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

The MediaKeySession.closed read-only property returns a Promise signaling when a MediaKeySession closes. This promise can only be fulfilled and is never rejected. Closing a session means that licenses and keys associated with it are no longer valid for decrypting media data.


var promise = mediaKeySessionObj.closed;


A Promise.


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4213 ? ? Yes ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4342 Yes ? Yes ?4.0

Document Tags and Contributors

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