The active
property of the ServiceWorkerRegistration
interface returns a service worker whose ServiceWorker.state
is activating
or activated
. This property is initially set to null
.
An active worker controls a ServiceWorkerClient
if the client's URL falls within the scope of the registration (the scope
option set when ServiceWorkerContainer.register
is first called.)
Note: This feature is available in Web Workers.
Note: Once an active worker is activating
, neither a runtime script error nor a force termination of the active worker prevents the active worker from getting activated
.
Syntax
var serviceWorker = serviceWorkerRegistration.active;
Value
A ServiceWorker
object's property, if it is currently in an activating
or activated
state.
Specifications
Specification | Status | Comment |
Service WorkersThe definition of 'ServiceWorkerRegistration.active' in that specification. | Working Draft | Initial definition.
|
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome
Full support 40 |
Edge Full support 17 Full support 17 Full support 16 Disabled' From version 16: this feature is behind the |
Firefox Full support 44 Full support 44 Notes' Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API. |
IE
No support No |
Opera
Full support 27 |
Safari
Full support 11.1 |
WebView Android
Full support 40 |
Chrome Android
Full support 40 |
Firefox Android
Full support 44 |
Opera Android
Full support 27 |
Safari iOS
Full support 11.3 |
Samsung Internet Android
Full support 4.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
- See implementation notes.'
- See implementation notes.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
See also
- Using Service Workers
- Service workers basic code example
- Is ServiceWorker ready?
Promise
- Using web workers
ServiceWorkerRegistration.active by Mozilla Contributors is licensed under CC-BY-SA 2.5.