flipclock/index.html at main · Adil512/flipclock · GitHub

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1" />
  <title>Flip Clock</title>
  <style>
    /* ----------------------
       Basic page layout
       ---------------------- */
    :root{
      --bg: #0f1724;
      --card: #0b1220;
      --muted: #9aa6b2;
      --accent: #00d1ff;
      --glass: rgba(255,255,255,0.03);
      --glass-2: rgba(255,255,255,0.02);
      --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    }
    html,body{
      height:100%;
      margin:0;
      font-family:var(--font-sans);
      background: linear-gradient(180deg, #071023 0%, #071827 60%);
      color:#e6eef3;
      -webkit-font-smoothing:antialiased;
      -moz-osx-font-smoothing:grayscale;
    }
    header{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:18px 28px;
      gap:12px;
      border-bottom:1px solid rgba(255,255,255,0.03);
      background: linear-gradient(180deg, rgba(255,255,255,0.01), transparent);
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
    }
    .logo {
      width:44px;
      height:44px;
      display:inline-grid;
      place-items:center;
      font-weight:700;
      color:var(--bg);
      background:linear-gradient(135deg,var(--accent),#3b82f6);
      border-radius:8px;
      box-shadow: 0 4px 18px rgba(3,7,18,0.6);
    }
    nav a {
      color:var(--muted);
      text-decoration:none;
      margin-left:18px;
      font-size:15px;
    }
    nav a:hover{ color:var(--accent); text-decoration:underline; }

    main {
      display:grid;
      grid-template-columns: 1fr 380px;
      gap:28px;
      max-width:1100px;
      margin:32px auto;
      padding:0 20px;
      align-items:start;
    }

    .card {
      background: linear-gradient(180deg,var(--card), #071226 80%);
      border-radius:12px;
      padding:22px;
      box-shadow: 0 8px 30px rgba(2,6,12,0.6);
      border: 1px solid rgba(255,255,255,0.02);
    }

    /* ----------------------
       Flip clock styles
       ---------------------- */
    .clock {
      display:flex;
      gap:12px;
      align-items:center;
      justify-content:center;
      padding:18px;
      flex-wrap:wrap;
    }

    .unit {
      --w:88px;
      width:var(--w);
      min-width:var(--w);
      perspective: 1000px;
    }

    .label {
      font-size:12px;
      color:var(--muted);
      text-align:center;
      margin-bottom:8px;
      text-transform:uppercase;
      letter-spacing:1px;
    }

    .flip-card {
      position:relative;
      height:96px;
      width:100%;
      border-radius:8px;
      overflow:visible;
    }

    .flip-inner {
      position:relative;
      height:100%;
      width:100%;
      transform-style: preserve-3d;
    }

    /* top & bottom plates */
    .plate {
      position:absolute;
      left:0; right:0;
      height:50%;
      overflow:hidden;
      backface-visibility:hidden;
      border-radius:8px;
      display:flex;
      align-items:center;
      justify-content:center;
      font-weight:700;
      font-size:40px;
      color:#0b1220;
      background:linear-gradient(180deg,#ffffff,#f0f6ff);
      box-shadow: 0 6px 18px rgba(2,6,12,0.35), inset 0 -1px rgba(0,0,0,0.06);
    }

    .plate.top {
      top:0;
      transform-origin: bottom;
      border-bottom-left-radius:0;
      border-bottom-right-radius:0;
    }

    .plate.bottom {
      bottom:0;
      transform-origin: top;
      border-top-left-radius:0;
      border-top-right-radius:0;
    }

    /* front/back halves used in animation */
    .flip {
      position:absolute;
      left:0; right:0;
      height:100%;
      transform-style:preserve-3d;
      pointer-events:none;
    }

