This time I will bring you JS operation DOM insertion node, JS operation DOM insertion node What are the precautions, the following is a practical case, let's take a look.
1 Introduction
Inserting nodes is achieved by using the insertBefore() method.
insertBefore()The method will insert a new child node before another child node.
obj.insertBefore(new,ref)
new: Represents a new child node.
ref: Specify a node and insert a new node before this node.
Second Application
Insert a node. In this example, enter the text to be inserted in the text box on the page, and then click "Insert Before" ” button inserts text into the page.
Three complete sample codes:
<!DOCTYPE html>
<html>
<head>
<title>插入节点</title>
<script language="javascript">
<!--
function crNode(str)
{
var newP=document.createElement("p");
var newTxt=document.createTextNode(str);
newP.appendChild(newTxt);
return newP;
}
function insetNode(nodeId,str)
{
var node=document.getElementById(nodeId);
var newNode=crNode(str);
if(node.parentNode) //判断是否拥有父节点
node.parentNode.insertBefore(newNode,node);
}
-->
</script>
</head>
<body>
<h2 id="h">在上面插入节点</h2>
<form id="frm" name="frm">
输入文本：<input type="text" name="txt" />
<input type="button" value="前插入" onclick="insetNode('h',document.frm.txt.value);" />
</form>
</body>
</html>I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other php Chinese websites related articles!
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