The activate
event of the ServiceWorkerGlobalScope
interface is fired when a ServiceWorkerRegistration
acquires a new ServiceWorkerRegistration.active
worker.
Bubbles | No |
---|---|
Cancelable | No |
Interface | ExtendableEvent |
Event handler property | ServiceWorkerGlobalScope.onactivate |
Examples
The following snippet shows how you could use an activate
event handler to upgrade a cache.
globalScope.addEventListener('activate', function(event) { var cacheWhitelist = ['v2']; event.waitUntil( caches.forEach(function(cache, cacheName) { if (cacheWhitelist.indexOf(cacheName) == -1) { return caches.delete(cacheName); } }) ); });
You can also set up the event handler using the ServiceWorkerGlobalScope.onactivate
property:
globalScope.onactivate = function(event) { ... };
Specifications
Specification | Status | Comment |
---|---|---|
Service Workers The definition of 'activate' in that specification. |
Working Draft |
Browser compatibility
The compatibility table on 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
activate event | Chrome Full support 40 | Edge Full support โค79 | Firefox
Full support
44
| IE No support No | Opera Full support 24 | Safari Full support 11.1 | WebView Android Full support 40 | Chrome Android Full support 40 | Firefox Android Full support 44 | Opera Android Full support 24 | 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.