This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The SyncEvent.tag read-only property of the SyncEvent interface returns the developer-defined identifier for this SyncEvent. This is the value passed in the tag parameter of the SyncEvent() constructor.


var tag = SyncEvent.tag


The developer-defined identifier for this SyncEvent.


Specification Status Comment
Web Background Synchronization
The definition of 'tag' in that specification.
Living Standard Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support49 ? ? ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No49 ? ? ? ?5.0

Document Tags and Contributors

Contributors to this page: fscholz, rolfedh, jpmedley
Last updated by: fscholz,