22 Tailwind CSS Countdown Timers
06 / 22

All 22 in 22 Tailwind CSS Countdown Timers

  1. 01Accessible Tailwind CSS Countdown Timer with ARIA Live Region
  2. 02Pure Tailwind CSS Countdown Timer Without JavaScript
  3. 03Tailwind Session Timeout Warning Modal with Countdown
  4. 04Tailwind Circular Countdown Timer with SVG Progress Ring
  5. 05Tailwind OTP Input with Resend Code Countdown Timer
  6. 06Tailwind Rate Limit Button with Retry-After Countdown
  7. 07Tailwind Auction Countdown Timer with Anti-Snipe Extension
  8. 08Tailwind Delivery ETA Countdown with Order Tracking Steps
  9. 09Tailwind Waitlist Landing Page with Launch Countdown
  10. 10Tailwind Webinar Countdown Timer with Time Zone Display
  11. 11Tailwind Appointment Reminder Card with Countdown
  12. 12Tailwind Exam Timer with Time Remaining Warnings
  13. 13Tailwind Free Trial Countdown Banner for SaaS Apps
  14. 14Tailwind Scheduled Maintenance Countdown Status Page
  15. 15Tailwind Virtual Waiting Room Queue Countdown
  16. 16Tailwind Daily Streak Countdown Widget for Habit Apps
  17. 17Tailwind Flash Sale Countdown Timer for Product Pages
  18. 18Tailwind Sticky Announcement Bar with Countdown Timer
  19. 19Tailwind Shopping Cart Reservation Countdown Timer
  20. 20Tailwind Coming Soon Page with Launch Countdown Timer
  21. 21Tailwind Interval Workout Timer with Circular Progress
  22. 22Tailwind Retro Flip Clock Countdown Timer
Tailwind + JSMIT licensed

Tailwind Rate Limit Button with Retry-After Countdown

What a 429 Too Many Requests should look like in a UI: the button enters a cooldown derived from the Retry-After header and an amber fill drains across its label as the seconds tick away, with the response headers beside it so the number is traceable. New: a five-pip quota meter, a scrolling request log and a status-coloured header table, all from data-* variants.

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The code

<section class="tcd-06 w-full min-h-svh grid place-items-center bg-tcd06-page bg-[radial-gradient(50%_40%_at_50%_30%,var(--color-tcd06-glow),transparent_70%)] px-3 py-12 font-tcd06-mono text-tcd06-ink" aria-labelledby="tcd-06-title">
  <div class="w-full max-w-[640px] overflow-hidden rounded-xl border border-tcd06-rule bg-tcd06-panel shadow-[0_40px_80px_-40px_rgb(0_0_0/0.9)]">
    <header class="flex min-w-0 items-center gap-2.5 border-b border-tcd06-rule px-4 py-3">
      <span aria-hidden="true" class="flex gap-1.5"><span class="size-2.5 rounded-full bg-tcd06-rule"></span><span class="size-2.5 rounded-full bg-tcd06-rule"></span><span class="size-2.5 rounded-full bg-tcd06-rule"></span></span>
      <h2 id="tcd-06-title" class="ml-1 min-w-0 flex-1 text-[12.5px] font-medium tracking-[-0.01em] [overflow-wrap:anywhere]"><span class="text-tcd06-acc">POST</span> /v2/exports</h2>
      <span class="flex-none text-[10.5px] text-tcd06-mut">talon-api · staging</span>
    </header>

    <div class="flex flex-wrap items-center gap-3 border-b border-tcd06-rule p-4">
      <button type="button" data-go class="min-h-11 min-w-[168px] cursor-pointer rounded-md border border-tcd06-rule bg-[linear-gradient(var(--color-tcd06-acc-a),var(--color-tcd06-acc-a))] bg-[length:var(--fill,0%)_100%] bg-no-repeat px-4 text-[12.5px] font-semibold tabular-nums transition-[background-size,border-color,color] duration-1000 ease-linear enabled:hover:border-tcd06-acc focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-tcd06-acc disabled:cursor-not-allowed disabled:border-tcd06-acc/45 disabled:text-tcd06-acc motion-reduce:transition-none"><span data-label>Run request</span></button>
      <div class="grid min-w-0 flex-[1_1_180px] gap-1.5">
        <p role="timer" data-state class="text-[11.5px] text-tcd06-mut data-limited:text-tcd06-acc">Ready · 5 requests per minute</p>
        <div aria-hidden="true" data-pips class="flex gap-1">
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
        </div>
      </div>
    </div>

