This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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 Closing a session means that licenses and keys associated with it are no longer valid for decrypting media data.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;
|Encrypted Media Extensions
The definition of 'closed' in that specification.
|Working Draft||Initial definition|
|Feature||Chrome||Edge||Firefox (Gecko)||Internet Explorer||Opera||Safari (WebKit)|
|Feature||Android Webview||Chrome for Android||Edge||Firefox Mobile (Gecko)||Firefox OS||IE Mobile||Opera Mobile||Safari Mobile|