Javascript Basic Tutorial: Operation of DOM Nodes

How to create a new html element

To add a new element to the HTML DOM, you must first create the element (element node) and then add Append the element to an existing element

The following example:

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>DOM 与 CSS</title>	
</head>
<body>
	<div name="dv" id="dv">
		<p id="p1">php 中文网</p>
		<p id="p2">php.cn</p>
	</div>
	

	<script type="text/javascript">
		var para=document.createElement("p"); //创建新的<p> 元素：
		var node=document.createTextNode("欢迎学习javascript");//创建了一个文本节点
		para.appendChild(node);//必须向 <p> 元素追加这个文本节点
		var element=document.getElementById("dv");//找到一个已有的元素
		element.appendChild(para);//在已存在的元素后添加新元素
	</script>
</body>
</html>

How to delete a node

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>DOM 与 CSS</title>	
</head>
<body>
	<div name="dv" id="dv">
		<p id="p1">php 中文网</p>
		<p id="p2">php.cn</p>
		<p id="p3">js 快速入门</p>
	</div>
	

	<script type="text/javascript">
		var parent=document.getElementById("dv");//找到 id="dv" 的元素：
		var child=document.getElementById("p3"); //找到 id="p3" 的 <p> 元素：
		parent.removeChild(child);//从父元素中删除子元素
	</script>
</body>
</html>

Continuing Learning

new file

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>DOM 与 CSS</title> </head> <body> <div name="dv" id="dv"> <p id="p1">php 中文网</p> <p id="p2">php.cn</p> </div> <script type="text/javascript"> var para=document.createElement("p"); //创建新的<p> 元素： var node=document.createTextNode("欢迎学习javascript");//创建了一个文本节点 para.appendChild(node);//必须向 <p> 元素追加这个文本节点 var element=document.getElementById("dv");//找到一个已有的元素 element.appendChild(para);//在已存在的元素后添加新元素 </script> </body> </html>

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Javascript Basic Tutorial: Operation of DOM Nodes

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