# Live activity bar (Notchset): prompt.md (v2.0.0) - id: `live-activity-bar` · version 2.0.0 · block · free - category: Marketing - build: one set of files for every shadcn style - install: `npx shadcn@latest add https://notchset.dev/r/live-activity-bar.json` - npm dependencies: lucide-react@^1 - registry dependencies: utils, https://notchset.dev/r/notchset-foundation.json, @notchset/button, @notchset/reveal - docs: https://notchset.dev/blocks/live-activity-bar - The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand. The next thing on your day, held above a phone's tab bar: it counts down live, turns into Now with one calm pulse, opens into a small card when pressed and folds away when dismissed. Nothing moves at rest.. ## Build it - Stack: React 18.3 or 19, TypeScript, Tailwind CSS v4 utility classes on the foundation's roles, a components.json (imports use its aliases). - Packages: `lucide-react@^1`. - Files: `components/ui/notchset/blocks/live-activity-bar.tsx`. - Registry dependencies, installed with it automatically: shadcn `utils` (cn), `notchset-foundation`, `button`, `reveal`. - Builds: one set of files, the same for every shadcn style. - Exports to keep: `LiveActivityBar`, and every exported type. - CSS: the install adds the notchset foundation (its roles, keyframes and motion switch, reading your shadcn tokens for colour) 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. - Colours: every part reads the foundation's roles (`--ns-canvas`, `--ns-ink`, `--ns-line`, `--ns-signal` …), which read your shadcn tokens (`--background`, `--foreground`, `--border`, `--destructive` …), plus the optional `--success` and `--warning`. Retheme on `:root` or any container; never add Tailwind colour classes inside the component. - This item reads `--ns-canvas`, `--ns-ease`, `--ns-ink`, `--ns-ok`, `--ns-radius-lg`, `--ns-shadow-float`, `--ns-text-small`, `--ns-time-color`, `--ns-time-menu`, `--ns-time-toast`, `--ns-weight-medium`. - Retune it (on any ancestor) with the foundation's roles and hooks: `--ns-bad`, `--ns-bad-ink`, `--ns-band`, `--ns-band-edge`, `--ns-band-grade`, `--ns-band-optimal`, `--ns-beat`, `--ns-bezel`, `--ns-canvas`, `--ns-cat-1`, `--ns-cat-2`, `--ns-cat-3`, `--ns-cat-4`, `--ns-cat-5`, `--ns-cat-6`, `--ns-check`, `--ns-chip`, `--ns-control`, `--ns-control-pad`, `--ns-control-sm`, `--ns-deep`, `--ns-deep-ink`, `--ns-deep-ink-2`, `--ns-deep-line`, `--ns-dialog`, `--ns-dialog-lg`, `--ns-dialog-sm`, `--ns-ease`, `--ns-ease-in`, `--ns-ease-panel`, `--ns-ease-pop`, `--ns-field`, `--ns-flood-arc`, `--ns-flood-aurora`, `--ns-flood-behind-1`, `--ns-flood-behind-2`, `--ns-flood-bloom`, `--ns-flood-deep`, `--ns-flood-dial-bloom`, `--ns-flood-glass`, `--ns-flood-grain`, `--ns-flood-image`, `--ns-flood-ink`, `--ns-flood-ink-low`, `--ns-flood-light`, `--ns-flood-mid`, `--ns-flood-pale`, `--ns-flood-pane`, `--ns-flood-pane-edge`, `--ns-flood-pill-ink`, `--ns-flood-ribbon`, `--ns-flood-ribbon-core`, `--ns-flood-shadow`, `--ns-flood-sheen`, `--ns-flood-wash`, `--ns-font-body`, `--ns-font-display`, `--ns-font-mono`, `--ns-font-script`, `--ns-glass`, `--ns-glass-blur`, `--ns-glass-shadow`, `--ns-glow`, `--ns-grain`, `--ns-gutter`, `--ns-header`, `--ns-heat`, `--ns-hover`, `--ns-ink`, `--ns-ink-2`, `--ns-ink-3`, `--ns-ink-4`, `--ns-leading`, `--ns-lift`, `--ns-light-1`, `--ns-light-2`, `--ns-light-3`, `--ns-light-spread`, `--ns-light-strength`, `--ns-line`, `--ns-line-soft`, `--ns-lit-edge`, `--ns-menu-dy`, `--ns-menu-row`, `--ns-mesh`, `--ns-mesh-frost`, `--ns-ok`, `--ns-ok-ink`, `--ns-orb-body`, `--ns-orb-cool`, `--ns-orb-core`, `--ns-orb-dawn`, `--ns-orb-deep`, `--ns-orb-edge`, `--ns-orb-grain`, `--ns-orb-ground`, `--ns-orb-halo`, `--ns-orb-inner`, `--ns-orb-key`, `--ns-orb-lift`, `--ns-orb-limb`, `--ns-orb-limb-from`, `--ns-orb-rim`, `--ns-orb-skin-hi`, `--ns-orb-skin-lo`, `--ns-orb-skin-mid`, `--ns-orb-warm`, `--ns-panel`, `--ns-panel-w`, `--ns-prism-edge`, `--ns-prism-glint`, `--ns-prism-sheen`, `--ns-prism-tint`, `--ns-pulse`, `--ns-radius`, `--ns-radius-card`, `--ns-radius-full`, `--ns-radius-lg`, `--ns-radius-sm`, `--ns-radius-xl`, `--ns-raised`, `--ns-range`, `--ns-row`, `--ns-row-compact`, `--ns-segment`, `--ns-selected`, `--ns-series`, `--ns-series-core`, `--ns-series-lilac`, `--ns-series-tint`, `--ns-shadow-dialog`, `--ns-shadow-float`, `--ns-shadow-panel`, `--ns-sheet`, `--ns-sheet-bottom`, `--ns-side`, `--ns-signal`, `--ns-sleep-awake`, `--ns-sleep-deep`, `--ns-sleep-light`, `--ns-sleep-rem`, `--ns-space-1`, `--ns-space-2`, `--ns-space-3`, `--ns-space-4`, `--ns-space-5`, `--ns-space-6`, `--ns-space-8`, `--ns-space-section`, `--ns-stack-on`, `--ns-standing-critical`, `--ns-standing-in`, `--ns-standing-out`, `--ns-state-doing`, `--ns-state-done`, `--ns-state-review`, `--ns-state-todo`, `--ns-switch-h`, `--ns-switch-w`, `--ns-text-body`, `--ns-text-control`, `--ns-text-display`, `--ns-text-figure`, `--ns-text-headline`, `--ns-text-hero`, `--ns-text-lede`, `--ns-text-meta`, `--ns-text-page`, `--ns-text-record`, `--ns-text-small`, `--ns-text-strong`, `--ns-text-sub`, `--ns-text-title`, `--ns-tile-shadow`, `--ns-time-born`, `--ns-time-color`, `--ns-time-dialog`, `--ns-time-menu`, `--ns-time-page`, `--ns-time-panel`, `--ns-time-toast`, `--ns-tint`, `--ns-tint-ink`, `--ns-toast-bottom`, `--ns-toast-left`, `--ns-touch`, `--ns-tracking-display`, `--ns-tracking-headline`, `--ns-warn`, `--ns-warn-ink`, `--ns-wash-clay`, `--ns-wash-dusk`, `--ns-wash-graphite`, `--ns-wash-ink`, `--ns-wash-sage`, `--ns-wash-sand`, `--ns-weight-light`, `--ns-weight-medium`, `--ns-weight-regular`, `--ns-weight-strong`, `--ns-well`. - Never add Tailwind colour classes inside the component. ```tsx import { LiveActivityBar } from "@/components/ui/notchset/blocks/live-activity-bar"; ``` ## Parts - A single export that takes props. ## Match the original - Read `components/ui/notchset/blocks/live-activity-bar.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 ### Not when ## Built from - button (`button`), installed with it: reuse it, don't rebuild it - reveal (`reveal`), installed with it: reuse it, don't rebuild it ## Mistakes - Recreating the component instead of installing it ## Usage ```tsx "use client"; import * as React from "react"; import { LiveActivityBar } from "@/components/ui/notchset/blocks/live-activity-bar"; import { Button } from "@/components/ui/notchset/button"; export default function LiveActivityBarDemo() { const [start, setStart] = React.useState(() => Date.now() + 8 * 60e3); const [shown, setShown] = React.useState(true); return (
{shown && {}} onDismiss={() => setShown(false)} />}
); } ``` ## Props | Prop | Type | Default | What it does | |---|---|---|---| | `title` | `string` | | Required. | | `subtitle` | `string` | | | | `startsAt` | `string \| number \| Date` | | Required. | | `now` | `number` | | the current time in ms, for a controlled clock; omit to let the bar tick by itself | | `where` | `string` | | where it happens ("Google Meet", "Room 4") | | `people` | `React.ReactNode` | | who is in it, in words | | `joinLabel` | `string` | `"Join"` | | | `onJoin` | `() => void` | | | | `onDismiss` | `() => void` | | | Full docs: https://notchset.dev/blocks/live-activity-bar ## Customising - Colours: every part reads the foundation's roles (`--ns-canvas`, `--ns-ink`, `--ns-line`, `--ns-signal` …), which read your shadcn tokens (`--background`, `--foreground`, `--border`, `--destructive` …), plus the optional `--success` and `--warning`. Retheme on `:root` or any container; never add Tailwind colour classes inside the component. - Dark mode follows the `.dark` class or `data-theme="dark"` on an ancestor (the shadcn and next-themes conventions). - Update later: Commit or stash local changes first (or copy the files), so the update can be undone. Read https://notchset.dev/r/changelog.json for the new versions: a major version, an entry marked breaking or a merge says what to change. Then re-run the install with `--overwrite`, on a branch. It replaces the component's files, the shared helper files they import, and the item's CSS rules in the global stylesheet, so review the whole diff (components, shared files, CSS), re-apply your own edits, and run the app's typecheck, tests and build. ## Accessibility contract (preserve when editing) ## Install ```bash npx shadcn@latest add https://notchset.dev/r/live-activity-bar.json ``` Or add the `@notchset` registry to components.json and run `npx shadcn@latest add @notchset/live-activity-bar`. Every components.json style gets the same files. ## Source ### components/ui/notchset/blocks/live-activity-bar.tsx ```tsx // Notchset live-activity-bar 2.0.0 · https://notchset.dev/changelog "use client"; import * as React from "react"; import { ChevronUp, X } from "lucide-react"; import { cn } from "@/lib/utils"; import { Button } from "@/components/ui/notchset/button"; import { Reveal } from "@/components/ui/notchset/reveal"; /* * Live activity bar: the next thing on your day, held at the bottom of the screen just above a tab bar. It rises * once when it arrives, counts down live ("in 8 min", then seconds in the last minute), and at the start turns * into "Now" with one calm pulse. Press it to open a small card (who, where, Join); dismiss it and it folds away. * Nothing laps at rest: the only motion is the arrival, the minute changing and the one pulse at the start. * * * * `now` makes the clock controlled (a demo, a test): pass the current time in ms and the bar shows it; leave it * out and the bar keeps its own clock. Screen readers hear the time at sensible moments (10, 5 and 1 minute, and * the start), never every second. */ type LiveActivityBarProps = { title: string; subtitle?: string | undefined; startsAt: string | number | Date; /** the current time in ms, for a controlled clock; omit to let the bar tick by itself */ now?: number | undefined; /** where it happens ("Google Meet", "Room 4") */ where?: string | undefined; /** who is in it, in words */ people?: React.ReactNode; joinLabel?: string | undefined; onJoin?: (() => void) | undefined; onDismiss?: (() => void) | undefined; className?: string | undefined; }; /** How long a started event keeps saying "Now" before it reads as running. */ const NOW_FOR = 5 * 60e3; function when(ms: number) { if (ms <= 0) return ms > -NOW_FOR ? "Now" : "Started"; if (ms < 60e3) return `in ${Math.ceil(ms / 1000)}s`; const m = Math.ceil(ms / 60e3); return m < 60 ? `in ${m} min` : `in ${Math.floor(m / 60)} h ${m % 60 ? `${m % 60} min` : ""}`.trim(); } /** What a screen reader hears, only when it changes: a few moments, not a ticker. */ function spoken(ms: number) { if (ms <= 0) return "Starting now"; const m = Math.ceil(ms / 60e3); return [10, 5, 1].includes(m) ? `${m} ${m === 1 ? "minute" : "minutes"} to go` : ""; } const NEVER_CHANGES = () => () => {}; /** * False while the page is built, true once the browser has it. A page can be rendered an hour before it is * read, and in another zone, so nothing taken from this machine's clock or locale is written into the HTML: * the first render in the browser repeats what the server sent, and the real time arrives right after. */ function useMounted() { return React.useSyncExternalStore(NEVER_CHANGES, () => true, () => false); } /** The time now, or null until the browser has the page. A caller that passes `now` sets it for both. */ function useClock(controlled: number | undefined, target: number, mounted: boolean) { const [own, setOwn] = React.useState(() => Date.now()); React.useEffect(() => { if (controlled != null) return; /* one tick at a time: every second in the last minute and a half, otherwise every ten, so nothing renders more than it must */ const id = setTimeout(() => setOwn(Date.now()), target - own < 90e3 ? 1000 : 10e3); return () => clearTimeout(id); }, [controlled, target, own]); if (controlled != null) return controlled; return mounted ? own : null; } function LiveActivityBar({ title, subtitle, startsAt, now, where, people, joinLabel = "Join", onJoin, onDismiss, className }: LiveActivityBarProps) { const target = new Date(startsAt).getTime(); const mounted = useMounted(); const t = useClock(now, target, mounted); const left = t === null ? null : target - t; const label = left === null ? "" : when(left); const live = left !== null && left <= 0 && left > -NOW_FOR; const [open, setOpen] = React.useState(false); const [gone, setGone] = React.useState(false); const cardId = React.useId(); /* what a screen reader hears changes only at the moments worth saying */ const say = left === null ? "" : spoken(left); const [heard, setHeard] = React.useState(""); if (say && say !== heard) setHeard(say); const dismiss = () => { setGone(true); setOpen(false); onDismiss?.(); }; if (gone) return null; return (
{onJoin && ( )}
{where && ( <>
Where
{where}
)} {people && ( <>
Who
{people}
)}
Starts
{/* The zone and locale are the reader's, which the machine building the page cannot know, so the time waits for the browser even when the caller sets `now`. */}
{mounted ? new Date(target).toLocaleTimeString([], { hour: "numeric", minute: "2-digit" }) : ""}
{onDismiss && ( )}
{heard ? `${title}: ${heard}` : ""}
); } export { LiveActivityBar, type LiveActivityBarProps }; ``` The 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.