Jquery Get and Set Classes

jQuery - Get and Set CSS Classes
With jQuery, it is easy to manipulate the CSS 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");
 });
You can also specify multiple classes within the addClass() method:
Example
$("button").click(function(){
 $("#div1").addClass("important blue");
 });

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");
 });

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");
});

jQuery css() Method
The jQuery css() method will be explained in the next chapter.
jQuery - css() Method
jQuery css() Method
The css() method sets or returns one or more style properties for the selected elements.

Return a CSS Property
To return the value of a specified CSS property, use the following syntax:
css("propertyname");
The following example will return the background-color value of the FIRST matched element:

Example
$("p").css("background-color");

Set a CSS Property
To set a specified CSS property, use the following syntax:
css("propertyname","value");
The following example will set the background-color value for ALL matched elements:
Example
$("p").css("background-color","yellow");


Set Multiple CSS Properties
To set multiple CSS properties, use the following syntax:
css({"propertyname":"value","propertyname":"value",...});
The following example will set a background-color and a font-size for ALL matched elements:
Example
$("p").css({"background-color":"yellow","font-size":"200%"});