mikeplate/jquery-drag-drop-plugin — pull request #5 by icoloma (2011-12-27 15:58:46+00:00)
Title: Add attribute to limit dragging within a container

This attribute limits the movement within a DOM element. Included test case (try to drag letters M-R to the right/left extremes of the page).

On an unrelated note, the vertical position of the page seems to be wrong. If the page has a non-zero scroll position (i.e: set a really tall chrome console and scroll the page contents down) the drop behavior gets broken.