is why we use any
f1(a, b);
f2(a, b);
};
merged._merged = true;
return merged
}

// transform component v-model info (value and callback) into
// prop and event handler respectively.
function transformModel (options, data) {
var prop = (options.model && options.model.prop) || ‘value’;
var event = (options.model && options.model.event) || ‘input’
;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
var on = data.on || (data.on = {});
var existing = on[event];
var callback = data.model.callback;
if (isDef(existing)) {
if (
Array.isArray(existing)
? existing.indexOf(callback) === -1
: existing !== callback
) {
on[event] = [callback].concat(existing);
}
} else {
on[event] = callback;
}
}

/* */

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 (isTrue(alwaysNormalize)) {
normalizationType = ALWAYS_NORMALIZE;
}
return _createElement(context, tag, data, children, normalizationType)
}

// ref #5318
// necessary to ensure parent re-render when deep bindings like :style and
// :class are used on slot nodes
function registerDeepBindings (data) {
if (isObject(data.style)) {
traverse(data.style);
}
if (isObject(data.class)) {
traverse(data.class);
}
}

/* */

function initRender (vm) {
vm._vnode = null; // the root of the child tree
vm._staticTrees = null; // v-once cached trees
var options = vm. $o pt i o n s; v a r p a re n t Vn o d e = v m .$ vnode = options._parentVnode; // the placeholder node in parent tree
var renderContext = parentVnode && parentVnode.context;
vm. $slots = resolveSlots(options._renderChildren, renderContext); vm.$ scopedSlots = emptyObject;
// bind the createElement fn to this instance
// so that we get proper render context inside it.
// args order: tag, data, children, normalizationType, alwaysNormalize
// internal version is used by render functions compiled from templates
vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
// normalization is always applied for the public version, used in
// user-written render functions.
vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };

// $attrs & $listeners are exposed for easier HOC creation.
// they need to be reactive so that HOCs using them are always updated
var parentData = parentVnode && parentVnode.data;/* istanbul ignore else */
{defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {!isUpdatingChildComponent && warn("$attrs is readonly.", vm);}, true);defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {!isUpdatingChildComponent && warn("$listeners is readonly.", vm);}, true);
}

}

var currentRenderingInstance = null;

function renderMixin (Vue) {
// install runtime convenience helpers
installRenderHelpers(Vue.prototype);

Vue.prototype.$nextTick = function (fn) {return nextTick(fn, this)
};Vue.prototype._render = function () {var vm = this;var ref = vm.$options;var render = ref.render;var _parentVnode = ref._parentVnode;if (_parentVnode) {vm.$scopedSlots = normalizeScopedSlots(_parentVnode.data.scopedSlots,vm.$slots,vm.$scopedSlots);}// set parent vnode. this allows render functions to have access// to the data on the placeholder node.vm.$vnode = _parentVnode;// render selfvar vnode;try {// There's no need to maintain a stack because all render fns are called// separately from one another. Nested component's render fns are called// when parent component is patched.currentRenderingInstance = vm;vnode = render.call(vm._renderProxy, vm.$createElement);} catch (e) {handleError(e, vm, "render");// return error render result,// or previous vnode to prevent render error causing blank component/* istanbul ignore else */if (vm.$options.renderError) {try {vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);} catch (e) {handleError(e, vm, "renderError");vnode = vm._vnode;}} else {vnode = vm._vnode;}} finally {currentRenderingInstance = null;}// if the returned array contains only a single node, allow itif (Array.isArray(vnode) && vnode.length === 1) {vnode = vnode[0];}// return empty vnode in case the render function errored outif (!(vnode instanceof VNode)) {if (Array.isArray(vnode)) {warn('Multiple root nodes returned from render function. Render function ' +'should return a single root node.',vm);}vnode = createEmptyVNode();}// set parentvnode.parent = _parentVnode;return vnode
};

}

/* */

function ensureCtor (comp, base) {
if (
comp.__esModule ||
(hasSymbol && comp[Symbol.toStringTag] === ‘Module’)
) {
comp = comp.default;
}
return isObject(comp)
? base.extend(comp)
: comp
}

function createAsyncPlaceholder (
factory,
data,
context,
children,
tag
) {
var node = createEmptyVNode();
node.asyncFactory = factory;
node.asyncMeta = { data: data, context: context, children: children, tag: tag };
return node
}

function resolveAsyncComponent (
factory,
baseCtor
) {
if (isTrue(factory.error) && isDef(factory.errorComp)) {
return factory.errorComp
}

if (isDef(factory.resolved)) {return factory.resolved
}var owner = currentRenderingInstance;
if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {// already pendingfactory.owners.push(owner);
}if (isTrue(factory.loading) && isDef(factory.loadingComp)) {return factory.loadingComp
}if (owner && !isDef(factory.owners)) {var owners = factory.owners = [owner];var sync = true;var timerLoading = null;var timerTimeout = null;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });var forceRender = function (renderCompleted) {for (var i = 0, l = owners.length; i < l; i++) {(owners[i]).$forceUpdate();}if (renderCompleted) {owners.length = 0;if (timerLoading !== null) {clearTimeout(timerLoading);timerLoading = null;}if (timerTimeout !== null) {clearTimeout(timerTimeout);timerTimeout = null;}}};var resolve = once(function (res) {// cache resolvedfactory.resolved = ensureCtor(res, baseCtor);// invoke callbacks only if this is not a synchronous resolve// (async resolves are shimmed as synchronous during SSR)if (!sync) {forceRender(true);} else {owners.length = 0;}});var reject = once(function (reason) {warn("Failed to resolve async component: " + (String(factory)) +(reason ? ("\nReason: " + reason) : ''));if (isDef(factory.errorComp)) {factory.error = true;forceRender(true);}});var res = factory(resolve, reject);if (isObject(res)) {if (isPromise(res)) {// () => Promiseif (isUndef(factory.resolved)) {res.then(resolve, reject);}} else if (isPromise(res.component)) {res.component.then(resolve, reject);if (isDef(res.error)) {factory.errorComp = ensureCtor(res.error, baseCtor);}if (isDef(res.loading)) {factory.loadingComp = ensureCtor(res.loading, baseCtor);if (res.delay === 0) {factory.loading = true;} else {timerLoading = setTimeout(function () {timerLoading = null;if (isUndef(factory.resolved) && isUndef(factory.error)) {factory.loading = true;forceRender(false);}}, res.delay || 200);}}if (isDef(res.timeout)) {timerTimeout = setTimeout(function () {timerTimeout = null;if (isUndef(factory.resolved)) {reject("timeout (" + (res.timeout) + "ms)");}}, res.timeout);}}}sync = false;// return in case resolved synchronouslyreturn factory.loading? factory.loadingComp: factory.resolved
}

}

/* */

/* */

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) {
target.$on(event, fn);
}

function remove $KaTeX parse error: Expected '}', got 'EOF' at end of input: \dots) { target.$ off(event, fn);
}

function createOnceHandler (event, fn) {
var _target = target;
return function onceHandler () {
var res = fn.apply(null, arguments);
if (res !== null) {
_target.$off(event, onceHandler);
}
}
}

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

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 vm = this;// allif (!arguments.length) {vm._events = Object.create(null);return vm}// array of eventsif (Array.isArray(event)) {for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {vm.$off(event[i$1], fn);}return vm}// specific eventvar cbs = vm._events[event];if (!cbs) {return vm}if (!fn) {vm._events[event] = null;return vm}// specific handlervar cb;var i = cbs.length;while (i--) {cb = cbs[i];if (cb === fn || cb.fn === fn) {cbs.splice(i, 1);break}}return vm
};Vue.prototype.$emit = function (event) {var vm = this;{var lowerCaseEvent = event.toLowerCase();if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {tip("Event \"" + lowerCaseEvent + "\" is emitted in component " +(formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +"Note that HTML attributes are case-insensitive and you cannot use " +"v-on to listen to camelCase events when using in-DOM templates. " +"You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\".");}}var cbs = vm._events[event];if (cbs) {cbs = cbs.length > 1 ? toArray(cbs) : cbs;var args = toArray(arguments, 1);var info = "event handler for \"" + event + "\"";for (var i = 0, l = cbs.length; i < l; i++) {invokeWithErrorHandling(cbs[i], vm, args, vm, info);}}return vm
};