    <dl class="grid grid-cols-1 border-b border-tcd06-rule sm:grid-cols-2">
      <div class="flex justify-between gap-3 border-b border-tcd06-rule px-4 py-2.5 text-[11.5px] sm:border-r"><dt class="text-tcd06-mut">status</dt><dd data-status class="font-semibold data-[status=202]:text-tcd06-ok data-[status=429]:text-tcd06-danger">—</dd></div>
      <div class="flex justify-between gap-3 border-b border-tcd06-rule px-4 py-2.5 text-[11.5px]"><dt class="text-tcd06-mut">retry-after</dt><dd class="font-semibold"><time datetime="" data-retry>—</time></dd></div>
      <div class="flex justify-between gap-3 border-b border-tcd06-rule px-4 py-2.5 text-[11.5px] sm:border-r sm:border-b-0"><dt class="text-tcd06-mut">x-ratelimit-remaining</dt><dd data-left class="font-semibold">5</dd></div>
      <div class="flex justify-between gap-3 px-4 py-2.5 text-[11.5px]"><dt class="text-tcd06-mut">x-ratelimit-reset</dt><dd data-reset class="font-semibold">—</dd></div>
    </dl>

    <ol data-log aria-label="Request log" class="grid max-h-40 gap-1 overflow-auto bg-tcd06-page/60 px-4 py-3 text-[11.5px] leading-relaxed text-tcd06-mut">
      <li>$ waiting for first run</li>
    </ol>
    <output data-live aria-live="polite" class="sr-only"></output>
    <p class="border-t border-tcd06-rule px-4 py-3 text-[10.5px] leading-relaxed text-tcd06-mut text-pretty">Retry-After may arrive as delta-seconds or an HTTP-date. Both are parsed; a missing header falls back to a fixed 15s wait.</p>
  </div>
</section>
@import "tailwindcss";

@theme {
  --color-tcd06-page: #000000;
  --color-tcd06-page: oklch(0 0 0);
  --color-tcd06-glow: #14110a;
  --color-tcd06-glow: oklch(0.2 0.03 78);
  --color-tcd06-panel: #0c0c0e;
  --color-tcd06-panel: oklch(0.16 0.004 280);
  --color-tcd06-ink: #f4f4f5;
  --color-tcd06-ink: oklch(0.96 0.003 280);
  --color-tcd06-mut: #9a9aa3;
  --color-tcd06-mut: oklch(0.7 0.01 280);
  --color-tcd06-rule: #232328;
  --color-tcd06-rule: oklch(0.27 0.006 280);
  --color-tcd06-acc: #ffb224;
  --color-tcd06-acc: oklch(0.81 0.16 78);
  --color-tcd06-acc-a: rgb(255 178 36 / 0.22);
  --color-tcd06-danger: #ff5c5c;
  --color-tcd06-danger: oklch(0.69 0.19 25);
  --color-tcd06-ok: #4ade80;
  --color-tcd06-ok: oklch(0.82 0.17 148);
  --font-tcd06-mono: 'JetBrains Mono', ui-monospace, monospace;
}

