# Stats Band (Notchset): prompt.md (v1.0.0)

- id: `stats-band` · version 1.0.0 · block · pro (Pro)
- category: Marketing
- build: Base UI (one set of files; its dependencies follow the build)
- install (this build): `npx shadcn@latest add @notchset-pro/stats-band`
- npm dependencies: class-variance-authority@^0.7
- registry dependencies: utils, @notchset/segmented-control, https://notchset.dev/r/notchset-foundation.json
- docs: https://notchset.dev/components/stats-band
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

Four measured numbers that roll up from zero once the band is in view, each with a label, a sub-line and a small chart with hover captions (a monthly line, daily uptime bars with incidents in signal, a histogram with its median bin, a before → after ruler), REPLAY, DIVIDED / PLAIN, and HOW WE MEASURE THESE.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: `class-variance-authority@^0.7`.
- Files: `components/ui/notchset/blocks/stats-band.tsx`; shared code: `lib/beautiful-ui/notchset/instrument.tsx`, `lib/beautiful-ui/notchset/root.ts`, `lib/beautiful-ui/notchset/button-variants.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `segmented-control`, `notchset-foundation`.
- Builds: one set of files for both, but its dependencies come in Base UI and Radix builds. 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: `StatsBand`, 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-glide`, `--notchset-ease-key-down`, `--notchset-ease-key-up`, `--notchset-ease-travel`, `--notchset-fade`, `--notchset-focus-color`, `--notchset-focus-inset`, `--notchset-grow-to`, `--notchset-key-down`, `--notchset-key-up`, `--notchset-life-from`, `--notchset-life-ms`, `--notchset-node-blink`, `--notchset-node-bloom`, `--notchset-node-delay`, `--notchset-plate-color`, `--notchset-rise-from`, `--notchset-rule`, `--notchset-scan-to`, `--notchset-scroll`, `--notchset-sheet-from`, `--notchset-signal`, `--notchset-sweep-to`, `--notchset-travel`). Never add Tailwind colour classes inside the component.

```tsx
import { StatsBand, type Stat } from "@/components/ui/notchset/blocks/stats-band";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `StatsBand` | `stats-band` | Header, the four cells with charts, and the method notes. |

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://notchset.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/blocks/stats-band.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
- stats section, metrics band, by the numbers, social proof numbers, uptime, kpi strip, landing page, Notchset
- A landing page's proof numbers, each backed by its data
- Status or trust pages that show uptime and speed

### Not when
- Live dashboards: use Metric Card
- Numbers you can't source: leave them out

## Mistakes
- Keep values short enough to read in one glance
- Publish only measured numbers, and say how

## Usage

```tsx
import { StatsBand, type Stat } from "@/components/ui/notchset/blocks/stats-band";

export function Numbers({ stats }: { stats: Stat[] }) {
  return <StatsBand eyebrow="RELAY IN NUMBERS" title="Fast, steady and getting better" stats={stats} />;
}
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `stats` | `{ id, value, label, sub, chart, caption, method? }[]` |  | chart is a line, bars (with incidents), histogram or compare; value's digits roll. |
| `title / eyebrow` | `ReactNode / string` |  | The heading and the line above it. |

Full docs: https://notchset.dev/components/stats-band

## 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://notchset.dev/r/changelog.json

## Keyboard

| Keys | Action |
|---|---|
| Tab then Enter | Replay, switch layout, open the method notes |

## Performance

- Small SVGs and CSS transitions; one observer that disconnects once the band is seen.

## Responsive

- Four across, two across under 860px, one under 460px (container width).

## Motion inventory

| Interaction | What moves |
|---|---|
| In view | Numbers roll up from zero, cells staggered; the line draws in (1100ms), bars grow 6ms apart |
| Compare | The after dot glides to its value (900ms, 500ms delay) |
| PLAIN | Rules drop and the gaps widen (420ms) |

## Accessibility contract (preserve when editing)
- Each number is text; charts are decorative and their captions carry the hovered value in a polite live region
- HOW WE MEASURE THESE is a button with aria-expanded
- Reduced motion starts at the final values

## Install

```bash
npx shadcn@latest add @notchset-pro/stats-band
```

Pro item: needs the `@notchset-pro` registry in `components.json` and `NOTCHSET_TOKEN` in `.env.local` (https://notchset.dev/account). Setup: https://notchset.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://notchset.dev/r/notchset-foundation.json.