astexplorer.app/vendor/astexplorer/out/72.js

https://astexplorer.net with ES Modules support and Hot Reloading

(window.webpackJsonp=window.webpackJsonp||[]).push([[72],{"./node_modules/process/browser.js":function(module,exports){eval("// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n\n\n//# sourceURL=webpack:///./node_modules/process/browser.js?")},"./node_modules/setimmediate/setImmediate.js":function(module,exports,__webpack_require__){eval('/* WEBPACK VAR INJECTION */(function(global, process) {(function (global, undefined) {\n    "use strict";\n\n    if (global.setImmediate) {\n        return;\n    }\n\n    var nextHandle = 1; // Spec says greater than zero\n    var tasksByHandle = {};\n    var currentlyRunningATask = false;\n    var doc = global.document;\n    var registerImmediate;\n\n    function setImmediate(callback) {\n      // Callback can either be a function or a string\n      if (typeof callback !== "function") {\n        callback = new Function("" + callback);\n      }\n      // Copy function arguments\n      var args = new Array(arguments.length - 1);\n      for (var i = 0; i < args.length; i++) {\n          args[i] = arguments[i + 1];\n      }\n      // Store and register the task\n      var task = { callback: callback, args: args };\n      tasksByHandle[nextHandle] = task;\n      registerImmediate(nextHandle);\n      return nextHandle++;\n    }\n\n    function clearImmediate(handle) {\n        delete tasksByHandle[handle];\n    }\n\n    function run(task) {\n        var callback = task.callback;\n        var args = task.args;\n        switch (args.length) {\n        case 0:\n            callback();\n            break;\n        case 1:\n            callback(args[0]);\n            break;\n        case 2:\n            callback(args[0], args[1]);\n            break;\n        case 3:\n            callback(args[0], args[1], args[2]);\n            break;\n        default:\n            callback.apply(undefined, args);\n            break;\n        }\n    }\n\n    function runIfPresent(handle) {\n        // From the spec: "Wait until any invocations of this algorithm started before this one have completed."\n        // So if we\'re currently running a task, we\'ll need to delay this invocation.\n        if (currentlyRunningATask) {\n            // Delay by doing a setTimeout. setImmediate was tried instead, but in Firefox 7 it generated a\n            // "too much recursion" error.\n            setTimeout(runIfPresent, 0, handle);\n        } else {\n            var task = tasksByHandle[handle];\n            if (task) {\n                currentlyRunningATask = true;\n                try {\n                    run(task);\n                } finally {\n                    clearImmediate(handle);\n                    currentlyRunningATask = false;\n                }\n            }\n        }\n    }\n\n    function installNextTickImplementation() {\n        registerImmediate = function(handle) {\n            process.nextTick(function () { runIfPresent(handle); });\n        };\n    }\n\n    function canUsePostMessage() {\n        // The test against `importScripts` prevents this implementation from being installed inside a web worker,\n        // where `global.postMessage` means something completely different and can\'t be used for this purpose.\n        if (global.postMessage && !global.importScripts) {\n            var postMessageIsAsynchronous = true;\n            var oldOnMessage = global.onmessage;\n            global.onmessage = function() {\n                postMessageIsAsynchronous = false;\n            };\n            global.postMessage("", "*");\n            global.onmessage = oldOnMessage;\n            return postMessageIsAsynchronous;\n        }\n    }\n\n    function installPostMessageImplementation() {\n        // Installs an event handler on `global` for the `message` event: see\n        // * https://developer.mozilla.org/en/DOM/window.postMessage\n        // * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#crossDocumentMessages\n\n        var messagePrefix = "setImmediate$" + Math.random() + "$";\n        var onGlobalMessage = function(event) {\n            if (event.source === global &&\n                typeof event.data === "string" &&\n                event.data.indexOf(messagePrefix) === 0) {\n                runIfPresent(+event.data.slice(messagePrefix.length));\n            }\n        };\n\n        if (global.addEventListener) {\n            global.addEventListener("message", onGlobalMessage, false);\n        } else {\n            global.attachEvent("onmessage", onGlobalMessage);\n        }\n\n        registerImmediate = function(handle) {\n            global.postMessage(messagePrefix + handle, "*");\n        };\n    }\n\n    function installMessageChannelImplementation() {\n        var channel = new MessageChannel();\n        channel.port1.onmessage = function(event) {\n            var handle = event.data;\n            runIfPresent(handle);\n        };\n\n        registerImmediate = function(handle) {\n            channel.port2.postMessage(handle);\n        };\n    }\n\n    function installReadyStateChangeImplementation() {\n        var html = doc.documentElement;\n        registerImmediate = function(handle) {\n            // Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted\n            // into the document. Do so, thus queuing up the task. Remember to clean up once it\'s been called.