nl_tokens: The callback definition for toggleElClass .
pl_tokens: function toggleClass ( element , classToToggle , predicate ) { // This CANNOT use `classList` internally because IE does not support the // second parameter to the `classList.toggle()` method! Which is fine because // `classList` will be used by the add/remove functions. var has = hasClass ( element , classToToggle ) ; if ( typeof predicate === 'function' ) { predicate = predicate ( element , classToToggle ) ; } if ( typeof predicate !== 'boolean' ) { predicate = ! has ; } // If the necessary class operation matches the current state of the // element, no action is required. if ( predicate === has ) { return ; } if ( predicate ) { addClass ( element , classToToggle ) ; } else { removeClass ( <mask> , classToToggle ) ; } return element ; }