# Action Swap Cascade

> Animated button whose label swaps letter-by-letter — the old text's characters roll away as the new ones drop in, left to right — ideal for copy/copied and other stateful action toggles.

- Author: [Saurabh](https://21st.dev/@saurabh10102)
- Library: Be UI
- License: MIT
- Tags: Button, Animation, Motion, Micro Interaction
- Live preview: https://21st.dev/@saurabh10102/components/action-swap-cascade

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/saurabh10102/action-swap-cascade?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/button.md