\n            var script = doc.createElement("script");\n            script.onreadystatechange = function () {\n                runIfPresent(handle);\n                script.onreadystatechange = null;\n                html.removeChild(script);\n                script = null;\n            };\n            html.appendChild(script);\n        };\n    }\n\n    function installSetTimeoutImplementation() {\n        registerImmediate = function(handle) {\n            setTimeout(runIfPresent, 0, handle);\n        };\n    }\n\n    // If supported, we should attach to the prototype of global, since that is where setTimeout et al. live.\n    var attachTo = Object.getPrototypeOf && Object.getPrototypeOf(global);\n    attachTo = attachTo && attachTo.setTimeout ? attachTo : global;\n\n    // Don\'t get fooled by e.g. browserify environments.\n    if ({}.toString.call(global.process) === "[object process]") {\n        // For Node.js before 0.9\n        installNextTickImplementation();\n\n    } else if (canUsePostMessage()) {\n        // For non-IE10 modern browsers\n        installPostMessageImplementation();\n\n    } else if (global.MessageChannel) {\n        // For web workers, where supported\n        installMessageChannelImplementation();\n\n    } else if (doc && "onreadystatechange" in doc.createElement("script")) {\n        // For IE 6–8\n        installReadyStateChangeImplementation();\n\n    } else {\n        // For older browsers\n        installSetTimeoutImplementation();\n    }\n\n    attachTo.setImmediate = setImmediate;\n    attachTo.clearImmediate = clearImmediate;\n}(typeof self === "undefined" ? typeof global === "undefined" ? this : global : self));\n\n/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("./node_modules/webpack/buildin/global.js"), __webpack_require__("./node_modules/process/browser.js")))\n\n//# sourceURL=webpack:///./node_modules/setimmediate/setImmediate.js?')},"./node_modules/timers-browserify/main.js":function(module,exports,__webpack_require__){eval('/* WEBPACK VAR INJECTION */(function(global) {var scope = (typeof global !== "undefined" && global) ||\n            (typeof self !== "undefined" && self) ||\n            window;\nvar apply = Function.prototype.apply;\n\n// DOM APIs, for completeness\n\nexports.setTimeout = function() {\n  return new Timeout(apply.call(setTimeout, scope, arguments), clearTimeout);\n};\nexports.setInterval = function() {\n  return new Timeout(apply.call(setInterval, scope, arguments), clearInterval);\n};\nexports.clearTimeout =\nexports.clearInterval = function(timeout) {\n  if (timeout) {\n    timeout.close();\n  }\n};\n\nfunction Timeout(id, clearFn) {\n  this._id = id;\n  this._clearFn = clearFn;\n}\nTimeout.prototype.unref = Timeout.prototype.ref = function() {};\nTimeout.prototype.close = function() {\n  this._clearFn.call(scope, this._id);\n};\n\n// Does not start the time, just sets up the members needed.\nexports.enroll = function(item, msecs) {\n  clearTimeout(item._idleTimeoutId);\n  item._idleTimeout = msecs;\n};\n\nexports.unenroll = function(item) {\n  clearTimeout(item._idleTimeoutId);\n  item._idleTimeout = -1;\n};\n\nexports._unrefActive = exports.active = function(item) {\n  clearTimeout(item._idleTimeoutId);\n\n  var msecs = item._idleTimeout;\n  if (msecs >= 0) {\n    item._idleTimeoutId = setTimeout(function onTimeout() {\n      if (item._onTimeout)\n        item._onTimeout();\n    }, msecs);\n  }\n};\n\n// setimmediate attaches itself to the global object\n__webpack_require__("./node_modules/setimmediate/setImmediate.js");\n// On some exotic environments, it\'s not clear which object `setimmediate` was\n// able to install onto.  Search each possibility in the same order as the\n// `setimmediate` library.\nexports.setImmediate = (typeof self !== "undefined" && self.setImmediate) ||\n                       (typeof global !== "undefined" && global.setImmediate) ||\n                       (this && this.setImmediate);\nexports.clearImmediate = (typeof self !== "undefined" && self.clearImmediate) ||\n                         (typeof global !== "undefined" && global.clearImmediate) ||\n                         (this && this.clearImmediate);\n\n/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__("./node_modules/webpack/buildin/global.js")))\n\n//# sourceURL=webpack:///./node_modules/timers-browserify/main.js?')},"./node_modules/vue-template-compiler/browser.js":function(module,exports,__webpack_require__){eval("/* WEBPACK VAR INJECTION */(function(global, setImmediate) {(function (global, factory) {\n   true ? factory(exports) :\n  undefined;\n}(this, function (exports) { 'use strict';\n\n  var splitRE = /\\r?\\n/g;\n  var emptyRE = /^\\s*$/;\n  var needFixRE = /^(\\r?\\n)*[\\t\\s]/;\n\n  var deIndent = function deindent (str) {\n    if (!needFixRE.test(str)) {\n      return str\n    }\n    var lines = str.split(splitRE);\n    var min = Infinity;\n    var type, cur, c;\n    for (var i = 0; i < lines.length; i++) {\n      var line = lines[i];\n      if (!emptyRE.test(line)) {\n        if (!type) {\n          c = line.charAt(0);\n          if (c === ' ' || c === '\\t') {\n            type = c;\n            cur = count(line, type);\n            if (cur < min) {\n              min = cur;\n            }\n          } else {\n            return str\n          }\n        } else {\n          cur = count(line, type);\n          if (cur < min) {\n            min = cur;\n          }\n        }\n      }\n    }\n    return lines.map(function (line) {\n      return line.slice(min)\n    }).join('\\n')\n  };\n\n  function count (line, type) {\n    var i = 0;\n    while (line.charAt(i) === type) {\n      i++;\n    }\n    return i\n  }\n\n  /*  */\n\n  var emptyObject = Object.freeze({});\n\n  // These helpers produce better VM code in JS engines due to their\n  // explicitness and function inlining.