# MOUSEBUTTON_MIDDLE

Variable · category: Input

Source: https://github.com/playcanvas/engine/blob/b5b983982a9860d21e0c1dafb2f85f72e2c01afb/src/platform/input/constants.js#L614

The middle mouse button.

```ts
const MOUSEBUTTON_MIDDLE: 1 = 1
```