Web/API/MediaKeySession/expiration

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

The MediaKeySession.expiration read-only property returns the time after which the keys in the current session can no longer be used to decrypt media data, or NaN if no such time exists. This value is determined by the CDM and measured in milliseconds since January 1, 1970, UTC. This value may change during a session lifetime, such as when an action triggers the start of a window.

Syntax

​var expirationTime = mediaKeySessionObj.expiration;

Specifications

Specification	Status	Comment
Encrypted Media ExtensionsThe definition of 'expiration' in that specification.	Recommendation	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
expiration Experimental'	Chrome Full support 42	Edge Full support 13	Firefox Full support Yes	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support 43	Chrome Android Full support 42	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 4.0

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

expiration by Mozilla Contributors is licensed under CC-BY-SA 2.5.