This property indicates the rate of rotation around the Z axis -- in degrees per second -- in a DeviceRotationRate object.


var alpha = deviceRotationRate.alpha;

This property is read-only.

Return value

A double indicating the rate of rotation around the Z axis, in degrees per second. See Accelerometer values explained for details.


Specification Status Comment
Device Orientation Events Working Draft Initial specification.

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support ?(Yes) ? ? ? ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

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 Contributors to this page: erikadoyle, fscholz, teoli, MHasan, kscarfone, Sheppy
 Last updated by: erikadoyle,