text: var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  };
  
  var classCallCheck = function (instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };
  
  var createClass = function () {
    function defineProperties(target, props) {
      for (var i = 0; i < props.length; i++) {
        var descriptor = props[i];
        descriptor.enumerable = descriptor.enumerable || false;
        descriptor.configurable = true;
        if ("value" in descriptor) descriptor.writable = true;
        Object.defineProperty(target, descriptor.key, descriptor);
      }
    }
  
    return function (Constructor, protoProps, staticProps) {
      if (protoProps) defineProperties(Constructor.prototype, protoProps);
      if (staticProps) defineProperties(Constructor, staticProps);
      return Constructor;
    };
  }();
  
  // Copyright Joyent, Inc. and other Node contributors.
  
  var R = (typeof Reflect === 'undefined' ? 'undefined' : _typeof(Reflect)) === 'object' ? Reflect : null;
  var ReflectApply = R && typeof R.apply === 'function' ? R.apply : function ReflectApply(target, receiver, args) {
    return Function.prototype.apply.call(target, receiver, args);
  };
  
  var ReflectOwnKeys;
  if (R && typeof R.ownKeys === 'function') {
    ReflectOwnKeys = R.ownKeys;
  } else if (Object.getOwnPropertySymbols) {
    ReflectOwnKeys = function ReflectOwnKeys(target) {
      return Object.getOwnPropertyNames(target).concat(Object.getOwnPropertySymbols(target));
    };
  } else {
    ReflectOwnKeys = function ReflectOwnKeys(target) {
      return Object.getOwnPropertyNames(target);
    };
  }
  
  function ProcessEmitWarning(warning) {
    if (console && console.warn) console.warn(warning);
  }
  
  var NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {
    return value !== value;
  };
  
  function EventEmitter() {
    EventEmitter.init.call(this);
  }
  var events = EventEmitter;
  
  // Backwards-compat with node 0.10.x
  EventEmitter.EventEmitter = EventEmitter;
  
  EventEmitter.prototype._events = undefined;
  EventEmitter.prototype._eventsCount = 0;
  EventEmitter.prototype._maxListeners = undefined;
  
  // By default EventEmitters will print a warning if more than 10 listeners are
  // added to it. This is a useful default which helps finding memory leaks.
  var defaultMaxListeners = 10;
  
  Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
    enumerable: true,
    get: function get$$1() {
      return defaultMaxListeners;
    },
    set: function set$$1(arg) {
      if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
        throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + '.');
      }
      defaultMaxListeners = arg;
    }
  });
  
  EventEmitter.init = function () {
  
    if (this._events === undefined || this._events === Object.getPrototypeOf(this)._events) {
      this._events = Object.create(null);
      this._eventsCount = 0;
    }
  
    this._maxListeners = this._maxListeners || undefined;
  };
  
  // Obviously not all Emitters should be limited to 10. This function allows
  // that to be increased. Set to zero for unlimited.
  EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
    if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
      throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + '.');
    }
    this._maxListeners = n;
    return this;
  };
  
  function $getMaxListeners(that) {
    if (that._maxListeners === undefined) return EventEmitter.defaultMaxListeners;
    return that._maxListeners;
  }
  
  EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
    return $getMaxListeners(this);
  };
  
  EventEmitter.prototype.emit = function emit(type) {
    var args = [];
    for (var i = 1; i < arguments.length; i++) {
      args.push(arguments[i]);
    }var doError = type === 'error';
  
    var events = this._events;
    if (events !== undefined) doError = doError && events.error === undefined;else if (!doError) return false;
  
    // If there is no 'error' event listener then throw.
    if (doError) {
      var er;
      if (args.length > 0) er = args[0];
      if (er instanceof Error) {
        // Note: The comments on the `throw` lines are intentional, they show
        // up in Node's output if this results in an unhandled exception.
        throw er; // Unhandled 'error' event
      }
      // At least give some kind of context to the user
      var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));
      err.context = er;
      throw err; // Unhandled 'error' event
    }
  
    var handler = events[type];
  
    if (handler === undefined) return false;
  
    if (typeof handler === 'function') {
      ReflectApply(handler, this, args);
    } else {
      var len = handler.length;
      var listeners = arrayClone(handler, len);
      for (var i = 0; i < len; ++i) {
        ReflectApply(listeners[i], this, args);
      }
    }
  
    return true;
  };
  
  function _addListener(target, type, listener, prepend) {
    var m;
    var events;
    var existing;
  
    if (typeof listener !== 'function') {
      throw new TypeError('The "listener" argument must be of type Function. Received type ' + (typeof listener === 'undefined' ? 'undefined' : _typeof(listener)));
    }
  
    events = target._events;
    if (events === undefined) {
      events = target._events = Object.create(null);
      target._eventsCount = 0;
    } else {
      // To avoid recursion in the case that type === "newListener"! Before
      // adding it to the listeners, first emit "newListener".
      if (events.newListener !== undefined) {
        target.emit('newListener', type, listener.listener ? listener.listener : listener);
  
