Simple event bus in plain JS

event-bus.js

// Inspired by Vue: https://alligator.io/vuejs/global-event-bus/
// Sending events: EventBus.emit('clicky', clickArg);
// Receiving events: EventBus.on('clicky', clickArg => console.log(clickArg));

const EventBus = {
  events: {},
  emit(event, data) {
    if (!this.events[event]) {
      return;
    }
    this.events[event].forEach(callback => callback(data));
  },
  on(event, callback) {
    if (!this.events[event]) {
      this.events[event] = [];
    }
    this.events[event].push(callback);
  },
};

export default EventBus;