# Notch Tab Bar

> Mobile bottom tab bar with a curved cutout that glides under the active tab while its icon floats up in a coloured bubble.

- Slug: `notch-tab-bar`
- Category: [Navigation](https://www.assembli.design/category/navigation.md)
- Type: component
- Tags: mobile, tab-bar, svg, spring
- npm dependencies: motion
- shadcn/ui dependencies: none
- Added: 2026-10-15
- Live preview: https://www.assembli.design/preview/notch-tab-bar
- Page: https://www.assembli.design/components/notch-tab-bar

## 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/notch-tab-bar/notch-tab-bar.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/notch-tab-bar
```

Registry item JSON: https://www.assembli.design/r/notch-tab-bar.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.