Follow up from https://bugs.webkit.org/show_bug.cgi?id=184250: initially, the dynamically added event listeners would always be treated as passive. The patch fixes this behaviour, but the first 1 or 2 events still won't be cancellable (unless you touch the DOM). Fixing this should allow for removing the workaround in the previous bug's regression test.
<rdar://problem/40270698>
When is this likely to be fixed?
Any idea when this is likely to be fixed? This is quite a serious issue that makes any drag and drop functionality on a reasonably complex website to be very broken. It makes both website owners, library owners, and safari look bad. Almost everyone affected by https://bugs.webkit.org/show_bug.cgi?id=184250 is still having problems because of this bug. If 184250 was P2 Critical then this should be as well.
Mass move bugs into the DOM component.