# File Tree · Pro

A file explorer tree: folders spring open, indent guides line up the levels, files get icons by type, and the arrow keys walk it like an editor's sidebar.

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/file-tree
```

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

## API — File Tree
| Prop | Type | Default | Notes |
| --- | --- | --- | --- |
| `data` | `{ name: string; children?: FileTreeNode[] }[]` | — |  |
| `defaultExpanded` | `string[]` | — | Folder paths like "src/components". |
| `onSelect` | `(path: string) => void` | — |  |
| `className` | `string` | — |  |

See it live: https://charcoalui.com/docs/components/file-tree