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

The id read-only property of the Client interface returns the universally unique identifier of the Client object.


var clientId = Client.id;




Specification Status Comment
Service Workers
The definition of 'id' in that specification.
Working Draft Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support40 ?441 No27 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4040 ?4427 No ?

1. Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, jpmedley, kscarfone
 Last updated by: fscholz,