This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The activeWorker
read-only property of the InstallEvent
interface returns the ServiceWorker
that is currently actively controlling the page.
This will return null
if no active worker is already controlling the page.
Syntax
var myActiveWorker = event.activeWorker
Value
A ServiceWorker
object.
Examples
self.addEventListener('install', function(event) { var myActiveWorker = event.activeWorker; });
Specifications
Specification | Status | Comment |
---|---|---|
Service Workers The definition of 'InstallEvent' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 40.0 | 44.0 (44.0)[1] | No support | 24 | No support |
Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | ? | 44.0 (44.0) | (Yes) | No support | ? | No support | 40.0 |
[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)