    .flip .front,
    .flip .back {
      position:absolute;
      left:0; right:0;
      height:50%;
      display:flex;
      align-items:center;
      justify-content:center;
      backface-visibility:hidden;
      font-weight:700;
      font-size:40px;
      color:#0b1220;
      border-radius:8px;
    }
    .flip .front {
      top:0;
      transform-origin: bottom;
      background:linear-gradient(180deg,#ffffff,#eef6ff);
      box-shadow: 0 6px 18px rgba(2,6,12,0.25), inset 0 -1px rgba(0,0,0,0.03);
      border-bottom-left-radius:0;
      border-bottom-right-radius:0;
      overflow:hidden;
    }
    .flip .back {
      bottom:0;
      transform-origin: top;
      background:linear-gradient(180deg,#f6fbff,#e9f7ff);
      box-shadow: 0 -6px 18px rgba(2,6,12,0.08);
      border-top-left-radius:0;
      border-top-right-radius:0;
      transform: rotateX(180deg);
    }

    /* small separator line */
    .split {
      position:absolute;
      left:4%;
      right:4%;
      top:50%;
      height:2px;
      transform:translateY(-50%);
      background:linear-gradient(90deg, rgba(0,0,0,0.06), rgba(255,255,255,0.02));
      z-index:6;
    }

    /* Colon */
    .colon {
      color:var(--muted);
      font-size:36px;
      margin:0 6px;
      width:22px;
      text-align:center;
    }

    /* animation classes */
    .flip.animate-top .front {
      animation:foldTop 450ms ease-in forwards;
    }
    .flip.animate-top .back {
      animation:holdBack 450ms ease-in forwards;
    }
    .flip.animate-bottom .back {
      animation:unfoldBottom 450ms ease-out forwards;
    }
    .flip.animate-bottom .front {
      animation:holdFront 450ms ease-out forwards;
    }

    @keyframes foldTop {
      0% { transform: rotateX(0deg); }
      100% { transform: rotateX(-180deg); }
    }
    @keyframes unfoldBottom {
      0% { transform: rotateX(180deg); }
      100% { transform: rotateX(0deg); }
    }
    @keyframes holdBack {
      0% { transform: rotateX(180deg); opacity:0; }
      40% { transform: rotateX(180deg); opacity:1; }
      100% { transform: rotateX(180deg); opacity:1; }
    }
    @keyframes holdFront {
      0% { transform: rotateX(0deg); opacity:1; }
      60% { transform: rotateX(0deg); opacity:1; }
      100% { transform: rotateX(0deg); opacity:1; }
    }

    /* Right column: content */
    .aside {
      position:sticky;
      top:28px;
      align-self:start;
    }

    h1 {
      margin:0 0 8px 0;
      font-size:22px;
    }
    p.lead {
      margin:8px 0 16px 0;
      color:var(--muted);
      line-height:1.5;
    }
    .meta {
      font-size:13px;
      color:var(--muted);
      margin-bottom:12px;
    }
    a.cta {
      display:inline-block;
      margin-top:8px;
      padding:8px 12px;
      border-radius:8px;
      background:linear-gradient(90deg,var(--accent),#3b82f6);
      color:var(--bg);
      text-decoration:none;
      font-weight:600;
    }

    footer {
      max-width:1100px;
      margin:28px auto;
      color:var(--muted);
      font-size:14px;
      padding:0 20px 40px 20px;
      text-align:center;
    }

    /* Responsiveness */
    @media (max-width:920px){
      main{ grid-template-columns: 1fr; }
      .aside { position:relative; top:auto; }
      .unit{ --w:72px; }
      .flip-card{ height:78px; }
      .plate{ font-size:32px; height:50%; }
    }

  </style>
</head>
<body>
  <header>
    <div class="brand">
      <div class="logo">FB</div>
      <div>
        <div style="font-weight:700; font-size:16px;">Flip Clock </div>
        <div class="meta" style="margin-top:4px;">Flip Clock Online</div>
      </div>
    </div>
    <nav>
      <!-- Top menu anchor requested by user -->
      <a href="https://flipclock.io/" target="_blank" rel="noopener noreferrer">Flip Clock</a>
      <a href="#about">About</a>
      <a href="#howto">How to Use</a>
    </nav>
  </header>

  <main>
    <section class="card">
      <h1>Live Flip Clock</h1>
      <p class="lead">This flip clock shows the current local time and updates with a smooth flip animation. It is implemented using only HTML, CSS and JavaScript — perfect to include in small projects, landing pages, or teaching demos.</p>

