@bytedance/mona-client-web/dist/EventEmitter.js

web for mona

var MONA_EVENTEMITTER_LISTENER = '__MONA_EVENTEMITTER_LISTENER';
var EventEmitter = /** @class */ (function () {
    function EventEmitter() {
        this.listeners = window[MONA_EVENTEMITTER_LISTENER] || {};
    }
    EventEmitter.prototype._refreshListeners = function () {
        this.listeners = window[MONA_EVENTEMITTER_LISTENER] || {};
    };
    EventEmitter.prototype._updateListeners = function (key, arr) {
        this.listeners[key] = arr;
        window[MONA_EVENTEMITTER_LISTENER] = this.listeners;
    };
    EventEmitter.prototype.on = function (key, listener) {
        this._refreshListeners();
        var arr = this.listeners[key] || [];
        arr.push(listener);
        this._updateListeners(key, arr);
    };
    EventEmitter.prototype.off = function (key, listener) {
        this._refreshListeners();
        var arr = this.listeners[key] || [];
        var index = arr.indexOf(listener);
        if (index !== -1) {
            arr.splice(index, 1);
            this._updateListeners(key, arr);
        }
    };
    EventEmitter.prototype.emit = function (key) {
        var args = [];
        for (var _i = 1; _i < arguments.length; _i++) {
            args[_i - 1] = arguments[_i];
        }
        this._refreshListeners();
        var arr = this.listeners[key] || [];
        arr.forEach(function (listener) {
            if (typeof listener === 'function') {
                listener.apply(void 0, args);
            }
        });
    };
    EventEmitter.prototype.clear = function () {
        this.listeners = window[MONA_EVENTEMITTER_LISTENER] = {};
    };
    return EventEmitter;
}());
export default EventEmitter;
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