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home / developersection / forums / how can i change an element's class with javascript, please provide sample?
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Utpal Vishwas
Utpal Vishwas

Student

I am Utpal Vishwas from Uttar Pradesh. Have completed my B. Tech. course from MNNIT campus Prayagraj in 2022. I have good knowledge of computer networking.

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1 Answers

Aryan Kumar
Aryan Kumar 01 Aug 2023
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Sure, here is how to change an element's class with JavaScript:

JavaScript

// Get the element
var element = document.getElementById("myElement");

// Get the current classes
var currentClasses = element.classList;

// Add the new class
currentClasses.add("new-class");

// Remove the old class
currentClasses.remove("old-class");

The element variable will contain a reference to the element whose class you want to change. The classList property of the element variable will contain an array of the element's current classes. The add() method of the classList property will add a new class to the element. The remove() method of the classList property will remove a class from the element.

Here is an example of how to use this code:

HTML

<html>
<body>

<div id="myElement" class="my-class">This is my element</div>

<script>
// Get the element
var element = document.getElementById("myElement");

// Get the current classes
var currentClasses = element.classList;

// Add the new class
currentClasses.add("new-class");

// Remove the old class
currentClasses.remove("my-class");
</script>

</body>
</html>

This code will create a div element with the class "my-class". The console.log() method will print the element's current classes to the console. After the code is executed, the element will have the class "new-class" and will no longer have the class "my-class".

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