      <div class="clock" aria-live="polite" aria-label="Flip clock showing hours minutes and seconds">
        <!-- Hours -->
        <div class="unit" data-unit="hours">
          <div class="label">Hours</div>
          <div class="flip-card" aria-hidden="false">
            <div class="flip-inner">
              <div class="plate top" id="hours-top">00</div>
              <div class="plate bottom" id="hours-bottom">00</div>

              <div class="flip" id="hours-flip" aria-hidden="true">
                <div class="front" id="hours-front">00</div>
                <div class="back" id="hours-back">00</div>
              </div>
              <div class="split"></div>
            </div>
          </div>
        </div>

        <div class="colon">:</div>

        <!-- Minutes -->
        <div class="unit" data-unit="minutes">
          <div class="label">Minutes</div>
          <div class="flip-card">
            <div class="flip-inner">
              <div class="plate top" id="mins-top">00</div>
              <div class="plate bottom" id="mins-bottom">00</div>

              <div class="flip" id="mins-flip">
                <div class="front" id="mins-front">00</div>
                <div class="back" id="mins-back">00</div>
              </div>
              <div class="split"></div>
            </div>
          </div>
        </div>

        <div class="colon">:</div>

        <!-- Seconds -->
        <div class="unit" data-unit="seconds">
          <div class="label">Seconds</div>
          <div class="flip-card">
            <div class="flip-inner">
              <div class="plate top" id="secs-top">00</div>
              <div class="plate bottom" id="secs-bottom">00</div>

              <div class="flip" id="secs-flip">
                <div class="front" id="secs-front">00</div>
                <div class="back" id="secs-back">00</div>
              </div>
              <div class="split"></div>
            </div>
          </div>
        </div>
      </div>

      <div style="margin-top:20px; color:var(--muted); font-size:13px;">
        <strong>Note:</strong> The flip animation triggers only when the corresponding value changes. Hours use 24-hour format by default.
      </div>
    </section>

    <aside class="aside">
      <div class="card">
        <h2 id="about">About Flip Clocks</h2>
        <p class="meta">What is a flip clock?</p>
        <p>Flip clocks are mechanical or digital displays where numbers 'flip' like cards to reveal the next value. They were popularized in the mid-20th century for alarm clocks and public displays. The characteristic motion — a hinged card flipping — is visually satisfying and easy to mimic with CSS 3D transforms.</p>

        <h3 style="margin-top:12px;">Real-world uses</h3>
        <ul style="color:var(--muted); line-height:1.45;">
          <li>Landing pages showing current time or countdowns.</li>
          <li>Event pages with countdown timers causing high engagement.</li>
          <li>Dashboard widgets for a retro / physical display look.</li>
        </ul>

        <a class="cta" href="https://flipclock.io/" target="_blank" rel="noopener noreferrer">Visit flipclock.io</a>

        <h3 id="howto" style="margin-top:16px;">How to adapt</h3>
        <ol style="color:var(--muted); line-height:1.5; padding-left:18px;">
          <li>Change 24/12-hour format: adapt the hours calculation in JS.</li>
          <li>Remove seconds: hide the seconds unit and stop its interval.</li>
          <li>Styling: update CSS variables at the top (accent, background).</li>
        </ol>
      </div>

      <div class="card" style="margin-top:14px;">
        <h3>Customization tips</h3>
        <p style="color:var(--muted); line-height:1.4;">
          Use `requestAnimationFrame` sparingly — this implementation uses `setInterval` for seconds for simplicity. For production use you can reduce work by updating only changed units and debouncing animation triggers.
        </p>
      </div>
    </aside>
  </main>

  <footer>
    Built with ❤
  </footer>

  <script>
    // ----------------------------
    // Flip Clock JavaScript
    // ----------------------------
    // Utility: pad with leading zero
    function pad(num) {
      return String(num).padStart(2, '0');
    }

