# Undo Feedback

> A dismissible "item removed" snackbar card with an Undo button that shows pending, restored and error states while an async restore action runs, ported from SL UI Library's vanilla-JS Matte Feedback kit (MIT, credit to original author SLtowl).

- Author: [sltowl](https://21st.dev/@sltowl)
- Library: SLtowl
- License: MIT
- Tags: Snackbar, Feedback, Toast, Notification
- Live preview: https://21st.dev/@sltowl/components/matte-undo-feedback

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/sltowl/matte-undo-feedback?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/snackbar.md