The activate
event of the ServiceWorkerGlobalScope
interface is fired when a ServiceWorkerRegistration
acquires a new ServiceWorkerRegistration.active
worker.
This event is not cancelable and does not bubble.
The activate
event of the ServiceWorkerGlobalScope
interface is fired when a ServiceWorkerRegistration
acquires a new ServiceWorkerRegistration.active
worker.
This event is not cancelable and does not bubble.
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('activate', event => { }); onactivate = event => { };
An ExtendableEvent
. Inherits from Event
.
Doesn't implement any specific properties, but inherits properties from its parent, Event
.
The following snippet shows how you could use an activate
event handler to upgrade a cache.
globalScope.addEventListener('activate', function(event) { var cacheAllowlist = ['v2']; event.waitUntil( caches.forEach(function(cache, cacheName) { if (cacheAllowlist.indexOf(cacheName) == -1) { return caches.delete(cacheName); } }) ); });
You can also set up the event handler using the onactivate
property:
globalScope.onactivate = function(event) { ... };
Specification |
---|
Service Workers 1 # service-worker-global-scope-activate-event |
Service Workers 1 # dom-serviceworkerglobalscope-onactivate |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
activate_event |
40
|
17
|
44
Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
|
No
|
24
|
11.1
|
40
|
40
|
44
|
24
|
11.3
|
4.0
|
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/activate_event