# With Countdown

> A banner with a live countdown timer beside the message. Build urgency for a sale, webinar, or deadline and prompt visitors to act before time runs out.

A shadcn/ui block from the [@shadcn-ui-blocks](https://www.shadcn-ui-blocks.com) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/shadcn-ui-blocks/marketing-announcement-banners-with-countdown).

- Page, with a live preview: https://shadcn.exchange/r/shadcn-ui-blocks/marketing-announcement-banners-with-countdown
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/shadcn-ui-blocks/marketing-announcement-banners-with-countdown-light-5a4d064905126bac.png
- Registry item: https://www.shadcn-ui-blocks.com/r/marketing-announcement-banners-with-countdown.json
- Listed: 2026-10-13, source last changed 2026-10-13

## Install

```bash
npx shadcn@latest add https://www.shadcn-ui-blocks.com/r/marketing-announcement-banners-with-countdown.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Dependencies

- npm packages: `class-variance-authority`, `radix-ui`

## Files

### `components/blocks/marketing/announcement-banners/with-countdown.tsx`

```tsx
import { Button } from '@/components/ui/button';
import { useEffect, useState } from 'react';

export default function WithCountdown() {
  const [timeLeft, setTimeLeft] = useState({
    hours: 24,
    minutes: 0,
    seconds: 0,
  });

  useEffect(() => {
    const timer = setInterval(() => {
      setTimeLeft((current) => {
        if (
          current.hours === 0 &&
          current.minutes === 0 &&
          current.seconds === 0
        ) {
          clearInterval(timer);
          return current;
        }

        let newSeconds = current.seconds - 1;
        let newMinutes = current.minutes;
        let newHours = current.hours;

        if (newSeconds < 0) {
          newSeconds = 59;
          newMinutes -= 1;
        }
        if (newMinutes < 0) {
          newMinutes = 59;
          newHours -= 1;
        }

        return {
          hours: newHours,
          minutes: newMinutes,
          seconds: newSeconds,
        };
      });
    }, 1000);

    return () => clearInterval(timer);
  }, []);

  return (
    <div className="bg-muted">
      <div className="container mx-auto px-4 md:px-6 2xl:max-w-[1400px]">
        <div className="flex items-center justify-between gap-x-6 p-4">
          <div className="flex w-full flex-wrap items-center justify-between gap-x-4 gap-y-2">
            <p className="text-sm font-medium">
              Flash Sale Ends in:{' '}
              <span className="font-mono">
                {String(timeLeft.hours).padStart(2, '0')}:
                {String(timeLeft.minutes).padStart(2, '0')}:
                {String(timeLeft.seconds).padStart(2, '0')}
              </span>
            </p>
            <Button size="sm" variant="default">
              Shop Now
            </Button>
          </div>
        </div>
      </div>
    </div>
  );
}
```

### `components/ui/button.tsx`

```tsx
import * as React from "react"
import { cva, type VariantProps } from "class-variance-authority"
import { Slot } from "radix-ui"

import { cn } from "@/lib/utils"

const buttonVariants = cva(
  "group/button inline-flex shrink-0 items-center justify-center rounded-md border border-transparent bg-clip-padding text-sm font-medium whitespace-nowrap transition-all outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 active:not-aria-[haspopup]:translate-y-px disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground hover:bg-primary/80",
        outline:
          "border-border bg-background shadow-xs hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:border-input dark:bg-input/30 dark:hover:bg-input/50",
        secondary:
          "bg-secondary text-secondary-foreground hover:bg-secondary/80 aria-expanded:bg-secondary aria-expanded:text-secondary-foreground",
        ghost:
          "hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:hover:bg-muted/50",
        destructive:
          "bg-destructive/10 text-destructive hover:bg-destructive/20 focus-visible:border-destructive/40 focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:hover:bg-destructive/30 dark:focus-visible:ring-destructive/40",
        link: "text-primary underline-offset-4 hover:underline",
      },
      size: {
        default:
          "h-9 gap-1.5 px-2.5 in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
        xs: "h-6 gap-1 rounded-[min(var(--radius-md),8px)] px-2 text-xs in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3",
        sm: "h-8 gap-1 rounded-[min(var(--radius-md),10px)] px-2.5 in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5",
        lg: "h-10 gap-1.5 px-2.5 has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
        icon: "size-9",
        "icon-xs":
          "size-6 rounded-[min(var(--radius-md),8px)] in-data-[slot=button-group]:rounded-md [&_svg:not([class*='size-'])]:size-3",
        "icon-sm":
          "size-8 rounded-[min(var(--radius-md),10px)] in-data-[slot=button-group]:rounded-md",
        "icon-lg": "size-10",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  }
)

function Button({
  className,
  variant = "default",
  size = "default",
  asChild = false,
  ...props
}: React.ComponentProps<"button"> &
  VariantProps<typeof buttonVariants> & {
    asChild?: boolean
  }) {
  const Comp = asChild ? Slot.Root : "button"

  return (
    <Comp
      data-slot="button"
      data-variant={variant}
      data-size={size}
      className={cn(buttonVariants({ variant, size, className }))}
      {...props}
    />
  )
}

export { Button, buttonVariants }
```