> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CheckoutInputRule.Companion

> Kotlin Object

**Object**

```kotlin theme={null}
companion object
```

## Functions

| Function | Description |
| - | - |
| `invoke` | Creates an input rule with a CSS string for the corner radius. |

### invoke

```kotlin theme={null}
operator fun ~~invoke~~(borderRadius: String? = null, font: CheckoutFontStyle? = null, colors: CheckoutColorStyle? = null, hover: CheckoutStateStyle? = null, focus: CheckoutStateStyle? = null): CheckoutInputRule
```

Creates an input rule with a CSS string for the corner radius.