This is an experimental technology
Check 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 Extensions The 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.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
expiration | Chrome Full support 42 | Edge Full support 13 | Firefox Full support Yes | IE ? | 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
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.