26 lines
670 B
JavaScript
26 lines
670 B
JavaScript
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export default class Notifications {
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constructor() {
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this._events = {};
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}
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on(event, callback) {
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!this._events[event] && (this._events[event] = []);
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this._events[event].push(callback);
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}
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off(event, callback) {
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if ( this._events[event] && this._events[event].includes(callback) ) {
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this._events[event].splice(this._events[event].indexOf(callback), 1);
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}
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}
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trigger(event/*, args*/) {
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if ( this._events[event] ) {
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this._events[event].forEach(callback => {
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callback.apply(this, Array.prototype.slice.call(arguments, 1));
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});
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}
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}
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}
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