| 1 | // for document only
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| 2 | // SDK uses https://www.npmjs.com/package/eventemitter3
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| 3 |
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| 4 | /**
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| 5 | * @class EventEmitter
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| 6 | * @private
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| 7 | */
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| 8 |
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| 9 | /**
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| 10 | * 给指定的 event 添加监听器，并将该监听器置于监听器列表的末位。该方法不会检查是否已经添加过该监听器。重复添加相同的 event 和 listener 会导致该事件和监听器被重复触发。
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| 11 | *
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| 12 | * @function on
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| 13 | * @memberof EventEmitter.prototype
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| 14 | * @param {String|Symbol} event The event name.
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| 15 | * @param {Function} listener The listener function.
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| 16 | * @param {Mixed} [context=this] The context to invoke the listener with.
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| 17 | * @returns {this} self.
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| 18 | */
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| 19 |
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| 20 | /**
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| 21 | * 为 event 事件添加一个一次性的监听器，该事件第一次触发之后就会被注销。
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| 22 | *
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| 23 | * @function once
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| 24 | * @memberof EventEmitter.prototype
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| 25 | * @param {String|Symbol} event The event name.
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| 26 | * @param {Function} listener The listener function.
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| 27 | * @param {Mixed} [context=this] The context to invoke the listener with.
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| 28 | * @returns {this} self.
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| 29 | */
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| 30 |
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| 31 | /**
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| 32 | * 移除 event 事件的监听器列表中的 listener。
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| 33 | *
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| 34 | * @function off
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| 35 | * @memberof EventEmitter.prototype
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| 36 | * @param {String|Symbol} event The event name.
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| 37 | * @param {Function} [listener] Only remove the listeners that match this function.
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| 38 | * @param {Mixed} [context] Only remove the listeners that have this context.
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| 39 | * @param {Boolean} [once] Only remove one-time listeners.
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| 40 | * @returns {this} self.
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| 41 | */
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| 42 |
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| 43 | /**
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| 44 | * 依次调用 event 事件的监听器列表中的 listener。
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| 45 | *
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| 46 | * @function emit
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| 47 | * @memberof EventEmitter.prototype
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| 48 | * @param {String|Symbol} event The event name.
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| 49 | * @param {Mixed} [...arg] payloads
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| 50 | * @returns {Boolean} `true` if the event had listeners, else `false`.
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| 51 | */
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