dataTransfer.getData("text/uri-list") for image on page returns nothing

[Zarema]

On one page there is a block and an image (an `img` element). On the block there is an `ondrop` event handler. 

```
function drop(dropevent) {
    dropevent.preventDefault();
    var data = dropevent.dataTransfer.getData("text/uri-list");
    dropevent.target.innerText = data
}
```

In Safari 10.1, if you drag an image into this block, the `dataTransfer.getData("text/uri-list")` method returns nothing. In other browsers and previous version of Safari, this method returns the url of the image.

Demo on codepen: https://codepen.io/zmoki/pen/mwjgLG

[Brady Eidson]

We have this internally as <rdar://problem/31347248>

Does this affect any websites that you know of?

[Brady Eidson]

*** This bug has been marked as a duplicate of bug 170637 ***

[Zarema]

Yes, this affects Uploadcare Widget (file picker, https://uploadcare.com/documentation/widget/). You can see it on the pages https://uploadcare.com/ and https://uploadcare.com/quick_start/. On these pages there is demo where you need to drag image onto the button.

[Brady Eidson]

(In reply to Zarema from comment #3)
> Yes, this affects Uploadcare Widget (file picker,
> https://uploadcare.com/documentation/widget/). You can see it on the pages
> https://uploadcare.com/ and https://uploadcare.com/quick_start/. On these
> pages there is demo where you need to drag image onto the button.

I meant deployed sites in practice, but please feel free to keep commenting in the original bug (170637)