@woleet/woleet-widgetv2/src/common/patterns/event-observer.js

Woleet web widgets V2

/**
 * Event Observer pattern
 * It's used for communication between the widget components
 */
class EventObserver {
  constructor() {
    this.observers = [];
  }

  // Subscribe on events
  subscribe(fn) {
    this.observers.push(fn);
  }

  // Unsubscribe from events
  unsubscribe(fn) {
    this.observers = this.observers.filter(subscriber => subscriber !== fn);
  }

  // Broadcast an event
  broadcast(data, ...args) {
    this.observers.forEach(subscriber => subscriber(data, ...args));
  }
}

export default EventObserver;