diff --git a/dist/gridstack.js b/dist/gridstack.js
index a6762a4..7a50646 100644
--- a/dist/gridstack.js
+++ b/dist/gridstack.js
@@ -3,52 +3,53 @@
 //     (c) 2014-2015 Pavel Reznikov
 //     gridstack.js may be freely distributed under the MIT license.
 
-(function (factory) {
+(function(factory) {
     if (typeof define === 'function' && define.amd) {
-        define(['jquery', 'lodash', 'jquery-ui/core', 'jquery-ui/widget', 'jquery-ui/mouse', 'jquery-ui/draggable', 'jquery-ui/resizable'], factory);
+        define(['jquery', 'lodash', 'jquery-ui/core', 'jquery-ui/widget', 'jquery-ui/mouse', 'jquery-ui/draggable',
+            'jquery-ui/resizable'], factory);
     }
     else {
         factory(jQuery, _);
     }
-})(function ($, _) {
+})(function($, _) {
 
     var scope = window;
 
     var Utils = {
-        is_intercepted: function (a, b) {
+        is_intercepted: function(a, b) {
             return !(a.x + a.width <= b.x || b.x + b.width <= a.x || a.y + a.height <= b.y || b.y + b.height <= a.y);
         },
 
-        sort: function (nodes, dir, width) {
-            width = width || _.chain(nodes).map(function (node) { return node.x + node.width; }).max().value();
+        sort: function(nodes, dir, width) {
+            width = width || _.chain(nodes).map(function(node) { return node.x + node.width; }).max().value();
             dir = dir != -1 ? 1 : -1;
-            return _.sortBy(nodes, function (n) { return dir * (n.x + n.y * width); });
+            return _.sortBy(nodes, function(n) { return dir * (n.x + n.y * width); });
         },
 
-        create_stylesheet: function (id) {
-            var style = document.createElement("style");
-            style.setAttribute("type", "text/css");
-            style.setAttribute("data-gs-id", id);
+        create_stylesheet: function(id) {
+            var style = document.createElement('style');
+            style.setAttribute('type', 'text/css');
+            style.setAttribute('data-gs-id', id);
             if (style.styleSheet) {
-                style.styleSheet.cssText = "";
+                style.styleSheet.cssText = '';
             }
             else {
-                style.appendChild(document.createTextNode(""));
+                style.appendChild(document.createTextNode(''));
             }
             document.getElementsByTagName('head')[0].appendChild(style);
             return style.sheet;
         },
 
-        insert_css_rule: function (sheet, selector, rules, index) {
-            if(typeof sheet.insertRule === 'function') {
-                sheet.insertRule(selector + "{" + rules + "}", index);
+        insert_css_rule: function(sheet, selector, rules, index) {
+            if (typeof sheet.insertRule === 'function') {
+                sheet.insertRule(selector + '{' + rules + '}', index);
             }
-            else if(typeof sheet.addRule === 'function') {
+            else if (typeof sheet.addRule === 'function') {
                 sheet.addRule(selector, rules, index);
             }
         },
 
-        toBool: function (v) {
+        toBool: function(v) {
             if (typeof v == 'boolean')
                 return v;
             if (typeof v == 'string') {
@@ -61,24 +62,24 @@
 
     var id_seq = 0;
 
-    var GridStackEngine = function (width, onchange, float, height, items) {
+    var GridStackEngine = function(width, onchange, float, height, items) {
         this.width = width;
         this.float = float || false;
         this.height = height || 0;
 
         this.nodes = items || [];
-        this.onchange = onchange || function () {};
+        this.onchange = onchange || function() {};
 
         this._update_counter = 0;
         this._float = this.float;
     };
 
-    GridStackEngine.prototype.batch_update = function () {
+    GridStackEngine.prototype.batch_update = function() {
         this._update_counter = 1;
         this.float = true;
     };
 
-    GridStackEngine.prototype.commit = function () {
+    GridStackEngine.prototype.commit = function() {
         this._update_counter = 0;
         if (this._update_counter == 0) {
             this.float = this._float;
@@ -87,16 +88,16 @@
         }
     };
 
-    GridStackEngine.prototype._fix_collisions = function (node) {
+    GridStackEngine.prototype._fix_collisions = function(node) {
         this._sort_nodes(-1);
 
-        var nn = node, has_locked = Boolean(_.find(this.nodes, function (n) { return n.locked }));
+        var nn = node, has_locked = Boolean(_.find(this.nodes, function(n) { return n.locked }));
         if (!this.float && !has_locked) {
             nn = {x: 0, y: node.y, width: this.width, height: node.height};
         }
 
         while (true) {
-            var collision_node = _.find(this.nodes, function (n) {
+            var collision_node = _.find(this.nodes, function(n) {
                 return n != node && Utils.is_intercepted(n, nn);
             }, this);
             if (typeof collision_node == 'undefined') {
@@ -107,31 +108,32 @@
         }
     };
 
-    GridStackEngine.prototype.is_area_empty = function (x, y, width, height) {
+    GridStackEngine.prototype.is_area_empty = function(x, y, width, height) {
         var nn = {x: x || 0, y: y || 0, width: width || 1, height: height || 1};
-        var collision_node = _.find(this.nodes, function (n) {
+        var collision_node = _.find(this.nodes, function(n) {
             return Utils.is_intercepted(n, nn);
         }, this);
         return collision_node == null;
     };
 
-    GridStackEngine.prototype._sort_nodes = function (dir) {
+    GridStackEngine.prototype._sort_nodes = function(dir) {
         this.nodes = Utils.sort(this.nodes, dir, this.width);
     };
 
-    GridStackEngine.prototype._pack_nodes = function () {
+    GridStackEngine.prototype._pack_nodes = function() {
         this._sort_nodes();
 
         if (this.float) {
-            _.each(this.nodes, function (n, i) {
+            _.each(this.nodes, function(n, i) {
                 if (n._updating || typeof n._orig_y == 'undefined' || n.y == n._orig_y)
                     return;
 
                 var new_y = n.y;
                 while (new_y >= n._orig_y) {
                     var collision_node = _.chain(this.nodes)
-                        .find(function (bn) {
-                            return n != bn && Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
+                        .find(function(bn) {
+                            return n != bn &&
+                                Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
                         })
                         .value();
 
