Simple drag and drop:
dragenter
    types: Files
dragover
    types: Files
drop
    types: Files
    files: 1
        test1

Drag enter and leave:
dragenter
    types: Files
dragover
    types: Files
dragleave
    types: Files
dragenter
    types: Files
dragover
    types: Files
drop
    types: Files
    files: 1
        test2

Drag enter not accepted:
dragenter
    types: Files

Drag over not accepted:
dragenter
    types: Files
dragover
    types: Files
dragover
    types: Files
dragleave
    types: Files

Drop not accepted:
dragenter
    types: Files
dragover
    types: Files
drop
    types: Files
    files: 1
        test5