NEW 266742
Web Inspector does not display author styles for some pseudo-elements 
https://bugs.webkit.org/show_bug.cgi?id=266742
Summary Web Inspector does not display author styles for some pseudo-elements
Aditya Keerthi
Reported 2023-12-20 16:38:59 PST
`::track` and `::thumb` (which are disabled by default, but can be turned on with the ThumbAndTrackPseudoElementsEnabled pref) author styles don't show up. `::file-selector-button`, which has shipped for a while, is also likely impacted. I think we need to add them all here: https://github.com/WebKit/WebKit/blob/c213889156180d79d3d01c5108e2152c2b318c40/Source/WebInspectorUI/UserInterface/Controllers/CSSManager.js#L254
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Aditya Keerthi
Comment 1 2023-12-20 20:45:43 PST
I think this is a more general issue with anything that uses `PseudoElementWebKitCustom`. Currently, the protocol serializes PseudoId -> string as a one-to-one. However, `PseudoElementWebKitCustom` is one PseudoId that can correspond to different strings. We might need to make some infrastructural additions to support this.
Radar WebKit Bug Importer
Comment 2 2023-12-27 16:39:11 PST
<rdar://problem/120222388>
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