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FetchEvent.constructor

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The FetchEvent() constructor creates a new FetchEvent object.

var myFetchEvent = new FetchEvent(type, init);

type

The type of the Event.

init Optional

An options object containing any custom settings that you want to apply to the event object. Options are as follows:

request: The Request object that would have triggered the event handler.
clientId: The Client that the current service worker is controlling. This property is not yet implemented in Chrome.
isReload: A Boolean that signifies whether the page was reloaded or not when the event was dispatched. true if yes, and false if not. Typically, pressing the refresh button in a browser is a reload, while clicking a link and pressing the back button is not. If not present, it defaults to false.

Specification	Status	Comment
Service Workers The definition of 'FetchEvent' in that specification.	Working Draft	Initial definition.

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	40	Yes	44 44 Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)	No	27	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	40	40	?	44	27	No	4.0