@@ -144,7 +146,7 @@
             }, this);
         }
         else {
-            _.each(this.nodes, function (n, i) {
+            _.each(this.nodes, function(n, i) {
                 if (n.locked)
                     return;
                 while (n.y > 0) {
@@ -154,7 +156,7 @@
                     if (i > 0) {
                         var collision_node = _.chain(this.nodes)
                             .take(i)
-                            .find(function (bn) {
+                            .find(function(bn) {
                                 return Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
                             })
                             .value();
@@ -171,7 +173,7 @@
         }
     };
 
-    GridStackEngine.prototype._prepare_node = function (node, resizing) {
+    GridStackEngine.prototype._prepare_node = function(node, resizing) {
         node = _.defaults(node || {}, {width: 1, height: 1, x: 0, y: 0 });
 
         node.x = parseInt('' + node.x);
@@ -213,7 +215,7 @@
         return node;
     };
 
-    GridStackEngine.prototype._notify = function () {
+    GridStackEngine.prototype._notify = function() {
         if (this._update_counter) {
             return;
         }
@@ -222,12 +224,12 @@
         this.onchange(deleted_nodes);
     };
 
-    GridStackEngine.prototype.clean_nodes = function () {
-        _.each(this.nodes, function (n) {n._dirty = false });
+    GridStackEngine.prototype.clean_nodes = function() {
+        _.each(this.nodes, function(n) {n._dirty = false });
     };
 
-    GridStackEngine.prototype.get_dirty_nodes = function () {
-        return _.filter(this.nodes, function (n) { return n._dirty; });
+    GridStackEngine.prototype.get_dirty_nodes = function() {
+        return _.filter(this.nodes, function(n) { return n._dirty; });
     };
 
     GridStackEngine.prototype.add_node = function(node) {
@@ -244,12 +246,12 @@
         if (node.auto_position) {
             this._sort_nodes();
 
-            for (var i = 0; ; ++i) {
+            for (var i = 0;; ++i) {
                 var x = i % this.width, y = Math.floor(i / this.width);
                 if (x + node.width > this.width) {
                     continue;
                 }
-                if (!_.find(this.nodes, function (n) {
+                if (!_.find(this.nodes, function(n) {
                     return Utils.is_intercepted({x: x, y: y, width: node.width, height: node.height}, n);
                 })) {
                     node.x = x;
@@ -267,15 +269,15 @@
         return node;
     };
 
-    GridStackEngine.prototype.remove_node = function (node) {
+    GridStackEngine.prototype.remove_node = function(node) {
         node._id = null;
         this.nodes = _.without(this.nodes, node);
         this._pack_nodes();
         this._notify(node);
     };
 
-    GridStackEngine.prototype.can_move_node = function (node, x, y, width, height) {
-        var has_locked = Boolean(_.find(this.nodes, function (n) { return n.locked }));
+    GridStackEngine.prototype.can_move_node = function(node, x, y, width, height) {
+        var has_locked = Boolean(_.find(this.nodes, function(n) { return n.locked }));
 
         if (!this.height && !has_locked)
             return true;
@@ -286,21 +288,29 @@
             null,
             this.float,
             0,
-            _.map(this.nodes, function (n) { if (n == node) { cloned_node = $.extend({}, n); return cloned_node; } return $.extend({}, n) }));
+            _.map(this.nodes, function(n) {
+                if (n == node) {
+                    cloned_node = $.extend({}, n);
+                    return cloned_node;
+                }
+                return $.extend({}, n);
+            }));
 
         clone.move_node(cloned_node, x, y, width, height);
 
         var res = true;
 
         if (has_locked)
-            res &= !Boolean(_.find(clone.nodes, function (n) { return n != cloned_node && Boolean(n.locked) && Boolean(n._dirty); }));
+            res &= !Boolean(_.find(clone.nodes, function(n) {
+                return n != cloned_node && Boolean(n.locked) && Boolean(n._dirty);
+            }));
         if (this.height)
             res &= clone.get_grid_height() <= this.height;
 
         return res;
     };
 
-    GridStackEngine.prototype.can_be_placed_with_respect_to_height = function (node) {
+    GridStackEngine.prototype.can_be_placed_with_respect_to_height = function(node) {
         if (!this.height)
             return true;
 
@@ -309,12 +319,12 @@
             null,
             this.float,
             0,
-            _.map(this.nodes, function (n) { return $.extend({}, n) }));
+            _.map(this.nodes, function(n) { return $.extend({}, n) }));
         clone.add_node(node);
         return clone.get_grid_height() <= this.height;
     };
 
-    GridStackEngine.prototype.move_node = function (node, x, y, width, height, no_pack) {
+    GridStackEngine.prototype.move_node = function(node, x, y, width, height, no_pack) {
         if (typeof x != 'number') x = node.x;
         if (typeof y != 'number') y = node.y;
         if (typeof width != 'number') width = node.width;
@@ -347,28 +357,28 @@
         return node;
     };
 
-    GridStackEngine.prototype.get_grid_height = function () {
-        return _.reduce(this.nodes, function (memo, n) { return Math.max(memo, n.y + n.height); }, 0);
+    GridStackEngine.prototype.get_grid_height = function() {
+        return _.reduce(this.nodes, function(memo, n) { return Math.max(memo, n.y + n.height); }, 0);
     };
 
-    GridStackEngine.prototype.begin_update = function (node) {
-        _.each(this.nodes, function (n) {
+    GridStackEngine.prototype.begin_update = function(node) {
+        _.each(this.nodes, function(n) {
             n._orig_y = n.y;
         });
         node._updating = true;
     };
 
-    GridStackEngine.prototype.end_update = function () {
-        _.each(this.nodes, function (n) {
+    GridStackEngine.prototype.end_update = function() {
+        _.each(this.nodes, function(n) {
             n._orig_y = n.y;
         });
-        var n = _.find(this.nodes, function (n) { return n._updating; });
+        var n = _.find(this.nodes, function(n) { return n._updating; });
         if (n) {
             n._updating = false;
         }
     };
 
