UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.95 Safari/537.36

Steps to reproduce the problem:
1. Download any MacOS .app file
2. Add a "drop" listener on an element you will drag this file to
3. Drop the file onto the element
4. The event.DataTransfer.items will recognise the package as directory 

What is the expected behavior?
I have tested it against Safari - safari treats the drag and drop event the same way as adding the file to the file upload element. When the upload starts it actually generates .app.zip file same way chrome does when the file is added through the file input.

What went wrong?
When the drop event is handled the .app file is recognised as a directory (I cannot say whether its the same case with the adding the file through file input) I'd assume that the expected behaviour would be the same the "directory" would get compressed to zip or there should be a method to actually trigger the same behaviour as per adding the .app file through file input. 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 55.0.2883.95  Channel: stable
OS Version: OS X 10.12.1
Flash Version: 

This may not be a bug but expected behaviour but I think there should be at least an api allowing manually trigger the same behaviour as per file input that automatically compresses the file to ZIP (safari does it automatically though)