Interface SubscribableOnce<T>

once

• once(listener: Listener<T>): Unsubscribe

  Subscribes and automatically unsubscribes on first event.

  Parameters

  • listener: Listener<T>

  Returns Unsubscribe
• once(): Promise<T>

  The next event is resolved as a fulfilled promise. (The promise will never be faulted.) If the event is never triggered, the promise will never resolve.

  Returns Promise<T>