-    var GridStack = function (el, opts) {
+    var GridStack = function(el, opts) {
         var self = this, one_column_mode;
 
         this.container = $(el);
@@ -409,9 +419,9 @@
 
         this._init_styles();
 
-        this.grid = new GridStackEngine(this.opts.width, function (nodes) {
+        this.grid = new GridStackEngine(this.opts.width, function(nodes) {
             var max_height = 0;
-            _.each(nodes, function (n) {
+            _.each(nodes, function(n) {
                 if (n._id == null) {
                     n.el.remove();
                 }
@@ -430,24 +440,29 @@
         if (this.opts.auto) {
             var elements = [];
             var _this = this;
-            this.container.children('.' + this.opts.item_class).each(function (index, el) {
+            this.container.children('.' + this.opts.item_class).each(function(index, el) {
                 el = $(el);
                 elements.push({
                     el: el,
-                    i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * _this.opts.width // Use opts.width as weight for Y
+                    i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * _this.opts.width
                 });
             });
-            _.chain(elements).sortBy(function (x) { return x.i; }).each(function (i) {
+            _.chain(elements).sortBy(function(x) { return x.i; }).each(function(i) {
                 self._prepare_element(i.el);
             }).value();
         }
 
         this.set_animation(this.opts.animate);
 
-        this.placeholder = $('<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '"><div class="placeholder-content" /></div>').hide();
-        this.container.height((this.grid.get_grid_height()) * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
+        this.placeholder = $(
+            '<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '">' +
+            '<div class="placeholder-content" /></div>').hide();
 
-        var on_resize_handler = function () {
+        this.container.height(
+            this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) -
+            this.opts.vertical_margin);
+
+        var on_resize_handler = function() {
             if (self._is_one_column_mode()) {
                 if (one_column_mode)
                     return;
@@ -455,7 +470,7 @@
                 one_column_mode = true;
 
                 self.grid._sort_nodes();
-                _.each(self.grid.nodes, function (node) {
+                _.each(self.grid.nodes, function(node) {
                     self.container.append(node.el);
 
                     if (!node.no_move) {
@@ -472,7 +487,7 @@
 
                 one_column_mode = false;
 
-                _.each(self.grid.nodes, function (node) {
+                _.each(self.grid.nodes, function(node) {
                     if (!node.no_move) {
                         node.el.draggable('enable');
                     }
@@ -487,7 +502,7 @@
         on_resize_handler();
     };
 
-    GridStack.prototype._init_styles = function () {
+    GridStack.prototype._init_styles = function() {
         if (this._styles_id) {
             $('[data-gs-id="' + this._styles_id + '"]').remove();
         }
@@ -497,7 +512,7 @@
             this._styles._max = 0;
     };
 
-    GridStack.prototype._update_styles = function (max_height) {
+    GridStack.prototype._update_styles = function(max_height) {
         if (this._styles == null) {
             return;
         }
@@ -541,18 +556,21 @@
         }
     };
 
-    GridStack.prototype._update_container_height = function () {
+    GridStack.prototype._update_container_height = function() {
         if (this.grid._update_counter) {
             return;
         }
-        this.container.height(this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
+        this.container.height(
+            this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) -
+            this.opts.vertical_margin);
     };
 
-    GridStack.prototype._is_one_column_mode = function () {
-        return (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) <= this.opts.min_width;
+    GridStack.prototype._is_one_column_mode = function() {
+        return (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) <=
+            this.opts.min_width;
     };
 
-    GridStack.prototype._prepare_element = function (el) {
+    GridStack.prototype._prepare_element = function(el) {
         var self = this;
         el = $(el);
 
@@ -577,7 +595,7 @@
 
         var cell_width, cell_height;
 
-        var on_start_moving = function (event, ui) {
+        var on_start_moving = function(event, ui) {
             self.container.append(self.placeholder);
             var o = $(this);
             self.grid.clean_nodes();
@@ -596,7 +614,7 @@
             el.resizable('option', 'minHeight', self.opts.cell_height * (node.min_height || 1));
         };
 
-        var on_end_moving = function (event, ui) {
+        var on_end_moving = function(event, ui) {
             self.placeholder.detach();
             var o = $(this);
             node.el = o;
@@ -618,9 +636,9 @@
         el.draggable(_.extend(this.opts.draggable, {
             start: on_start_moving,
             stop: on_end_moving,
-            drag: function (event, ui) {
+            drag: function(event, ui) {
                 var x = Math.round(ui.position.left / cell_width),
-                    y = Math.floor((ui.position.top + cell_height/2) / cell_height);
+                    y = Math.floor((ui.position.top + cell_height / 2) / cell_height);
                 if (!self.grid.can_move_node(node, x, y, node.width, node.height)) {
                     return;
                 }
@@ -631,9 +649,9 @@
         })).resizable(_.extend(this.opts.resizable, {
             start: on_start_moving,
             stop: on_end_moving,
-            resize: function (event, ui) {
+            resize: function(event, ui) {
                 var x = Math.round(ui.position.left / cell_width),
-                    y = Math.floor((ui.position.top + cell_height/2) / cell_height),
+                    y = Math.floor((ui.position.top + cell_height / 2) / cell_height),
                     width = Math.round(ui.size.width / cell_width),
                     height = Math.round(ui.size.height / cell_height);
                 if (!self.grid.can_move_node(node, x, y, width, height)) {
@@ -655,7 +673,7 @@
         el.attr('data-gs-locked', node.locked ? 'yes' : null);
     };
 
-    GridStack.prototype.set_animation = function (enable) {
+    GridStack.prototype.set_animation = function(enable) {
         if (enable) {
             this.container.addClass('grid-stack-animate');
         }
@@ -664,7 +682,7 @@
         }
     };
 
-    GridStack.prototype.add_widget = function (el, x, y, width, height, auto_position) {
+    GridStack.prototype.add_widget = function(el, x, y, width, height, auto_position) {
         el = $(el);
         if (typeof x != 'undefined') el.attr('data-gs-x', x);
         if (typeof y != 'undefined') el.attr('data-gs-y', y);
@@ -678,12 +696,12 @@
         return el;
     };
 
-    GridStack.prototype.will_it_fit = function (x, y, width, height, auto_position) {
+    GridStack.prototype.will_it_fit = function(x, y, width, height, auto_position) {
         var node = {x: x, y: y, width: width, height: height, auto_position: auto_position};
         return this.grid.can_be_placed_with_respect_to_height(node);
     };
 
