Merge pull request #1122 from stucox/revert874

Reverting PR #874

src/setClasses.js

@@ -3,7 +3,6 @@ define(['Modernizr', 'docElement'], function( Modernizr, docElement ) {
   //  ['no-webp', 'borderradius', ...]
   function setClasses( classes ) {
     var className = docElement.className;
-    var removeClasses = [];
     var regex;
     var classPrefix = Modernizr._config.classPrefix || '';
 
@@ -14,21 +13,8 @@ define(['Modernizr', 'docElement'], function( Modernizr, docElement ) {
     className = className.replace(reJS, '$1'+classPrefix+'js$2');
 
     if(Modernizr._config.enableClasses) {
-      // Need to remove any existing `no-*` classes for features we've detected
-      for(var i = 0; i < classes.length; i++) {
-        if(!classes[i].match('^no-')) {
-          removeClasses.push('no-' + classes[i]);
-        }
-      }
-
-      // Use a regex to remove the old...
-      regex = new RegExp('(^|\\s)' + removeClasses.join('|') + '(\\s|$)', 'g');
-      className = className.replace(regex, '$1$2');
-
-      // Then add the new...
+      // Add the new classes
       className += ' ' + classPrefix + classes.join(' ' + classPrefix);
-
-      // Apply
       docElement.className = className;
     }