Making Drag And Drop Upload With Less Javascript

I'm trying to make an upload holder for my website, so users can easily drag and drop a file on it. there is a lot of libraries and events for doing that, but I need a simple way.

Solution 1:

Put the form on a hidden iframe. Use an ordinary div for the target. When the file is dropped, catch the event and update the input, then submit as post. The result is ajax-like uploading via file drag and drop.