}

/* */

var activeInstance = null;
var isUpdatingChildComponent = false;

function setActiveInstance(vm) {
var prevActiveInstance = activeInstance;
activeInstance = vm;
return function () {
activeInstance = prevActiveInstance;
}
}

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 parentvar parent = vm.$parent;if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {remove(parent.$children, vm);}// teardown watchersif (vm._watcher) {vm._watcher.teardown();}var i = vm._watchers.length;while (i--) {vm._watchers[i].teardown();}// remove reference from data ob// frozen object may not have observer.if (vm._data.__ob__) {vm._data.__ob__.vmCount--;}// call the last hook...vm._isDestroyed = true;// invoke destroy hooks on current rendered treevm.__patch__(vm._vnode, null);// fire destroyed hookcallHook(vm, 'destroyed');// turn off all instance listeners.vm.$off();// remove __vue__ referenceif (vm.$el) {vm.$el.__vue__ = null;}// release circular reference (#6759)if (vm.$vnode) {vm.$vnode.parent = null;}
};

}

var updateComponent;
/* istanbul ignore if */
if (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(("vue " + name + " render"), startTag, endTag);mark(startTag);vm._update(vnode, hydrating);mark(endTag);measure(("vue " + name + " patch"), startTag, endTag);};
} else {updateComponent = function () {vm._update(vm._render(), hydrating);};
}// we set this to vm._watcher inside the watcher's constructor
// since the watcher's initial patch may call $forceUpdate (e.g. inside child
// component's mounted hook), which relies on vm._watcher being already defined
new Watcher(vm, updateComponent, noop, {before: function before () {if (vm._isMounted && !vm._isDestroyed) {callHook(vm, 'beforeUpdate');}}
}, true /* isRenderWatcher */);
hydrating = false;// manually mounted instance, call mounted on self
// mounted is called for render-created child components in its inserted hook
if (vm.$vnode == null) {vm._isMounted = true;callHook(vm, 'mounted');
}
return vm

}

function updateChildComponent (
vm,
propsData,
listeners,
parentVnode,
renderChildren
) {
{
isUpdatingChildComponent = true;
}

// determine whether component has slot children
// we need to do this before overwriting $options._renderChildren.// check if there are dynamic scopedSlots (hand-written or compiled but with
// dynamic slot names). Static scoped slots compiled from template has the
// "$stable" marker.
var newScopedSlots = parentVnode.data.scopedSlots;
var oldScopedSlots = vm.$scopedSlots;
var hasDynamicScopedSlot = !!((newScopedSlots && !newScopedSlots.$stable) ||(oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||(newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||(!newScopedSlots && vm.$scopedSlots.$key)
);// Any static slot children from the parent may have changed during parent's
// update. Dynamic scoped slots may also have changed. In such cases, a forced
// update is necessary to ensure correctness.
var needsForceUpdate = !!(renderChildren ||               // has new static slotsvm.$options._renderChildren ||  // has old static slotshasDynamicScopedSlot
);vm.$options._parentVnode = parentVnode;
vm.$vnode = parentVnode; // update vm's placeholder node without re-renderif (vm._vnode) { // update child tree's parentvm._vnode.parent = parentVnode;
}
vm.$options._renderChildren = renderChildren;// update $attrs and $listeners hash
// these are also reactive so they may trigger child update if the child
// used them during render
vm.$attrs = parentVnode.data.attrs || emptyObject;
vm.$listeners = listeners || emptyObject;// update props
if (propsData && vm.$options.props) {toggleObserving(false);var props = vm._props;var propKeys = vm.$options._propKeys || [];for (var i = 0; i < propKeys.length; i++) {var key = propKeys[i];var propOptions = vm.$options.props; // wtf flow?props[key] = validateProp(key, propOptions, propsData, vm);}toggleObserving(true);// keep a copy of raw propsDatavm.$options.propsData = propsData;
}// update listeners
listeners = listeners || emptyObject;
var oldListeners = vm.$options._parentListeners;
vm.$options._parentListeners = listeners;
updateComponentListeners(vm, listeners, oldListeners);// resolve slots + force update if has children
if (needsForceUpdate) {vm.$slots = resolveSlots(renderChildren, parentVnode.context);vm.$forceUpdate();
}{isUpdatingChildComponent = false;
}

}

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

function callHook (vm, hook) {
// #7573 disable dep collection when invoking lifecycle hooks
pushTarget();
var handlers = vm. $KaTeX parse error: Expected '}', got 'EOF' at end of input: \dotsnt) { vm.$ emit(‘hook:’ + hook);
}
popTarget();
}

/* */

var MAX_UPDATE_COUNT = 100;

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

/**

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

// Async edge case #6566 requires saving the timestamp when event listeners are
// attached. However, calling performance.now() has a perf overhead especially
// if the page has thousands of event listeners. Instead, we take a timestamp
// every time the scheduler flushes and use that for all event listeners
// attached during that flush.
var currentFlushTimestamp = 0;

// Async edge case fix requires storing an event listener’s attach timestamp.
var getNow = Date.now;

// Determine what event timestamp the browser is using. Annoyingly, the
// timestamp can either be hi-res (relative to page load) or low-res
// (relative to UNIX epoch), so in order to compare time we have to use the
// same timestamp type when saving the flush timestamp.
// All IE versions use low-res event timestamps, and have problematic clock
// implementations (#9632)
if (inBrowser && !isIE) {
var performance = window.performance;
if (
performance &&
typeof performance.now === ‘function’ &&
getNow() > document.createEvent(‘Event’).timeStamp
) {
// if the event timestamp, although evaluated AFTER the Date.now(), is
// smaller than it, it means the event is using a hi-res timestamp,
// and we need to use the hi-res version for event listener timestamps as
// well.
getNow = function () { return performance.now(); };
}
}

/**

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

// Sort queue before flush.
// This ensures that:
// 1. Components are updated from parent to child. (because parent is always
//    created before the child)
// 2. A component's user watchers are run before its render watcher (because
//    user watchers are created before the render watcher)
// 3. If a component is destroyed during a parent component's watcher run,
//    its watchers can be skipped.
queue.sort(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];if (watcher.before) {watcher.before();}id = watcher.id;has[id] = null;watcher.run();// in dev build, check and stop circular updates.if (has[id] != null) {circular[id] = (circular[id] || 0) + 1;if (circular[id] > MAX_UPDATE_COUNT) {warn('You may have an infinite update loop ' + (watcher.user? ("in watcher with expression \"" + (watcher.expression) + "\""): "in a component render function."),watcher.vm);break}}
}// keep copies of post queues before resetting state
var activatedQueue = activatedChildren.slice();
var updatedQueue = queue.slice();resetSchedulerState();// call component updated and activated hooks
callActivatedHooks(activatedQueue);
callUpdatedHooks(updatedQueue);// devtool hook
/* istanbul ignore if */
if (devtools && config.devtools) {devtools.emit('flush');
}

}

/**

Queue a kept-alive component that was activated during patch.
The queue will be processed after the entire tree has been patched.
*/
function queueActivatedComponent (vm) {
// setting _inactive to false here so that a render function can
// rely on checking whether it’s in an inactive tree (e.g. router-view)
vm._inactive = false;
activatedChildren.push(vm);
}

function callActivatedHooks (queue) {
for (var i = 0; i < queue.length; i++) {
queue[i]._inactive = true;
activateChildComponent(queue[i], true /* true */);
}
}

/**

Push a watcher into the watcher queue.
Jobs with duplicate IDs will be skipped unless it’s
pushed when the queue is being flushed.
*/
function queueWatcher (watcher) {
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 > index && queue[i].id > watcher.id) {
i–;
}
queue.splice(i + 1, 0, watcher);
}
// queue the flush
if (!waiting) {
waiting = true;

if (!config.async) {
flushSchedulerQueue();
return
}
nextTick(flushSchedulerQueue);
}
}
}

