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ServiceWorkerRegistration.waiting

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

The waiting property of the ServiceWorkerRegistration interface returns a service worker whose ServiceWorker.state is installed. This property is initially set to null.

Note: This feature is available in Web Workers.

sw = ServiceWorker.waiting

A ServiceWorker object, if it is currently in an installed state.

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

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	40	17 17 16 Disabled Disabled From version 16: this feature is behind the `Enable service workers` preference.	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