[1] Make DataTransfer's types attribute use a FrozenArray (domenic著, ) <https://github.com/whatwg/html/commit/466379ade56b8ba18584057085443844f4df5669>
[2] Add a constructor for DataTransfer (garykac著, ) <https://github.com/whatwg/html/commit/688a102b52c7050a6808a05c5d8fe149c0937fd7>
[3] 25638 – Let DataTransfer.setData() accept data in forms other than DOMString, e.g. Blob, elements, structured-cloneable data, etc () <https://www.w3.org/Bugs/Public/show_bug.cgi?id=25638>
[4] Specify what getAsString and getAsFile does when DataTransferItem is in the disabled mode · Issue #2927 · whatwg/html () <https://github.com/whatwg/html/issues/2927>