# Roll Text

> Letters roll up and out and a duplicate rolls in behind them, staggered left to right, whenever the parent is hovered or focused. Pure CSS transitions, works for links, nav and buttons.

- Slug: `roll-text`
- Category: [Text effects](https://assembli-rho.vercel.app/category/text-effects.md)
- Type: component
- Tags: hover, letters, stagger, link
- npm dependencies: none
- shadcn/ui dependencies: none
- Added: 2026-10-15
- Live preview: https://assembli-rho.vercel.app/preview/roll-text
- Page: https://assembli-rho.vercel.app/components/roll-text

## Install

One-time setup (needs a subscription):

1. Add the registry to the project's `components.json`: `{"@assembli":{"url":"https://assembli-rho.vercel.app/r/{name}.json","headers":{"Authorization":"Bearer ${ASSEMBLI_API_KEY}"}}}` (merge into `"registries"`).
2. Put an API key from https://assembli-rho.vercel.app/account in `.env.local` as `ASSEMBLI_API_KEY=asm_…`.

Then install with the shadcn CLI (writes `components/roll-text/roll-text.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/roll-text
```

Registry item JSON: https://assembli-rho.vercel.app/r/roll-text.json (send `Authorization: Bearer <api key>`)

## Code

> Component source needs an Assembli subscription ($12/month) and an API key sent as `Authorization: Bearer <key>`. To get one without copying anything, POST https://assembli-rho.vercel.app/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://assembli-rho.vercel.app/api/agent/token for the key. Or subscribe at https://assembli-rho.vercel.app/pricing and create a key at https://assembli-rho.vercel.app/account.