\n  function isUndef (v) {\n    return v === undefined || v === null\n  }\n\n  /**\n   * Check if value is primitive.\n   */\n  function isPrimitive (value) {\n    return (\n      typeof value === 'string' ||\n      typeof value === 'number' ||\n      // $flow-disable-line\n      typeof value === 'symbol' ||\n      typeof value === 'boolean'\n    )\n  }\n\n  /**\n   * Quick object check - this is primarily used to tell\n   * Objects from primitive values when we know the value\n   * is a JSON-compliant type.\n   */\n  function isObject (obj) {\n    return obj !== null && typeof obj === 'object'\n  }\n\n  /**\n   * Get the raw type string of a value, e.g., [object Object].\n   */\n  var _toString = Object.prototype.toString;\n\n  function toRawType (value) {\n    return _toString.call(value).slice(8, -1)\n  }\n\n  /**\n   * Strict object type check. Only returns true\n   * for plain JavaScript objects.\n   */\n  function isPlainObject (obj) {\n    return _toString.call(obj) === '[object Object]'\n  }\n\n  /**\n   * Check if val is a valid array index.\n   */\n  function isValidArrayIndex (val) {\n    var n = parseFloat(String(val));\n    return n >= 0 && Math.floor(n) === n && isFinite(val)\n  }\n\n  /**\n   * Make a map and return a function for checking if a key\n   * is in that map.\n   */\n  function makeMap (\n    str,\n    expectsLowerCase\n  ) {\n    var map = Object.create(null);\n    var list = str.split(',');\n    for (var i = 0; i < list.length; i++) {\n      map[list[i]] = true;\n    }\n    return expectsLowerCase\n      ? function (val) { return map[val.toLowerCase()]; }\n      : function (val) { return map[val]; }\n  }\n\n  /**\n   * Check if a tag is a built-in tag.\n   */\n  var isBuiltInTag = makeMap('slot,component', true);\n\n  /**\n   * Check if an attribute is a reserved attribute.\n   */\n  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');\n\n  /**\n   * Remove an item from an array.\n   */\n  function remove (arr, item) {\n    if (arr.length) {\n      var index = arr.indexOf(item);\n      if (index > -1) {\n        return arr.splice(index, 1)\n      }\n    }\n  }\n\n  /**\n   * Check whether an object has the property.\n   */\n  var hasOwnProperty = Object.prototype.hasOwnProperty;\n  function hasOwn (obj, key) {\n    return hasOwnProperty.call(obj, key)\n  }\n\n  /**\n   * Create a cached version of a pure function.\n   */\n  function cached (fn) {\n    var cache = Object.create(null);\n    return (function cachedFn (str) {\n      var hit = cache[str];\n      return hit || (cache[str] = fn(str))\n    })\n  }\n\n  /**\n   * Camelize a hyphen-delimited string.\n   */\n  var camelizeRE = /-(\\w)/g;\n  var camelize = cached(function (str) {\n    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })\n  });\n\n  /**\n   * Hyphenate a camelCase string.\n   */\n  var hyphenateRE = /\\B([A-Z])/g;\n  var hyphenate = cached(function (str) {\n    return str.replace(hyphenateRE, '-$1').toLowerCase()\n  });\n\n  /**\n   * Simple bind polyfill for environments that do not support it,\n   * e.g., PhantomJS 1.x. Technically, we don't need this anymore\n   * since native bind is now performant enough in most browsers.\n   * But removing it would mean breaking code that was able to run in\n   * PhantomJS 1.x, so this must be kept for backward compatibility.\n   */\n\n  /* istanbul ignore next */\n  function polyfillBind (fn, ctx) {\n    function boundFn (a) {\n      var l = arguments.length;\n      return l\n        ? l > 1\n          ? fn.apply(ctx, arguments)\n          : fn.call(ctx, a)\n        : fn.call(ctx)\n    }\n\n    boundFn._length = fn.length;\n    return boundFn\n  }\n\n  function nativeBind (fn, ctx) {\n    return fn.bind(ctx)\n  }\n\n  var bind = Function.prototype.bind\n    ? nativeBind\n    : polyfillBind;\n\n  /**\n   * Mix properties into target object.\n   */\n  function extend (to, _from) {\n    for (var key in _from) {\n      to[key] = _from[key];\n    }\n    return to\n  }\n\n  /* eslint-disable no-unused-vars */\n\n  /**\n   * Perform no operation.\n   * Stubbing args to make Flow happy without leaving useless transpiled code\n   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).\n   */\n  function noop (a, b, c) {}\n\n  /**\n   * Always return false.\n   */\n  var no = function (a, b, c) { return false; };\n\n  /* eslint-enable no-unused-vars */\n\n  /**\n   * Return the same value.\n   */\n  var identity = function (_) { return _; };\n\n  /**\n   * Generate a string containing static keys from compiler modules.\n   */\n  function genStaticKeys (modules) {\n    return modules.reduce(function (keys, m) {\n      return keys.concat(m.staticKeys || [])\n    }, []).join(',')\n  }\n\n  /*  */\n\n  var isUnaryTag = makeMap(\n    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +\n    'link,meta,param,source,track,wbr'\n  );\n\n  // Elements that you can, intentionally, leave open\n  // (and which close themselves)\n  var canBeLeftOpenTag = makeMap(\n    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'\n  );\n\n  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3\n  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content\n  var isNonPhrasingTag = makeMap(\n    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +\n    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +\n    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +\n    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +\n    'title,tr,track'\n  );\n\n  /*  */\n\n  /**\n   * unicode letters used for parsing html tags, component names and property paths.