[Webkit-unassigned] [Bug 243539] New: getComputedStyle(elt, pseudoElt) accepting all pseudo-elements with fewer than 2 preceding colons

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243539

            Bug ID: 243539
           Summary: getComputedStyle(elt,pseudoElt) accepting all
                    pseudo-elements with fewer than 2 preceding colons
           Product: WebKit
           Version: Safari 15
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zlip.792 at gmail.com

Hi Team,

Another test case from Chrome Bugs, where all browsers are different and I just wanted to share the latest share of Safari 15.6 on macOS 12.5:

Test Case - https://jsfiddle.net/rdb1jz8n/show

Chrome Bug - https://bugs.chromium.org/p/chromium/issues/detail?id=1197620

*** STEPS TO REPRODUCE ***

1) Run Test Case
2) Go to Console [Safari Developer Tools] and Run following:

getComputedStyle(document.getElementById("a"), "selection").color
getComputedStyle(document.getElementById("a"), ":selection").color

<> EXPECTED RESULTS:

"rgb(0, 0, 0)"
"rgb(0, 0, 0)"

<> ACTUAL RESULTS:

"rgb(255, 0, 0)"
"rgb(255, 0, 0)"

_________

All other browsers output:

Firefox Nightly 105 -> "rgb(0, 0, 0)" & "" (for first and second case respectively)
Chrome Canary 105 -> "rgb(255, 0, 0)" for both and matching Safari right now

______

Appreciate if we can align with web-spec and fix this across all browsers. If it is duplicate then please mark and if it is fixed upstream then please also mark duplicate in reference to other.

Thanks!

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