Bug 262878 – uievents/mouse/mousemove_prevent_default_action.tentative.html WPT is failing

• Status: RESOLVED
• Resolution: FIXED
• Component: UI Events

[Abrar Rahman Protyasha]

WPT status here: https://wpt.fyi/results/uievents/mouse/mousemove_prevent_default_action.tentative.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2023-events

It was added as an WPT due to the discussion in: https://github.com/w3c/uievents/issues/278

Discussed in chromium here: https://bugs.chromium.org/p/chromium/issues/detail?id=346473

There's an active test change proposal here: https://github.com/web-platform-tests/interop/issues/396

[Radar WebKit Bug Importer]

<rdar://problem/116668701>

[Abrar Rahman Protyasha]

There is a web compat risk associated with changing WebKit's behavior to what this test expects. Refer to https://github.com/w3c/uievents/issues/278 for extended discussion.

Having said that, it is well understood that calling `preventDefault` on `mousemove` events should _NOT_ prevent `selectionchange`.

[Abrar Rahman Protyasha]

Pull request: https://github.com/WebKit/WebKit/pull/18890

[EWS]

Committed 269370@main (4ed18444c723): <https://commits.webkit.org/269370@main>

Reviewed commits have been landed. Closing PR #18890 and removing active labels.