CSS counter-reset用法及代码示例

CSS中的counter-reset属性用于为元素创建或重置CSS计数器。该属性与counter-increment属性和content属性一起使用。

用法:

counter-reset = none|name number|initial|inherit;

属性值：

none:它是默认值。此值不会重置计数器。
name number:每次出现元素时重置计数器的值。如果未指定，则默认值为0。
initial:它将counter-reset属性设置为其默认值。
inherit:元素从其父元素继承属性。

范例1：本示例使用counter-reset属性创建部分。

<!DOCTYPE html> 
<html> 
      
<head> 
      
    <!-- CSS property to set counter-reset property -->
    <style> 
          
        /* set chapter counter to 0*/ 
        body { 
            counter-reset:chapter;      
        } 
        .chapter:before { 
            content:counter(chapter) ". "; 
            display:inline; 
        } 
        .chapter { 
              
            /* Increment the chapter counter by 1, 
            same as counter-increment:chapter 1; */ 
            counter-increment:chapter; 
              
            /* set section counter to 0 */ 
            counter-reset:section;      
            font-size:20px; 
            font-weight:bold; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>GeeksforGeeks</h1> 
      
    <div class = "chapter">HTML</div> 
    <div class = "chapter">CSS</div> 
    <div class = "chapter">PHP</div> 
</body>                     
  
</html>

输出：

范例2：本示例使用counter-reset属性创建节和小节。

<!DOCTYPE html> 
<html> 
      
<head> 
      
    <!-- CSS style to create counter-reset property -->
    <style> 
        body { 
            counter-reset:section; 
        } 
        h1 { 
            counter-reset:category; 
        } 
        h1:before { 
            counter-increment:section; 
            content:"Section " counter(section) ". "; 
        } 
        h3:before { 
            counter-increment:category; 
            content:counter(section) "." counter(category) " "; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>GeeksforGeeks</h1> 
      
    <h3>HTML</h3> 
    <h3>CSS </h3> 
      
    <h1>References</h1> 
      
    <h3>HTML Tags</h3> 
    <h3>CSS Properties</h3> 
</body> 
  
</html>

输出：

支持的浏览器：下面列出了counter-reset属性支持的浏览器：

谷歌浏览器4.0
Internet Explorer 8.0
Firefox 2.0
Safari 3.1
Opera 9.6

相关用法

注：本文由纯净天空筛选整理自ChinkitManchanda大神的英文原创作品 CSS | counter-reset Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。