What steps will reproduce the problem?
1. addClass, RemoveClass and toggleClass are part of the ClassList spec

What is the expected output? What do you see instead?
i.e
element.classList.addClass('myClass') throws an error in non supported 
browsers. Instead you must write:
element.addClass('myClass') that is not standard.

Further info:
https://developer.mozilla.org/en/DOM/element.classList


What version of the product are you using? On what operating system?


Please provide any additional information below.