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jQuery - Get and Set CSS Classes


Toggle class
With jQuery, it is easy to manipulate the style of elements.

jQuery Manipulating CSS
jQuery has several methods for CSS manipulation. We will look at the
following methods:

addClass() - Adds one or more classes to the selected elements
removeClass() - Removes one or more classes from the selected elements
toggleClass() - Toggles between adding/removing classes from the selected elements
css() - Sets or returns the style attribute


Example Stylesheet
The following stylesheet will be used for all the examples on this page:

.important
{
 
font-weight: bold;
 
font-size: xx-large;
}

.blue
{
 
color: blue;
}

jQuery addClass() Method
The following example shows how to add class attributes to different
elements. Of course you can select multiple elements, when adding classes:

Example

$("button").click(function(){
  $("h1, h2, p").addClass("blue");
  $("div").addClass("important");
});

Try it Yourself »

You can also specify multiple classes within the addClass() method:

Example

$("button").click(function(){
  $("#div1").addClass("important blue");
});

Try it Yourself »








jQuery removeClass() Method
The following example shows how to remove a specific class attribute from different
elements:

Example

$("button").click(function(){
  $("h1, h2, p").removeClass("blue");
});

Try it Yourself »


jQuery toggleClass() Method
The following example will show how to use the jQuery toggleClass() method.
This method toggles between adding/removing classes from the selected elements:

Example

$("button").click(function(){
  $("h1, h2, p").toggleClass("blue");
});

Try it Yourself »


jQuery css() Method
The jQuery css() method will be explained in the next chapter.

jQuery Exercises

Test Yourself With Exercises

Exercise:
Use a jQuery method to add the "important" class to a <p> element.


$("p").("");



Submit Answer »
Start the Exercise



jQuery CSS Reference
For a complete overview of all jQuery CSS methods, please go to our jQuery HTML/CSS Reference.












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Reference: https://www.w3schools.com/jquery/jquery_css_classes.asp