In this article, we will learn how CSS classes can be manipulated in HTML using jQuery. The common manipulation of classes includes actions like adding a class or removing a class from the HTML tags.
The following classes are used for the manipulations.
addClass() method: The purpose of the addClass() function is to add one or more classes to the specified element or tag.
Syntax:
$('selector expression').addClass('class name');Example: In this example, we will use addClass() method.
<!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">
<script src=
</script>
<style>
p{
border:1px solid black;
text-align: center;
padding:2rem;
margin: 2rem;
}
.bgred{
background-color: red;
}
button{
margin:0 10rem;
}
</style>
</head>
<body>
<center>
<h2 style="color:green">GeeksforGeeks</h2>
<p class="">Hi this is paragraph</p>
<button id="btn">Change background</button>
</center>
<script>
$('button').click(()=>{
$('p').addClass('bgred')
})
</script>
</body>
</html>
|
Output:
removeClass() method: We use the removeClass() function to remove one or more or all classes from the specified element or tag.
Syntax:
$('selector expression').removeClass('class name');Example: In this example, we will use the removeClass() method.
<!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">
<script src=
</script>
<style>
p{
border:1px solid black;
text-align: center;
padding:2rem;
margin: 2rem;
}
.bgred{
background-color: red;
}
button{
margin:0 10rem;
}
</style>
</head>
<body>
<center>
<h2 style="color:green">GeeksforGeeks</h2>
<p class="bgred">Hi this is paragraph</p>
<button id="btn">Change background</button>
</center>
<script>
$('button').click(()=>{
$('p').removeClass('bgred');
})
</script>
</body>
</html>
|
Output:
toggleClass() method: We use the toggleClass() function to simultaneously add or remove the class to the specified element or tag.
Syntax:
$('selector expression').addClass('class name');Example: In this example, we will use the toggleClass() method.
<!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">
<script src=
</script>
<style>
p{
border:1px solid black;
text-align: center;
padding:2rem;
margin: 2rem;
}
.bgred{
background-color: red;
}
button{
margin:0 10rem;
}
</style>
</head>
<body>
<center>
<h2 style="color:green">GeeksforGeeks</h2>
<p class="bgred">Hi, this is paragraph</p>
<button id="btn">Change background</button>
</center>
<script>
$('button').click(()=>{
$('p').toggleClass('bgred');
})
</script>
</body>
</html>
|
Output: