CSS绘制的钟表效果实例页面

CSS代码：

.clock {
  --clock-width: clamp(5rem, 60vw, 20rem);
  --face-width: 88cqi;
  --radius: calc((var(--face-width) - var(--time-size)) / 2);
  --time-size: 12cqi;

  background: #222;
  block-size: var(--clock-width);
  border-radius: 1rem;
  container-type: inline-size;
  display: grid;
  font-family: ui-sans-serif, system-ui, sans-serif;
  inline-size: var(--clock-width);
  margin-inline: auto;
  place-content: center;
}

.clock-face {
  aspect-ratio: 1;
  background: #fff;
  border-radius: 50%;
  block-size: var(--face-width);
  font-size: 6cqi;
  font-weight: 700;
  inline-size: var(--face-width);
  position: relative;
}

.clock-face time {
  --x: calc(var(--radius) + (var(--radius) * cos(var(--index) * 30deg)));
  --y: calc(var(--radius) + (var(--radius) * sin(var(--index) * 30deg)));
  display: grid;
  height: var(--time-size);
  left: var(--x);
  place-content: center;
  position: absolute;
  top: var(--y);
  width: var(--time-size);
}

.clock-face time:nth-child(1) { --index: 9; }
.clock-face time:nth-child(2) { --index: 10; }
.clock-face time:nth-child(3) { --index: 11; }
.clock-face time:nth-child(4) { --index: 0; }
.clock-face time:nth-child(5) { --index: 1; }
.clock-face time:nth-child(6) { --index: 2; }
.clock-face time:nth-child(7) { --index: 3; }
.clock-face time:nth-child(8) { --index: 4; }
.clock-face time:nth-child(9) { --index: 5; }
.clock-face time:nth-child(10) { --index: 6; }
.clock-face time:nth-child(11) { --index: 7; }
.clock-face time:nth-child(12) { --index: 8; }

.arm {
  background-color: var(--_abg);
  border-radius: calc(var(--_aw) * 2);
  display: block;
  height: var(--_ah);
  left: calc((var(--face-width) - var(--_aw)) / 2);
  position: absolute;
  top: calc((var(--face-width) / 2) - var(--_ah));
  transform: rotate(0deg);
  transform-origin: bottom;
  width: var(--_aw);
}
.seconds {
  --_abg: rgb(255, 140, 5);
  --_ah: 40cqi;
  --_aw: 1cqi;
  animation: turn 60s linear infinite;
  animation-delay: var(--indexs, 0ms);
}

.minutes {
  --_abg: #333;
  --_ah: 35cqi;
  --_aw: 2cqi;
  animation: turn 3600s steps(60, end) infinite;
  animation-delay: var(--minute, 0ms);
}

.hours {
  --_abg: #333;
  --_ah: 25cqi;
  --_aw: 2.5cqi;
  animation: turn 43200s linear infinite; /* 60 * 60 * 12 */
  animation-delay: var(--hour, 0ms);
  position: relative;
}

.hours::before {
  background-color: #fff;
  border: 1cqi solid #333;
  border-radius: 50%;
  content: "";
  display: block;
  height: 4cqi;
  position: absolute;
  bottom: -3cqi;
  left: -1.75cqi;
  width: 4cqi;
}


@keyframes turn {
  to {
    transform: rotate(1turn);
  }
}

HTML代码：

<div class="clock">
  <div class="clock-face" id="app">
    <time datetime="12:00">12</time>
    <time datetime="1:00">1</time>
    <time datetime="2:00">2</time>
    <time datetime="3:00">3</time>
    <time datetime="4:00">4</time>
    <time datetime="5:00">5</time>
    <time datetime="6:00">6</time>
    <time datetime="7:00">7</time>
    <time datetime="8:00">8</time>
    <time datetime="9:00">9</time>
    <time datetime="10:00">10</time>
    <time datetime="11:00">11</time>
    <span class="arm seconds"></span>
    <span class="arm minutes"></span>
    <span class="arm hours"></span>
  </div>
</div>

JS代码：

const time = new Date();
const hour = -3600 * (time.getHours() % 12);
const mins = -60 * time.getMinutes();
app.style.setProperty('--minute', `${mins}s`);
app.style.setProperty('--hour', `${(hour+mins)}s`);