.tcd-06 {
  width: 100%;
  min-height: 100svh;
}
(() => {
  const root = document.querySelector('.tcd-06');
  if (!root || root.dataset.wired) return;
  root.dataset.wired = '1';
  const q = (s) => root.querySelector(s);
  const go = q('[data-go]'), label = q('[data-label]'), state = q('[data-state]'), log = q('[data-log]');
  const live = q('[data-live]'), pips = [...q('[data-pips]').children], status = q('[data-status]');
  const LIMIT = 5, FALLBACK = 15;
  let left = LIMIT, id = 0, total = 0, target = 0;
  const stamp = () => new Date().toLocaleTimeString([], { hour12: false });
  const line = (t, cls) => { const li = document.createElement('li'); li.textContent = stamp() + '  ' + t; if (cls) li.className = cls; log.prepend(li); };
  const paint = () => { q('[data-left]').textContent = left; pips.forEach((p, i) => p.toggleAttribute('data-off', i >= left)); };
  const parseRetry = (v) => Number.isFinite(+v) ? +v : Number.isFinite(Date.parse(v)) ? Math.ceil((Date.parse(v) - Date.now()) / 1000) : FALLBACK;
  const tick = () => {
    const ms = Math.max(0, target - Date.now()), s = Math.ceil(ms / 1000);
    label.textContent = 'Retry in ' + s + 's';
    go.style.setProperty('--fill', (ms / total * 100).toFixed(1) + '%');
    if (ms > 0) { id = setTimeout(tick, 1000 - (Date.now() % 1000)); return; }
    go.disabled = false; label.textContent = 'Run request'; left = LIMIT; paint();
    state.removeAttribute('data-limited'); state.textContent = 'Ready · window reset';
    line('window reset · ' + LIMIT + ' requests available', 'text-tcd06-ok');
    live.textContent = 'Rate limit window reset. You can run the request again.';
  };
  go.addEventListener('click', () => {
    if (go.disabled) return;
    if (left > 0) {
      left -= 1; paint(); status.textContent = '202'; status.dataset.status = '202';
      line('202 accepted · export queued · ' + left + ' left in window');
      return;
    }
    const header = '9';
    const secs = parseRetry(header); total = secs * 1000; target = Date.now() + total;
    status.textContent = '429'; status.dataset.status = '429';
    q('[data-retry]').textContent = header; q('[data-retry]').dateTime = 'PT' + secs + 'S';
    q('[data-reset]').textContent = new Date(target).toLocaleTimeString([], { hour12: false });
    state.setAttribute('data-limited', ''); state.textContent = 'Too Many Requests · cooling down';
    line('429 too many requests · retry-after: ' + header + ' → cooldown ' + secs + 's', 'text-tcd06-danger');
    go.disabled = true; go.style.setProperty('--fill', '100%');
    live.textContent = 'Rate limited. Retry available in ' + secs + ' seconds.';
    clearTimeout(id); requestAnimationFrame(tick);
  });
  root.cleanup = () => clearTimeout(id);
})();

Setup — do this once per project

Skip this if your project already runs Tailwind v4.

1Load Tailwind
<script src="https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4"></script>

Compiles in the browser — perfect for a CodePen or a quick test, not for production.

2Add the stylesheetRequiredthe @theme block is what makes the custom utilities exist
@import "tailwindcss";

@theme {
  --color-tcd06-page: #000000;
  --color-tcd06-page: oklch(0 0 0);
  --color-tcd06-glow: #14110a;
  --color-tcd06-glow: oklch(0.2 0.03 78);
  --color-tcd06-panel: #0c0c0e;
  --color-tcd06-panel: oklch(0.16 0.004 280);
  --color-tcd06-ink: #f4f4f5;
  --color-tcd06-ink: oklch(0.96 0.003 280);
  --color-tcd06-mut: #9a9aa3;
  --color-tcd06-mut: oklch(0.7 0.01 280);
  --color-tcd06-rule: #232328;
  --color-tcd06-rule: oklch(0.27 0.006 280);
  --color-tcd06-acc: #ffb224;
  --color-tcd06-acc: oklch(0.81 0.16 78);
  --color-tcd06-acc-a: rgb(255 178 36 / 0.22);
  --color-tcd06-danger: #ff5c5c;
  --color-tcd06-danger: oklch(0.69 0.19 25);
  --color-tcd06-ok: #4ade80;
  --color-tcd06-ok: oklch(0.82 0.17 148);
  --font-tcd06-mono: 'JetBrains Mono', ui-monospace, monospace;
}

.tcd-06 {
  width: 100%;
  min-height: 100svh;
}
3Fonts used by this demooptional — skip if you have your own type stack
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap">

What changed in the port

Which parts became utilities, which stayed CSS, and why.

