[Webkit-unassigned] [Bug 283851] New: Detect floats to avoid or clear due to negative margin top

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=283851

            Bug ID: 283851
           Summary: Detect floats to avoid or clear due to negative margin
                    top
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: BrowserCompat
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ahmad.saleem792 at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Hi Team,

While looking into Blink's test cases failing in Safari, I stumbled upon this:

Test Case (1) - [avoid-floats-when-negative-margin-top-6.html]: https://jsfiddle.net/acvgtwLp/

^ Safari Technology Preview 208 fails while Chrome Canary 134 and Firefox Nightly 135 passes.

Test Case (2) - [avoid-floats-when-negative-margin-top-5.html]: https://jsfiddle.net/w148qzmn/

^ Safari Technology Preview 208 fails while Chrome Canary 134 and Firefox Nightly 135 passes.

Test Case (3) - [avoid-floats-when-negative-margin-top-4.html]: https://jsfiddle.net/6hx8Lsqn/

^ Safari Technology Preview 208 fails while Chrome Canary 134 and Firefox Nightly 135 passes.

Test Case (4) - [avoid-floats-when-negative-margin-top-3.html]: https://jsfiddle.net/y24qgd1v/

^ Safari Technology Preview 208 fails while Chrome Canary 134 and Firefox Nightly 135 passes.

Test Case (5) - [avoid-floats-when-negative-margin-top-2.html]: https://jsfiddle.net/ovxckf39/

^ Safari Technology Preview 208 fails while Chrome Canary 134 and Firefox Nightly 135 passes.

Test Case (6) - [avoid-floats-when-negative-margin-top.html]: https://jsfiddle.net/e8fm79cq/

^ Safari Technology Preview 208 fails while Chrome Canary 134 and Firefox Nightly 135 passes.

__

Blink Commit: https://source.chromium.org/chromium/chromium/src/+/5c6452a360ed086b96680a2cad532e2be7d68385

This might be pre-requisite to bug 283760.

Just raising so we can track and fix it.

Thanks!

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