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How to Add or Remove class in jQuery ?

  • Last Updated : 10 Aug, 2021

The addClass() or removeClass() methods are used to add the CSS classes when there is a need to add to our webpage when there is some event listener or to create some kind of effect.

In this article, let us see how can we add a CSS class or remove a CSS class in jQuery.

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Syntax:

  • Adding a class:
    $('selector').addClass(class_name);
  • Removing a class:
    $('selector').removeClass(class_name);

Example: The following example adds a class that makes the background colour black when clicked on ADD CLASS button and also removes that added class when clicked on the REMOVE CLASS button.

HTML




<!DOCTYPE html>
<html lang="en">
  
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible"
        content="IE=edge">
    <meta name="viewport" content=
        "width=device-width, initial-scale=1.0">
  
    <!-- Including jQuery  -->
    <script src=
        integrity=
"sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="
        crossorigin="anonymous">
    </script>
  
    <style>
        h1 {
            color: #006600;
        }
          
        button {
            color: white;
            background-color: #006600;
            width: auto;
            height: 30px;
        }
          
        body {
            text-align: center;
        }
          
        div {
            margin: 10px;
            height: 150px;
            width: 150px;
            position: relative;
            text-align: center;
            display: flex;
            left: 215px;
        }
          
        .bg-black {
            background-color: black;
        }
    </style>
</head>
  
<body>
    <h1>Geeks For Geeks</h1>
  
    <button id="btnadd"> ADD CLASS </button>
    <button id="btnremove"> REMOVE CLASS </button>
  
  
    <div id="GFG_IMAGE">
  
        <!-- Image added using img tag 
            with src attribute -->
        <img src=
            height='150px' width='150px'>
        <img>
    </div>
  
    <script>
        $(document).ready(function() {
            $('#btnadd').click(function() {
                $('img').addClass('bg-black');
            });
            $('#btnremove').click(function() {
                $('img').removeClass('bg-black');
            });
        });
    </script>
</body>
  
</html>

Output:

Add class and remove class




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