MediaSession

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

The MediaSession interface of the Media Session API allows a web page to provide custom behaviors for standard media playback interactions, and to report metadata that can be sent by the user agent to the device or operating system for presentation in standardized user interface elements.

For example, a smartphone might have a standard panel in its lock screen that provides controls for media playback and information display. A browser on the device can use MediaSession to make browser playback controllable from that standard/global user interface.

Properties

metadata
Returns an instance of MediaMetadata, which contains rich media metadata for display in a platform UI.
playbackState
Indicates whether the current media session is playing. Valid values are none, paused, or playing.

Methods

setActionHandler()
Sets an action handler for a media session action, such as play or pause.
setPositionState()
Sets the current playback position and speed of the media currently being presented.

Examples

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

if ('mediaSession' in navigator) {
  navigator.mediaSession.metadata = new MediaMetadata({
    title: 'Unforgettable',
    artist: 'Nat King Cole',
    album: 'The Ultimate Collection (Remastered)',
    artwork: [
      { src: 'https://dummyimage.com/96x96',   sizes: '96x96',   type: 'image/png' },
      { src: 'https://dummyimage.com/128x128', sizes: '128x128', type: 'image/png' },
      { src: 'https://dummyimage.com/192x192', sizes: '192x192', type: 'image/png' },
      { src: 'https://dummyimage.com/256x256', sizes: '256x256', type: 'image/png' },
      { src: 'https://dummyimage.com/384x384', sizes: '384x384', type: 'image/png' },
      { src: 'https://dummyimage.com/512x512', sizes: '512x512', type: 'image/png' },
    ]
  });

  navigator.mediaSession.setActionHandler('play', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('pause', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('stop', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('seekbackward', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('seekforward', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('seekto', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('previoustrack', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('nexttrack', function() { /* Code excerpted. */ });
  navigator.mediaSession.setActionHandler('skipad', function() { /* Code excerpted. */ });
}

The following example sets up two functions for playing and pausing, then uses them as callbacks with the relevant action handlers.

const actionHandlers = [
  // play
  [
    'play',
    async function() {
      // play our audio
      await audioEl.play();
      // set playback state
      navigator.mediaSession.playbackState = "playing";
      // update our status element
      updateStatus(allMeta[index], 'Action: play  |  Track is playing...')
    }
  ],
  [
    'pause',
    () => {
      // pause out audio
      audioEl.pause();
      // set playback state
      navigator.mediaSession.playbackState = "paused";
      // update our status element
      updateStatus(allMeta[index], 'Action: pause  |  Track has been paused...');
    }
  ],
]

for (const [action, handler] of actionHandlers) {
  try {
    navigator.mediaSession.setActionHandler(action, handler);
  } catch (error) {
    console.log(`The media session action "${action}" is not supported yet.`);
  }
}

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
MediaSession
Experimental
Chrome Full support 73Edge Full support ≤79Firefox Full support 71
Disabled
Full support 71
Disabled
Disabled From version 71: 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 No support NoOpera Full support YesSafari No support NoWebView Android No support NoChrome Android Full support 57Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android Full support 7.0
metadata
Experimental
Chrome Full support 73Edge Full support ≤79Firefox Full support 71
Disabled
Full support 71
Disabled
Disabled From version 71: 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 No support NoOpera Full support YesSafari No support NoWebView Android No support NoChrome Android Full support 57Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android Full support 7.0
playbackState
Experimental
Chrome Full support 73Edge Full support ≤79Firefox 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 No support NoOpera Full support YesSafari No support NoWebView Android No support NoChrome Android Full support 57Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android Full support 7.0
setActionHandler()
Experimental
Chrome Full support 73Edge Full support ≤79Firefox Full support 71
Disabled
Full support 71
Disabled
Disabled From version 71: 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 No support NoOpera Full support YesSafari No support NoWebView Android No support NoChrome Android Full support 57Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android Full support 7.0
setPositionState()
Experimental
Chrome Full support 73Edge Full support ≤79Firefox 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 No support NoOpera Full support YesSafari No support NoWebView Android No support NoChrome Android Full support 57Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android Full support 7.0

Legend

Full support  
Full support
No support  
No support
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.