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.

Value

This code checks if the browser supports service workers.

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

Specification
Service Workers 1 # navigator-service-worker-attribute

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`serviceWorker`	40	17	44 Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.	No	27	11.1	40	40	44	27	11.3	4.0