Simple event bus in Client side JS

EventBus.js

// Source: https://itnext.io/handling-data-with-web-components-9e7e4a452e6e

class EventBus {
  constructor() {
    this._bus = document.createElement('div');
  }

  register(event, callback) {
    this._bus.addEventListener(event, callback);
  } 
    
  remove(event, callback) {
    this._bus.removeEventListener(event, callback);
  }
  fire(event, detail = {}) {
    this._bus.dispatchEvent(new CustomEvent(event, { detail }));
  }
}