addWeakEventListener - API / NativeScript

function addWeakEventListener(
   source: Observable, 
   eventName: string, 
   handler: (eventData: EventData) => void, 
   target: any): void;

Attaches a WeakEventListener.

Parameters

Parameter	Type	Description
`source`	`Observable`	Observable class which emits the event.
`eventName`	`string`	The event name.
`handler`	(`eventData`: `EventData`) => `void`	The function which should be called when event occurs.
`target`	`any`	Subscriber (target) of the event listener. It will be used as a thisArg in the handler function.

void