The original countdown displayed days until events. Today, JavaScript countdown libraries offer animated, real-time timers with rich features.
Countdown Timers
Tiny, dependency-free countdown library. Multiple themes included, easy customization, TypeScript support. Only ~3KB minified.
Easy to use timer/chronometer/countdown library. Works as stopwatch, countdown, or clock. Supports pause, resume, and events.
Simple countdown timer with callback support. Customizable format, auto-update, supports years to milliseconds.
Zero-dependency animated counter with easing functions. Perfect for number animations and countdowns.
Popular jQuery plugin for countdowns. Multiple display formats, timezone support, callback events, extensive theming.
jQuery countdown plugin with formatting, callbacks, and extensive options. Supports countup mode and regional formats.
Beautiful flip countdown timer. CSS-based animations, responsive design, multiple style options. Modern flip-clock aesthetic.
Customizable React countdown component. Render prop pattern, auto-restart, completion callbacks.
React<!-- HTML -->
<div class="countdown"></div>
<!-- JavaScript -->
<script src="simplyCountdown.min.js"></script>
<script>
simplyCountdown('.countdown', {
year: 2025,
month: 12,
day: 31,
hours: 23,
minutes: 59,
seconds: 59,
words: {
days: { singular: 'day', plural: 'days' },
hours: { singular: 'hour', plural: 'hours' },
minutes: { singular: 'minute', plural: 'minutes' },
seconds: { singular: 'second', plural: 'seconds' }
}
});
</script>| Feature | 1990s Script | Modern Libraries |
|---|---|---|
| Real-time update | No (page refresh) | Yes (JS) |
| Animations | None | CSS/JS effects |
| Timezone support | Server only | Client-aware |
| Mobile friendly | No | Responsive |
| Custom styling | Limited | Full CSS |
| Callbacks/Events | No | Yes |
| Precision | Days/Hours | Milliseconds |
Minimal footprint: simplyCountdown.js
Feature-rich: jQuery Countdown
React apps: react-countdown
Premium design: Flip
npm install simplycountdown.js
npm install easytimer.js
npm install react-countdown