Indicates that the element accept the dropping of content on it.

HTML5.
Unimplemented.
This enumerated attribute indicates what types of content can be dropped on an element, using the Drag and Drop API. It can have the following values:

copy, which indicates that dropping will create a copy of the element that was dragged
move, which indicates that the element that was dragged will be moved to this new location.
link, will create a link to the dragged data.