        // Re-assign `events` because a newListener handler could have caused the
        // this._events to be assigned to a new object
        events = target._events;
      }
      existing = events[type];
    }
  
    if (existing === undefined) {
      // Optimize the case of one listener. Don't need the extra array object.
      existing = events[type] = listener;
      ++target._eventsCount;
    } else {
      if (typeof existing === 'function') {
        // Adding the second element, need to change to array.
        existing = events[type] = prepend ? [listener, existing] : [existing, listener];
        // If we've already got an array, just append.
      } else if (prepend) {
        existing.unshift(listener);
      } else {
        existing.push(listener);
      }
  
      // Check for listener leak
      m = $getMaxListeners(target);
      if (m > 0 && existing.length > m && !existing.warned) {
        existing.warned = true;
        // No error code for this since it is a Warning
        // eslint-disable-next-line no-restricted-syntax
        var w = new Error('Possible EventEmitter memory leak detected. ' + existing.length + ' ' + String(type) + ' listeners ' + 'added. Use emitter.setMaxListeners() to ' + 'increase limit');
        w.name = 'MaxListenersExceededWarning';
        w.emitter = target;
        w.type = type;
        w.count = existing.length;
        ProcessEmitWarning(w);
      }
    }
  
    return target;
  }
  
  EventEmitter.prototype.addListener = function addListener(type, listener) {
    return _addListener(this, type, listener, false);
  };
  
  EventEmitter.prototype.on = EventEmitter.prototype.addListener;
  
  EventEmitter.prototype.prependListener = function prependListener(type, listener) {
    return _addListener(this, type, listener, true);
  };
  
  function onceWrapper() {
    var args = [];
    for (var i = 0; i < arguments.length; i++) {
      args.push(arguments[i]);
    }if (!this.fired) {
      this.target.removeListener(this.type, this.wrapFn);
      this.fired = true;
      ReflectApply(this.listener, this.target, args);
    }
  }
  
  function _onceWrap(target, type, listener) {
    var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
    var wrapped = onceWrapper.bind(state);
    wrapped.listener = listener;
    state.wrapFn = wrapped;
    return wrapped;
  }
  
  EventEmitter.prototype.once = function once(type, listener) {
    if (typeof listener !== 'function') {
      throw new TypeError('The "listener" argument must be of type Function. Received type ' + (typeof listener === 'undefined' ? 'undefined' : _typeof(listener)));
    }
    this.on(type, _onceWrap(this, type, listener));
    return this;
  };
  
  EventEmitter.prototype.prependOnceListener = function prependOnceListener(type, listener) {
    if (typeof listener !== 'function') {
      throw new TypeError('The "listener" argument must be of type Function. Received type ' + (typeof listener === 'undefined' ? 'undefined' : _typeof(listener)));
    }
    this.prependListener(type, _onceWrap(this, type, listener));
    return this;
  };
  
  // Emits a 'removeListener' event if and only if the listener was removed.
  EventEmitter.prototype.removeListener = function removeListener(type, listener) {
    var list, events, position, i, originalListener;
  
    if (typeof listener !== 'function') {
      throw new TypeError('The "listener" argument must be of type Function. Received type ' + (typeof listener === 'undefined' ? 'undefined' : _typeof(listener)));
    }
  
    events = this._events;
    if (events === undefined) return this;
  
    list = events[type];
    if (list === undefined) return this;
  
    if (list === listener || list.listener === listener) {
      if (--this._eventsCount === 0) this._events = Object.create(null);else {
        delete events[type];
        if (events.removeListener) this.emit('removeListener', type, list.listener || listener);
      }
    } else if (typeof list !== 'function') {
      position = -1;
  
      for (i = list.length - 1; i >= 0; i--) {
        if (list[i] === listener || list[i].listener === listener) {
          originalListener = list[i].listener;
          position = i;
          break;
        }
      }
  
      if (position < 0) return this;
  
      if (position === 0) list.shift();else {
        spliceOne(list, position);
      }
  
      if (list.length === 1) events[type] = list[0];
  
      if (events.removeListener !== undefined) this.emit('removeListener', type, originalListener || listener);
    }
  
    return this;
  };
  
  EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
  
  EventEmitter.prototype.removeAllListeners = function removeAllListeners(type) {
    var listeners, events, i;
  
    events = this._events;
    if (events === undefined) return this;
  
