# Code Window · Pro

A code window with window chrome, light syntax colouring in theme tokens, line numbers and highlighted lines, that can type its code in with a blinking caret.

This is a Charcoal UI Pro component. Its source and examples are available with a Pro seat: https://charcoalui.com/pricing

## With a Pro seat

1. Add the registry to components.json:

```json
{
  "registries": {
    "@charcoal": {
      "url": "https://charcoalui.com/r/{name}.json",
      "headers": {
        "Authorization": "Bearer ${CHARCOAL_LICENSE_KEY}"
      }
    }
  }
}
```

2. Copy your licence key from https://charcoalui.com/dashboard and put it in .env.local as CHARCOAL_LICENSE_KEY, then:

```bash
npx shadcn@latest add @charcoal/code-window
```

To read Pro source through this MCP server, reconnect it with the header "Authorization: Bearer <licence key>".

## API — Code Window
| Prop | Type | Default | Notes |
| --- | --- | --- | --- |
| `code` | `string` | — |  |
| `title` | `string` | `"index.tsx"` |  |
| `language` | `string` | — |  |
| `typing` | `boolean` | `false` |  |
| `speed` | `number` | `60` | Characters per second. |
| `highlight` | `number[]` | — | 1-based lines. |
| `lineNumbers` | `boolean` | `true` |  |
| `className` | `string` | — |  |

See it live: https://charcoalui.com/docs/components/code-window