Synnefo

/*!

 * classie - class helper functions

 * from bonzo https://github.com/ded/bonzo

 * 

 * classie.has( elem, 'my-class' ) -> true/false

 * classie.add( elem, 'my-new-class' )

 * classie.remove( elem, 'my-unwanted-class' )

 * classie.toggle( elem, 'my-class' )

 */

/*jshint browser: true, strict: true, undef: true */

/*global define: false */

( function( window ) {

'use strict';

// class helper functions from bonzo https://github.com/ded/bonzo

function classReg( className ) {

  return new RegExp("(^|\\s+)" + className + "(\\s+|$)");

}

// classList support for class management

// altho to be fair, the api sucks because it won't accept multiple classes at once

var hasClass, addClass, removeClass;

if ( 'classList' in document.documentElement ) {

  hasClass = function( elem, c ) {

    return elem.classList.contains( c );

  };

  addClass = function( elem, c ) {

    elem.classList.add( c );

  };

  removeClass = function( elem, c ) {

    elem.classList.remove( c );

  };

}

else {

  hasClass = function( elem, c ) {

    return classReg( c ).test( elem.className );

  };

  addClass = function( elem, c ) {

    if ( !hasClass( elem, c ) ) {

      elem.className = elem.className + ' ' + c;

    }

  };

  removeClass = function( elem, c ) {

    elem.className = elem.className.replace( classReg( c ), ' ' );

  };

}

function toggleClass( elem, c ) {

  var fn = hasClass( elem, c ) ? removeClass : addClass;

  fn( elem, c );

}

var classie = {

  // full names

  hasClass: hasClass,

  addClass: addClass,

  removeClass: removeClass,

  toggleClass: toggleClass,

  // short names

  has: hasClass,

  add: addClass,

  remove: removeClass,

  toggle: toggleClass

};

// transport

if ( typeof define === 'function' && define.amd ) {

  // AMD

  define( classie );

} else {

  // browser global

  window.classie = classie;

}

})( window );