---
title: beta
framework: webkitjs
role: symbol
role_heading: Instance Property
path: webkitjs/deviceorientationevent/1631254-beta
---

# beta

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

## Declaration

```data
readonly attribute unrestricted double beta;
```

## Discussion

Discussion Values are between -90 and 90. This property is null if the device cannot provide this angle.

## See Also

### Getting Orientation Event Properties

- [alpha](webkitjs/deviceorientationevent/1629200-alpha.md)
- [gamma](webkitjs/deviceorientationevent/1631656-gamma.md)