#import 
#import 
// https://html.spec.whatwg.org/multipage/dnd.html#datatransfer
[Exposed=Window]
interface DataTransfer {
    constructor();
    attribute DOMString dropEffect;
    attribute DOMString effectAllowed;
    [SameObject] readonly attribute DataTransferItemList items;
    [FIXME] undefined setDragImage(Element image, long x, long y);
    // old interface
    readonly attribute sequence types; // FIXME: This should be FrozenArray
    DOMString getData(DOMString format);
    [FIXME] undefined setData(DOMString format, DOMString data);
    [FIXME] undefined clearData(optional DOMString format);
    [SameObject] readonly attribute FileList files;
};