---
title: alpha
framework: webkitjs
role: symbol
role_heading: Instance Property
path: webkitjs/deviceorientationevent/1629200-alpha
---

# alpha

The rotation, in degrees, of the device frame around its z-axis.

## Declaration

```data
readonly attribute unrestricted double alpha;
```

## Discussion

Discussion Values are between 0 and 360. This property is null if the device cannot provide this angle.

## See Also

### Getting Orientation Event Properties

- [beta](webkitjs/deviceorientationevent/1631254-beta.md)
- [gamma](webkitjs/deviceorientationevent/1631656-gamma.md)