Returns the rotation of the device around the Z axis; that is, the number of degrees by which the device is being twisted around the center of the screen. See Orientation and motion data explained for details.


var alpha = instanceOfDeviceOrientationEvent.alpha;


Specification Status Comment
Device Orientation Events Working Draft Initial specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 7.0 6 [1] ? ? ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 3.0 6 [1] Not supported Not supported 4.2

[1] Firefox 3.6, 4, and 5 supported mozOrientation instead of the standard DeviceOrientationEvent interface

See also


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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.

API DeviceOrientation API NeedsBetterSpecLink NeedsCompatTable NeedsExample NeedsMarkupWork Property Reference