菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
body {
  counter-reset: section;           /* 重置计数器成0 */
}
h3:before {
  counter-increment: section;      /* 增加计数器值 */
  content: "Section " counter(section) ": "; /* 显示计数器 */
}
</style>
</head>
<body>

<h1>使用 CSS 计数器:</h1>
<h3>GOOGLE</h3>
<h3>RUNOOB</h3>
<h3>TAOBAO</h3>

</body>
</html>
              