-    GridStack.prototype.remove_widget = function (el, detach_node) {
+    GridStack.prototype.remove_widget = function(el, detach_node) {
         detach_node = typeof detach_node === 'undefined' ? true : detach_node;
         el = $(el);
         var node = el.data('_gridstack_node');
@@ -694,17 +712,17 @@
             el.remove();
     };
 
-    GridStack.prototype.remove_all = function (detach_node) {
-        _.each(this.grid.nodes, function (node) {
+    GridStack.prototype.remove_all = function(detach_node) {
+        _.each(this.grid.nodes, function(node) {
             this.remove_widget(node.el, detach_node);
         }, this);
         this.grid.nodes = [];
         this._update_container_height();
     };
 
-    GridStack.prototype.resizable = function (el, val) {
+    GridStack.prototype.resizable = function(el, val) {
         el = $(el);
-        el.each(function (index, el) {
+        el.each(function(index, el) {
             el = $(el);
             var node = el.data('_gridstack_node');
             if (typeof node == 'undefined' || node == null) {
@@ -722,9 +740,9 @@
         return this;
     };
 
-    GridStack.prototype.movable = function (el, val) {
+    GridStack.prototype.movable = function(el, val) {
         el = $(el);
-        el.each(function (index, el) {
+        el.each(function(index, el) {
             el = $(el);
             var node = el.data('_gridstack_node');
             if (typeof node == 'undefined' || node == null) {
@@ -742,19 +760,19 @@
         return this;
     };
 
-    GridStack.prototype.disable = function () {
+    GridStack.prototype.disable = function() {
         this.movable(this.container.children('.' + this.opts.item_class), false);
         this.resizable(this.container.children('.' + this.opts.item_class), false);
     };
 
-    GridStack.prototype.enable = function () {
+    GridStack.prototype.enable = function() {
         this.movable(this.container.children('.' + this.opts.item_class), true);
         this.resizable(this.container.children('.' + this.opts.item_class), true);
     };
 
-    GridStack.prototype.locked = function (el, val) {
+    GridStack.prototype.locked = function(el, val) {
         el = $(el);
-        el.each(function (index, el) {
+        el.each(function(index, el) {
             el = $(el);
             var node = el.data('_gridstack_node');
             if (typeof node == 'undefined' || node == null) {
@@ -767,7 +785,7 @@
         return this;
     };
 
-    GridStack.prototype._update_element = function (el, callback) {
+    GridStack.prototype._update_element = function(el, callback) {
         el = $(el).first();
         var node = el.data('_gridstack_node');
         if (typeof node == 'undefined' || node == null) {
@@ -789,8 +807,8 @@
         self.grid.end_update();
     };
 
-    GridStack.prototype.resize = function (el, width, height) {
-        this._update_element(el, function (el, node) {
+    GridStack.prototype.resize = function(el, width, height) {
+        this._update_element(el, function(el, node) {
             width = (width != null && typeof width != 'undefined') ? width : node.width;
             height = (height != null && typeof height != 'undefined') ? height : node.height;
 
@@ -798,8 +816,8 @@
         });
     };
 
-    GridStack.prototype.move = function (el, x, y) {
-        this._update_element(el, function (el, node) {
+    GridStack.prototype.move = function(el, x, y) {
+        this._update_element(el, function(el, node) {
             x = (x != null && typeof x != 'undefined') ? x : node.x;
             y = (y != null && typeof y != 'undefined') ? y : node.y;
 
@@ -807,8 +825,8 @@
         });
     };
 
-    GridStack.prototype.update = function (el, x, y, width, height) {
-        this._update_element(el, function (el, node) {
+    GridStack.prototype.update = function(el, x, y, width, height) {
+        this._update_element(el, function(el, node) {
             x = (x != null && typeof x != 'undefined') ? x : node.x;
             y = (y != null && typeof y != 'undefined') ? y : node.y;
             width = (width != null && typeof width != 'undefined') ? width : node.width;
@@ -818,7 +836,7 @@
         });
     };
 
-    GridStack.prototype.cell_height = function (val) {
+    GridStack.prototype.cell_height = function(val) {
         if (typeof val == 'undefined') {
             return this.opts.cell_height;
         }
@@ -829,7 +847,7 @@
         this._update_styles();
     };
 
-    GridStack.prototype.cell_width = function () {
+    GridStack.prototype.cell_width = function() {
         var o = this.container.children('.' + this.opts.item_class).first();
         return Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
     };
@@ -845,16 +863,16 @@
         return {x: Math.floor(relativeLeft / column_width), y: Math.floor(relativeTop / row_height)};
     };
 
-    GridStack.prototype.batch_update = function () {
+    GridStack.prototype.batch_update = function() {
         this.grid.batch_update();
     };
 
-    GridStack.prototype.commit = function () {
+    GridStack.prototype.commit = function() {
         this.grid.commit();
-        this._update_container_height()
+        this._update_container_height();
     };
 
-    GridStack.prototype.is_area_empty = function (x, y, width, height) {
+    GridStack.prototype.is_area_empty = function(x, y, width, height) {
         return this.grid.is_area_empty(x, y, width, height);
     };
 
@@ -862,8 +880,8 @@
 
     scope.GridStackUI.Utils = Utils;
 
-    $.fn.gridstack = function (opts) {
-        return this.each(function () {
+    $.fn.gridstack = function(opts) {
+        return this.each(function() {
             if (!$(this).data('gridstack')) {
                 $(this).data('gridstack', new GridStack(this, opts));
             }
diff --git a/dist/gridstack.min.map b/dist/gridstack.min.map
index bfb26df..9951f12 100644
--- a/dist/gridstack.min.map
+++ b/dist/gridstack.min.map
@@ -1 +1 @@
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,EAAMkN,YAAYhN,MAAQA,EAE1BH,EAAEoN,GAAGC,UAAY,SAASjG,GACtB,MAAOpE,MAAKiB,KAAK,WACRjE,EAAEgD,MAAMsH,KAAK,cACdtK,EAAEgD,MAAMsH,KAAK,YAAa,GAAIpD,GAAUlE,KAAMoE,OAKnDnH,EAAMkN"}
\ No newline at end of file
diff --git a/src/gridstack.js b/src/gridstack.js
index a6762a4..7a50646 100644
--- a/src/gridstack.js
+++ b/src/gridstack.js
@@ -3,52 +3,53 @@
 //     (c) 2014-2015 Pavel Reznikov
 //     gridstack.js may be freely distributed under the MIT license.
 
