# Navigation Menu (Notchset): prompt.md (v1.0.0)

- id: `navigation-menu` · version 1.0.0 · component · pro (Pro)
- category: Navigation
- build: Base UI (this item also ships a Radix build)
- install (this build): `npx shadcn@latest add @beautiful-ui-pro/navigation-menu`
- npm dependencies: @base-ui/react@^1
- registry dependencies: utils, https://beautiful-ui.dev/r/notchset-foundation.json
- docs: https://beautiful-ui.dev/components/navigation-menu
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

shadcn's Navigation Menu in Notchset: a 64px bar on an ink trace with a node and stem under every trigger, one panel hanging from the active node that morphs between panels as content slides, and a docs search with ⌘K.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: `@base-ui/react@^1` (Base UI build); `radix-ui@^1` (Radix build).
- Files: `components/ui/notchset/navigation-menu.tsx`; shared code: `lib/beautiful-ui/notchset/navigation-menu.tsx`, `lib/beautiful-ui/notchset/instrument.tsx`, `lib/beautiful-ui/notchset/root.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `notchset-foundation`.
- Builds: separate Base UI and Radix files. Install the one that matches the project (see Install): a free item's bare URL installs the Base UI build of it and its dependencies.
- Exports to keep: `NavigationMenu`, `NavigationMenuBarLink`, `NavigationMenuContent`, `NavigationMenuDot`, `NavigationMenuItem`, `NavigationMenuLink`, `NavigationMenuList`, `NavigationMenuPositioner`, `NavigationMenuSearch`, `NavigationMenuTrigger`, and every exported type.
- CSS: the install adds the notchset foundation (tokens, keyframes, motion levels) to your global stylesheet once. Nothing to import by hand.
- Re-running `add` (or `--overwrite`) re-applies those rules: put overrides in your own CSS, never in the installed rules.
- Tokens: retheme with the `--notchset-*` custom properties (`--notchset-check`, `--notchset-control-edge`, `--notchset-draw-from`, `--notchset-ease-bloom`, `--notchset-ease-travel`, `--notchset-fade`, `--notchset-focus-color`, `--notchset-focus-inset`, `--notchset-life-from`, `--notchset-life-ms`, `--notchset-node-blink`, `--notchset-node-bloom`, `--notchset-node-delay`, `--notchset-plate-color`, `--notchset-rise-from`, `--notchset-rule`, `--notchset-scroll`, `--notchset-signal`, `--notchset-sweep-to`). Never add Tailwind colour classes inside the component.

```tsx
import { NavigationMenu, NavigationMenuContent, NavigationMenuItem, NavigationMenuLink, NavigationMenuList, NavigationMenuTrigger } from "@/components/ui/notchset/navigation-menu";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `NavigationMenu` | `navigation-menu` | The bar. |
| `NavigationMenuTrigger` | `navigation-menu-trigger` | A trigger with its node. |
| `NavigationMenuSearch` | `navigation-menu-search` | Docs search. |

Style a part with `[data-slot="<slot>"]` selectors or its `className`; keep the attributes when editing.

## Sound
- Keep every `data-slot` and `data-sound` attribute: the sound layer reads them.
- Installing this item adds no audio. Nothing plays until the app mounts `SoundProvider` once (install: `npx shadcn@latest add https://beautiful-ui.dev/r/notchset-sound.json`, import from `@/components/ui/notchset/sound-provider`); `useSound()` gives `muted` and `setMuted` for a mute control. Without a provider the audio engine never loads.

## Match the original
- Read `components/ui/notchset/navigation-menu.tsx` as the reference implementation before changing or recreating anything, and match it: sizes, colours per theme, motion timings, copy and behaviour.
- If you deviate (a prop you can't honour, a style you changed, a dependency you swapped), say so in your reply, part by part.
- Keep the accessibility contract, the keyboard map and the motion levels listed below.

## Use it when
- navigation menu, site nav, mega menu, header nav, navbar, shadcn navigation menu, Notchset
- A product or marketing site's top bar with grouped destinations

### Not when
- App navigation between views: use Sidebar or Tabs

## Mistakes
- Give each NavigationMenuContent its width, so the panel can morph between sizes

## Usage

```tsx
import { NavigationMenu, NavigationMenuContent, NavigationMenuItem, NavigationMenuLink, NavigationMenuList, NavigationMenuTrigger } from "@/components/ui/notchset/navigation-menu";

<NavigationMenu>
  <NavigationMenuList>
    <NavigationMenuItem>
      <NavigationMenuTrigger>Platform</NavigationMenuTrigger>
      <NavigationMenuContent className="w-[600px]">
        <NavigationMenuLink href="/agents">Agents</NavigationMenuLink>
      </NavigationMenuContent>
    </NavigationMenuItem>
  </NavigationMenuList>
</NavigationMenu>
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `NavigationMenu` | `as the primitive` |  | value, onValueChange; delay 110ms, closeDelay 220ms (Base UI). |
| `NavigationMenuTrigger / Content / Link` | `components` |  | As shadcn; links get a dot that pops on hover. |
| `NavigationMenuBarLink` | `link props` |  | A top-level link with the bar's look and node. |
| `NavigationMenuSearch` | `{ docs, suggested, hotkey, onOpen }` |  | The bar's docs combobox (⌘K). |

Full docs: https://beautiful-ui.dev/components/navigation-menu

## Customising
- Colours: the component reads your shadcn tokens (`--background`, `--foreground`, `--border` …), refined by the `--notchset-*` tokens. The signal colour is `--notchset-signal` (it falls back to `--destructive`). Set tokens on `:root`, or on any container to retheme one area.
- Dark mode follows the `.dark` class on an ancestor (the shadcn and next-themes convention).
- Update later by re-running the install with `--overwrite` (review the diff if you edited it). Changelog: https://beautiful-ui.dev/r/changelog.json

## Keyboard

| Keys | Action |
|---|---|
| ← / → | Move between triggers |
| ↓ / Enter / Space | Open and enter a panel |
| Esc | Close |
| ⌘K | Focus docs search |

## Performance

- Panels mount only while open; morphs are CSS on width, height and position.

## Responsive

- The bar fills its container; the search shrinks to 120px and the ⌘K hint hides under 900px.

## Motion inventory

| Interaction | What moves |
|---|---|
| Open | The node fills, its stem rises and the drop stem falls (120ms); the panel unrolls (360ms after 110ms) |
| Switch | The panel moves and resizes (400ms) as content slides 24px |
| Hover intent | 110ms to open, 220ms to close after leaving |

## Accessibility contract (preserve when editing)
- The Base UI or Radix navigation menu: roving focus, ← → between triggers, Esc closes
- Nodes and stems are drawn inside each trigger: right on the first frame
- The search is a combobox with a listbox and aria-activedescendant

## Install

```bash
npx shadcn@latest add @beautiful-ui-pro/navigation-menu
```

Pro item: needs the `@beautiful-ui-pro` registry in `components.json` and `BEAUTIFUL_UI_TOKEN` in `.env.local` (https://beautiful-ui.dev/account). Setup: https://beautiful-ui.dev/docs/pro. Your components.json `style` picks the build: radix-*, new-york and default get Radix, base-* gets Base UI.

## Credits
- Built on shadcn/ui (https://ui.shadcn.com)

The notchset foundation (the tokens listed above, keyframes and motion levels) installs once with the first component; its CSS is public at https://beautiful-ui.dev/r/notchset-foundation.json.