keep initial mode options

examples/masonry.html

@@ -168,18 +168,6 @@ docReady( function() {
       columnWidth: 120
     },
     getSortData: {
-      // number: function( itemElem ) {
-      //   return parseInt( getText( itemElem.querySelector('.number') ), 10 );
-      // },
-      // symbol: function( itemElem ) {
-      //   return getText( itemElem.querySelector('.symbol') );
-      // },
-      // name: function( itemElem ) {
-      //   return getText( itemElem.querySelector('.name') );
-      // },
-      // category: function( itemElem ) {
-      //   return itemElem.getAttribute('data-category');
-      // },
 
       number: '.number parseInt',
       symbol: '.symbol',
@@ -191,7 +179,6 @@ docReady( function() {
         return parseFloat( getText( itemElem.querySelector('.weight') ).replace( /[\(\)]/g, '') );
       }
 
-
     }
   });
 

isotope.js

@@ -73,8 +73,9 @@ function isotopeDefinition( Outlayer, getSize, matchesSelector, Item, layoutMode
     var LayoutMode = layoutMode.modes[ name ];
     // set mode options
     // HACK extend initial options, back-fill in default options
+    var initialOpts = this.options[ name ] || {};
     this.options[ name ] = LayoutMode.options ?
-      extend( LayoutMode.options, this.options[ name ] || {} ) : {};
+      extend( LayoutMode.options, initialOpts ) : initialOpts;
     // init layout mode instance
     this.modes[ name ] = new LayoutMode( this );
   };