Instead of removing all classes individually using the remove class: $ ("# div"). removeClass ('class')
For each class an element can have, is there any function that can be called and remove all classes in an element?
I need this in jQuery or Javascript.
$("#div").removeClass();
Calling removeClass without parameters will remove all classes from the item.
You can also use (but not necessarily recommended, the correct path is the one above):
$("#div").removeAttr('class');
$("#div").attr('class', '');
$('#div')[0].className = '';
If you did not have jQuery, then this would be pretty much your only option:
document.getElementById('div').className = '';