Classie - class helper functions
Ripped from bonzo 
@ded
classie.has( element, 'my-class' ) // returns true/false
classie.add( element, 'my-new-class' ) // add new class
classie.remove( element, 'my-unwanted-class' ) // remove class
classie.toggle( element, 'my-class' ) // toggle class
Package management
Install with Bower 
bower install classie
Install with Component
component install desandro/classie
MIT license
classie is released under the MIT license.