-(function (factory) {
+(function(factory) {
     if (typeof define === 'function' && define.amd) {
-        define(['jquery', 'lodash', 'jquery-ui/core', 'jquery-ui/widget', 'jquery-ui/mouse', 'jquery-ui/draggable', 'jquery-ui/resizable'], factory);
+        define(['jquery', 'lodash', 'jquery-ui/core', 'jquery-ui/widget', 'jquery-ui/mouse', 'jquery-ui/draggable',
+            'jquery-ui/resizable'], factory);
     }
     else {
         factory(jQuery, _);
     }
-})(function ($, _) {
+})(function($, _) {
 
     var scope = window;
 
     var Utils = {
-        is_intercepted: function (a, b) {
+        is_intercepted: function(a, b) {
             return !(a.x + a.width <= b.x || b.x + b.width <= a.x || a.y + a.height <= b.y || b.y + b.height <= a.y);
         },
 
-        sort: function (nodes, dir, width) {
-            width = width || _.chain(nodes).map(function (node) { return node.x + node.width; }).max().value();
+        sort: function(nodes, dir, width) {
+            width = width || _.chain(nodes).map(function(node) { return node.x + node.width; }).max().value();
             dir = dir != -1 ? 1 : -1;
-            return _.sortBy(nodes, function (n) { return dir * (n.x + n.y * width); });
+            return _.sortBy(nodes, function(n) { return dir * (n.x + n.y * width); });
         },
 
-        create_stylesheet: function (id) {
-            var style = document.createElement("style");
-            style.setAttribute("type", "text/css");
-            style.setAttribute("data-gs-id", id);
+        create_stylesheet: function(id) {
+            var style = document.createElement('style');
+            style.setAttribute('type', 'text/css');
+            style.setAttribute('data-gs-id', id);
             if (style.styleSheet) {
-                style.styleSheet.cssText = "";
+                style.styleSheet.cssText = '';
             }
             else {
-                style.appendChild(document.createTextNode(""));
+                style.appendChild(document.createTextNode(''));
             }
             document.getElementsByTagName('head')[0].appendChild(style);
             return style.sheet;
         },
 
-        insert_css_rule: function (sheet, selector, rules, index) {
-            if(typeof sheet.insertRule === 'function') {
-                sheet.insertRule(selector + "{" + rules + "}", index);
+        insert_css_rule: function(sheet, selector, rules, index) {
+            if (typeof sheet.insertRule === 'function') {
+                sheet.insertRule(selector + '{' + rules + '}', index);
             }
-            else if(typeof sheet.addRule === 'function') {
+            else if (typeof sheet.addRule === 'function') {
                 sheet.addRule(selector, rules, index);
             }
         },
 
-        toBool: function (v) {
+        toBool: function(v) {
             if (typeof v == 'boolean')
                 return v;
             if (typeof v == 'string') {
@@ -61,24 +62,24 @@
 
     var id_seq = 0;
 
-    var GridStackEngine = function (width, onchange, float, height, items) {
+    var GridStackEngine = function(width, onchange, float, height, items) {
         this.width = width;
         this.float = float || false;
         this.height = height || 0;
 
         this.nodes = items || [];
-        this.onchange = onchange || function () {};
+        this.onchange = onchange || function() {};
 
         this._update_counter = 0;
         this._float = this.float;
     };
 
-    GridStackEngine.prototype.batch_update = function () {
+    GridStackEngine.prototype.batch_update = function() {
         this._update_counter = 1;
         this.float = true;
     };
 
-    GridStackEngine.prototype.commit = function () {
+    GridStackEngine.prototype.commit = function() {
         this._update_counter = 0;
         if (this._update_counter == 0) {
             this.float = this._float;
@@ -87,16 +88,16 @@
         }
     };
 
-    GridStackEngine.prototype._fix_collisions = function (node) {
+    GridStackEngine.prototype._fix_collisions = function(node) {
         this._sort_nodes(-1);
 
-        var nn = node, has_locked = Boolean(_.find(this.nodes, function (n) { return n.locked }));
+        var nn = node, has_locked = Boolean(_.find(this.nodes, function(n) { return n.locked }));
         if (!this.float && !has_locked) {
             nn = {x: 0, y: node.y, width: this.width, height: node.height};
         }
 
         while (true) {
-            var collision_node = _.find(this.nodes, function (n) {
+            var collision_node = _.find(this.nodes, function(n) {
                 return n != node && Utils.is_intercepted(n, nn);
             }, this);
             if (typeof collision_node == 'undefined') {
@@ -107,31 +108,32 @@
         }
     };
 
-    GridStackEngine.prototype.is_area_empty = function (x, y, width, height) {
+    GridStackEngine.prototype.is_area_empty = function(x, y, width, height) {
         var nn = {x: x || 0, y: y || 0, width: width || 1, height: height || 1};
-        var collision_node = _.find(this.nodes, function (n) {
+        var collision_node = _.find(this.nodes, function(n) {
             return Utils.is_intercepted(n, nn);
         }, this);
         return collision_node == null;
     };
 
-    GridStackEngine.prototype._sort_nodes = function (dir) {
+    GridStackEngine.prototype._sort_nodes = function(dir) {
         this.nodes = Utils.sort(this.nodes, dir, this.width);
     };
 
-    GridStackEngine.prototype._pack_nodes = function () {
+    GridStackEngine.prototype._pack_nodes = function() {
         this._sort_nodes();
 
         if (this.float) {
-            _.each(this.nodes, function (n, i) {
+            _.each(this.nodes, function(n, i) {
                 if (n._updating || typeof n._orig_y == 'undefined' || n.y == n._orig_y)
                     return;
 
                 var new_y = n.y;
                 while (new_y >= n._orig_y) {
                     var collision_node = _.chain(this.nodes)
-                        .find(function (bn) {
-                            return n != bn && Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
+                        .find(function(bn) {
+                            return n != bn &&
+                                Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
                         })
                         .value();
 
