DropTarget is a generic drop target which acts as an invisible frame around another UI element.
The DropTarget is visualized by a dotted line around the container inside this UI element, as shown in the picture below:
● onDrop (String data, String mimeType, String tags)
This event is triggered when the user drops an object onto this drop target.
○ data: The text representation of the drag source’s data.
○ mimeType: The mime type specified for the drag source.
○ tags: The set of tags corresponding to the data which has been dropped here, as defined by the drag source.