【代码】js - 触碰 logo 字节跳动

程序员文章站 2022-05-20 14:57:08

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思路：

先把字符串取出来，转换成 span 包裹的字符
监听 mouseover 事件，添加关键帧
监听 animationend事件，移除 class

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      padding: 0;
      margin: 0;
    }

    body {
      width: 200vh;
      height: 100vh;
      /*弹性盒模型*/
      display: flex;
      /*对齐方式*/
      justify-content: center;
      align-items: center;
      background: #a29bfe;
    }

    div {
      font-size: 5em;
      font-weight: bold;
      text-transform: uppercase;
      color: #00cec9;
    }

    div>span {
      position: relative;
      display: inline-block;
    }

    .color {
      /*关键帧名*/
      animation-name: color;
      /*过程时间*/
      animation-duration: 1s;
      /*重复次数*/
      animation-iteration-count: 1;
      /*动画方式*/
      animation-timing-function: linear;
      /*动画来回切换*/
      animation-direction: alternate;
    }

    @keyframes color {
      50% {
        color: #ffeaa7;
        /*缩放x2*/
        transform: scale(2);
      }

      to {
        color: #fd79a8;
        transform: scale(0.5);
      }
    }
  </style>
</head>

<body>
  <div>lawsssscat</div>
</body>
<script>
  const div = document.querySelector('div');
  [...div.textContent].reduce((previous, current, index) => {
    // 替换字符
    previous == index && (div.innerHTML = "");
    let span = document.createElement('span');
    span.innerHTML = current;
    div.appendChild(span);
    // 动画开始
    span.addEventListener('mouseover', (e) => {
      e.target.classList.add('color')
    })
    // 动画结束
    span.addEventListener('animationend', (e) => {
      e.target.classList.remove('color');
    })
  }, 0);
</script>

</html>