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'));


function addEventListener<K extends keyof WindowEventMap>(
type: K,

listener: (this: Window, ev: WindowEventMap[K]) => any,

options?: boolean | AddEventListenerOptions,
): void;

function addEventListener(
type: string,

listener: EventListenerOrEventListenerObject,

options?: boolean | AddEventListenerOptions,
): void;

addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void

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'));

Type Parameters

K extends keyof WindowEventMap

Parameters

type: K

listener: (this: Window, ev: WindowEventMap[K]) => any

options?: boolean | AddEventListenerOptions optional

Return Type

void

addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void

Parameters

type: string

listener: EventListenerOrEventListenerObject

options?: boolean | AddEventListenerOptions optional

Return Type

void