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.
var myActiveWorker = event.activeWorker
A ServiceWorker object.
self.addEventListener('install', function(event) {
var myActiveWorker = event.activeWorker;
}); | Specification | Status | Comment |
|---|---|---|
| Service Workers The definition of 'InstallEvent' in that specification. | Editor's Draft | Initial definition. |
| 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.)
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/InstallEvent/activeWorker