@bernotieno/mini-framework/src/utils/events.js

A lightweight JavaScript framework built from scratch with zero dependencies

/**
 * Event Utilities
 * Simple event bus for component communication
 */

export class EventBus {
  constructor() {
    this.events = {};
  }

  on(event, callback) {
    if (!this.events[event]) {
      this.events[event] = [];
    }
    this.events[event].push(callback);
    
    return () => {
      const index = this.events[event].indexOf(callback);
      if (index > -1) {
        this.events[event].splice(index, 1);
      }
    };
  }

  emit(event, data) {
    if (this.events[event]) {
      this.events[event].forEach(callback => callback(data));
    }
  }

  off(event, callback) {
    if (this.events[event]) {
      const index = this.events[event].indexOf(callback);
      if (index > -1) {
        this.events[event].splice(index, 1);
      }
    }
  }
}