/* */

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,
isRenderWatcher
) {
this.vm = vm;
if (isRenderWatcher) {
vm._watcher = this;
}
vm._watchers.push(this);
// options
if (options) {
this.deep = !!options.deep;
this.user = !!options.user;
this.lazy = !!options.lazy;
this.sync = !!options.sync;
this.before = options.before;
} else {
this.deep = this.user = this.lazy = this.sync = false;
}
this.cb = cb;
this.id = ++uid$2; // uid for batching
this.active = true;
this.dirty = this.lazy; // for lazy watchers
this.deps = [];
this.newDeps = [];
this.depIds = new _Set();
this.newDepIds = new _Set();
this.expression = expOrFn.toString();
// parse expression for getter
if (typeof expOrFn === ‘function’) {
this.getter = expOrFn;
} else {
this.getter = parsePath(expOrFn);
if (!this.getter) {
this.getter = noop;
warn(
"Failed watching path: “” + expOrFn + “” " +
'Watcher only accepts simple dot-delimited paths. ’ +
‘For full control, use a function instead.’,
vm
);
}
}
this.value = this.lazy
? undefined
: this.get();
};

/**

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

/**

Add a dependency to this directive.
*/
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 i = this.deps.length;
while (i–) {
var dep = this.deps[i];
if (!this.newDepIds.has(dep.id)) {
dep.removeSub(this);
}
}
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) {
var info = “callback for watcher “” + (this.expression) + “””;
invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
} 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 i = this.deps.length;
while (i–) {
this.deps[i].depend();
}
};

/**

Remove self from all dependencies’ subscriber list.
*/
Watcher.prototype.teardown = function teardown () {
if (this.active) {
// remove self from vm’s watcher list
// this is a somewhat expensive operation so we skip it
// if the vm is being destroyed.
if (!this.vm._isBeingDestroyed) {
remove(this.vm._watchers, this);
}
var i = this.deps.length;
while (i–) {
this.deps[i].removeSub(this);
}
this.active = false;
}
};

/* */

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

for (var key in propsOptions) loop( key );
toggleObserving(true);

}

var computedWatcherOptions = { lazy: true };

function initComputed (vm, computed) {
// $flow-disable-line
var watchers = vm._computedWatchers = Object.create(null);
// computed properties are just getters during SSR
var isSSR = isServerRendering();

for (var key in computed) {var userDef = computed[key];var getter = typeof userDef === 'function' ? userDef : userDef.get;if (getter == null) {warn(("Getter is missing for computed property \"" + key + "\"."),vm);}if (!isSSR) {// create internal watcher for the computed property.watchers[key] = new Watcher(vm,getter || noop,noop,computedWatcherOptions);}// component-defined computed properties are already defined on the// component prototype. We only need to define computed properties defined// at instantiation here.if (!(key in vm)) {defineComputed(vm, key, userDef);} else {if (key in vm.$data) {warn(("The computed property \"" + key + "\" is already defined in data."), vm);} else if (vm.$options.props && key in vm.$options.props) {warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);} else if (vm.$options.methods && key in vm.$options.methods) {warn(("The computed property \"" + key + "\" is already defined as a method."), vm);}}
}

}

function createGetterInvoker(fn) {
return function computedGetter () {
return fn.call(this, this)
}
}

Vue.prototype.$set = set;
Vue.prototype.$delete = del;Vue.prototype.$watch = function (expOrFn,cb,options
) {var vm = this;if (isPlainObject(cb)) {return createWatcher(vm, expOrFn, cb, options)}options = options || {};options.user = true;var watcher = new Watcher(vm, expOrFn, cb, options);if (options.immediate) {var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";pushTarget();invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);popTarget();}return function unwatchFn () {watcher.teardown();}
};

}

/* */

var uid$3 = 0;

function initMixin (Vue) {
Vue.prototype._init = function (options) {
var vm = this;
// a uid
vm._uid = uid$3++;

  var startTag, endTag;/* istanbul ignore if */if (config.performance && mark) {startTag = "vue-perf-start:" + (vm._uid);endTag = "vue-perf-end:" + (vm._uid);mark(startTag);}// a flag to avoid this being observedvm._isVue = true;// merge optionsif (options && options._isComponent) {// optimize internal component instantiation// since dynamic options merging is pretty slow, and none of the// internal component options needs special treatment.initInternalComponent(vm, options);} else {vm.$options = mergeOptions(resolveConstructorOptions(vm.constructor),options || {},vm);}/* istanbul ignore else */{initProxy(vm);}// expose real selfvm._self = vm;initLifecycle(vm);initEvents(vm);initRender(vm);callHook(vm, 'beforeCreate');initInjections(vm); // resolve injections before data/propsinitState(vm);initProvide(vm); // resolve provide after data/propscallHook(vm, 'created');/* istanbul ignore if */if (config.performance && mark) {vm._name = formatComponentName(vm, false);mark(endTag);measure(("vue " + (vm._name) + " init"), startTag, endTag);}if (vm.$options.el) {vm.$mount(vm.$options.el);}
};

}

function initInternalComponent (vm, options) {
var opts = vm.$options = Object.create(vm.constructor.options);
// doing this because it’s faster than dynamic enumeration.
var parentVnode = options._parentVnode;
opts.parent = options.parent;
opts._parentVnode = parentVnode;

var vnodeComponentOptions = parentVnode.componentOptions;
opts.propsData = vnodeComponentOptions.propsData;
opts._parentListeners = vnodeComponentOptions.listeners;
opts._renderChildren = vnodeComponentOptions.children;
opts._componentTag = vnodeComponentOptions.tag;if (options.render) {opts.render = options.render;opts.staticRenderFns = options.staticRenderFns;
}

}

function Vue (options) {
if (!(this instanceof Vue)
) {
warn(‘Vue is a constructor and should be called with the new keyword’);
}
this._init(options);
}

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

/* */

function initUse (Vue) {
Vue.use = function (plugin) {
var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
if (installedPlugins.indexOf(plugin) > -1) {
return this
}

  // additional parametersvar args = toArray(arguments, 1);args.unshift(this);if (typeof plugin.install === 'function') {plugin.install.apply(plugin, args);} else if (typeof plugin === 'function') {plugin.apply(null, args);}installedPlugins.push(plugin);return this
};

}

/* */

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

/* */

function initExtend (Vue) {
/**
* Each instance constructor, including Vue, has a unique
* cid. This enables us to create wrapped “child
* constructors” for prototypal inheritance and cache them.
*/
Vue.cid = 0;
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 (name) {validateComponentName(name);}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 usageSub.extend = Super.extend;Sub.mixin = Super.mixin;Sub.use = Super.use;// create asset registers, so extended classes// can have their private assets too.ASSET_TYPES.forEach(function (type) {Sub[type] = Super[type];});// enable recursive self-lookupif (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 constructorcachedCtors[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]);
}
}

/* */

/* */

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

function matches (pattern, name) {
if (Array.isArray(pattern)) {
return pattern.indexOf(name) > -1
} else if (typeof pattern === ‘string’) {
return pattern.split(‘,’).indexOf(name) > -1
} else if (isRegExp(pattern)) {
return pattern.test(name)
}
/* istanbul ignore next */
return false
}

function pruneCacheEntry (
cache,
key,
keys,
current
) {
var entry = cache[key];
if (entry && (!current || entry.tag !== current.tag)) {
entry.componentInstance.$destroy();
}
cache[key] = null;
remove(keys, key);
}

var patternTypes = [String, RegExp, Array];

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

props: {include: patternTypes,exclude: patternTypes,max: [String, Number]
},methods: {cacheVNode: function cacheVNode() {var ref = this;var cache = ref.cache;var keys = ref.keys;var vnodeToCache = ref.vnodeToCache;var keyToCache = ref.keyToCache;if (vnodeToCache) {var tag = vnodeToCache.tag;var componentInstance = vnodeToCache.componentInstance;var componentOptions = vnodeToCache.componentOptions;cache[keyToCache] = {name: getComponentName(componentOptions),tag: tag,componentInstance: componentInstance,};keys.push(keyToCache);// prune oldest entryif (this.max && keys.length > parseInt(this.max)) {pruneCacheEntry(cache, keys[0], keys, this._vnode);}this.vnodeToCache = null;}}
},created: function created () {this.cache = Object.create(null);this.keys = [];
},destroyed: function destroyed () {for (var key in this.cache) {pruneCacheEntry(this.cache, key, this.keys);}
},mounted: function mounted () {var this$1 = this;this.cacheVNode();this.$watch('include', function (val) {pruneCache(this$1, function (name) { return matches(val, name); });});this.$watch('exclude', function (val) {pruneCache(this$1, function (name) { return !matches(val, name); });});
},updated: function updated () {this.cacheVNode();
},render: function render () {var slot = this.$slots.default;var vnode = getFirstComponentChild(slot);var componentOptions = vnode && vnode.componentOptions;if (componentOptions) {// check patternvar name = getComponentName(componentOptions);var ref = this;var include = ref.include;var exclude = ref.exclude;if (// not included(include && (!name || !matches(include, name))) ||// excluded(exclude && name && matches(exclude, name))) {return vnode}var ref$1 = this;var cache = ref$1.cache;var keys = ref$1.keys;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 (cache[key]) {vnode.componentInstance = cache[key].componentInstance;// make current key freshestremove(keys, key);keys.push(key);} else {// delay setting the cache until updatethis.vnodeToCache = vnode;this.keyToCache = key;}vnode.data.keepAlive = true;}return vnode || (slot && slot[0])
}

