27 lines
532 B
JavaScript
27 lines
532 B
JavaScript
export class EventEmitter {
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static instance;
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events;
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constructor() {
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if (!EventEmitter.instance) {
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EventEmitter.instance = this;
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this.events = {};
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}
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return EventEmitter.instance;
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}
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on(eventName, callback) {
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if (!this.events[eventName]) {
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this.events[eventName] = [];
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}
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this.events[eventName].push(callback);
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}
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emit(eventName, ...args) {
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if (this.events[eventName]) {
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this.events[eventName].forEach((callback) => {
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callback(...args);
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});
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}
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}
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}
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