# Table of Contents

> An auto-scrolling table of contents that highlights the active section using an intersection observer as the reader scrolls.

- Author: [inference.sh](https://21st.dev/@inference-sh)
- Library: inference.sh
- License: no-license
- Tags: Sidebar, Table of Content, Navigation, Scrollspy, Docs
- npm dependencies: lucide-react
- Live preview: https://21st.dev/@inference-sh/components/table-of-contents

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/inference-sh/table-of-contents?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/sidebar.md