Very good component. To make the component much better you should make a new version and define the drop-area in dynamic way.

It works really well, however there are some things on the code that could be improved. The JavaScript on the OnReady function defines the ID of the hidden input associated to the droppable file area in a non-dynamic way meaning that if there are several droppable file areas on a single page they will all share the same id. This is dangerous since the code relies on the id to provide some actions and with repeated ids this means that the code can malfunction. Also on the same JavaScript there is the usage of the action Document.querySelector() to look for an element on the page via the class but similar to the id part it's non-dynamic meaning that if there are several file upload areas on the same screen it will malfunction.