The jQuery library interacts with web applications through features of the dom they share. Support for drag and drop in the UI is signaled by attaching the class 'sortable' to the div that contain elements to be moved.
Examples offer insight into sortable's workings and versatility.
The documentation presents a series of examples illustrating the configurability of the feature. jquery 
The sortable mechanism has a large api that includes twentyfive configuration options to a dozen calls and a dozen more events. jquery
With such a wide interface there is much left to the ingenuity of the developer to attach meaning to motion. Since the dawn of the graphical user-interface attaching meaning to direct-manipulation has challenged designers and users alike.