fix jquery size()

README.md

@@ -475,6 +475,10 @@ Changes
 =======
 
 #### v0.2.6-dev (Development version)
+
+- update requirements to the latest versions
+- fix jQuery `size()`
+
 #### v0.2.5 (2016-03-02)
 
 - update names to respect js naming convention.

spec/utils-spec.js

@@ -67,14 +67,14 @@ describe('gridstack utils', function() {
 
             var style = $('STYLE[data-gs-style-id=' + _id + ']');
 
-            expect(style.size()).toEqual(1);
+            expect(style.length).toEqual(1);
             expect(style.prop('tagName')).toEqual('STYLE');
 
             utils.removeStylesheet(_id)
 
             style = $('STYLE[data-gs-style-id=' + _id + ']');
 
-            expect(style.size()).toEqual(0);
+            expect(style.length).toEqual(0);
         });
 
     });

src/gridstack.js

@@ -508,7 +508,7 @@
         // jscs:enable requireCamelCaseOrUpperCaseIdentifiers
 
         opts.itemClass = opts.itemClass || 'grid-stack-item';
-        var isNested = this.container.closest('.' + opts.itemClass).size() > 0;
+        var isNested = this.container.closest('.' + opts.itemClass).length > 0;
 
         this.opts = _.defaults(opts || {}, {
             width: parseInt(this.container.attr('data-gs-width')) || 12,