This article needs a technical review. How you can help.

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The tag read-only property of the SyncRegistration interface provides the unique identifier of the specified SyncRegistration object.


​var myRegistrationID = SyncRegistration.tag;

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support Not supported ? ? ? ?
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support Not supported ? ? ? ? ? Not supported

Document Tags and Contributors

 Contributors to this page: jpmedley, Sheppy
 Last updated by: jpmedley,