# Ink Checkbox

> A checkbox row that floods with ink from wherever you press it, flipping the text as the colour passes underneath, and drains back toward your next press. Keyboard toggles spread from the box. Optional description and a right-aligned price or count, in four tones.

- Slug: `ink-checkbox`
- Category: [Checkboxes](https://www.assembli.design/category/checkboxes.md)
- Type: component
- Tags: checkbox, row, clip-path, fill, add-ons, options
- npm dependencies: @base-ui/react
- shadcn/ui dependencies: none
- Added: 2026-10-22
- Live preview: https://www.assembli.design/preview/ink-checkbox
- Page: https://www.assembli.design/components/ink-checkbox

## Install

One-time setup (needs a subscription):

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

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

```bash
npx shadcn@latest add @assembli/ink-checkbox
```

Registry item JSON: https://www.assembli.design/r/ink-checkbox.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://www.assembli.design/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://www.assembli.design/api/agent/token for the key. Or subscribe at https://www.assembli.design/pricing and create a key at https://www.assembli.design/account.