  • .cdt-06__go[data-cool]{background-size:var(--fill)} became an always-on bg-[length:var(--fill,0%)_100%]; the script sets --fill and the attribute selector disappeared.
  • [data-status="429"] colouring became data-[status=429]: on the cell; the disabled look became disabled: variants.
  • UI upgrade: a five-pip quota meter mirrors x-ratelimit-remaining, so the 429 is predictable instead of a surprise on the sixth click.
  • UI upgrade: the single-line <pre> became a timestamped, colour-coded request log; the headers table is a responsive two-column grid; muted text rose from 0.61 to 0.70 lightness.
  • Bug fix: the fill now starts at 100% and drains on the next frame, instead of jumping from 0% up to 100% before draining.
Paste this into ChatGPT, Claude, Cursor, or any coding assistant. The block below is pre-framed with everything the AI needs to integrate this demo into your project — markup, styles, scoping notes, and the source URL. Hit Copy and paste straight into your chat.
Here's a working CSS demo from CodeFronts. Use it as-is or adapt to your framework. All classes are scoped under a unique prefix so the code won't collide with your existing styles. MIT licensed.
Demo: Tailwind Rate Limit Button with Retry-After Countdown
Source: https://codefronts.com/snippets/tailwind-css-countdown-timers/tailwind-rate-limit-button-retry-after-countdown/

