# Table of Contents · Pro

Scroll-spy outline: an ember marker slides to the section you are reading, and links scroll smoothly.

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/table-of-contents
```

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

## API — Table of Contents
| Prop | Type | Default | Notes |
| --- | --- | --- | --- |
| `items` | `{ id: string; label: string; level?: 1 \| 2 \| 3 }[]` | — |  |
| `container` | `RefObject<HTMLElement>` | — | Defaults to the page. |

See it live: https://charcoalui.com/docs/components/table-of-contents