This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

The MediaTrackConstraints dictionary's volume property is a ConstrainDouble describing the requested or mandatory constraints placed upon the value of the volume constrainable property.

If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.volume as returned by a call to MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.


var constraintsObject = { volume: constraint };

constraintsObject.volume = constraint;


A ConstrainDouble describing the acceptable or required value(s) for an audio track's volume, on a linear scale where 0.0 means silence and 1.0 is the highest supported volume.

If this value is a number, the user agent will attempt to obtain media whose volume is as close as possible to this number given the capabilities of the hardware and the other constraints specified. Otherwise, the value of this ConstrainDouble will guide the user agent in its efforts to provide an exact match to the required volume (if exact is specified or both min and max are provided and have the same value) or to a best-possible value.

Any constraint set which only permits values outside the range 0.0 to 1.0 cannot be satisfied and will result in failure.


See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
volumeChrome Full support 59Edge ? Firefox No support NoIE No support NoOpera Full support YesSafari ? WebView Android Full support 59Chrome Android Full support 59Firefox Android No support NoOpera Android ? Safari iOS ? Samsung Internet Android Full support 7.0


Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also