Method getInstance

src/utils/event-emitter.ts:11–16

()

  private constructor() {}

  public static getInstance(): EventEmitter {
    if (!EventEmitter.instance) {
      EventEmitter.instance = new EventEmitter();
    }
    return EventEmitter.instance;
  }

  on(eventName: EventType, callback: Callback) {
    if (!this.events[eventName]) {