Question 1

What is a banner block?

Accepted Answer

A banner block is a pre-built, production-ready site notice that you can drop into any React or Next.js app. Each block is a single self-contained TSX component rendering one compact announcement — a sticky top bar, an alert strip, a floating pill, a countdown, a cookie consent prompt, a live status indicator, and more — styled with shadcn/ui and Tailwind CSS. Banners are chrome: they sit above the nav, below the hero, or as a floating affordance, deliver one message, and get out of the way.

Question 2

Are shadcn.io banner blocks free?

Accepted Answer

Browsing the gallery, previewing every layout, and reading the code is completely free. Downloading the full source of the Pro blocks requires a shadcn.io Pro subscription — the same tier that unlocks every block in the registry. Individual, Team, and Organization licenses are available monthly, yearly, or lifetime.

Question 3

How are banners different from toasts, alerts, or dialogs?

Accepted Answer

Banners are persistent site chrome that announces one thing until the visitor reads or dismisses it. Toasts are transient — they pop up, wait a few seconds, and disappear. Alerts (the shadcn/ui `<Alert>` primitive) are inline status messages rendered inside a form or page body. Dialogs interrupt the user with a modal overlay. If your message is persistent, low-friction, and belongs outside the main content area, you want a banner. If it's ephemeral, embedded in a form, or blocks interaction, pick toast, alert, or dialog instead.

Question 4

Do I need a shadcn.io Pro subscription to use banner blocks?

Accepted Answer

You need Pro to copy or download the full source code. Pro unlocks all 100 banner blocks plus the rest of the shadcn.io component library — over 6,000 blocks across 56 categories. If you only want to browse, preview, or compare layouts before deciding, no subscription is needed.

Question 5

Which banner layout should I pick for my site?

Accepted Answer

For a sticky site-wide announcement (new feature, policy update, changelog note), use a Top Bar — one line, tight padding, optional dismiss. For a semantic status message (info/warning/success/error), use an Alert Strip with a 3px accent border and a muted icon colour. For a non-intrusive feature tease (AI launch, beta invite), use a Floating Pill. For a migration notice or critical maintenance window, use a Full-Bleed Inverted Announcement so the message visually breaks from the rest of the page. For a cookie consent or trial expiry, use the Multi-Action archetype with primary/secondary/ghost buttons in a row.

Question 6

When should I pick a floating pill over a top bar?

Accepted Answer

Pick a pill when the banner must not push page content down or compete with the hero for attention — pills are absolutely positioned, so their appearance and dismissal never cause layout shift. Pick a top bar when the announcement is global site chrome that every visitor should see the moment they land (upcoming maintenance, new pricing, etc.) and you don't mind a small CLS cost. A good rule of thumb: top bars for site-wide persistent announcements, pills for page-level feature teases, alerts for semantic status inside a content flow.

Question 7

Which banner works best for cookie consent?

Accepted Answer

Use one of the Multi-Action variants — they're purpose-built for consent flows where you need Accept, Manage Preferences, and Decline buttons in the same action row. The cookie-consent, consent-granular, and preferences blocks each place the primary button first (leftmost for reading order), an outline secondary for Manage, and a ghost tertiary for Decline. Pair them with smooth `AnimatePresence` collapse on dismiss so the footer of the page doesn't jump when the banner disappears.

Question 8

How do I make a countdown banner hydration-safe?

Accepted Answer

Never compute `Date.now()` or `new Date()` during render — that's the #1 hydration trap. Use a hardcoded static target timestamp, initialize state to `null` or a deterministic placeholder like `"--d --h --m"`, and move all time computation into a `useEffect` that runs only on the client. Add `tabular-nums` to the countdown row so digits don't jitter as they tick. Every countdown banner in this gallery follows that pattern, so you can copy one as a reference.

Question 9

How do I add a banner to my Next.js app?

Accepted Answer

Open any block detail page, copy the full TSX source, and paste it into your project as a new file (e.g. `components/banner-top-bar.tsx`). Each block imports from `~/components/ui/*` — the standard shadcn/ui path alias — so it works immediately inside any shadcn-bootstrapped Next.js app. Render it in your root layout above the `<Nav>` for site-wide chrome, or inside a specific page for scoped announcements. No CLI install, no registry configuration, no extra dependencies beyond what shadcn/ui already gives you.

Question 10

How do I persist banner dismissal across page loads?

Accepted Answer

The demo blocks intentionally do not wire up localStorage — dismissal persistence is an application-level concern. To persist a dismissal, wrap the `useState<boolean>` dismiss hook in a `useEffect` that reads and writes a per-banner key (e.g. `banner:v4-launch`) to localStorage. Gate the initial render on a `mounted` state so you don't hit a hydration mismatch. For critical banners that you want to re-show on the next release, include a version token in the key (`banner:v4-launch:2026-04`) so bumping the key surfaces the banner again.

Question 11

Can I wire banners to a feature flag or CMS?

Accepted Answer

Yes. Fetch the banner content and visibility flag in a Server Component parent and pass them as props to the client banner. Swap the hardcoded title/description strings for the fetched values and render `null` when the flag is off. For marketing-led banners (launch week, Black Friday), pair this with a feature-flag provider like GrowthBook, LaunchDarkly, or PostHog so product can toggle the banner on and off without deploying.

Question 12

Are banner blocks accessible?

Accepted Answer

Every banner follows WAI-ARIA practice: decorative icons are marked `aria-hidden`, dismiss buttons have `aria-label="Dismiss banner"`, expandable variants use `aria-expanded` and `aria-controls`, progress bars use `role="progressbar"` with aria-valuenow/min/max, and live status dots have a descriptive `aria-label`. All interactive elements are real `

Question 13

What tech stack do the shadcn.io banner blocks use?

Accepted Answer

React 19, Next.js 16 App Router, TypeScript, Tailwind CSS 4, and shadcn/ui. A handful of blocks use Motion (the modern successor to framer-motion) for entrance and dismissal animations — a subtle `y: -4` fade on mount and an `AnimatePresence` height collapse on dismiss. Interactive variants (carousel, expandable, multi-action) lean on shadcn's Button, Collapsible, Tabs, and Tooltip primitives. Zero runtime dependency on shadcn.io itself — once you copy a block, it belongs to your codebase.

Question 14

Do the banner blocks support dark mode?

Accepted Answer

Yes. Every block uses shadcn's semantic color tokens (`bg-card`, `text-foreground`, `text-muted-foreground`, `border`) instead of hardcoded hex values, so dark mode works automatically the moment your app's `class` or `data-theme` attribute flips. Semantic alert colours (info/warn/success/error) live on the icon at `/90` opacity and on the border at `/80` opacity — both tones remain legible against the dark `bg-card` without any `dark:` overrides.

Question 15

How do I stop a ticker/marquee banner causing motion sickness?

Accepted Answer

Every marquee variant ships with a `@media (prefers-reduced-motion: reduce)` fallback that sets `animation: none` on the ticker row, so visitors with reduced-motion preferences see a static strip instead of an infinite scroll. The entrance animations are gated via `useReducedMotion` from motion/react for the same reason. You don't have to add anything — it's already wired up.

Question 16

Can I use the banner blocks with TypeScript?

Accepted Answer

Yes — every block is written in TypeScript with explicit interfaces for any data-driven rows (numbered announcements, carousel slides, marquee items, multi-action button rows). Types are declared at module scope so you can reuse them when wiring the banner to your CMS, feature flag provider, or backend API. Intervals and timers are fully typed with `ReturnType<typeof setInterval>` so cleanup in `useEffect` remains type-safe.

React Banner Blocks for shadcn/ui

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