Home >Web Front-end >JS Tutorial >How to implement DOM insertion node in JS

How to implement DOM insertion node in JS

php中世界最好的语言Original: 2018-04-08 10:55:192349browse

This time I will show you how to insert nodes into DOM using JS. What are the precautions for inserting nodes into DOM using JS? The following is a practical case, let’s take a look.

The example in this article describes the DOM insertion node operation implemented by JS. Share it with everyone for your reference, the details are as follows:

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(&#39;h&#39;,document.frm.txt.value);" />
 </form>
</body>
</html>

I believe you have mastered it after reading the case in this article For more exciting methods, please pay attention to other related articles on the php Chinese website!

How to implement DOM insertion node in JS

Related articles