属性选择器配合伪元素实现类title功能.html

<!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>
    img {
      position: relative;
      width: 150px;
      height: 150px;
    }

    p {
      position: relative;
      font-size: 16px;
    }

    p[popTitle]:hover::before {
      content: attr(popTitle);
      position: absolute;
      bottom: -20px;
      left: 10px;
      font-size: 12px;
      background: linear-gradient(#fff, #eee);
      padding: 2px 6px;
      z-index: 10;
      color: #333;
      border: 1px solid #666;
      border-radius: 5px;
      box-shadow: 1px 1px 1px 1px #999;
    }
  </style>
</head>

<body>
  <img src="./pics/pic.png" title="misaka">
  <!-- 上面图片的是原生的title -->
  <!-- 响应太慢，通常鼠标 hover 上去要隔 1s 左右才会出现这个 title 框 -->

  <p class="title" popTitle="TEXT popup">TEXT~~~~</p>
  <p class="title" popTitle="TitleA popup">TITLE-A</p>
</body>

</html>