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ServiceWorkerRegistration.active

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

The active property of the ServiceWorkerRegistration interface returns a service worker whose ServiceWorker.state is activating or activated. This property is initially set to null.

An active worker controls a ServiceWorkerClient if the client's URL falls within the scope of the registration (the scope option set when ServiceWorkerContainer.register is first called.)

Note: This feature is available in Web Workers.

Syntax

sw = ServiceWorker.active

Value

A ServiceWorker object, if it is currently in an activating or activated state.

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

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 11.1
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 40 40 ? 44 27 11.1 4.0

See also

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https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/active