    // not listening for removeListener, no need to emit
    if (events.removeListener === undefined) {
      if (arguments.length === 0) {
        this._events = Object.create(null);
        this._eventsCount = 0;
      } else if (events[type] !== undefined) {
        if (--this._eventsCount === 0) this._events = Object.create(null);else delete events[type];
      }
      return this;
    }
  
    // emit removeListener for all listeners on all events
    if (arguments.length === 0) {
      var keys = Object.keys(events);
      var key;
      for (i = 0; i < keys.length; ++i) {
        key = keys[i];
        if (key === 'removeListener') continue;
        this.removeAllListeners(key);
      }
      this.removeAllListeners('removeListener');
      this._events = Object.create(null);
      this._eventsCount = 0;
      return this;
    }
  
    listeners = events[type];
  
    if (typeof listeners === 'function') {
      this.removeListener(type, listeners);
    } else if (listeners !== undefined) {
      // LIFO order
      for (i = listeners.length - 1; i >= 0; i--) {
        this.removeListener(type, listeners[i]);
      }
    }
  
    return this;
  };
  
  function _listeners(target, type, unwrap) {
    var events = target._events;
  
    if (events === undefined) return [];
  
    var evlistener = events[type];
    if (evlistener === undefined) return [];
  
    if (typeof evlistener === 'function') return unwrap ? [evlistener.listener || evlistener] : [evlistener];
  
    return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
  }
  
  EventEmitter.prototype.listeners = function listeners(type) {
    return _listeners(this, type, true);
  };
  
  EventEmitter.prototype.rawListeners = function rawListeners(type) {
    return _listeners(this, type, false);
  };
  
  EventEmitter.listenerCount = function (emitter, type) {
    if (typeof emitter.listenerCount === 'function') {
      return emitter.listenerCount(type);
    } else {
      return listenerCount.call(emitter, type);
    }
  };
  
  EventEmitter.prototype.listenerCount = listenerCount;
  function listenerCount(type) {
    var events = this._events;
  
    if (events !== undefined) {
      var evlistener = events[type];
  
      if (typeof evlistener === 'function') {
        return 1;
      } else if (evlistener !== undefined) {
        return evlistener.length;
      }
    }
  
    return 0;
  }
  
  EventEmitter.prototype.eventNames = function eventNames() {
    return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
  };
  
  function arrayClone(arr, n) {
    var copy = new Array(n);
    for (var i = 0; i < n; ++i) {
      copy[i] = arr[i];
    }return copy;
  }
  
  function spliceOne(list, index) {
    for (; index + 1 < list.length; index++) {
      list[index] = list[index + 1];
    }list.pop();
  }
  
  function unwrapListeners(arr) {
    var ret = new Array(arr.length);
    for (var i = 0; i < ret.length; ++i) {
      ret[i] = arr[i].listener || arr[i];
    }
    return ret;
  }
  
  /**
   * Created by rocky on 2018/12/3.
   * @author rockywu<wjl19890427@hotmail.com>
   * 消息公共工厂
   */
  
  /**
   * Promise对象
   * @constructor
   */
  function Deferred() {
    var _this = this;
  
    this.promise = new Promise(function (resolve, reject) {
      _this.resolve = resolve;
      _this.reject = reject;
    });
  }
  
  // 计数器
  var count = 0;
  /**
   * 获取当前计数器
   * @returns {number}
   */
  function getId() {
    return count++;
  }
  
  /**
   * 初始化消息体
   */
  
  var MsgBody = function () {
    function MsgBody(options) {
      classCallCheck(this, MsgBody);
  
      Object.assign(this, {
        data: options.data || void 0, //指令传递的数据
        id: options.id === void 0 ? getId() : options.id, //指令计数器编号
        command: options.command || null, //指令名称
        reply: !!options.reply //是否需要等待回复
      });
    }
  
    createClass(MsgBody, [{
      key: "toObject",
      value: function toObject() {
        var _this2 = this;
  
        var rs = {};
        Object.keys(this).forEach(function (key) {
          rs[key] = _this2[key];
        });
        return rs;
      }
    }]);
    return MsgBody;
  }();
  
  /**
   * 获取事务标记
   * @param model
   */
  
  
  function getTransactionKey(model) {
    if (model instanceof MsgBody) {
      return model.command + "(" + model.id + ")";
    }
  }
  
  var SYNC_COMMAND = 'MP&WV:sync';
  
  /**
   * 消息对象,多端同时公用
   */
  function Messager(senderHandle) {
  
    var fn = {}; //对方提供的函数
    var transactions = {}; //事务集
    var callbacks = {}; //回调
    var needWait = []; //需要等待的事务
    var EE = new events(); //事件对象
  