\n   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname\n   * skipping \\u10000-\\uEFFFF due to it freezing up PhantomJS\n   */\n  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/;\n\n  /**\n   * Define a property.\n   */\n  function def (obj, key, val, enumerable) {\n    Object.defineProperty(obj, key, {\n      value: val,\n      enumerable: !!enumerable,\n      writable: true,\n      configurable: true\n    });\n  }\n\n  /**\n   * Not type-checking this file because it's mostly vendor code.\n   */\n\n  // Regular Expressions for parsing tags and attributes\n  var attribute = /^\\s*([^\\s\"'<>\\/=]+)(?:\\s*(=)\\s*(?:\"([^\"]*)\"+|'([^']*)'+|([^\\s\"'=<>`]+)))?/;\n  var dynamicArgAttribute = /^\\s*((?:v-[\\w-]+:|@|:|#)\\[[^=]+\\][^\\s\"'<>\\/=]*)(?:\\s*(=)\\s*(?:\"([^\"]*)\"+|'([^']*)'+|([^\\s\"'=<>`]+)))?/;\n  var ncname = \"[a-zA-Z_][\\\\-\\\\.0-9_a-zA-Z\" + (unicodeRegExp.source) + \"]*\";\n  var qnameCapture = \"((?:\" + ncname + \"\\\\:)?\" + ncname + \")\";\n  var startTagOpen = new RegExp((\"^<\" + qnameCapture));\n  var startTagClose = /^\\s*(\\/?)>/;\n  var endTag = new RegExp((\"^<\\\\/\" + qnameCapture + \"[^>]*>\"));\n  var doctype = /^<!DOCTYPE [^>]+>/i;\n  // #7298: escape - to avoid being passed as HTML comment when inlined in page\n  var comment = /^<!\\--/;\n  var conditionalComment = /^<!\\[/;\n\n  // Special Elements (can contain anything)\n  var isPlainTextElement = makeMap('script,style,textarea', true);\n  var reCache = {};\n\n  var decodingMap = {\n    '&lt;': '<',\n    '&gt;': '>',\n    '&quot;': '\"',\n    '&amp;': '&',\n    '&#10;': '\\n',\n    '&#9;': '\\t',\n    '&#39;': \"'\"\n  };\n  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;\n  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;\n\n  // #5992\n  var isIgnoreNewlineTag = makeMap('pre,textarea', true);\n  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\\n'; };\n\n  function decodeAttr (value, shouldDecodeNewlines) {\n    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;\n    return value.replace(re, function (match) { return decodingMap[match]; })\n  }\n\n  function parseHTML (html, options) {\n    var stack = [];\n    var expectHTML = options.expectHTML;\n    var isUnaryTag$$1 = options.isUnaryTag || no;\n    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;\n    var index = 0;\n    var last, lastTag;\n    while (html) {\n      last = html;\n      // Make sure we're not in a plaintext content element like script/style\n      if (!lastTag || !isPlainTextElement(lastTag)) {\n        var textEnd = html.indexOf('<');\n        if (textEnd === 0) {\n          // Comment:\n          if (comment.test(html)) {\n            var commentEnd = html.indexOf('--\x3e');\n\n            if (commentEnd >= 0) {\n              if (options.shouldKeepComment) {\n                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);\n              }\n              advance(commentEnd + 3);\n              continue\n            }\n          }\n\n          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment\n          if (conditionalComment.test(html)) {\n            var conditionalEnd = html.indexOf(']>');\n\n            if (conditionalEnd >= 0) {\n              advance(conditionalEnd + 2);\n              continue\n            }\n          }\n\n          // Doctype:\n          var doctypeMatch = html.match(doctype);\n          if (doctypeMatch) {\n            advance(doctypeMatch[0].length);\n            continue\n          }\n\n          // End tag:\n          var endTagMatch = html.match(endTag);\n          if (endTagMatch) {\n            var curIndex = index;\n            advance(endTagMatch[0].length);\n            parseEndTag(endTagMatch[1], curIndex, index);\n            continue\n          }\n\n          // Start tag:\n          var startTagMatch = parseStartTag();\n          if (startTagMatch) {\n            handleStartTag(startTagMatch);\n            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {\n              advance(1);\n            }\n            continue\n          }\n        }\n\n        var text = (void 0), rest = (void 0), next = (void 0);\n        if (textEnd >= 0) {\n          rest = html.slice(textEnd);\n          while (\n            !endTag.test(rest) &&\n            !startTagOpen.test(rest) &&\n            !comment.test(rest) &&\n            !conditionalComment.test(rest)\n          ) {\n            // < in plain text, be forgiving and treat it as text\n            next = rest.indexOf('<', 1);\n            if (next < 0) { break }\n            textEnd += next;\n            rest = html.slice(textEnd);\n          }\n          text = html.substring(0, textEnd);\n        }\n\n        if (textEnd < 0) {\n          text = html;\n        }\n\n        if (text) {\n          advance(text.length);\n        }\n\n        if (options.chars && text) {\n          options.chars(text, index - text.length, index);\n        }\n      } else {\n        var endTagLength = 0;\n        var stackedTag = lastTag.toLowerCase();\n        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\\\s\\\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));\n        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {\n          endTagLength = endTag.length;\n          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {\n            text = text\n              .replace(/<!