@@ -144,7 +146,7 @@
             }, this);
         }
         else {
-            _.each(this.nodes, function (n, i) {
+            _.each(this.nodes, function(n, i) {
                 if (n.locked)
                     return;
                 while (n.y > 0) {
@@ -154,7 +156,7 @@
                     if (i > 0) {
                         var collision_node = _.chain(this.nodes)
                             .take(i)
-                            .find(function (bn) {
+                            .find(function(bn) {
                                 return Utils.is_intercepted({x: n.x, y: new_y, width: n.width, height: n.height}, bn);
                             })
                             .value();
@@ -171,7 +173,7 @@
         }
     };
 
-    GridStackEngine.prototype._prepare_node = function (node, resizing) {
+    GridStackEngine.prototype._prepare_node = function(node, resizing) {
         node = _.defaults(node || {}, {width: 1, height: 1, x: 0, y: 0 });
 
         node.x = parseInt('' + node.x);
@@ -213,7 +215,7 @@
         return node;
     };
 
-    GridStackEngine.prototype._notify = function () {
+    GridStackEngine.prototype._notify = function() {
         if (this._update_counter) {
             return;
         }
@@ -222,12 +224,12 @@
         this.onchange(deleted_nodes);
     };
 
-    GridStackEngine.prototype.clean_nodes = function () {
-        _.each(this.nodes, function (n) {n._dirty = false });
+    GridStackEngine.prototype.clean_nodes = function() {
+        _.each(this.nodes, function(n) {n._dirty = false });
     };
 
-    GridStackEngine.prototype.get_dirty_nodes = function () {
-        return _.filter(this.nodes, function (n) { return n._dirty; });
+    GridStackEngine.prototype.get_dirty_nodes = function() {
+        return _.filter(this.nodes, function(n) { return n._dirty; });
     };
 
     GridStackEngine.prototype.add_node = function(node) {
@@ -244,12 +246,12 @@
         if (node.auto_position) {
             this._sort_nodes();
 
-            for (var i = 0; ; ++i) {
+            for (var i = 0;; ++i) {
                 var x = i % this.width, y = Math.floor(i / this.width);
                 if (x + node.width > this.width) {
                     continue;
                 }
-                if (!_.find(this.nodes, function (n) {
+                if (!_.find(this.nodes, function(n) {
                     return Utils.is_intercepted({x: x, y: y, width: node.width, height: node.height}, n);
                 })) {
                     node.x = x;
@@ -267,15 +269,15 @@
         return node;
     };
 
-    GridStackEngine.prototype.remove_node = function (node) {
+    GridStackEngine.prototype.remove_node = function(node) {
         node._id = null;
         this.nodes = _.without(this.nodes, node);
         this._pack_nodes();
         this._notify(node);
     };
 
-    GridStackEngine.prototype.can_move_node = function (node, x, y, width, height) {
-        var has_locked = Boolean(_.find(this.nodes, function (n) { return n.locked }));
+    GridStackEngine.prototype.can_move_node = function(node, x, y, width, height) {
+        var has_locked = Boolean(_.find(this.nodes, function(n) { return n.locked }));
 
         if (!this.height && !has_locked)
             return true;
@@ -286,21 +288,29 @@
             null,
             this.float,
             0,
-            _.map(this.nodes, function (n) { if (n == node) { cloned_node = $.extend({}, n); return cloned_node; } return $.extend({}, n) }));
+            _.map(this.nodes, function(n) {
+                if (n == node) {
+                    cloned_node = $.extend({}, n);
+                    return cloned_node;
+                }
+                return $.extend({}, n);
+            }));
 
         clone.move_node(cloned_node, x, y, width, height);
 
         var res = true;
 
         if (has_locked)
-            res &= !Boolean(_.find(clone.nodes, function (n) { return n != cloned_node && Boolean(n.locked) && Boolean(n._dirty); }));
+            res &= !Boolean(_.find(clone.nodes, function(n) {
+                return n != cloned_node && Boolean(n.locked) && Boolean(n._dirty);
+            }));
         if (this.height)
             res &= clone.get_grid_height() <= this.height;
 
         return res;
     };
 
-    GridStackEngine.prototype.can_be_placed_with_respect_to_height = function (node) {
+    GridStackEngine.prototype.can_be_placed_with_respect_to_height = function(node) {
         if (!this.height)
             return true;
 
@@ -309,12 +319,12 @@
             null,
             this.float,
             0,
-            _.map(this.nodes, function (n) { return $.extend({}, n) }));
+            _.map(this.nodes, function(n) { return $.extend({}, n) }));
         clone.add_node(node);
         return clone.get_grid_height() <= this.height;
     };
 
-    GridStackEngine.prototype.move_node = function (node, x, y, width, height, no_pack) {
+    GridStackEngine.prototype.move_node = function(node, x, y, width, height, no_pack) {
         if (typeof x != 'number') x = node.x;
         if (typeof y != 'number') y = node.y;
         if (typeof width != 'number') width = node.width;
@@ -347,28 +357,28 @@
         return node;
     };
 
-    GridStackEngine.prototype.get_grid_height = function () {
-        return _.reduce(this.nodes, function (memo, n) { return Math.max(memo, n.y + n.height); }, 0);
+    GridStackEngine.prototype.get_grid_height = function() {
+        return _.reduce(this.nodes, function(memo, n) { return Math.max(memo, n.y + n.height); }, 0);
     };
 
-    GridStackEngine.prototype.begin_update = function (node) {
-        _.each(this.nodes, function (n) {
+    GridStackEngine.prototype.begin_update = function(node) {
+        _.each(this.nodes, function(n) {
             n._orig_y = n.y;
         });
         node._updating = true;
     };
 
-    GridStackEngine.prototype.end_update = function () {
-        _.each(this.nodes, function (n) {
+    GridStackEngine.prototype.end_update = function() {
+        _.each(this.nodes, function(n) {
             n._orig_y = n.y;
         });
-        var n = _.find(this.nodes, function (n) { return n._updating; });
+        var n = _.find(this.nodes, function(n) { return n._updating; });
         if (n) {
             n._updating = false;
         }
     };
 
