function addEventListener

Registers an event listener in the global scope, which will be called synchronously whenever the event type is dispatched.

addEventListener('unload', () => { console.log('All finished!'); });
...
dispatchEvent(new Event('unload'));

Parameters

type: K[src]
listener: (this: Window, ev: WindowEventMap[K]) => any[src]
optional
options: boolean | AddEventListenerOptions
[src]