How can I remove all CSS classes using jQuery/JavaScript?

Instead of individually calling $("#item").removeClass() for every single class an element might have, is there a single function which can be called which removes all CSS classes from the given element?

Both jQuery and raw JavaScript will work.

$("#item").removeClass();

Calling removeClass with no parameters will remove all of the item’s classes.

You can also use (but it is not necessarily recommended. The correct way is the one above):

$("#item").removeAttr('class');
$("#item").attr('class', '');
$('#item')[0].className="";

If you didn’t have jQuery, then this would be pretty much your only option:

document.getElementById('item').className="";