};

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;// 2.6 explicit observable API
Vue.observable = function (obj) {observe(obj);return obj
};Vue.options = Object.create(null);
ASSET_TYPES.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);

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

Object.defineProperty(Vue.prototype, ' $KaTeX parse error: Expected '}', got 'EOF' at end of input: \dots return this.$ vnode && this.$vnode.ssrContext
}
});

// expose FunctionalRenderContext for ssr runtime helper installation
Object.defineProperty(Vue, ‘FunctionalRenderContext’, {
value: FunctionalRenderContext
});

Vue.version = ‘2.6.14’;

/* */

// these are reserved for web because they are directly compiled away
// during template compilation
var isReservedAttr = makeMap(‘style,class’);

// attributes that should be using props for binding
var acceptValue = makeMap(‘input,textarea,option,select,progress’);
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 isValidContentEditableValue = makeMap(‘events,caret,typing,plaintext-only’);

var convertEnumeratedValue = function (key, value) {
return isFalsyAttrValue(value) || value === ‘false’
? ‘false’
// allow arbitrary string value for contenteditable
: key === ‘contenteditable’ && isValidContentEditableValue(value)
? value
: ‘true’
};

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,’ +
‘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: isDef(child.class)
? [child.class, parent.class]
: parent.class
}
}

function renderClass (
staticClass,
dynamicClass
) {
if (isDef(staticClass) || isDef(dynamicClass)) {
return concat(staticClass, stringifyClass(dynamicClass))
}
/* istanbul ignore next */
return ‘’
}

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

function stringifyClass (value) {
if (Array.isArray(value)) {
return stringifyArray(value)
}
if (isObject(value)) {
return stringifyObject(value)
}
if (typeof value === ‘string’) {
return value
}
/* istanbul ignore next */
return ‘’
}

function stringifyObject (value) {
var res = ‘’;
for (var key in value) {
if (value[key]) {
if (res) { res += ’ '; }
res += key;
}
}
return res
}

/* */

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,picture,hr,img,li,main,ol,p,pre,ul,’ +
‘a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,’ +
‘s,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,’ +
‘embed,object,param,source,canvas,script,noscript,del,ins,’ +
‘caption,col,colgroup,table,thead,tbody,td,th,tr,’ +
‘button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,’ +
‘output,progress,select,textarea,’ +
‘details,dialog,menu,menuitem,summary,’ +
‘content,element,shadow,template,blockquote,iframe,tfoot’
);

// this map is intentionally selective, only covering SVG elements that may
// contain child elements.
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’
}
}

var isTextInputType = makeMap(‘text,number,password,search,email,tel,url’);

/* */

/**

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

/* */

function createElement$1 (tagName, vnode) {
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 setStyleScope (node, scopeId) {
node.setAttribute(scopeId, ‘’);
}

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

/* */

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

var vm = vnode.context;
var ref = vnode.componentInstance || vnode.elm;
var refs = vm.$refs;
if (isRemoval) {if (Array.isArray(refs[key])) {remove(refs[key], ref);} else if (refs[key] === ref) {refs[key] = undefined;}
} else {if (vnode.data.refInFor) {if (!Array.isArray(refs[key])) {refs[key] = [ref];} else if (refs[key].indexOf(ref) < 0) {// $flow-disable-linerefs[key].push(ref);}} else {refs[key] = ref;}
}

}

/**

Virtual DOM patching algorithm based on Snabbdom by
Simon Friis Vindum (@paldepind)
Licensed under the MIT License
https://github.com/paldepind/snabbdom/blob/master/LICENSE
modified by Evan You (@yyx990803)
Not type-checking this because this file is perf-critical and the cost
of making flow understand it is not worth it.
*/

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

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

function sameVnode (a, b) {
return (
a.key === b.key &&
a.asyncFactory === b.asyncFactory && (
(
a.tag === b.tag &&
a.isComment === b.isComment &&
isDef(a.data) === isDef(b.data) &&
sameInputType(a, b)
) || (
isTrue(a.isAsyncPlaceholder) &&
isUndef(b.asyncFactory.error)
)
)
)
}

function sameInputType (a, b) {
if (a.tag !== ‘input’) { return true }
var i;
var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
}

function createKeyToOldIdx (children, beginIdx, endIdx) {
var i, key;
var map = {};
for (i = beginIdx; i <= endIdx; ++i) {
key = children[i].key;
if (isDef(key)) { map[key] = i; }
}
return map
}

