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HTML DOM replaceChild() Method
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 −
<!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 −
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