Bug 267815

Summary:	PointerEvent delivered to a pseudo inside a display:contents element yields unexpected results
Product:	WebKit	Reporter:	Nige White <nige.animal>
Component:	UI Events	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	a_protyasha, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 17
Hardware:	Unspecified
OS:	Unspecified

Description Nige White 2024-01-20 07:27:55 PST

Chromium has the same issue here: https://bugs.chromium.org/p/chromium/issues/detail?id=1518093

It would seem that Chromium inherited the issue from WebKit.

Run this and follow instructions: https://codepen.io/Animal-Nige/pen/qBvqxjz

Have the debugger console open.

Click in the center of the red box (#inner).

The event is delivered to #inner which is the first element at the mouse position to have a box in which to report offsetX/offsetY

But it reports offsetX/offsetY as pageX/pageY.

There's plenty of discussion on the Chromium thread. But I think this is a hole in the spec where rational behaviour needs to be decided and codified.

Comment 1 Nige White 2024-01-25 23:18:24 PST

No?

Comment 2 Radar WebKit Bug Importer 2024-01-27 07:28:11 PST

<rdar://problem/121737485>