Ticket #3408: 3408_2.patch

_source/core/htmlparser/element.js

@@ -166 +166 @@
                         {
                                 for ( a in attributes )
                                 {
-                                        writer.attribute( a, attributes[ a ] );
+                                        var value = attributes[ a ];
+
+                                        if ( filter && ( !( a = filter.onAttributeName( a ) ) || ( value = filter.onAttribute( element, a, value ) ) === false ) )
+                                                continue;
+
+                                        writer.attribute( a, value );
                                 }
                         }