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 (isDef(modules[j][hooks[i]])) {cbs[hooks[i]].push(modules[j][hooks[i]]);}}
}function emptyNodeAt (elm) {return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
}function createRmCb (childElm, listeners) {function remove$$1 () {if (--remove$$1.listeners === 0) {removeNode(childElm);}}remove$$1.listeners = listeners;return remove$$1
}function removeNode (el) {var parent = nodeOps.parentNode(el);// element may have already been removed due to v-html / v-textif (isDef(parent)) {nodeOps.removeChild(parent, el);}
}function isUnknownElement$$1 (vnode, inVPre) {return (!inVPre &&!vnode.ns &&!(config.ignoredElements.length &&config.ignoredElements.some(function (ignore) {return isRegExp(ignore)? ignore.test(vnode.tag): ignore === vnode.tag})) &&config.isUnknownElement(vnode.tag))
}var creatingElmInVPre = 0;function createElm (vnode,insertedVnodeQueue,parentElm,refElm,nested,ownerArray,index
) {if (isDef(vnode.elm) && isDef(ownerArray)) {// This vnode was used in a previous render!// now it's used as a new node, overwriting its elm would cause// potential patch errors down the road when it's used as an insertion// reference node. Instead, we clone the node on-demand before creating// associated DOM element for it.vnode = ownerArray[index] = cloneVNode(vnode);}vnode.isRootInsert = !nested; // for transition enter checkif (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {return}var data = vnode.data;var children = vnode.children;var tag = vnode.tag;if (isDef(tag)) {{if (data && data.pre) {creatingElmInVPre++;}if (isUnknownElement$$1(vnode, creatingElmInVPre)) {warn('Unknown custom element: <' + tag + '> - did you ' +'register the component correctly? For recursive components, ' +'make sure to provide the "name" option.',vnode.context);}}vnode.elm = vnode.ns? nodeOps.createElementNS(vnode.ns, tag): nodeOps.createElement(tag, vnode);setScope(vnode);/* istanbul ignore if */{createChildren(vnode, children, insertedVnodeQueue);if (isDef(data)) {invokeCreateHooks(vnode, insertedVnodeQueue);}insert(parentElm, vnode.elm, refElm);}if (data && data.pre) {creatingElmInVPre--;}} else if (isTrue(vnode.isComment)) {vnode.elm = nodeOps.createComment(vnode.text);insert(parentElm, vnode.elm, refElm);} else {vnode.elm = nodeOps.createTextNode(vnode.text);insert(parentElm, vnode.elm, refElm);}
}function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {var i = vnode.data;if (isDef(i)) {var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;if (isDef(i = i.hook) && isDef(i = i.init)) {i(vnode, false /* hydrating */);}// after calling the init hook, if the vnode is a child component// it should've created a child instance and mounted it. the child// component also has set the placeholder vnode's elm.// in that case we can just return the element and be done.if (isDef(vnode.componentInstance)) {initComponent(vnode, insertedVnodeQueue);insert(parentElm, vnode.elm, refElm);if (isTrue(isReactivated)) {reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);}return true}}
}function initComponent (vnode, insertedVnodeQueue) {if (isDef(vnode.data.pendingInsert)) {insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);vnode.data.pendingInsert = null;}vnode.elm = vnode.componentInstance.$el;if (isPatchable(vnode)) {invokeCreateHooks(vnode, insertedVnodeQueue);setScope(vnode);} else {// empty component root.// skip all element-related modules except for ref (#3455)registerRef(vnode);// make sure to invoke the insert hookinsertedVnodeQueue.push(vnode);}
}function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {var i;// hack for #4339: a reactivated component with inner transition// does not trigger because the inner node's created hooks are not called// again. It's not ideal to involve module-specific logic in here but// there doesn't seem to be a better way to do it.var innerNode = vnode;while (innerNode.componentInstance) {innerNode = innerNode.componentInstance._vnode;if (isDef(i = innerNode.data) && isDef(i = i.transition)) {for (i = 0; i < cbs.activate.length; ++i) {cbs.activate[i](emptyNode, innerNode);}insertedVnodeQueue.push(innerNode);break}}// unlike a newly created component,// a reactivated keep-alive component doesn't insert itselfinsert(parentElm, vnode.elm, refElm);
}function insert (parent, elm, ref$$1) {if (isDef(parent)) {if (isDef(ref$$1)) {if (nodeOps.parentNode(ref$$1) === parent) {nodeOps.insertBefore(parent, elm, ref$$1);}} else {nodeOps.appendChild(parent, elm);}}
}function createChildren (vnode, children, insertedVnodeQueue) {if (Array.isArray(children)) {{checkDuplicateKeys(children);}for (var i = 0; i < children.length; ++i) {createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);}} else if (isPrimitive(vnode.text)) {nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));}
}function isPatchable (vnode) {while (vnode.componentInstance) {vnode = vnode.componentInstance._vnode;}return isDef(vnode.tag)
}function invokeCreateHooks (vnode, insertedVnodeQueue) {for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {cbs.create[i$1](emptyNode, vnode);}i = vnode.data.hook; // Reuse variableif (isDef(i)) {if (isDef(i.create)) { i.create(emptyNode, vnode); }if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }}
}// set scope id attribute for scoped CSS.
// this is implemented as a special case to avoid the overhead
// of going through the normal attribute patching process.
function setScope (vnode) {var i;if (isDef(i = vnode.fnScopeId)) {nodeOps.setStyleScope(vnode.elm, i);} else {var ancestor = vnode;while (ancestor) {if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {nodeOps.setStyleScope(vnode.elm, i);}ancestor = ancestor.parent;}}// for slot content they should also get the scopeId from the host instance.if (isDef(i = activeInstance) &&i !== vnode.context &&i !== vnode.fnContext &&isDef(i = i.$options._scopeId)) {nodeOps.setStyleScope(vnode.elm, i);}
}function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {for (; startIdx <= endIdx; ++startIdx) {createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);}
}function invokeDestroyHook (vnode) {var i, j;var data = vnode.data;if (isDef(data)) {if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }}if (isDef(i = vnode.children)) {for (j = 0; j < vnode.children.length; ++j) {invokeDestroyHook(vnode.children[j]);}}
}function removeVnodes (vnodes, startIdx, endIdx) {for (; startIdx <= endIdx; ++startIdx) {var ch = vnodes[startIdx];if (isDef(ch)) {if (isDef(ch.tag)) {removeAndInvokeRemoveHook(ch);invokeDestroyHook(ch);} else { // Text noderemoveNode(ch.elm);}}}
}function removeAndInvokeRemoveHook (vnode, rm) {if (isDef(rm) || isDef(vnode.data)) {var i;var listeners = cbs.remove.length + 1;if (isDef(rm)) {// we have a recursively passed down rm callback// increase the listeners countrm.listeners += listeners;} else {// directly removingrm = createRmCb(vnode.elm, listeners);}// recursively invoke hooks on child component root nodeif (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {removeAndInvokeRemoveHook(i, rm);}for (i = 0; i < cbs.remove.length; ++i) {cbs.remove[i](vnode, rm);}if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {i(vnode, rm);} else {rm();}} else {removeNode(vnode.elm);}
}function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {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, vnodeToMove, refElm;// removeOnly is a special flag used only by <transition-group>// to ensure removed elements stay in correct relative positions// during leaving transitionsvar canMove = !removeOnly;{checkDuplicateKeys(newCh);}while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {if (isUndef(oldStartVnode)) {oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left} else if (isUndef(oldEndVnode)) {oldEndVnode = oldCh[--oldEndIdx];} else if (sameVnode(oldStartVnode, newStartVnode)) {patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);oldStartVnode = oldCh[++oldStartIdx];newStartVnode = newCh[++newStartIdx];} else if (sameVnode(oldEndVnode, newEndVnode)) {patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);oldEndVnode = oldCh[--oldEndIdx];newEndVnode = newCh[--newEndIdx];} else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved rightpatchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));oldStartVnode = oldCh[++oldStartIdx];newEndVnode = newCh[--newEndIdx];} else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved leftpatchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);oldEndVnode = oldCh[--oldEndIdx];newStartVnode = newCh[++newStartIdx];} else {if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }idxInOld = isDef(newStartVnode.key)? oldKeyToIdx[newStartVnode.key]: findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);if (isUndef(idxInOld)) { // New elementcreateElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);} else {vnodeToMove = oldCh[idxInOld];if (sameVnode(vnodeToMove, newStartVnode)) {patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);oldCh[idxInOld] = undefined;canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);} else {// same key but different element. treat as new elementcreateElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);}}newStartVnode = newCh[++newStartIdx];}}if (oldStartIdx > oldEndIdx) {refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);} else if (newStartIdx > newEndIdx) {removeVnodes(oldCh, oldStartIdx, oldEndIdx);}
}function checkDuplicateKeys (children) {var seenKeys = {};for (var i = 0; i < children.length; i++) {var vnode = children[i];var key = vnode.key;if (isDef(key)) {if (seenKeys[key]) {warn(("Duplicate keys detected: '" + key + "'. This may cause an update error."),vnode.context);} else {seenKeys[key] = true;}}}
}function findIdxInOld (node, oldCh, start, end) {for (var i = start; i < end; i++) {var c = oldCh[i];if (isDef(c) && sameVnode(node, c)) { return i }}
}function patchVnode (oldVnode,vnode,insertedVnodeQueue,ownerArray,index,removeOnly
) {if (oldVnode === vnode) {return}if (isDef(vnode.elm) && isDef(ownerArray)) {// clone reused vnodevnode = ownerArray[index] = cloneVNode(vnode);}var elm = vnode.elm = oldVnode.elm;if (isTrue(oldVnode.isAsyncPlaceholder)) {if (isDef(vnode.asyncFactory.resolved)) {hydrate(oldVnode.elm, vnode, insertedVnodeQueue);} else {vnode.isAsyncPlaceholder = true;}return}// reuse element for static trees.// note we only do this if the vnode is cloned -// if the new node is not cloned it means the render functions have been// reset by the hot-reload-api and we need to do a proper re-render.if (isTrue(vnode.isStatic) &&isTrue(oldVnode.isStatic) &&vnode.key === oldVnode.key &&(isTrue(vnode.isCloned) || isTrue(vnode.isOnce))) {vnode.componentInstance = oldVnode.componentInstance;return}var i;var data = vnode.data;if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {i(oldVnode, vnode);}var oldCh = oldVnode.children;var ch = vnode.children;if (isDef(data) && isPatchable(vnode)) {for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }}if (isUndef(vnode.text)) {if (isDef(oldCh) && isDef(ch)) {if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }} else if (isDef(ch)) {{checkDuplicateKeys(ch);}if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);} else if (isDef(oldCh)) {removeVnodes(oldCh, 0, oldCh.length - 1);} else if (isDef(oldVnode.text)) {nodeOps.setTextContent(elm, '');}} else if (oldVnode.text !== vnode.text) {nodeOps.setTextContent(elm, vnode.text);}if (isDef(data)) {if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }}
}function invokeInsertHook (vnode, queue, initial) {// delay insert hooks for component root nodes, invoke them after the// element is really insertedif (isTrue(initial) && isDef(vnode.parent)) {vnode.parent.data.pendingInsert = queue;} else {for (var i = 0; i < queue.length; ++i) {queue[i].data.hook.insert(queue[i]);}}
}var hydrationBailed = false;
// list of modules that can skip create hook during hydration because they
// are already rendered on the client or has no need for initialization
// Note: style is excluded because it relies on initial clone for future
// deep updates (#7063).
var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');// Note: this is a browser-only function so we can assume elms are DOM nodes.
function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {var i;var tag = vnode.tag;var data = vnode.data;var children = vnode.children;inVPre = inVPre || (data && data.pre);vnode.elm = elm;if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {vnode.isAsyncPlaceholder = true;return true}// assert node match{if (!assertNodeMatch(elm, vnode, inVPre)) {return false}}if (isDef(data)) {if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }if (isDef(i = vnode.componentInstance)) {// child component. it should have hydrated its own tree.initComponent(vnode, insertedVnodeQueue);return true}}if (isDef(tag)) {if (isDef(children)) {// empty element, allow client to pick up and populate childrenif (!elm.hasChildNodes()) {createChildren(vnode, children, insertedVnodeQueue);} else {// v-html and domProps: innerHTMLif (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {if (i !== elm.innerHTML) {/* istanbul ignore if */if (typeof console !== 'undefined' &&!hydrationBailed) {hydrationBailed = true;console.warn('Parent: ', elm);console.warn('server innerHTML: ', i);console.warn('client innerHTML: ', elm.innerHTML);}return false}} else {// iterate and compare children listsvar 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, inVPre)) {childrenMatch = false;break}childNode = childNode.nextSibling;}// if childNode is not null, it means the actual childNodes list is// longer than the virtual children list.if (!childrenMatch || childNode) {/* istanbul ignore if */if (typeof console !== 'undefined' &&!hydrationBailed) {hydrationBailed = true;console.warn('Parent: ', elm);console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);}return false}}}}if (isDef(data)) {var fullInvoke = false;for (var key in data) {if (!isRenderedModule(key)) {fullInvoke = true;invokeCreateHooks(vnode, insertedVnodeQueue);break}}if (!fullInvoke && data['class']) {// ensure collecting deps for deep class bindings for future updatestraverse(data['class']);}}} else if (elm.data !== vnode.text) {elm.data = vnode.text;}return true
}function assertNodeMatch (node, vnode, inVPre) {if (isDef(vnode.tag)) {return vnode.tag.indexOf('vue-component') === 0 || (!isUnknownElement$$1(vnode, inVPre) &&vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase()))} else {return node.nodeType === (vnode.isComment ? 8 : 3)}
}return function patch (oldVnode, vnode, hydrating, removeOnly) {if (isUndef(vnode)) {if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }return}var isInitialPatch = false;var insertedVnodeQueue = [];if (isUndef(oldVnode)) {// empty mount (likely as component), create new root elementisInitialPatch = true;createElm(vnode, insertedVnodeQueue);} else {var isRealElement = isDef(oldVnode.nodeType);if (!isRealElement && sameVnode(oldVnode, vnode)) {// patch existing root nodepatchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);} else {if (isRealElement) {// mounting to a real element// check if this is server-rendered content and if we can perform// a successful hydration.if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {oldVnode.removeAttribute(SSR_ATTR);hydrating = true;}if (isTrue(hydrating)) {if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {invokeInsertHook(vnode, insertedVnodeQueue, true);return oldVnode} else {warn('The client-side rendered virtual DOM tree is not matching ' +'server-rendered content. This is likely caused by incorrect ' +'HTML markup, for example nesting block-level elements inside ' +'<p>, or missing <tbody>. Bailing hydration and performing ' +'full client-side render.');}}// either not server-rendered, or hydration failed.// create an empty node and replace itoldVnode = emptyNodeAt(oldVnode);}// replacing existing elementvar oldElm = oldVnode.elm;var parentElm = nodeOps.parentNode(oldElm);// create new nodecreateElm(vnode,insertedVnodeQueue,// extremely rare edge case: do not insert if old element is in a// leaving transition. Only happens when combining transition +// keep-alive + HOCs. (#4590)oldElm._leaveCb ? null : parentElm,nodeOps.nextSibling(oldElm));// update parent placeholder node element, recursivelyif (isDef(vnode.parent)) {var ancestor = vnode.parent;var patchable = isPatchable(vnode);while (ancestor) {for (var i = 0; i < cbs.destroy.length; ++i) {cbs.destroy[i](ancestor);}ancestor.elm = vnode.elm;if (patchable) {for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {cbs.create[i$1](emptyNode, ancestor);}// #6513// invoke insert hooks that may have been merged by create hooks.// e.g. for directives that uses the "inserted" hook.var insert = ancestor.data.hook.insert;if (insert.merged) {// start at index 1 to avoid re-invoking component mounted hookfor (var i$2 = 1; i$2 < insert.fns.length; i$2++) {insert.fns[i$2]();}}} else {registerRef(ancestor);}ancestor = ancestor.parent;}}// destroy old nodeif (isDef(parentElm)) {removeVnodes([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, bindcallHook$1(dir, 'bind', vnode, oldVnode);if (dir.def && dir.def.inserted) {dirsWithInsert.push(dir);}} else {// existing directive, updatedir.oldValue = oldDir.value;dir.oldArg = oldDir.arg;callHook$1(dir, 'update', vnode, oldVnode);if (dir.def && dir.def.componentUpdated) {dirsWithPostpatch.push(dir);}}
}if (dirsWithInsert.length) {var callInsert = function () {for (var i = 0; i < dirsWithInsert.length; i++) {callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);}};if (isCreate) {mergeVNodeHook(vnode, 'insert', callInsert);} else {callInsert();}
}if (dirsWithPostpatch.length) {mergeVNodeHook(vnode, 'postpatch', 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, unbindcallHook$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(‘.’)))
}

