Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Feature-Policy header speaker-selection directive controls whether the current document is allowed to enumerate and select audio output devices (speakers, headphones, etc.).
When this policy is enabled and the permission is denied:
MediaDevices.enumerateDevices()won't return devices of type audio output.MediaDevices.selectAudioOutput()won't display the popup for selecting an audio output, and will reject the promise with aNotAllowedError.HTMLMediaElement.setSinkId()will throw aNotAllowedErrorif called for an audio output.