  
    /**
     * 是否已经单向建立通信
     */
    function isConnect() {}
  
    /**
     * 绑定B端函数
     */
    function bind(name) {
      return function () {
        for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }
  
        return send(name, args);
      };
    }
  
    /**
     * 定义A端函数
     */
    function define(name, func) {
      callbacks[name] = function (args) {
        return func.call(void 0, args);
      };
      needWait && needWait.length == 0 && sync();
      return { define: define, bind: bind };
    }
  
    /**
     * 发送器
     */
    function sender(model) {
      var force = model.command === SYNC_COMMAND; // force send the message when the message is the sync message
      console.log("sender", force, needWait, model.toObject());
      if (!force && needWait && needWait.push) {
        needWait.push(model);
      } else {
        senderHandle(model.toObject());
      }
      EE.emit("send", model.toObject());
    }
  
    /**
     * 执行发送
     * @param command
     * @param data
     * @returns {Promise}
     */
    function send(command, data) {
      var body = new MsgBody({
        command: command,
        data: data,
        reply: false
      });
  
      var defer = new Deferred();
      transactions[getTransactionKey(body)] = defer;
      sender(body);
      return defer.promise;
    }
  
    /**
     * 尝试等待回复
     * @param data
     * @param result
     */
    function reply(model, result) {
      model.reply = true;
      model.data = result;
      console.log("reply", model.toObject());
      sender(model);
    }
  
    /**
     * 监听执行
     * @param data
     */
    function listener(data) {
      var model = new MsgBody(data);
      if (model.reply) {
        var key = getTransactionKey(model);
        transactions[key] && transactions[key].resolve(model.data);
        console.log("run-transactions", key, model.data);
      } else {
        if (callbacks[model.command]) {
          var result = callbacks[model.command](model.data);
          console.log("run-callback", result);
          if (result && result.then) {
            result.then(function (rs) {
              return reply(model, rs);
            });
          } else {
            reply(model, result);
          }
        } else {
          reply(model, null);
        }
      }
      /**
       * receive 添加事件
       */
      EE.emit('receive', model.toObject());
    }
  
    /**
     * 初始化
     */
    function initialize() {
      if (needWait && needWait.length) {
        var waiting = needWait;
        needWait = [];
        waiting.forEach(function (model) {
          sender(model);
        });
        /**
         * ready 添加事件
         */
        EE.emit('ready');
      }
    }
  
    /**
     * 添加绑定双向同步函数
     */
    var __sync = bind(SYNC_COMMAND);
    /**
     * 自定同步
     * @param defines
     * @returns {Array}
     * @private
     */
    function _sync(defines) {
      console.log("_sync", defines);
      if (defines === void 0) {
        defines = [];
      }
      defines.filter(function (def) {
        return !(def in fn);
      }).map(function (key) {
        console.log("map", key);
        fn[key] = bind(key);
      });
      initialize();
      return Object.keys(callbacks);
    }
  
    define(SYNC_COMMAND, function (data) {
      console.log("777", data);
      _sync(data[0]);
    });
  
    /**
     * 执行异步
     */
    function sync() {
      __sync(Object.keys(callbacks)).then(function (res) {
        console.log("---", res);
        return _sync(res);
      });
    }
  
    return {
      bind: bind,
      define: define,
      isConnect: isConnect,
      listener: listener,
      ready: sync,
      fn: fn,
      on: EE.on, //添加监听
      off: EE.off //添加监听
    };
  }
  
  function invoke (webViewContext) {
    var _ref = new Messager(function (data) {
      console.log("isNative", data);
      data.isNative = 999;
      webViewContext && webViewContext.postMessage && webViewContext.postMessage(data);
    }),
        bind = _ref.bind,
        define = _ref.define,
        listener = _ref.listener,
        fn = _ref.fn,
        on = _ref.on,
        off = _ref.off,
        isConnect = _ref.isConnect;
    //
    //   let postMessage = webViewContext.postMessage
    //   const descriptor = {
    //   get: function() {
    //     return postMessage;
    //   },
    //   set: function(value) {
    //     postMessage = value;
    //     if(postMessage) {
    //       console.log("can-ready")
    //       setTimeout(ready, 50);
    //     }
    //   }
    // }
    // Object.defineProperty(webViewContext, 'postMessage', descriptor)
  
  
    return {
      bind: bind,
      define: define,
      fn: fn,
      listener: listener,
      on: on,
      off: off,
      isConnect: isConnect
    };
  }
  
  /**
   * Created by rocky on 2018/11/30.
   */
  
  export default invoke;
  