Web/API/MediaSessionActionDetails/seekOffset

The MediaSessionActionDetails dictionary's seekOffset property is an optional value passed into the action handler callback to provide the number of seconds the seekforward and seekbackward actions should move the playback time by.

Syntax

let mediaSessionActionDetails = { seekOffset: deltaTimeInSeconds };

let deltaTime = mediaSessionActionDetails.seekOffset;

Value

A floating-point value indicating the time delta in seconds by which to move the playback position relative to its current timestamp. If the offset isn't specified, the user agent will choose an appropriate offset automatically. This is typically in the range of five to ten seconds.

Specifications

Specification	Status	Comment
Media Session StandardThe definition of 'MediaSessionActionDetails.seekOffset' in that specification.	Draft	Initial definition.

Browser compatibility

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
`seekOffset` Experimental'	Chrome Full support 73	Edge Full support ≤79	Firefox Full support 76 Disabled' Full support 76 Disabled' Disabled' From version 76: this feature is behind the `dom.media.mediasession.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE ?	Opera No support No	Safari ?	WebView Android No support No	Chrome Android Full support 57	Firefox Android No support No	Opera Android No support No	Safari iOS ?	Samsung Internet Android Full support 7.0

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.
User must explicitly enable this feature.': User must explicitly enable this feature.