InstallEvent.activeWorker
Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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; });
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
activeWorker |
40 |
≤79 |
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
|
No |
27 |
No |
40 |
40 |
44 |
27 |
No |
4.0 |
See also
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https://developer.mozilla.org/en-US/docs/Web/API/InstallEvent/activeWorker