addOnce Method
Registers a callback function to be executed only once when the event is raised.
addOnce(listener: T extends Listener, scope?: any): () => void
see BeEvent.raiseEvent, BeEvent.removeListener
Parameter | Type | Description |
---|---|---|
listener | T extends Listener | The function to be executed once when the event is raised. |
scope | any | An optional object scope to serve as the this pointer in which the listener function will execute. |
Returns - A function that will remove this event listener.
Defined in
Last Updated: 23 April, 2020