@hiddentao/clockwork-engine/dist/EventEmitter.js

A TypeScript/PIXI.js game engine for deterministic, replayable games with built-in rendering

export class EventEmitter {
    constructor() {
        this.listeners = {};
    }
    on(event, callback) {
        if (!this.listeners[event]) {
            this.listeners[event] = new Set();
        }
        this.listeners[event]?.add(callback);
    }
    off(event, callback) {
        this.listeners[event]?.delete(callback);
    }
    emit(event, ...args) {
        this.listeners[event]?.forEach((callback) => callback(...args));
    }
    clearListeners() {
        for (const key in this.listeners) {
            if (this.listeners[key]) {
                this.listeners[key]?.clear();
            }
        }
    }
}