js method to get html page node (recursive method)
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('标记总数'+countTotalElement(document)+'\r\n 全部标记如下:\r\n'+elementName);">开始测试</a>
</body>
</html>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!
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