拟态时钟动画

效果展示

CSS 知识点

• box-shadow 属性灵活运用

  通过此属性来创建效果较好的仪表盘效果。

页面整体布局

<div class="clock">
  <div class="numbers">
    <span style="--i:0"><b>12b>span>
    <span style="--i:1"><b>3b>span>
    <span style="--i:2"><b>6b>span>
    <span style="--i:3"><b>9b>span>

    <div class="circle" id="hr"><i>i>div>
    <div class="circle" id="mn"><i>i>div>
    <div class="circle" id="sc"><i>i>div>
  div>
div>

编写时钟仪表盘

.clock {
  position: absolute;
  top: 50%;
  right: 220px;
  transform: translateY(-50%);
  width: 400px;
  height: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #c9d5e0;
  border-radius: 50px;
  box-shadow: 30px 30px 30px -10px rgba(0, 0, 0, 0.15), inset 15px 15px 10px
      rgba(255, 255, 255, 0.75), -15px -15px 35px rgba(255, 255, 255, 0.55), inset -1px -1px
      10px rgba(0, 0, 0, 0.2);
}

绘制时钟上的数值

.clock .numbers {
  position: absolute;
  inset: 35px;
  background: #152b4a;
  border-radius: 50%;
  box-shadow: 5px 5px 15px #152b4a66, inset 5px 5px 5px rgba(255, 255, 255, 0.55),
    -6px -6px 10px rgba(255, 255, 255, 1);
}

.clock .numbers span {
  position: absolute;
  inset: 5px;
  text-align: center;
  color: #fff;
  font-size: 1.25em;
  transform: rotate(calc(90deg * var(--i)));
}

.clock .numbers span b {
  font-weight: 600;
  display: inline-block;
  transform: rotate(calc(-90deg * var(--i)));
}

绘制时钟的指针

.clock .numbers .circle {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  z-index: 10;
}

.clock .numbers .circle i {
  position: absolute;
  width: 3px;
  height: 50%;
  background: #fff;
  transform-origin: bottom;
}

.clock .numbers .circle#hr i {
  transform: scaleY(0.5);
  width: 4px;
}

.clock .numbers .circle#mn i {
  transform: scaleY(0.65);
}

.clock .numbers .circle#sc i {
  width: 2px;
  transform: scaleY(0.7);
  background: #e91e63;
  box-shadow: 0 30px 0 #e91e63;
}

编写时钟边框(中心圆)

.clock .numbers::before {
  content: "";
  position: absolute;
  inset: 35px;
  background: linear-gradient(#2196f3, #e91e63);
  border-radius: 50%;
  animation: animate 2s linear infinite;
}

.clock .numbers::after {
  content: "";
  position: absolute;
  inset: 38px;
  background: #152b4a;
  border-radius: 50%;
}

编写时钟事件

let hr = document.querySelector("#hr");
let mn = document.querySelector("#mn");
let sc = document.querySelector("#sc");

setInterval(() => {
  let day = new Date();
  let hh = day.getHours() * 30;
  let mm = day.getMinutes() * 6;
  let ss = day.getSeconds() * 6;

  hr.style.transform = `rotateZ(${hh + mm / 12}deg)`;
  mn.style.transform = `rotateZ(${mm}deg)`;
  sc.style.transform = `rotateZ(${ss}deg)`;
}, 1000);

完整代码下载

完整代码下载