HTML DOM replaceChild() Method

HTMLWeb DevelopmentFront End Technology

The DOM replaceChild() method replace a child node with a new one in an HTML document.

Syntax

Following is the syntax −

node.replaceChild(newNode,oldNode);

Example

Let us see an example of replaceChild() method −

 Live Demo

<!DOCTYPE html>
<html>
<head>
<style>
   html{
      height:100%;
   }
   body{
      text-align:center;
      color:#fff;
      background: #ff7f5094;
      height:100%;
   }
   p{
      font-weight:700;
      font-size:1.2rem;
   }
   ul{
      list-style-type:none;
      padding:0;
   }
   .btn{
      background:#0197F6;
      border:none;
      height:2rem;
      border-radius:2px;
      width:35%;
      margin:2rem auto;
      display:block;
      color:#fff;
      outline:none;
      cursor:pointer;
   }
   .show{
      font-size:1.5rem;
   }
</style>
</head>
<body>
<h1>DOM replaceChild() Method Demo</h1>
<p>Hi, My favourite subjects are:</p>
<ul id="subjectList">
<li>Physics</li>
<li id="chemistry">Chemistry</li>
<li>Maths</li>
<li>English</li>
</ul>
<button onclick="changeSubject()" class='btn'>Change Physics to Biology</button>
<script>
   function changeSubject() {
      var textnode = document.createTextNode("Biology");
      var list = document.getElementById("subjectList");
      list.replaceChild(textnode, list.childNodes[0]);
   }
</script>
</body>
</html>

Output

This will produce the following output −

Click on the “blue” button to replace the first child of the subject list −

raja
Published on 22-Jul-2019 12:38:01
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