Remove classname from element with javascript

Question

I found the following regex from another Stack Overflow question: Change an element's class with JavaScript

And have used it in part of my script with success, h

Answer 1

There is also a solution which use the word boundary metacharacter \b:

foo.className.replace(/\bbar\b/g ,'');

This can suite somebody, but be aware the word boundary occurs also between a word character [A-Za-z0-9_] and the dash - character. Therefore a class name e.g. 'different-bar-class' would also be replaced resulting in 'different--class'. However, as opposed to the above solutions, the "\b" solution doesn't remove the whitespace character \s before the class name, which may be desired, so a string e.g. 'firstbar bar' will end up as 'firstbar '.