jQuery Add and Remove CSS Classes

Post by **C0D3D** »

jQuery add a CSS class to the HTML elements

Example 1

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Adding a Class to the Elements in jQuery</title>
<style>
    .page-header{
        color: red;
        text-transform: uppercase;
    }
    .highlight{
        background: yellow;
    }
	.hint{
        font-style: italic;
    }        
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("h1").addClass("page-header");
        $("p.hint").addClass("highlight");
    });
});
</script>
</head>
<body>
    <h1>Demo Text</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit...</p>
    <p class="hint"><strong>Tip:</strong> Lorem Ipsum is dummy text.</p>
    <button type="button">Add Class</button>
</body>
</html>

jQuery add multiple CSS classes to the HTML elements

Example 2

Code: Select all

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Adding multiple Classes to the Elements in jQuery</title>
<style>
    .page-header{
        color: red;
        text-transform: uppercase;
    }
    .highlight{
        background: yellow;
    }
	.hint{
        font-style: italic;
    }         
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("h1").addClass("page-header highlight");
    });
});
</script>
</head>
<body>
    <h1>Hello World</h1>
    <p>The quick brown fox jumps over the lazy dog.</p>
    <button type="button">Add Class</button>
</body>
</html>

jQuery remove CSS classes from the HTML elements

Example 3

Code: Select all

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Removing Classes from the Elements in jQuery</title>
<style>
    .page-header{
        color: red;
        text-transform: uppercase;
    }
    .highlight{
        background: yellow;
    }
	.hint{
        font-style: italic;
    } 
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("h1").removeClass("page-header");
        $("p").removeClass("hint highlight");
    });
});
</script>
</head>
<body>
    <h1 class="page-header">Demo Text</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit...</p>
    <p class="hint highlight"><strong>Tip:</strong> Lorem Ipsum is dummy text.</p>
    <button type="button">Remove Class</button>
</body>
</html>

jQuery remove all the CSS classes from the HTML elements at once

Example 4

Code: Select all

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Removing All the Classes from the Elements in jQuery</title>
<style>
    .page-header{
        color: red;
        text-transform: uppercase;
    }
    .highlight{
        background: yellow;
    }
	.hint{
        font-style: italic;
    }      
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("h1").removeClass();
        $("p").removeClass();
    });
});
</script>
</head>
<body>
    <h1 class="page-header">Demo Text</h1>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit...</p>
    <p class="hint highlight"><strong>Tip:</strong> Lorem Ipsum is dummy text.</p>
    <button type="button">Remove Class</button>
</body>
</html>

jQuery toggle the CSS classes of the HTML elements

Example 5

Code: Select all

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Toggle the Classes of the Elements in jQuery</title>
<style>
    p{
        padding: 10px;
        cursor: pointer;        
        font: bold 16px sans-serif;
    }
    .highlight{
        background: yellow;
    }         
</style>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function(){
    $("p").click(function(){
        $(this).toggleClass("highlight");
    });
});
</script>
</head>
<body>
    <p>Click on me to toggle highlighting.</p>
    <p class="highlight">Click on me to toggle highlighting.</p>
    <p>Click on me to toggle highlighting.</p>
</body>
</html>

jQuery Add and Remove CSS Classes

jQuery Add and Remove CSS Classes

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