ascor/lib/cjs/utils/EventEmitter.js

一些常用的简单的js工具

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventEmitter = void 0;
var EventEmitter = /** @class */ (function () {
    function EventEmitter() {
        this.eventCallback = {};
    }
    /**
     * 添加事件
     * @param event 事件名称，字符串
     * @param cb 事件回调函数
     * @returns EventEmitter
     */
    EventEmitter.prototype.on = function (event, cb) {
        var callbackList = this.eventCallback[event] || [];
        callbackList.push(cb);
        this.eventCallback[event] = callbackList;
        return this;
    };
    /**
     * 取消监听事件
     * @param event 事件名称
     * @param cb 事件回调函数,不传则取消所有
     * @returns
     */
    EventEmitter.prototype.off = function (event, cb) {
        if (!cb) {
            this.eventCallback[event] = [];
            return this;
        }
        var callbackList = this.eventCallback[event] || [];
        this.eventCallback[event] = callbackList.filter(function (fn) { return fn !== cb; });
        return this;
    };
    /**
     * 发送事件
     * @param event 事件名称，字符串
     * @param args 触发时间传递的参数
     * @returns
     */
    EventEmitter.prototype.emit = function (event) {
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        var callbackList = this.eventCallback[event] || [];
        callbackList.forEach(function (fn) {
            fn.apply(void 0, args);
        });
        return this;
    };
    /**
     * 仅触发一次事件，执行完后自动去掉监听
     * @param event 事件名称
     * @param cb 回调函数
     * @returns
     */
    EventEmitter.prototype.once = function (event, cb) {
        var _this = this;
        // 封装一个单次执行函数
        var fn = function () {
            var args = [];
            for (var _i = 0; _i < arguments.length; _i++) {
                args[_i] = arguments[_i];
            }
            cb.apply(_this, args);
            _this.off(event, fn);
        };
        this.on(event, fn);
        return this;
    };
    return EventEmitter;
}());
exports.EventEmitter = EventEmitter;