jQuery removeClass() Method

Remove the class name "intro" from all <p> elements:

$("button").click(function(){
$("p").removeClass("intro");
});

Definition and Usage

The removeClass() method removes one or more class names from the selected elements.

Note: If no parameter is specified, this method will remove ALL class names from the selected elements.

$(selector).removeClass(classname,function(index,currentclass))

Parameter	Description
classname	Optional. Specifies one or more class names to remove. To remove several classes, separate the class names with space Note: If this parameter is empty, all class names will be removed
function(index,currentclass)	Optional. A function that returns one or more class names to remove index - Returns the index position of the element in the set currentclass - Returns the current class name of selected elements

Change the class name of an element
How to use addClass() and removeClass() to remove one class name, and add a new class name.

Remove class using a function
Using a function to remove a class from the selected elements.

Remove several class names
How to remove several class names from the selected elements.