-    var GridStack = function (el, opts) {
+    var GridStack = function(el, opts) {
         var self = this, one_column_mode;
 
         this.container = $(el);
@@ -409,9 +419,9 @@
 
         this._init_styles();
 
-        this.grid = new GridStackEngine(this.opts.width, function (nodes) {
+        this.grid = new GridStackEngine(this.opts.width, function(nodes) {
             var max_height = 0;
-            _.each(nodes, function (n) {
+            _.each(nodes, function(n) {
                 if (n._id == null) {
                     n.el.remove();
                 }
@@ -430,24 +440,29 @@
         if (this.opts.auto) {
             var elements = [];
             var _this = this;
-            this.container.children('.' + this.opts.item_class).each(function (index, el) {
+            this.container.children('.' + this.opts.item_class).each(function(index, el) {
                 el = $(el);
                 elements.push({
                     el: el,
-                    i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * _this.opts.width // Use opts.width as weight for Y
+                    i: parseInt(el.attr('data-gs-x')) + parseInt(el.attr('data-gs-y')) * _this.opts.width
                 });
             });
-            _.chain(elements).sortBy(function (x) { return x.i; }).each(function (i) {
+            _.chain(elements).sortBy(function(x) { return x.i; }).each(function(i) {
                 self._prepare_element(i.el);
             }).value();
         }
 
         this.set_animation(this.opts.animate);
 
-        this.placeholder = $('<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '"><div class="placeholder-content" /></div>').hide();
-        this.container.height((this.grid.get_grid_height()) * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
+        this.placeholder = $(
+            '<div class="' + this.opts.placeholder_class + ' ' + this.opts.item_class + '">' +
+            '<div class="placeholder-content" /></div>').hide();
 
-        var on_resize_handler = function () {
+        this.container.height(
+            this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) -
+            this.opts.vertical_margin);
+
+        var on_resize_handler = function() {
             if (self._is_one_column_mode()) {
                 if (one_column_mode)
                     return;
@@ -455,7 +470,7 @@
                 one_column_mode = true;
 
                 self.grid._sort_nodes();
-                _.each(self.grid.nodes, function (node) {
+                _.each(self.grid.nodes, function(node) {
                     self.container.append(node.el);
 
                     if (!node.no_move) {
@@ -472,7 +487,7 @@
 
                 one_column_mode = false;
 
-                _.each(self.grid.nodes, function (node) {
+                _.each(self.grid.nodes, function(node) {
                     if (!node.no_move) {
                         node.el.draggable('enable');
                     }
@@ -487,7 +502,7 @@
         on_resize_handler();
     };
 
-    GridStack.prototype._init_styles = function () {
+    GridStack.prototype._init_styles = function() {
         if (this._styles_id) {
             $('[data-gs-id="' + this._styles_id + '"]').remove();
         }
@@ -497,7 +512,7 @@
             this._styles._max = 0;
     };
 
-    GridStack.prototype._update_styles = function (max_height) {
+    GridStack.prototype._update_styles = function(max_height) {
         if (this._styles == null) {
             return;
         }
@@ -541,18 +556,21 @@
         }
     };
 
-    GridStack.prototype._update_container_height = function () {
+    GridStack.prototype._update_container_height = function() {
         if (this.grid._update_counter) {
             return;
         }
-        this.container.height(this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) - this.opts.vertical_margin);
+        this.container.height(
+            this.grid.get_grid_height() * (this.opts.cell_height + this.opts.vertical_margin) -
+            this.opts.vertical_margin);
     };
 
-    GridStack.prototype._is_one_column_mode = function () {
-        return (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) <= this.opts.min_width;
+    GridStack.prototype._is_one_column_mode = function() {
+        return (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) <=
+            this.opts.min_width;
     };
 
-    GridStack.prototype._prepare_element = function (el) {
+    GridStack.prototype._prepare_element = function(el) {
         var self = this;
         el = $(el);
 
@@ -577,7 +595,7 @@
 
         var cell_width, cell_height;
 
-        var on_start_moving = function (event, ui) {
+        var on_start_moving = function(event, ui) {
             self.container.append(self.placeholder);
             var o = $(this);
             self.grid.clean_nodes();
@@ -596,7 +614,7 @@
             el.resizable('option', 'minHeight', self.opts.cell_height * (node.min_height || 1));
         };
 
-        var on_end_moving = function (event, ui) {
+        var on_end_moving = function(event, ui) {
             self.placeholder.detach();
             var o = $(this);
             node.el = o;
@@ -618,9 +636,9 @@
         el.draggable(_.extend(this.opts.draggable, {
             start: on_start_moving,
             stop: on_end_moving,
-            drag: function (event, ui) {
+            drag: function(event, ui) {
                 var x = Math.round(ui.position.left / cell_width),
-                    y = Math.floor((ui.position.top + cell_height/2) / cell_height);
+                    y = Math.floor((ui.position.top + cell_height / 2) / cell_height);
                 if (!self.grid.can_move_node(node, x, y, node.width, node.height)) {
                     return;
                 }
@@ -631,9 +649,9 @@
         })).resizable(_.extend(this.opts.resizable, {
             start: on_start_moving,
             stop: on_end_moving,
-            resize: function (event, ui) {
+            resize: function(event, ui) {
                 var x = Math.round(ui.position.left / cell_width),
-                    y = Math.floor((ui.position.top + cell_height/2) / cell_height),
+                    y = Math.floor((ui.position.top + cell_height / 2) / cell_height),
                     width = Math.round(ui.size.width / cell_width),
                     height = Math.round(ui.size.height / cell_height);
                 if (!self.grid.can_move_node(node, x, y, width, height)) {
@@ -655,7 +673,7 @@
         el.attr('data-gs-locked', node.locked ? 'yes' : null);
     };
 
-    GridStack.prototype.set_animation = function (enable) {
+    GridStack.prototype.set_animation = function(enable) {
         if (enable) {
             this.container.addClass('grid-stack-animate');
         }
@@ -664,7 +682,7 @@
         }
     };
 
