Bug 204487 – Safari Gives False Positives for draggable property

• Component: DOM
• Status: NEW

[[e-mail]]

Safari returns true for `draggable` DOM property. 

```
isDraggableSupported = (()=> {
   const div = document.createElement("div");
div.setAttribute("draggable", "true");
return div.draggable === true;
})();
```

Result: true.
Expected result: false

According to the HTML5 specification, "The draggable property returns true if the element is draggable; otherwise, it returns false." https://html.spec.whatwg.org/dev/dnd.html#the-draggable-attribute 

In Safari iOS elements are not draggable, so the draggable property must always be false.

See also https://bugs.webkit.org/show_bug.cgi?id=204271

[Radar WebKit Bug Importer]

<rdar://problem/57436196>