css 边框动画

一个css边框动画，感兴趣的可以看看

<!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>
    * {
      margin: 0;
      padding: 0;
      list-style: none;
      --transition-duration: 500ms;
    }

    .box {
      width: 500px;
      height: 300px;
      background-color: #000;
      padding: 10px;
      position: relative;
    }

    .box::before {
      position: absolute;
      content: '';
      display: inline-block;
      top: 10px;
      left: 10px;
      width: 0;
      height: 1px;
      background-color: #fff;
      transition: all ease var(--transition-duration);
      transition-delay: 0s;
    }

    .box::after {
      position: absolute;
      content: '';
      display: inline-block;
      bottom: 10px;
      left: 10px;
      width: 0;
      height: 1px;
      background-color: #fff;
      transition: all ease var(--transition-duration);
      transition-delay: calc(var(--transition-duration)/1.25);
    }

    .box div {
      width: 100%;
      height: 100%;
      position: relative;
    }

    .content::before {
      position: absolute;
      content: '';
      display: inline-block;
      bottom: 0;
      left: 0;
      width: 1px;
      height: 0;
      background-color: #fff;
      transition: all ease var(--transition-duration);
      transition-delay: calc(var(--transition-duration)/1.25);
    }

    .content::after {
      position: absolute;
      content: '';
      display: inline-block;
      bottom: 0;
      right: 0;
      width: 1px;
      height: 0;
      background-color: #fff;
      transition: all ease var(--transition-duration);
      transition-delay: 0s;
    }

    .box:hover::after,
    .box:hover::before {
      width: 500px;
    }

    .content:hover::after,
    .content:hover::before {
      height: 100%;
    }

    .box:hover::before,
    .content:hover::after {
      transition-delay: calc(var(--transition-duration)/1.25);
    }

    .box:hover::after,
    .content:hover::before {
      transition-delay: 0s;
    }
  </style>
</head>

<body>
  <div class="box">
    <div class="content">
    </div>
  </div>
</body>

</html>

css 边框动画

明未为洺

引用和评论

vue3 基于element-plus的图片预览封装

CSS团队协作规范

前端开发工具

CSS 现在终于支持高度 auto 过渡动画了

纯CSS电梯导航！借助滚动驱动动画来实现内容和导航联动

CSS 实现带tooltip的slider

盘点CSS文本两端对齐的N种方式