# Toast (Notchset): prompt.md (v1.0.0)

- id: `toast` · version 1.0.0 · component · pro (Pro)
- category: Feedback
- build: Base UI (one set of files; its dependencies follow the build)
- install (this build): `npx shadcn@latest add @beautiful-ui-pro/toast`
- npm dependencies: none
- registry dependencies: utils, https://beautiful-ui.dev/r/notchset-foundation.json
- docs: https://beautiful-ui.dev/components/toast
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

A toast() call and a Toaster in Notchset: toasts stack without overlapping, newest at the bottom, three at a time, each with a node, a mono meta line, an Undo that sends its inverse, and a 2px countdown line that pauses while you hover.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: none beyond React.
- Files: `components/ui/notchset/toast.tsx`; shared code: `lib/beautiful-ui/notchset/instrument.tsx`, `lib/beautiful-ui/notchset/root.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `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: `Toaster`, `toast`, `useToasts`, 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 { Toaster, toast } from "@/components/ui/notchset/toast";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `Toaster` | `toaster` | The stack. |
| `toast` | `toast` | One notice. |

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/toast.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
- toast, toaster, notification, snackbar, undo, sonner, Notchset
- Confirming an action that just happened, with an Undo when it can be reversed
- In place of shadcn's Sonner: the same toast() call

### Not when
- Conditions that need attention until fixed: use Alert
- Errors that block work: show them where they happened

## Mistakes
- Place one Toaster: every toast() call shows in it

## Usage

```tsx
"use client";

import { Toaster, toast } from "@/components/ui/notchset/toast";
import { Button } from "@/components/ui/notchset/button";

// Once, in your root layout (inside <body>).
export function AppToaster() {
  return <Toaster />;
}

export function PromoteButton({ rollback }: { rollback: () => void }) {
  return (
    <Button
      onClick={() =>
        toast("Planner v14 is live", {
          meta: "PROD · 100% TRAFFIC",
          action: { label: "Undo", onClick: rollback, then: { title: "Rolled back to v13" } },
        })
      }
    >
      Promote v14
    </Button>
  );
}
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `toast(title, options)` | `{ meta?, tone?: 'default' \| 'warn', action?: { label, onClick?, then? }, duration? }` |  | Shows a toast; returns its id. `then` replaces it after the action (an Undo's inverse). |
| `toast.dismiss(id?)` | `function` |  | Dismiss one, or all. |
| `Toaster` | `{ max?, duration?, label?, dismissLabel?, hotkey? }` |  | Place once. 3 visible, 5000ms, Alt+T focuses the stack. |

Full docs: https://beautiful-ui.dev/components/toast

## 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 |
|---|---|
| Alt+T | Focus the stack |
| Esc | Dismiss the focused toast |

## Performance

- One store for the page; each toast holds one timer, paused (not polled) while the stack is hovered.
- The countdown line is a CSS animation on transform; stacking moves are transforms.

## Responsive

- 340px, never wider than the screen less 32px; titles and meta truncate on one line each.

## Motion inventory

| Interaction | What moves |
|---|---|
| Enter | Rises 20px into place (420ms) as it fades in |
| Stack | Older toasts slide up 72px (420ms); the region grows (360ms) |
| Exit | Shrinks to .96 and fades (260ms) |
| Countdown | A 2px line runs out along the bottom over the toast's life; it keeps time with motion off |

## Accessibility contract (preserve when editing)
- A labelled region; each toast is a status (an alert when it warns)
- Hovering or focusing the stack pauses every countdown
- Alt+T moves focus to the newest toast; Esc dismisses the focused one
- Hidden toasts beyond the three visible are inert

## Install

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

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.