    // Get references
    const refs = {
      hours: {
        top: document.getElementById('hours-top'),
        bottom: document.getElementById('hours-bottom'),
        flip: document.getElementById('hours-flip'),
        front: document.getElementById('hours-front'),
        back: document.getElementById('hours-back')
      },
      minutes: {
        top: document.getElementById('mins-top'),
        bottom: document.getElementById('mins-bottom'),
        flip: document.getElementById('mins-flip'),
        front: document.getElementById('mins-front'),
        back: document.getElementById('mins-back')
      },
      seconds: {
        top: document.getElementById('secs-top'),
        bottom: document.getElementById('secs-bottom'),
        flip: document.getElementById('secs-flip'),
        front: document.getElementById('secs-front'),
        back: document.getElementById('secs-back')
      }
    };

    // Current displayed values
    let current = {
      h: null,
      m: null,
      s: null
    };

    // Update a single unit with a flip animation when value changes
    function updateUnit(unitRef, newVal) {
      const topEl = unitRef.top;
      const bottomEl = unitRef.bottom;
      const flipEl = unitRef.flip;
      const frontEl = unitRef.front;
      const backEl = unitRef.back;

      const oldVal = topEl.textContent;

      if (oldVal === newVal) return; // nothing to do

      // Set up visuals for animation
      frontEl.textContent = oldVal;   // visible top (will fold)
      backEl.textContent  = newVal;   // back of flip (hidden initially)
      bottomEl.textContent = newVal;  // bottom permanent element after flip

      // Trigger top-fold animation
      flipEl.classList.remove('animate-top','animate-bottom');
      // Force reflow so that animation can play when we add classes
      void flipEl.offsetWidth;

      // animate top fold
      flipEl.classList.add('animate-top');

      // After the fold finishes (~450ms), animate bottom unfold
      setTimeout(() => {
        // Reveal the new top value
        topEl.textContent = newVal;
        // swap to bottom unfold
        flipEl.classList.remove('animate-top');
        flipEl.classList.add('animate-bottom');

        // Cleanup after animation completes
        setTimeout(() => {
          flipEl.classList.remove('animate-bottom');
          // ensure final state matches
          topEl.textContent = newVal;
          bottomEl.textContent = newVal;
          frontEl.textContent = newVal;
          backEl.textContent = newVal;
        }, 480);
      }, 230); // start bottom unfold while fold is midway for nicer effect
    }

    // Main tick: read current time and update units
    function tick() {
      const now = new Date();
      let h = now.getHours(); // 0 - 23
      let m = now.getMinutes();
      let s = now.getSeconds();

      // If you prefer 12-hour format, uncomment and adjust:
      // const is12Hour = false;
      // if (is12Hour) {
      //   h = h % 12 || 12;
      // }

      const sh = pad(h);
      const sm = pad(m);
      const ss = pad(s);

      // Update only changed units
      if (current.h !== sh) {
        updateUnit(refs.hours, sh);
        current.h = sh;
      }
      if (current.m !== sm) {
        updateUnit(refs.minutes, sm);
        current.m = sm;
      }
      if (current.s !== ss) {
        updateUnit(refs.seconds, ss);
        current.s = ss;
      }
    }

    // Initialize the clock visuals without animations
    function init() {
      const now = new Date();
      current.h = pad(now.getHours());
      current.m = pad(now.getMinutes());
      current.s = pad(now.getSeconds());

      refs.hours.top.textContent = current.h;
      refs.hours.bottom.textContent = current.h;
      refs.hours.front.textContent = current.h;
      refs.hours.back.textContent = current.h;

      refs.minutes.top.textContent = current.m;
      refs.minutes.bottom.textContent = current.m;
      refs.minutes.front.textContent = current.m;
      refs.minutes.back.textContent = current.m;

      refs.seconds.top.textContent = current.s;
      refs.seconds.bottom.textContent = current.s;
      refs.seconds.front.textContent = current.s;
      refs.seconds.back.textContent = current.s;
    }

    // Start
    init();

    // Tick every 250ms to capture transitions reliably (updates only when changed)
    setInterval(tick, 250);

    // Accessibility: allow page to announce time changes for screen readers
    // (aria-live on the .clock region helps; additional dynamic announcements can be added if needed)

  </script>
</body>
</html>