\\--([\\s\\S]*?)--\x3e/g, '$1') // #7298\n              .replace(/<!\\[CDATA\\[([\\s\\S]*?)]]>/g, '$1');\n          }\n          if (shouldIgnoreFirstNewline(stackedTag, text)) {\n            text = text.slice(1);\n          }\n          if (options.chars) {\n            options.chars(text);\n          }\n          return ''\n        });\n        index += html.length - rest$1.length;\n        html = rest$1;\n        parseEndTag(stackedTag, index - endTagLength, index);\n      }\n\n      if (html === last) {\n        options.chars && options.chars(html);\n        if (!stack.length && options.warn) {\n          options.warn((\"Mal-formatted tag at end of template: \\\"\" + html + \"\\\"\"), { start: index + html.length });\n        }\n        break\n      }\n    }\n\n    // Clean up any remaining tags\n    parseEndTag();\n\n    function advance (n) {\n      index += n;\n      html = html.substring(n);\n    }\n\n    function parseStartTag () {\n      var start = html.match(startTagOpen);\n      if (start) {\n        var match = {\n          tagName: start[1],\n          attrs: [],\n          start: index\n        };\n        advance(start[0].length);\n        var end, attr;\n        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {\n          attr.start = index;\n          advance(attr[0].length);\n          attr.end = index;\n          match.attrs.push(attr);\n        }\n        if (end) {\n          match.unarySlash = end[1];\n          advance(end[0].length);\n          match.end = index;\n          return match\n        }\n      }\n    }\n\n    function handleStartTag (match) {\n      var tagName = match.tagName;\n      var unarySlash = match.unarySlash;\n\n      if (expectHTML) {\n        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {\n          parseEndTag(lastTag);\n        }\n        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {\n          parseEndTag(tagName);\n        }\n      }\n\n      var unary = isUnaryTag$$1(tagName) || !!unarySlash;\n\n      var l = match.attrs.length;\n      var attrs = new Array(l);\n      for (var i = 0; i < l; i++) {\n        var args = match.attrs[i];\n        var value = args[3] || args[4] || args[5] || '';\n        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'\n          ? options.shouldDecodeNewlinesForHref\n          : options.shouldDecodeNewlines;\n        attrs[i] = {\n          name: args[1],\n          value: decodeAttr(value, shouldDecodeNewlines)\n        };\n        if (options.outputSourceRange) {\n          attrs[i].start = args.start + args[0].match(/^\\s*/).length;\n          attrs[i].end = args.end;\n        }\n      }\n\n      if (!unary) {\n        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });\n        lastTag = tagName;\n      }\n\n      if (options.start) {\n        options.start(tagName, attrs, unary, match.start, match.end);\n      }\n    }\n\n    function parseEndTag (tagName, start, end) {\n      var pos, lowerCasedTagName;\n      if (start == null) { start = index; }\n      if (end == null) { end = index; }\n\n      // Find the closest opened tag of the same type\n      if (tagName) {\n        lowerCasedTagName = tagName.toLowerCase();\n        for (pos = stack.length - 1; pos >= 0; pos--) {\n          if (stack[pos].lowerCasedTag === lowerCasedTagName) {\n            break\n          }\n        }\n      } else {\n        // If no tag name is provided, clean shop\n        pos = 0;\n      }\n\n      if (pos >= 0) {\n        // Close all the open elements, up the stack\n        for (var i = stack.length - 1; i >= pos; i--) {\n          if (i > pos || !tagName &&\n            options.warn\n          ) {\n            options.warn(\n              (\"tag <\" + (stack[i].tag) + \"> has no matching end tag.\"),\n              { start: stack[i].start, end: stack[i].end }\n            );\n          }\n          if (options.end) {\n            options.end(stack[i].tag, start, end);\n          }\n        }\n\n        // Remove the open elements from the stack\n        stack.length = pos;\n        lastTag = pos && stack[pos - 1].tag;\n      } else if (lowerCasedTagName === 'br') {\n        if (options.start) {\n          options.start(tagName, [], true, start, end);\n        }\n      } else if (lowerCasedTagName === 'p') {\n        if (options.start) {\n          options.start(tagName, [], false, start, end);\n        }\n        if (options.end) {\n          options.end(tagName, start, end);\n        }\n      }\n    }\n  }\n\n  /*  */\n\n  var splitRE$1 = /\\r?\\n/g;\n  var replaceRE = /./g;\n  var isSpecialTag = makeMap('script,style,template', true);\n\n  /**\n   * Parse a single-file component (*.vue) file into an SFC Descriptor Object.