WorkerNavigator: serviceWorker property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is only available in Web Workers.

The serviceWorker read-only property of the WorkerNavigator interface 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.

Value

This code checks if the browser supports using service worker in workers.

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

Specification
Service Workers Nightly # navigator-serviceworker

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`serviceWorker`	Chrome – No support Chrome footnote footnote See bug 40364838	Edge – No support Edge footnote footnote See bug 40364838	Firefox – Full support Firefox 133 (Release date: 2024-11-26) footnote Full support	Opera – No support Opera footnote footnote See bug 40364838	Safari – Full support Safari 11.1 (Release date: 2018-04-12) footnote Full support	Chrome Android – No support Chrome Android footnote footnote See bug 40364838	Firefox for Android – Full support Firefox for Android 133 (Release date: 2024-11-26) footnote Full support	Opera Android – No support Opera Android footnote footnote See bug 40364838	Safari on iOS – Full support Safari on iOS 11.3 (Release date: 2018-03-29) footnote Full support	Samsung Internet – No support Samsung Internet footnote footnote See bug 40364838	WebView Android – No support WebView Android footnote footnote See bug 40364838	WebView on iOS – No support WebView on iOS footnote No support

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