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js/classie.js

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+/*!
+ * classie v1.0.1
+ * class helper functions
+ * from bonzo https://github.com/ded/bonzo
+ * MIT license
+ * 
+ * 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, unused: true */
+/*global define: false, module: 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 if ( typeof exports === 'object' ) {
+  // CommonJS
+  module.exports = classie;
+} else {
+  // browser global
+  window.classie = classie;
+}
+
+})( window );