# Conditions

:::info

Please read the [overview](/docs/theming/customization/overview) first to learn
how to properly customize the styling engine, and get type safety.

:::

## Example

Here's an example of how to customize conditions in Chakra UI.

```tsx title="theme.ts"
import { createSystem, defaultConfig, defineConfig } from "@chakra-ui/react"

const customConfig = defineConfig({
  conditions: {
    off: "&:is([data-state=off])",
    on: "&:is([data-state=on])",
  },
})

export const system = createSystem(defaultConfig, customConfig)
```

## Usage

Use `_off` and `_on` conditions to style elements based on the `data-state`
attribute.

```tsx title="app.tsx"
import { Box } from "@chakra-ui/react"

<Box data-state="off" _off={{ bg: "red.500" }} />
<Box data-state="on" _on={{ bg: "green.500" }} />
```