Navigator.serviceWorker

The Navigator.serviceWorker read-only property returns the ServiceWorkerContainer object for the associated document, which provides access to registration, removal, upgrade, and communication with the ServiceWorker.

The feature may not be available in private mode.

Syntax

var workerContainerInstance = navigator.serviceWorker;

This code checks if the browser supports service workers.

if ('serviceWorker' in navigator) {
  // Supported!
}

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

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`serviceWorker`	Chrome Full support 40	Edge Full support 17 Full support 17 Full support 16 Disabled Disabled From version 16: this feature is behind the `Enable service workers` preference.	Firefox Full support 44 Notes Full support 44 Notes Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).	IE No support No	Opera Full support 27	Safari Full support 11.1	WebView Android Full support 40	Chrome Android Full support 40	Firefox Android Full support 44	Opera Android Full support 27	Safari iOS Full support 11.3	Samsung Internet Android Full support 4.0

Full support: Full support
No support: No support
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.