What a 429 Too Many Requests should look like in a UI: the button enters a cooldown derived from the Retry-After header and an amber fill drains across its label as the seconds tick away, with the response headers beside it so the number is traceable. New: a five-pip quota meter, a scrolling request log and a status-coloured header table, all from data-* variants.
## HTML
```html
<section class="tcd-06 w-full min-h-svh grid place-items-center bg-tcd06-page bg-[radial-gradient(50%_40%_at_50%_30%,var(--color-tcd06-glow),transparent_70%)] px-3 py-12 font-tcd06-mono text-tcd06-ink" aria-labelledby="tcd-06-title">
  <div class="w-full max-w-[640px] overflow-hidden rounded-xl border border-tcd06-rule bg-tcd06-panel shadow-[0_40px_80px_-40px_rgb(0_0_0/0.9)]">
    <header class="flex min-w-0 items-center gap-2.5 border-b border-tcd06-rule px-4 py-3">
      <span aria-hidden="true" class="flex gap-1.5"><span class="size-2.5 rounded-full bg-tcd06-rule"></span><span class="size-2.5 rounded-full bg-tcd06-rule"></span><span class="size-2.5 rounded-full bg-tcd06-rule"></span></span>
      <h2 id="tcd-06-title" class="ml-1 min-w-0 flex-1 text-[12.5px] font-medium tracking-[-0.01em] [overflow-wrap:anywhere]"><span class="text-tcd06-acc">POST</span> /v2/exports</h2>
      <span class="flex-none text-[10.5px] text-tcd06-mut">talon-api · staging</span>
    </header>

    <div class="flex flex-wrap items-center gap-3 border-b border-tcd06-rule p-4">
      <button type="button" data-go class="min-h-11 min-w-[168px] cursor-pointer rounded-md border border-tcd06-rule bg-[linear-gradient(var(--color-tcd06-acc-a),var(--color-tcd06-acc-a))] bg-[length:var(--fill,0%)_100%] bg-no-repeat px-4 text-[12.5px] font-semibold tabular-nums transition-[background-size,border-color,color] duration-1000 ease-linear enabled:hover:border-tcd06-acc focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-tcd06-acc disabled:cursor-not-allowed disabled:border-tcd06-acc/45 disabled:text-tcd06-acc motion-reduce:transition-none"><span data-label>Run request</span></button>
      <div class="grid min-w-0 flex-[1_1_180px] gap-1.5">
        <p role="timer" data-state class="text-[11.5px] text-tcd06-mut data-limited:text-tcd06-acc">Ready · 5 requests per minute</p>
        <div aria-hidden="true" data-pips class="flex gap-1">
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
          <span class="h-1.5 flex-1 rounded-full bg-tcd06-ok transition-colors data-off:bg-tcd06-rule"></span>
        </div>
      </div>
    </div>

    <dl class="grid grid-cols-1 border-b border-tcd06-rule sm:grid-cols-2">
      <div class="flex justify-between gap-3 border-b border-tcd06-rule px-4 py-2.5 text-[11.5px] sm:border-r"><dt class="text-tcd06-mut">status</dt><dd data-status class="font-semibold data-[status=202]:text-tcd06-ok data-[status=429]:text-tcd06-danger">—</dd></div>
      <div class="flex justify-between gap-3 border-b border-tcd06-rule px-4 py-2.5 text-[11.5px]"><dt class="text-tcd06-mut">retry-after</dt><dd class="font-semibold"><time datetime="" data-retry>—</time></dd></div>
      <div class="flex justify-between gap-3 border-b border-tcd06-rule px-4 py-2.5 text-[11.5px] sm:border-r sm:border-b-0"><dt class="text-tcd06-mut">x-ratelimit-remaining</dt><dd data-left class="font-semibold">5</dd></div>
      <div class="flex justify-between gap-3 px-4 py-2.5 text-[11.5px]"><dt class="text-tcd06-mut">x-ratelimit-reset</dt><dd data-reset class="font-semibold">—</dd></div>
    </dl>

    <ol data-log aria-label="Request log" class="grid max-h-40 gap-1 overflow-auto bg-tcd06-page/60 px-4 py-3 text-[11.5px] leading-relaxed text-tcd06-mut">
      <li>$ waiting for first run</li>
    </ol>
    <output data-live aria-live="polite" class="sr-only"></output>
    <p class="border-t border-tcd06-rule px-4 py-3 text-[10.5px] leading-relaxed text-tcd06-mut text-pretty">Retry-After may arrive as delta-seconds or an HTTP-date. Both are parsed; a missing header falls back to a fixed 15s wait.</p>
  </div>
</section>
```
## CSS
```css
@import "tailwindcss";

@theme {
  --color-tcd06-page: #000000;
  --color-tcd06-page: oklch(0 0 0);
  --color-tcd06-glow: #14110a;
  --color-tcd06-glow: oklch(0.2 0.03 78);
  --color-tcd06-panel: #0c0c0e;
  --color-tcd06-panel: oklch(0.16 0.004 280);
  --color-tcd06-ink: #f4f4f5;
  --color-tcd06-ink: oklch(0.96 0.003 280);
  --color-tcd06-mut: #9a9aa3;
  --color-tcd06-mut: oklch(0.7 0.01 280);
  --color-tcd06-rule: #232328;
  --color-tcd06-rule: oklch(0.27 0.006 280);
  --color-tcd06-acc: #ffb224;
  --color-tcd06-acc: oklch(0.81 0.16 78);
  --color-tcd06-acc-a: rgb(255 178 36 / 0.22);
  --color-tcd06-danger: #ff5c5c;
  --color-tcd06-danger: oklch(0.69 0.19 25);
  --color-tcd06-ok: #4ade80;
  --color-tcd06-ok: oklch(0.82 0.17 148);
  --font-tcd06-mono: 'JetBrains Mono', ui-monospace, monospace;
}

.tcd-06 {
  width: 100%;
  min-height: 100svh;
}
```