\n   */\n  function parseComponent (\n    content,\n    options\n  ) {\n    if ( options === void 0 ) options = {};\n\n    var sfc = {\n      template: null,\n      script: null,\n      styles: [],\n      customBlocks: [],\n      errors: []\n    };\n    var depth = 0;\n    var currentBlock = null;\n\n    var warn = function (msg) {\n      sfc.errors.push(msg);\n    };\n\n    if (options.outputSourceRange) {\n      warn = function (msg, range) {\n        var data = { msg: msg };\n        if (range.start != null) {\n          data.start = range.start;\n        }\n        if (range.end != null) {\n          data.end = range.end;\n        }\n        sfc.errors.push(data);\n      };\n    }\n\n    function start (\n      tag,\n      attrs,\n      unary,\n      start,\n      end\n    ) {\n      if (depth === 0) {\n        currentBlock = {\n          type: tag,\n          content: '',\n          start: end,\n          attrs: attrs.reduce(function (cumulated, ref) {\n            var name = ref.name;\n            var value = ref.value;\n\n            cumulated[name] = value || true;\n            return cumulated\n          }, {})\n        };\n        if (isSpecialTag(tag)) {\n          checkAttrs(currentBlock, attrs);\n          if (tag === 'style') {\n            sfc.styles.push(currentBlock);\n          } else {\n            sfc[tag] = currentBlock;\n          }\n        } else { // custom blocks\n          sfc.customBlocks.push(currentBlock);\n        }\n      }\n      if (!unary) {\n        depth++;\n      }\n    }\n\n    function checkAttrs (block, attrs) {\n      for (var i = 0; i < attrs.length; i++) {\n        var attr = attrs[i];\n        if (attr.name === 'lang') {\n          block.lang = attr.value;\n        }\n        if (attr.name === 'scoped') {\n          block.scoped = true;\n        }\n        if (attr.name === 'module') {\n          block.module = attr.value || true;\n        }\n        if (attr.name === 'src') {\n          block.src = attr.value;\n        }\n      }\n    }\n\n    function end (tag, start) {\n      if (depth === 1 && currentBlock) {\n        currentBlock.end = start;\n        var text = content.slice(currentBlock.start, currentBlock.end);\n        if (options.deindent !== false) {\n          text = deIndent(text);\n        }\n        // pad content so that linters and pre-processors can output correct\n        // line numbers in errors and warnings\n        if (currentBlock.type !== 'template' && options.pad) {\n          text = padContent(currentBlock, options.pad) + text;\n        }\n        currentBlock.content = text;\n        currentBlock = null;\n      }\n      depth--;\n    }\n\n    function padContent (block, pad) {\n      if (pad === 'space') {\n        return content.slice(0, block.start).replace(replaceRE, ' ')\n      } else {\n        var offset = content.slice(0, block.start).split(splitRE$1).length;\n        var padChar = block.type === 'script' && !block.lang\n          ? '//\\n'\n          : '\\n';\n        return Array(offset).join(padChar)\n      }\n    }\n\n    parseHTML(content, {\n      warn: warn,\n      start: start,\n      end: end,\n      outputSourceRange: options.outputSourceRange\n    });\n\n    return sfc\n  }\n\n  /*  */\n\n  // can we use __proto__?\n  var hasProto = '__proto__' in {};\n\n  // Browser environment sniffing\n  var inBrowser = typeof window !== 'undefined';\n  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;\n  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();\n  var UA = inBrowser && window.navigator.userAgent.toLowerCase();\n  var isIE = UA && /msie|trident/.test(UA);\n  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;\n  var isEdge = UA && UA.indexOf('edge/') > 0;\n  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');\n  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');\n  var isChrome = UA && /chrome\\/\\d+/.test(UA) && !isEdge;\n  var isPhantomJS = UA && /phantomjs/.test(UA);\n  var isFF = UA && UA.match(/firefox\\/(\\d+)/);\n\n  // Firefox has a \"watch\" function on Object.prototype...\n  var nativeWatch = ({}).watch;\n  if (inBrowser) {\n    try {\n      var opts = {};\n      Object.defineProperty(opts, 'passive', ({\n        get: function get () {\n        }\n      })); // https://github.com/facebook/flow/issues/285\n      window.addEventListener('test-passive', null, opts);\n    } catch (e) {}\n  }\n\n  // this needs to be lazy-evaled because vue may be required before\n  // vue-server-renderer can set VUE_ENV\n  var _isServer;\n  var isServerRendering = function () {\n    if (_isServer === undefined) {\n      /* istanbul ignore if */\n      if (!inBrowser && !inWeex && typeof global !== 'undefined') {\n        // detect presence of vue-server-renderer and avoid\n        // Webpack shimming the process\n        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';\n      } else {\n        _isServer = false;\n      }\n    }\n    return _isServer\n  };\n\n  // detect devtools\n  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;\n\n  /* istanbul ignore next */\n  function isNative (Ctor) {\n    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())\n  }\n\n  var hasSymbol =\n    typeof Symbol !== 'undefined' && isNative(Symbol) &&\n    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);\n\n  var _Set;\n  /* istanbul ignore if */ // $flow-disable-line\n  if (typeof Set !== 'undefined' && isNative(Set)) {\n    // use native Set when available.\n    _Set = Set;\n  } else {\n    // a non-standard Set polyfill that only works with primitive keys.