# Mercury Rail Loader

> A horizontal loading rail where a shape-shifting mercury-like bead travels back and forth with a soft reflected trail, used to signal indeterminate progress for an inline task or section.

- Author: [johnmamanao](https://21st.dev/@johnmamanao)
- Library: @delego
- License: MIT
- Tags: Loader, Spinner, Progress, Animation
- Live preview: https://21st.dev/@johnmamanao/components/mercury-rail-loader

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/johnmamanao/mercury-rail-loader?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/loader.md