var baseModules = [
ref,
directives
];

/* */

for (key in attrs) {cur = attrs[key];old = oldAttrs[key];if (old !== cur) {setAttr(elm, key, cur, vnode.data.pre);}
}
// #4391: in IE9, setting type can reset value for input[type=radio]
// #6666: IE/Edge forces progress value down to 1 before setting a max
/* istanbul ignore if */
if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {setAttr(elm, 'value', attrs.value);
}
for (key in oldAttrs) {if (isUndef(attrs[key])) {if (isXlink(key)) {elm.removeAttributeNS(xlinkNS, getXlinkProp(key));} else if (!isEnumeratedAttr(key)) {elm.removeAttribute(key);}}
}

}

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

/* */

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

var cls = genClassForVnode(vnode);// handle transition classes
var transitionClass = el._transitionClasses;
if (isDef(transitionClass)) {cls = concat(cls, stringifyClass(transitionClass));
}// set the class
if (cls !== el._prevClass) {el.setAttribute('class', cls);el._prevClass = cls;
}

}

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

/* */

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 && // pipeexp.charCodeAt(i + 1) !== 0x7C &&exp.charCodeAt(i - 1) !== 0x7C &&!curly && !square && !paren) {if (expression === undefined) {// first filter, end of expressionlastFilterIndex = 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 charfor (; 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

}

/* */

/* eslint-disable no-unused-vars /
function baseWarn (msg, range) {
console.error(("[Vue compiler]: " + msg));
}
/ eslint-enable no-unused-vars */

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

function addProp (el, name, value, range, dynamic) {
(el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
el.plain = false;
}

function addAttr (el, name, value, range, dynamic) {
var attrs = dynamic
? (el.dynamicAttrs || (el.dynamicAttrs = []))
: (el.attrs || (el.attrs = []));
attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
el.plain = false;
}

// add a raw attr (use this in preTransforms)
function addRawAttr (el, name, value, range) {
el.attrsMap[name] = value;
el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
}

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

function prependModifierMarker (symbol, name, dynamic) {
return dynamic
? (“_p(” + name + “,”" + symbol + “”)")
: symbol + name // mark the event as captured
}

function addHandler (
el,
name,
value,
modifiers,
important,
warn,
range,
dynamic
) {
modifiers = modifiers || emptyObject;
// warn prevent and passive modifier
/* istanbul ignore if */
if (
warn &&
modifiers.prevent && modifiers.passive
) {
warn(
'passive and prevent can’t be used together. ’ +
‘Passive handler can’t prevent default event.’,
range
);
}

