The periodicsync
event of the ServiceWorkerGlobalScope
interface is fired at timed intervals, specified when registering a PeriodicSyncManager
.
This event is not cancelable and does not bubble.
The periodicsync
event of the ServiceWorkerGlobalScope
interface is fired at timed intervals, specified when registering a PeriodicSyncManager
.
This event is not cancelable and does not bubble.
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('periodicsync', event => { }); onperiodicsync = event => { };
An PeriodicSyncEvent
. Inherits from Event
.
Inherits properties from its ancestor, Event
.
PeriodicSyncEvent.tag
Read only
Returns the developer-defined identifier for this PeriodicSyncEvent
. Multiple tags can be used by the web app to run different periodic tasks at different frequencies.
The following example shows how to respond to a periodic sync event in the service worker.
self.addEventListener('periodicsync', event => { if (event.tag == 'get-latest-news') { event.waitUntil(fetchAndCacheLatestNews()); } });
You can also set up the event handler using the onperiodicsync
property:
self.onperiodicsync = (event) => { ... };
Specification |
---|
Web Periodic Background Synchronization # periodicsync-event |
Web Periodic Background Synchronization # dom-serviceworkerglobalscope-onperiodicsync |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
periodicsync_event |
80
|
80
|
No
|
No
|
67
|
No
|
No
|
80
|
No
|
57
|
No
|
13.0
|
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https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/periodicsync_event