The files
property of DataTransfer
objects is a list of the files
in the drag operation. If the operation includes no files, the list is empty.
This feature can be used to drag files from a user's desktop to the browser.
Note: The files
property of DataTransfer
objects can only be accessed from within the drop
event. For all other events, the files
property will be empty — because its underlying data store will be in a protected mode.