Thanks. The update() function call does help, and it seems that I need to do the Draggable create after I have added the starting content. But there is still a problem that is caused by a weakness in Cordova. It appears that Cordova is linked to the older (pre ios 8) UIWebView, not the new WKWebView. So, even using Draggable with Cordova I get the pre iOS 8 behavior of no Javascript updates and no screen painting while the view UIWebKit is scrolling. With this limitation in Cordova, I will not be able to add and remove content dynamically unless I wait till scrolling stops at the end of the viewport.
The following link describes the problem with Cordova at the end of the writeup. Thanks for your help.
http://developer.telerik.com/featured/scroll-event-change-ios-8-big-deal/