## JavaScript
```js
(() => {
  const root = document.querySelector('.tcd-06');
  if (!root || root.dataset.wired) return;
  root.dataset.wired = '1';
  const q = (s) => root.querySelector(s);
  const go = q('[data-go]'), label = q('[data-label]'), state = q('[data-state]'), log = q('[data-log]');
  const live = q('[data-live]'), pips = [...q('[data-pips]').children], status = q('[data-status]');
  const LIMIT = 5, FALLBACK = 15;
  let left = LIMIT, id = 0, total = 0, target = 0;
  const stamp = () => new Date().toLocaleTimeString([], { hour12: false });
  const line = (t, cls) => { const li = document.createElement('li'); li.textContent = stamp() + '  ' + t; if (cls) li.className = cls; log.prepend(li); };
  const paint = () => { q('[data-left]').textContent = left; pips.forEach((p, i) => p.toggleAttribute('data-off', i >= left)); };
  const parseRetry = (v) => Number.isFinite(+v) ? +v : Number.isFinite(Date.parse(v)) ? Math.ceil((Date.parse(v) - Date.now()) / 1000) : FALLBACK;
  const tick = () => {
    const ms = Math.max(0, target - Date.now()), s = Math.ceil(ms / 1000);
    label.textContent = 'Retry in ' + s + 's';
    go.style.setProperty('--fill', (ms / total * 100).toFixed(1) + '%');
    if (ms > 0) { id = setTimeout(tick, 1000 - (Date.now() % 1000)); return; }
    go.disabled = false; label.textContent = 'Run request'; left = LIMIT; paint();
    state.removeAttribute('data-limited'); state.textContent = 'Ready · window reset';
    line('window reset · ' + LIMIT + ' requests available', 'text-tcd06-ok');
    live.textContent = 'Rate limit window reset. You can run the request again.';
  };
  go.addEventListener('click', () => {
    if (go.disabled) return;
    if (left > 0) {
      left -= 1; paint(); status.textContent = '202'; status.dataset.status = '202';
      line('202 accepted · export queued · ' + left + ' left in window');
      return;
    }
    const header = '9';
    const secs = parseRetry(header); total = secs * 1000; target = Date.now() + total;
    status.textContent = '429'; status.dataset.status = '429';
    q('[data-retry]').textContent = header; q('[data-retry]').dateTime = 'PT' + secs + 'S';
    q('[data-reset]').textContent = new Date(target).toLocaleTimeString([], { hour12: false });
    state.setAttribute('data-limited', ''); state.textContent = 'Too Many Requests · cooling down';
    line('429 too many requests · retry-after: ' + header + ' → cooldown ' + secs + 's', 'text-tcd06-danger');
    go.disabled = true; go.style.setProperty('--fill', '100%');
    live.textContent = 'Rate limited. Retry available in ' + secs + ' seconds.';
    clearTimeout(id); requestAnimationFrame(tick);
  });
  root.cleanup = () => clearTimeout(id);
})();
```

How this works

The number comes from the server. When the request is rejected, the script parses Retry-After — seconds or an HTTP-date — and starts a drift-corrected countdown to that moment. The headers table shows the raw values so a developer can trace the label back to the response.

A fill that drains. The button's background is a flat amber gradient sized by a custom property:

<button class="bg-[linear-gradient(var(--color-tcd06-acc-a),var(--color-tcd06-acc-a))]
  bg-no-repeat bg-[length:var(--fill,0%)_100%]
  transition-[background-size] duration-1000 ease-linear">

Each tick sets --fill to the remaining percentage, and the one-second linear transition makes it glide.

Quota you can see. Five pips reflect x-ratelimit-remaining; the script toggles data-off on each spent pip and data-off:bg-tcd06-rule greys it.

One announcement each way. The live region speaks when the limit hits and when the window resets.

Make it yours

  • Point header at your real response.headers.get('Retry-After').
  • Change the quota with the LIMIT constant and add or remove pips.
  • Use the fallback (FALLBACK = 15) when your API omits Retry-After.
  • Retint the cooldown via --color-tcd06-acc; the fill uses its -a alpha twin.

Gotchas — read before shipping

  • Retry-After may be an HTTP-date; Number('Wed, 21 Oct…') is NaN, so parse both forms.
  • A button that only looks disabled still fires — use the real disabled attribute.
  • Do not retry automatically at zero without jitter; many clients waking together recreate the spike.
  • Transitioning background-size is not compositor-only; keep it to small controls.

Browser support

ChromeSafariFirefoxEdge
111+16.4+128+111+

Everything here is baseline on Tailwind v4's floor. color-mix() powers the /45 border modifiers.

Techniques used in this demo

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