vendor/assets/javascripts/webshims/shims/dom-extend.js in webshims-rails-1.14.4 vs vendor/assets/javascripts/webshims/shims/dom-extend.js in webshims-rails-1.14.5

@@ -547,11 +547,12 @@
 			var data = elementData(elem, 'implemented') || elementData(elem, 'implemented', {});
 			if(data[type]){
 				webshims.warn(type +' already implemented for element #'+elem.id);
 				return false;
 			}
+
 			data[type] = true;
-			return true;
+			return !$(elem).hasClass('ws-nopolyfill');
 		},
 		extendUNDEFProp: function(obj, props){
 			$.each(props, function(name, prop){
 				if( !(name in obj) ){
 					obj[name] = prop;