size() method has been removed in jQuery 3.0, updated to use .length property

apethedev · web-flow · commit 21d3529bf0d6 · 2017-09-18T15:38:04.000+08:00
https://api.jquery.com/size/
diff --git a/src/scrollable/scrollable.js b/src/scrollable/scrollable.js
@@ -81,7 +81,7 @@
 			}, 
 
 			getSize: function() {
-				return self.getItems().size();	
+				return self.getItems().length;	
 			},
 
 			getNaviButtons: function() {
