# Button

> The main action trigger of the WunderUI design system: 11 variants, 2 shapes, 5 sizes. Built on Base UI, WCAG AA contrast, light and dark theme. Free, MIT.

- Author: [WunderUI](https://21st.dev/@kl-webmedia)
- Library: WunderUI - Free
- License: mit
- npm dependencies: cn, @base-ui/react, class-variance-authority
- Live preview: https://21st.dev/@kl-webmedia/components/button

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/kl-webmedia/button?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