# Window Bar

> A macOS-style frosted title bar with traffic-light dots that sits atop a browser-window, code-block, or panel surface, letting the caller place content after the dots.

- Author: [lailai0916](https://21st.dev/@lailai0916)
- Library: lailai0916
- License: MIT
- Tags: macOS
- npm dependencies: clsx
- Live preview: https://21st.dev/@lailai0916/components/window-bar

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/lailai0916/window-bar?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/macos.md