// normalize click.right and click.middle since they don't actually fire
// this is technically browser-specific, but at least for now browsers are
// the only target envs that have right/middle clicks.
if (modifiers.right) {if (dynamic) {name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";} else if (name === 'click') {name = 'contextmenu';delete modifiers.right;}
} else if (modifiers.middle) {if (dynamic) {name = "(" + name + ")==='click'?'mouseup':(" + name + ")";} else if (name === 'click') {name = 'mouseup';}
}// check capture modifier
if (modifiers.capture) {delete modifiers.capture;name = prependModifierMarker('!', name, dynamic);
}
if (modifiers.once) {delete modifiers.once;name = prependModifierMarker('~', name, dynamic);
}
/* istanbul ignore if */
if (modifiers.passive) {delete modifiers.passive;name = prependModifierMarker('&', name, dynamic);
}var events;
if (modifiers.native) {delete modifiers.native;events = el.nativeEvents || (el.nativeEvents = {});
} else {events = el.events || (el.events = {});
}var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
if (modifiers !== emptyObject) {newHandler.modifiers = modifiers;
}var handlers = events[name];
/* istanbul ignore if */
if (Array.isArray(handlers)) {important ? handlers.unshift(newHandler) : handlers.push(newHandler);
} else if (handlers) {events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
} else {events[name] = newHandler;
}el.plain = false;

}

function getRawBindingAttr (
el,
name
) {
return el.rawAttrsMap[‘:’ + name] ||
el.rawAttrsMap[‘v-bind:’ + name] ||
el.rawAttrsMap[name]
}

function getBindingAttr (
el,
name,
getStatic
) {
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)
}
}
}

// note: this only removes the attr from the Array (attrsList) so that it
// doesn’t get processed by processAttrs.
// By default it does NOT remove it from the map (attrsMap) because the map is
// needed during codegen.
function getAndRemoveAttr (
el,
name,
removeFromMap
) {
var val;
if ((val = el.attrsMap[name]) != null) {
var list = el.attrsList;
for (var i = 0, l = list.length; i < l; i++) {
if (list[i].name === name) {
list.splice(i, 1);
break
}
}
}
if (removeFromMap) {
delete el.attrsMap[name];
}
return val
}

function rangeSetItem (
item,
range
) {
if (range) {
if (range.start != null) {
item.start = range.start;
}
if (range.end != null) {
item.end = range.end;
}
}
return item
}

/* */

/**

Cross-platform code generation for component v-model
*/
function genComponentModel (
el,
value,
modifiers
) {
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: JSON.stringify(value),callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
};

}

/**

Cross-platform codegen helper for generating v-model value assignment code.
*/
function genAssignmentCode (
value,
assignment
) {
var res = parseModel(value);
if (res.key === null) {
return (value + “=” + assignment)
} else {
return (“$set(” + (res.exp) + ", " + (res.key) + ", " + assignment + “)”)
}
}

/**

Parse a v-model expression into a base path and a final key segment.
Handles both dot-path and possible square brackets.
Possible cases:
- test
- test[key]
- test[test1[key]]
- test[“a”][key]
- xxx.test[a[a].test1[key]]
- test.xxx.a[“asa”][test1[key]]

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

function parseModel (val) {
// Fix https://github.com/vuejs/vue/pull/7730
// allow v-model="obj.val " (trailing whitespace)
val = val.trim();
len = val.length;

if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {index$1 = val.lastIndexOf('.');if (index$1 > -1) {return {exp: val.slice(0, index$1),key: '"' + val.slice(index$1 + 1) + '"'}} else {return {exp: val,key: null}}
}str = val;
index$1 = expressionPos = expressionEndPos = 0;while (!eof()) {chr = next();/* istanbul ignore if */if (isStringStart(chr)) {parseString(chr);} else if (chr === 0x5B) {parseBracket(chr);}
}return {exp: val.slice(0, expressionPos),key: val.slice(expressionPos + 1, expressionEndPos)
}

}

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

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

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

function 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;

{// inputs with type="file" are read only and setting the input's// value will throw an error.if (tag === 'input' && type === 'file') {warn$1("<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +"File inputs are read only. Use a v-on:change listener instead.",el.rawAttrsMap['v-model']);}
}if (el.component) {genComponentModel(el, value, modifiers);// component v-model doesn't need extra runtimereturn false
} else if (tag === 'select') {genSelect(el, value, modifiers);
} else if (tag === 'input' && type === 'checkbox') {genCheckboxModel(el, value, modifiers);
} else if (tag === 'input' && type === 'radio') {genRadioModel(el, value, modifiers);
} else if (tag === 'input' || tag === 'textarea') {genDefaultModel(el, value, modifiers);
} else if (!config.isReservedTag(tag)) {genComponentModel(el, value, modifiers);// component v-model doesn't need extra runtimereturn false
} else {warn$1("<" + (el.tag) + " v-model=\"" + value + "\">: " +"v-model is not supported on this element type. " +'If you are working with contenteditable, it\'s recommended to ' +'wrap a library dedicated for that purpose inside a custom component.',el.rawAttrsMap['v-model']);
}// ensure runtime directive metadata
return true

}

function 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, ‘change’, 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;

// warn if v-bind:value conflicts with v-model
// except for inputs with v-bind:type
{var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];if (value$1 && !typeBinding) {var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';warn$1(binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +'because the latter already expands to a value binding internally',el.rawAttrsMap[binding]);}
}var ref = modifiers || {};
var lazy = ref.lazy;
var number = ref.number;
var trim = ref.trim;
var needCompositionGuard = !lazy && type !== 'range';
var event = lazy? 'change': type === 'range'? RANGE_TOKEN: 'input';var valueExpression = '$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) {addHandler(el, 'blur', '$forceUpdate()');
}

}

/* */

// normalize v-model event tokens that can only be determined at runtime.
// it’s important to place the event as the first in the array because
// the whole point is ensuring the v-model callback gets called before
// user-attached handlers.
function normalizeEvents (on) {
/* istanbul ignore if /
if (isDef(on[RANGE_TOKEN])) {
// IE input[type=range] only supports change event
var event = isIE ? ‘change’ : ‘input’;
on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
delete on[RANGE_TOKEN];
}
// This was originally intended to fix #4521 but no longer necessary
// after 2.5. Keeping it for backwards compat with generated code from < 2.4
/ istanbul ignore if */
if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
delete on[CHECKBOX_RADIO_TOKEN];
}
}

var target$1;

// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
// implementation and does not fire microtasks in between event propagation, so
// safe to exclude.
var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);

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

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

/* */

var svgContainer;

for (key in oldProps) {if (!(key in props)) {elm[key] = '';}
}for (key in props) {cur = props[key];// ignore children if the node has textContent or innerHTML,// as these will throw away existing DOM nodes and cause removal errors// on subsequent patches (#3360)if (key === 'textContent' || key === 'innerHTML') {if (vnode.children) { vnode.children.length = 0; }if (cur === oldProps[key]) { continue }// #6601 work around Chrome version <= 55 bug where single textNode// replaced by innerHTML/textContent retains its parentNode propertyif (elm.childNodes.length === 1) {elm.removeChild(elm.childNodes[0]);}}if (key === 'value' && elm.tagName !== 'PROGRESS') {// store value as _value as well since// non-string values will be stringifiedelm._value = cur;// avoid resetting cursor position when value is the samevar strCur = isUndef(cur) ? '' : String(cur);if (shouldUpdateValue(elm, strCur)) {elm.value = strCur;}} else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {// IE doesn't support innerHTML for SVG elementssvgContainer = svgContainer || document.createElement('div');svgContainer.innerHTML = "<svg>" + cur + "</svg>";var svg = svgContainer.firstChild;while (elm.firstChild) {elm.removeChild(elm.firstChild);}while (svg.firstChild) {elm.appendChild(svg.firstChild);}} else if (// skip the update if old and new VDOM state is the same.// `value` is handled separately because the DOM value may be temporarily// out of sync with VDOM state due to focus, composition and modifiers.// This  #4521 by skipping the unnecessary `checked` update.cur !== oldProps[key]) {// some property updates can throw// e.g. `value` on <progress> w/ non-finite valuetry {elm[key] = cur;} catch (e) {}}
}

}

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

function shouldUpdateValue (elm, checkVal) {
return (!elm.composing && (
elm.tagName === ‘OPTION’ ||
isNotInFocusAndDirty(elm, checkVal) ||
isDirtyWithModifiers(elm, checkVal)
))
}

function isNotInFocusAndDirty (elm, checkVal) {
// return true when textbox (.number and .trim) loses focus and its value is
// not equal to the updated value
var notInFocus = true;
// #6157
// work around IE bug when accessing document.activeElement in an iframe
try { notInFocus = document.activeElement !== elm; } catch (e) {}
return notInFocus && elm.value !== checkVal
}

