js method to get html page node (recursive method)-JS Tutorial-php.cn

js method to get html page node (recursive method)

高洛峰

Release： 2017-02-08 15:29:44

Original

1073 people have browsed it

I haven’t operated recursive calls in a long time. After reading it, I suddenly woke up!

The code is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>统计Element节点</title>
   <script language="javascript">
         var  elementName="";
   function countTotalElement(node)
   {
       ///Attribute  nodeType值为2，表示节点属性
    ///Comment    nodeType值为8，表示注释文本
    ///Document   nodeType值为9，表示Document
    ///DocumentFragment   nodeType值为11，表示Document片段
    ///Element            nodeType值为1，表示元素节点
    ///Text               nodeType值为3，表示文本节点
       var total=0;
    if(node.nodeType==1) //1代表节点的类型为Element
    {
       total++;
    elementName=elementName+node.tagName+"\r\n";

    }

    var childrens=node.childNodes;
    for(var i=0;i<childrens.length;i++)
    {
        total+=countTotalElement(childrens[i]);
    } 
    return total;
   }
   </script>
</head>
<body>
     <h1>测试</h1>
     <table width="100" border="2" cellpadding="0" cellspacing="0">
         <tr><td>
         <form name="form1" action="" method="post">
               <input type="text" name="ipput1" value="测试"><br />
               <input type="password" name="password" value="">
         </form>
         </td></tr>
     </table>
     <a href="javascript:void(0)" onClick="alert(&#39;标记总数&#39;+countTotalElement(document)+&#39;\r\n 全部标记如下:\r\n&#39;+elementName);">开始测试</a>
</body>
</html>

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In fact, the same effect as Baidu spider crawler can also be achieved through recursive calls! This is worth a try. Maybe you can use this method to write a sitemap generator!

For more js-related articles on how to get html page nodes (recursively), please pay attention to the PHP Chinese website!