W3cubDocs

/DOM

ServiceWorkerGlobalScope.onsync

The ServiceWorkerGlobalScope.onsync event of the ServiceWorkerGlobalScope interface is fired whenever a SyncEvent event occurs. This is triggered when a call to SyncManager.register is made from a service worker client page. The attempt to sync is made either immediately if the network is available or as soon as the network becomes available.

Syntax

ServiceWorkerGlobalScope.onsync = function(SyncEvent) { ... }
self.addEventListener('sync', function(SyncEvent) { ... })

Specifications

Specification Status Comment
Web Background Synchronization
The definition of 'onsync' in that specification.
Living Standard Adds the onsync event.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 49 ? 44
44
Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
No 24 11.1
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 49 49 ? 44 24 11.1 5.0

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/onsync