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

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

/* */

// 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 && 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 vendorNames = [‘Webkit’, ‘Moz’, ‘ms’];

var emptyStyle;
var normalize = cached(function (prop) {
emptyStyle = emptyStyle || document.createElement(‘div’).style;
prop = camelize(prop);
if (prop !== ‘filter’ && (prop in emptyStyle)) {
return prop
}
var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
for (var i = 0; i < vendorNames.length; i++) {
var name = vendorNames[i] + capName;
if (name in emptyStyle) {
return name
}
}
});

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

if (isUndef(data.staticStyle) && isUndef(data.style) &&isUndef(oldData.staticStyle) && isUndef(oldData.style)
) {return
}var cur, name;
var el = vnode.elm;
var oldStaticStyle = oldData.staticStyle;
var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};// if static style exists, stylebinding already merged into it when doing normalizeStyleData
var oldStyle = oldStaticStyle || oldStyleBinding;var style = normalizeStyleBinding(vnode.data.style) || {};// store normalized style under a different key for next diff
// make sure to clone it if it's reactive, since the user likely wants
// to mutate it.
vnode.data.normalizedStyle = isDef(style.__ob__)? extend({}, style): style;var newStyle = getStyle(vnode, true);for (name in oldStyle) {if (isUndef(newStyle[name])) {setProp(el, name, '');}
}
for (name in newStyle) {cur = newStyle[name];if (cur !== oldStyle[name]) {// ie9 setting to null has no effect, must use empty stringsetProp(el, name, cur == null ? '' : cur);}
}

}

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

/* */

var whitespaceRE = /\s+/;

/**

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

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

}

/* */

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
: /* istanbul ignore next */ function (fn) { return fn(); };

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

function addTransitionClass (el, cls) {
var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
if (transitionClasses.indexOf(cls) < 0) {
transitionClasses.push(cls);
addClass(el, cls);
}
}

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

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

function getTransitionInfo (el, expectedType) {
var styles = window.getComputedStyle(el);
// JSDOM may return undefined for transition properties
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])
}))

}

// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
// in a locale-dependent way, using a comma instead of a dot.
// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
// as a floor function) causing unexpected behaviors
function toMs (s) {
return Number(s.slice(0, -1).replace(‘,’, ‘.’)) * 1000
}

/* */

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

// call leave callback now
if (isDef(el._leaveCb)) {el._leaveCb.cancelled = true;el._leaveCb();
}var data = resolveTransition(vnode.data.transition);
if (isUndef(data)) {return
}/* istanbul ignore if */
if (isDef(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) {context = transitionNode.context;transitionNode = transitionNode.parent;
}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 (explicitEnterDuration != null) {checkDuration(explicitEnterDuration, 'enter', vnode);
}var expectsCSS = css !== false && !isIE9;
var userWantsControl = getHookArgumentsLength(enterHook);var cb = el._enterCb = once(function () {if (expectsCSS) {removeTransitionClass(el, toClass);removeTransitionClass(el, activeClass);}if (cb.cancelled) {if (expectsCSS) {removeTransitionClass(el, startClass);}enterCancelledHook && enterCancelledHook(el);} else {afterEnterHook && afterEnterHook(el);}el._enterCb = null;
});if (!vnode.data.show) {// remove pending leave element on enter by injecting an insert hookmergeVNodeHook(vnode, '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 () {removeTransitionClass(el, startClass);if (!cb.cancelled) {addTransitionClass(el, toClass);if (!userWantsControl) {if (isValidDuration(explicitEnterDuration)) {setTimeout(cb, explicitEnterDuration);} else {whenTransitionEnds(el, type, cb);}}}});
}if (vnode.data.show) {toggleDisplay && toggleDisplay();enterHook && enterHook(el, cb);
}if (!expectsCSS && !userWantsControl) {cb();
}

}

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

// call enter callback now
if (isDef(el._enterCb)) {el._enterCb.cancelled = true;el._enterCb();
}var data = resolveTransition(vnode.data.transition);
if (isUndef(data) || el.nodeType !== 1) {return rm()
}/* istanbul ignore if */
if (isDef(el._leaveCb)) {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 (isDef(explicitLeaveDuration)) {checkDuration(explicitLeaveDuration, 'leave', vnode);
}var cb = el._leaveCb = once(function () {if (el.parentNode && el.parentNode._pending) {el.parentNode._pending[vnode.key] = null;}if (expectsCSS) {removeTransitionClass(el, leaveToClass);removeTransitionClass(el, leaveActiveClass);}if (cb.cancelled) {if (expectsCSS) {removeTransitionClass(el, leaveClass);}leaveCancelled && leaveCancelled(el);} else {rm();afterLeave && afterLeave(el);}el._leaveCb = null;
});if (delayLeave) {delayLeave(performLeave);
} else {performLeave();
}function performLeave () {// the delayed leave may have already been cancelledif (cb.cancelled) {return}// record leaving elementif (!vnode.data.show && el.parentNode) {(el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;}beforeLeave && beforeLeave(el);if (expectsCSS) {addTransitionClass(el, leaveClass);addTransitionClass(el, leaveActiveClass);nextFrame(function () {removeTransitionClass(el, leaveClass);if (!cb.cancelled) {addTransitionClass(el, leaveToClass);if (!userWantsControl) {if (isValidDuration(explicitLeaveDuration)) {setTimeout(cb, explicitLeaveDuration);} else {whenTransitionEnds(el, type, cb);}}}});}leave && leave(el, cb);if (!expectsCSS && !userWantsControl) {cb();}
}

}

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

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

/**

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

function enter (, vnode) {
if (vnode.data.show !== true) {
enter(vnode);
}
}

var 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’);
}
});
}

componentUpdated: function componentUpdated (el, binding, vnode) {if (vnode.tag === 'select') {setSelected(el, binding, vnode.context);// in case the options rendered by v-for have changed,// it's possible that the value is out-of-sync with the rendered options.// detect such cases and filter out values that no longer has a matching// option in the DOM.var prevOptions = el._vOptions;var curOptions = el._vOptions = [].map.call(el.options, getValue);if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {// trigger change event if// no matching option found for at least one valuevar needReset = el.multiple? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); }): binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);if (needReset) {trigger(el, 'change');}}}
}

};

function setSelected (el, binding, vm) {
actuallySetSelected(el, binding, vm);
/* istanbul ignore if */
if (isIE || isEdge) {
setTimeout(function () {
actuallySetSelected(el, binding, vm);
}, 0);
}
}

function hasNoMatchingOption (value, options) {
return options.every(function (o) { return !looseEqual(o, value); })
}

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

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

function onCompositionEnd (e) {
// prevent triggering an input event for no reason
if (!e.target.composing) { return }
e.target.composing = false;
trigger(e.target, ‘input’);
}

function trigger (el, type) {
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$$1 = vnode.data && vnode.data.transition;var originalDisplay = el.__vOriginalDisplay =el.style.display === 'none' ? '' : el.style.display;if (value && transition$$1) {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$$1 = vnode.data && vnode.data.transition;if (transition$$1) {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: directive,
show: show
};

/* */

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.
// 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) {
if (/\d-keep-alive$/.test(rawChild.tag)) {
return h(‘keep-alive’, {
props: rawChild.componentOptions.propsData
})
}
}

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

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

var isVShowDirective = function (d) { return d.name === ‘show’; };

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(isNotTextNode);/* istanbul ignore if */if (!children.length) {return}// warn multiple elementsif (children.length > 1) {warn('<transition> can only be used on a single element. Use ' +'<transition-group> for lists.',this.$parent);}var mode = this.mode;// warn invalid modeif (mode && mode !== 'in-out' && mode !== 'out-in') {warn('invalid <transition> mode: ' + mode,this.$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-alivevar 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? child.isComment? id + 'comment': 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 directiveif (child.data.directives && child.data.directives.some(isVShowDirective)) {child.data.show = true;}if (oldChild &&oldChild.data &&!isSameChild(child, oldChild) &&!isAsyncPlaceholder(oldChild) &&// #6687 component root is a comment node!(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)) {// replace old child transition data with fresh one// important for dynamic transitions!var oldData = oldChild.data.transition = extend({}, data);// handle transition modeif (mode === 'out-in') {// re