The headphones
read-only property of the AudioChannelManager
interface returns a Boolean
that indicates whether headphones are plugged into the device. A true
value means that headphone are plugged in; false
means they aren't.
Syntax
var myHeadphonesValue = navigator.mozAudioChannelManager.headphones;
Value
A Boolean
value
Example
In the following simple example, we use the navigator.mozAudioChannelManager
property to access the app's AudioChannelManager
object, first to do some rudimentary feature detection, and then to create an anonymous function that runs when the AudioChannelManager.onheadphoneschange
event handler fires (when the headphones are plugged in or unplugged). In this function, we test to see if AudioChannelManager.headphones
returns true
, then give the user a notification to tell them the result.
if (navigator.mozAudioChannelManager) { navigator.mozAudioChannelManager.onheadphoneschange = function() { if(navigator.mozAudioChannelManager.headphones == true) { var notification = new Notification('Headphones plugged in!'); } else { var notification = new Notification('Headphones unplugged!'); } } }
Note: For a complete working example, see our audio-channels-demo. Try running this on your Firefox OS device as an installed app (install it using App Manager/WebIDE) and then see what happens when you play the music and then put the app in the background, with the channel set to normal, then content. You should also try plugging in and unplugging some headphones.
Specifications
The AudioChannels API has no official spec at the moment; see https://wiki.mozilla.org/WebAPI/AudioChannels for implementation details, WebIDL, etc.
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
General support | No support | No support | No support | No support | No support |
Feature | Android | Chrome | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
General support | No support | No support | No support | 1.0.1 | No support | No support | No support |