I\'ve got a draggable thing outside an iframe, and a droppable target inside it. Here I\'ve shown the iframe as containing a snippet of the HTML that is loaded by its src at
It was asked a long ago, but digging SO I found a GIST where people solved this problem by overwriting the default behavior of $.ui.ddmanager.prepareOffsets.
You can find the working code here:
https://gist.github.com/gujiman/581a3cee1dbf4beafccb