[Webkit-unassigned] [Bug 273031] New: Scrollable elements with `pointer-events: none` prevent scroll events to pass through underlying scrollable sibling elements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=273031

            Bug ID: 273031
           Summary: Scrollable elements with `pointer-events: none`
                    prevent scroll events to pass through underlying
                    scrollable sibling elements
           Product: WebKit
           Version: Safari 17
          Hardware: Mac (Apple Silicon)
                OS: macOS 14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hernan at pagy.co
                CC: simon.fraser at apple.com

If I have a scrollable element A with `pointer-events: none` overlaid on top of another scrollable sibling element B with `pointer-events: auto`, I’d expect scrolling with the pointer over B would scroll element A but it does not.

Tested in Safari 17.4.1 (macOS 14.4.1) and Safari Technology Preview Release 192.

It does work as expected in Chrome and Firefox. Also in Safari 17.1 on macOS Ventura.

Here’s an example reproducing it: https://codesandbox.io/p/devbox/safari-bug-kyzvjt

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