class EventBus {
constructor() {
this.events = {};
}
static instance() {
return new EventBus()
}
on(eventName, callback) {
if (!this.events[eventName]) {
this.events[eventName] = [];
}
this.events[eventName].push(callback);
}
off(eventName, callback) {
if (this.events[eventName]) {
this.events[eventName] = this.events[eventName].filter(cb => cb !== callback);
}
}
emit(eventName, ...args) {
if (this.events[eventName]) {
this.events[eventName].forEach(callback => callback(...args));
}
}
}
export const eventbus = (() => EventBus.instance())()
