32 lines
720 B
JavaScript
32 lines
720 B
JavaScript
class EventEmitterSingleton {
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static instance;
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eventEmitter;
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constructor() {
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this.eventEmitter = {};
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}
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static getInstance() {
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if (!EventEmitterSingleton.instance) {
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EventEmitterSingleton.instance = new EventEmitterSingleton();
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}
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return EventEmitterSingleton.instance;
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}
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on(eventName, callback) {
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if (!this.eventEmitter[eventName]) {
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this.eventEmitter[eventName] = [];
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}
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this.eventEmitter[eventName].push(callback);
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}
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emit(eventName, ...args) {
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if (this.eventEmitter[eventName]) {
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this.eventEmitter[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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export const eventEmitter = EventEmitterSingleton.getInstance();
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