\n    _Set = /*@__PURE__*/(function () {\n      function Set () {\n        this.set = Object.create(null);\n      }\n      Set.prototype.has = function has (key) {\n        return this.set[key] === true\n      };\n      Set.prototype.add = function add (key) {\n        this.set[key] = true;\n      };\n      Set.prototype.clear = function clear () {\n        this.set = Object.create(null);\n      };\n\n      return Set;\n    }());\n  }\n\n  var ASSET_TYPES = [\n    'component',\n    'directive',\n    'filter'\n  ];\n\n  var LIFECYCLE_HOOKS = [\n    'beforeCreate',\n    'created',\n    'beforeMount',\n    'mounted',\n    'beforeUpdate',\n    'updated',\n    'beforeDestroy',\n    'destroyed',\n    'activated',\n    'deactivated',\n    'errorCaptured',\n    'serverPrefetch'\n  ];\n\n  /*  */\n\n\n\n  var config = ({\n    /**\n     * Option merge strategies (used in core/util/options)\n     */\n    // $flow-disable-line\n    optionMergeStrategies: Object.create(null),\n\n    /**\n     * Whether to suppress warnings.\n     */\n    silent: false,\n\n    /**\n     * Show production mode tip message on boot?\n     */\n    productionTip: \"development\" !== 'production',\n\n    /**\n     * Whether to enable devtools\n     */\n    devtools: \"development\" !== 'production',\n\n    /**\n     * Whether to record perf\n     */\n    performance: false,\n\n    /**\n     * Error handler for watcher errors\n     */\n    errorHandler: null,\n\n    /**\n     * Warn handler for watcher warns\n     */\n    warnHandler: null,\n\n    /**\n     * Ignore certain custom elements\n     */\n    ignoredElements: [],\n\n    /**\n     * Custom user key aliases for v-on\n     */\n    // $flow-disable-line\n    keyCodes: Object.create(null),\n\n    /**\n     * Check if a tag is reserved so that it cannot be registered as a\n     * component. This is platform-dependent and may be overwritten.\n     */\n    isReservedTag: no,\n\n    /**\n     * Check if an attribute is reserved so that it cannot be used as a component\n     * prop. This is platform-dependent and may be overwritten.\n     */\n    isReservedAttr: no,\n\n    /**\n     * Check if a tag is an unknown element.\n     * Platform-dependent.\n     */\n    isUnknownElement: no,\n\n    /**\n     * Get the namespace of an element\n     */\n    getTagNamespace: noop,\n\n    /**\n     * Parse the real tag name for the specific platform.\n     */\n    parsePlatformTagName: identity,\n\n    /**\n     * Check if an attribute must be bound using property, e.g. value\n     * Platform-dependent.\n     */\n    mustUseProp: no,\n\n    /**\n     * Perform updates asynchronously. Intended to be used by Vue Test Utils\n     * This will significantly reduce performance if set to false.\n     */\n    async: true,\n\n    /**\n     * Exposed for legacy reasons\n     */\n    _lifecycleHooks: LIFECYCLE_HOOKS\n  });\n\n  /*  */\n\n  var warn = noop;\n  var tip = noop;\n  var generateComponentTrace = (noop); // work around flow check\n  var formatComponentName = (noop);\n\n  {\n    var hasConsole = typeof console !== 'undefined';\n    var classifyRE = /(?:^|[-_])(\\w)/g;\n    var classify = function (str) { return str\n      .replace(classifyRE, function (c) { return c.toUpperCase(); })\n      .replace(/[-_]/g, ''); };\n\n    warn = function (msg, vm) {\n      var trace = vm ? generateComponentTrace(vm) : '';\n\n      if (hasConsole && (!config.silent)) {\n        console.error((\"[Vue warn]: \" + msg + trace));\n      }\n    };\n\n    tip = function (msg, vm) {\n      if (hasConsole && (!config.silent)) {\n        console.warn(\"[Vue tip]: \" + msg + (\n          vm ? generateComponentTrace(vm) : ''\n        ));\n      }\n    };\n\n    formatComponentName = function (vm, includeFile) {\n      if (vm.$root === vm) {\n        return '<Root>'\n      }\n      var options = typeof vm === 'function' && vm.cid != null\n        ? vm.options\n        : vm._isVue\n          ? vm.$options || vm.constructor.options\n          : vm;\n      var name = options.name || options._componentTag;\n      var file = options.__file;\n      if (!name && file) {\n        var match = file.match(/([^/\\\\]+)\\.vue$/);\n        name = match && match[1];\n      }\n\n      return (\n        (name ? (\"<\" + (classify(name)) + \">\") : \"<Anonymous>\") +\n        (file && includeFile !== false ? (\" at \" + file) : '')\n      )\n    };\n\n    var repeat = function (str, n) {\n      var res = '';\n      while (n) {\n        if (n % 2 === 1) { res += str; }\n        if (n > 1) { str += str; }\n        n >>= 1;\n      }\n      return res\n    };\n\n    generateComponentTrace = function (vm) {\n      if (vm._isVue && vm.$parent) {\n        var tree = [];\n        var currentRecursiveSequence = 0;\n        while (vm) {\n          if (tree.length > 0) {\n            var last = tree[tree.length - 1];\n            if (last.constructor === vm.constructor) {\n              currentRecursiveSequence++;\n              vm = vm.$parent;\n              continue\n            } else if (currentRecursiveSequence > 0) {\n              tree[tree.length - 1] = [last, currentRecursiveSequence];\n              currentRecursiveSequence = 0;\n            }\n          }\n          tree.push(vm);\n          vm = vm.$parent;\n        }\n        return '\\n\\nfound in\\n\\n' + tree\n          .map(function (vm, i) { return (\"\" + (i === 0 ? '---\x3e ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)\n              ? ((formatComponentName(vm[0])) + \"... (\" + (vm[1]) + \" recursive calls)\")\n              : formatComponentName(vm))); })\n          .join('\\n')\n      } else {\n        return (\"\\n\\n(found in \" + (formatComponentName(vm)) + \")\")\n      }\n    };\n  }\n\n  /*  */\n\n  var uid = 0;\n\n  /**\n   * A dep is an observable that can have multiple\n   * directives subscribing to it.