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

The setActionHandler() property of the MediaSession interface sets an event handler for a media session action.


navigator.mediaSession.setActionHandler(type, callback)


A string representing an action type to listen for. It will be one of play, pause, seekbackward, seekforward, previoustrack, or nexttrack.
Indicates the function to call when the specified action type is invoked. This is a void function, with no parameters.




The following example creates a new media session and assigns action handlers to it:

if ('mediaSession' in navigator){
  navigator.mediaSession.metadata = new MediaMetadata({
    title: "Podcast Episode Title",
    artist: "Podcast Host",
    album: "Podcast Name",
    artwork: [{src: "podcast.jpg"}]
  navigator.mediaSession.setActionHandler('play', function() {});
  navigator.mediaSession.setActionHandler('pause', function() {});
  navigator.mediaSession.setActionHandler('seekbackward', function() {});
  navigator.mediaSession.setActionHandler('seekforward', function() {});
  navigator.mediaSession.setActionHandler('previoustrack', function() {});
  navigator.mediaSession.setActionHandler('nexttrack', function() {});

This example uses appropriate action handlers to allow seeking in either direction through the playing media.

let skipTime = 10 // Time to skip in seconds

navigator.mediaSession.setActionHandler('seekbackward', evt => {
  // User clicked "Seek Backward" media notification icon.
  audio.currentTime = Math.max(audio.currentTime - skipTime, 0)

navigator.mediaSession.setActionHandler('seekforward', evt => {
  // User clicked "Seek Forward" media notification icon.
  audio.currentTime = Math.min(audio.currentTime + skipTime,    

To unset a media action handler, assign it to null.

navigator.mediaSession.setActionHandler('nexttrack', null);


Specification Status Comment
Media Session Standard
The definition of 'setActionHandler()' in that specification.
Draft Initial definition.

Browser Compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome Full support 73Edge ? Firefox ? IE ? Opera No support NoSafari ? WebView Android No support NoChrome Android Full support 57Firefox Android ? Opera Android No support NoSafari iOS ? Samsung Internet Android ?


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.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.