-    GridStack.prototype.add_widget = function (el, x, y, width, height, auto_position) {
+    GridStack.prototype.add_widget = function(el, x, y, width, height, auto_position) {
         el = $(el);
         if (typeof x != 'undefined') el.attr('data-gs-x', x);
         if (typeof y != 'undefined') el.attr('data-gs-y', y);
@@ -678,12 +696,12 @@
         return el;
     };
 
-    GridStack.prototype.will_it_fit = function (x, y, width, height, auto_position) {
+    GridStack.prototype.will_it_fit = function(x, y, width, height, auto_position) {
         var node = {x: x, y: y, width: width, height: height, auto_position: auto_position};
         return this.grid.can_be_placed_with_respect_to_height(node);
     };
 
-    GridStack.prototype.remove_widget = function (el, detach_node) {
+    GridStack.prototype.remove_widget = function(el, detach_node) {
         detach_node = typeof detach_node === 'undefined' ? true : detach_node;
         el = $(el);
         var node = el.data('_gridstack_node');
@@ -694,17 +712,17 @@
             el.remove();
     };
 
-    GridStack.prototype.remove_all = function (detach_node) {
-        _.each(this.grid.nodes, function (node) {
+    GridStack.prototype.remove_all = function(detach_node) {
+        _.each(this.grid.nodes, function(node) {
             this.remove_widget(node.el, detach_node);
         }, this);
         this.grid.nodes = [];
         this._update_container_height();
     };
 
-    GridStack.prototype.resizable = function (el, val) {
+    GridStack.prototype.resizable = function(el, val) {
         el = $(el);
-        el.each(function (index, el) {
+        el.each(function(index, el) {
             el = $(el);
             var node = el.data('_gridstack_node');
             if (typeof node == 'undefined' || node == null) {
@@ -722,9 +740,9 @@
         return this;
     };
 
-    GridStack.prototype.movable = function (el, val) {
+    GridStack.prototype.movable = function(el, val) {
         el = $(el);
-        el.each(function (index, el) {
+        el.each(function(index, el) {
             el = $(el);
             var node = el.data('_gridstack_node');
             if (typeof node == 'undefined' || node == null) {
@@ -742,19 +760,19 @@
         return this;
     };
 
-    GridStack.prototype.disable = function () {
+    GridStack.prototype.disable = function() {
         this.movable(this.container.children('.' + this.opts.item_class), false);
         this.resizable(this.container.children('.' + this.opts.item_class), false);
     };
 
-    GridStack.prototype.enable = function () {
+    GridStack.prototype.enable = function() {
         this.movable(this.container.children('.' + this.opts.item_class), true);
         this.resizable(this.container.children('.' + this.opts.item_class), true);
     };
 
-    GridStack.prototype.locked = function (el, val) {
+    GridStack.prototype.locked = function(el, val) {
         el = $(el);
-        el.each(function (index, el) {
+        el.each(function(index, el) {
             el = $(el);
             var node = el.data('_gridstack_node');
             if (typeof node == 'undefined' || node == null) {
@@ -767,7 +785,7 @@
         return this;
     };
 
-    GridStack.prototype._update_element = function (el, callback) {
+    GridStack.prototype._update_element = function(el, callback) {
         el = $(el).first();
         var node = el.data('_gridstack_node');
         if (typeof node == 'undefined' || node == null) {
@@ -789,8 +807,8 @@
         self.grid.end_update();
     };
 
-    GridStack.prototype.resize = function (el, width, height) {
-        this._update_element(el, function (el, node) {
+    GridStack.prototype.resize = function(el, width, height) {
+        this._update_element(el, function(el, node) {
             width = (width != null && typeof width != 'undefined') ? width : node.width;
             height = (height != null && typeof height != 'undefined') ? height : node.height;
 
@@ -798,8 +816,8 @@
         });
     };
 
-    GridStack.prototype.move = function (el, x, y) {
-        this._update_element(el, function (el, node) {
+    GridStack.prototype.move = function(el, x, y) {
+        this._update_element(el, function(el, node) {
             x = (x != null && typeof x != 'undefined') ? x : node.x;
             y = (y != null && typeof y != 'undefined') ? y : node.y;
 
@@ -807,8 +825,8 @@
         });
     };
 
-    GridStack.prototype.update = function (el, x, y, width, height) {
-        this._update_element(el, function (el, node) {
+    GridStack.prototype.update = function(el, x, y, width, height) {
+        this._update_element(el, function(el, node) {
             x = (x != null && typeof x != 'undefined') ? x : node.x;
             y = (y != null && typeof y != 'undefined') ? y : node.y;
             width = (width != null && typeof width != 'undefined') ? width : node.width;
@@ -818,7 +836,7 @@
         });
     };
 
-    GridStack.prototype.cell_height = function (val) {
+    GridStack.prototype.cell_height = function(val) {
         if (typeof val == 'undefined') {
             return this.opts.cell_height;
         }
@@ -829,7 +847,7 @@
         this._update_styles();
     };
 
-    GridStack.prototype.cell_width = function () {
+    GridStack.prototype.cell_width = function() {
         var o = this.container.children('.' + this.opts.item_class).first();
         return Math.ceil(o.outerWidth() / o.attr('data-gs-width'));
     };
@@ -845,16 +863,16 @@
         return {x: Math.floor(relativeLeft / column_width), y: Math.floor(relativeTop / row_height)};
     };
 
-    GridStack.prototype.batch_update = function () {
+    GridStack.prototype.batch_update = function() {
         this.grid.batch_update();
     };
 
-    GridStack.prototype.commit = function () {
+    GridStack.prototype.commit = function() {
         this.grid.commit();
-        this._update_container_height()
+        this._update_container_height();
     };
 
-    GridStack.prototype.is_area_empty = function (x, y, width, height) {
+    GridStack.prototype.is_area_empty = function(x, y, width, height) {
         return this.grid.is_area_empty(x, y, width, height);
     };
 
@@ -862,8 +880,8 @@
 
     scope.GridStackUI.Utils = Utils;
 
-    $.fn.gridstack = function (opts) {
-        return this.each(function () {
+    $.fn.gridstack = function(opts) {
+        return this.each(function() {
             if (!$(this).data('gridstack')) {
                 $(this).data('gridstack', new GridStack(this, opts));
             }