\n   */\n  var Dep = function Dep () {\n    this.id = uid++;\n    this.subs = [];\n  };\n\n  Dep.prototype.addSub = function addSub (sub) {\n    this.subs.push(sub);\n  };\n\n  Dep.prototype.removeSub = function removeSub (sub) {\n    remove(this.subs, sub);\n  };\n\n  Dep.prototype.depend = function depend () {\n    if (Dep.target) {\n      Dep.target.addDep(this);\n    }\n  };\n\n  Dep.prototype.notify = function notify () {\n    // stabilize the subscriber list first\n    var subs = this.subs.slice();\n    for (var i = 0, l = subs.length; i < l; i++) {\n      subs[i].update();\n    }\n  };\n\n  // The current target watcher being evaluated.\n  // This is globally unique because only one watcher\n  // can be evaluated at a time.\n  Dep.target = null;\n\n  /*  */\n\n  var VNode = function VNode (\n    tag,\n    data,\n    children,\n    text,\n    elm,\n    context,\n    componentOptions,\n    asyncFactory\n  ) {\n    this.tag = tag;\n    this.data = data;\n    this.children = children;\n    this.text = text;\n    this.elm = elm;\n    this.ns = undefined;\n    this.context = context;\n    this.fnContext = undefined;\n    this.fnOptions = undefined;\n    this.fnScopeId = undefined;\n    this.key = data && data.key;\n    this.componentOptions = componentOptions;\n    this.componentInstance = undefined;\n    this.parent = undefined;\n    this.raw = false;\n    this.isStatic = false;\n    this.isRootInsert = true;\n    this.isComment = false;\n    this.isCloned = false;\n    this.isOnce = false;\n    this.asyncFactory = asyncFactory;\n    this.asyncMeta = undefined;\n    this.isAsyncPlaceholder = false;\n  };\n\n  var prototypeAccessors = { child: { configurable: true } };\n\n  // DEPRECATED: alias for componentInstance for backwards compat.\n  /* istanbul ignore next */\n  prototypeAccessors.child.get = function () {\n    return this.componentInstance\n  };\n\n  Object.defineProperties( VNode.prototype, prototypeAccessors );\n\n  /*\n   * not type checking this file because flow doesn't play well with\n   * dynamically accessing methods on Array prototype\n   */\n\n  var arrayProto = Array.prototype;\n  var arrayMethods = Object.create(arrayProto);\n\n  var methodsToPatch = [\n    'push',\n    'pop',\n    'shift',\n    'unshift',\n    'splice',\n    'sort',\n    'reverse'\n  ];\n\n  /**\n   * Intercept mutating methods and emit events\n   */\n  methodsToPatch.forEach(function (method) {\n    // cache original method\n    var original = arrayProto[method];\n    def(arrayMethods, method, function mutator () {\n      var args = [], len = arguments.length;\n      while ( len-- ) args[ len ] = arguments[ len ];\n\n      var result = original.apply(this, args);\n      var ob = this.__ob__;\n      var inserted;\n      switch (method) {\n        case 'push':\n        case 'unshift':\n          inserted = args;\n          break\n        case 'splice':\n          inserted = args.slice(2);\n          break\n      }\n      if (inserted) { ob.observeArray(inserted); }\n      // notify change\n      ob.dep.notify();\n      return result\n    });\n  });\n\n  /*  */\n\n  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);\n\n  /**\n   * In some cases we may want to disable observation inside a component's\n   * update computation.\n   */\n  var shouldObserve = true;\n\n  /**\n   * Observer class that is attached to each observed\n   * object. Once attached, the observer converts the target\n   * object's property keys into getter/setters that\n   * collect dependencies and dispatch updates.\n   */\n  var Observer = function Observer (value) {\n    this.value = value;\n    this.dep = new Dep();\n    this.vmCount = 0;\n    def(value, '__ob__', this);\n    if (Array.isArray(value)) {\n      if (hasProto) {\n        protoAugment(value, arrayMethods);\n      } else {\n        copyAugment(value, arrayMethods, arrayKeys);\n      }\n      this.observeArray(value);\n    } else {\n      this.walk(value);\n    }\n  };\n\n  /**\n   * Walk through all properties and convert them into\n   * getter/setters. This method should only be called when\n   * value type is Object.\n   */\n  Observer.prototype.walk = function walk (obj) {\n    var keys = Object.keys(obj);\n    for (var i = 0; i < keys.length; i++) {\n      defineReactive$$1(obj, keys[i]);\n    }\n  };\n\n  /**\n   * Observe a list of Array items.\n   */\n  Observer.prototype.observeArray = function observeArray (items) {\n    for (var i = 0, l = items.length; i < l; i++) {\n      observe(items[i]);\n    }\n  };\n\n  // helpers\n\n  /**\n   * Augment a target Object or Array by intercepting\n   * the prototype chain using __proto__\n   */\n  function protoAugment (target, src) {\n    /* eslint-disable no-proto */\n    target.__proto__ = src;\n    /* eslint-enable no-proto */\n  }\n\n  /**\n   * Augment a target Object or Array by defining\n   * hidden properties.\n   */\n  /* istanbul ignore next */\n  function copyAugment (target, src, keys) {\n    for (var i = 0, l = keys.length; i < l; i++) {\n      var key = keys[i];\n      def(target, key, src[key]);\n    }\n  }\n\n  /**\n   * Attempt to create an observer instance for a value,\n   * returns the new observer if successfully observed,\n   * or the existing observer if the value already has one.\n   */\n  function observe (value, asR