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

The MediaKeySession.sessionId read-only property contains a unique string generated by the CDM for the current media object and its associated keys or licenses.


​var sessionId = mediaKeySessionObj.sessionId;


Specification Status Comment
Encrypted Media Extensions
The definition of 'sessionId' in that specification.
Recommendation Initial definition

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 42.0 (Yes) ? ? ? ?
Feature Android Android Webview Edge Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support 43.0 (Yes) ? ? ? ? ? 42.0

Document Tags and Contributors

 Contributors to this page: libbymc, rolfedh, Sebastianz, jpmedley
 Last updated by: libbymc,