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WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.

wpt / css / css-shadow / part

Spec: CSS Shadow ↗

Runs: Chrome 155.0.8041.0 (wpt@2c385f65e, 2026-09-04) | Firefox 157.0a1 (wpt@2c385f65e, 2026-09-04) | Safari 251 preview (wpt@a1e944e7a, 2026-09-04) | Ladybird 1.0-a7825 (wpt@2c385f65e, 2026-09-04) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)

Sort areas: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total99.5%186/18793.6%175/18794.7%177/18778.6%147/18771.1%133/1870.0%0/187
TestChromeFirefoxSafariLadybirdServoBlitz
all-hosts.html2/22/22/22/22/20/2
animation-part.htmlPASSPASSPASSPASSPASSFAIL
both-part-and-exportparts.htmlPASSPASSPASSPASSPASSFAIL
chaining-invalid-selector.html2/22/22/22/22/20/2
complex-matching.htmlPASSPASSPASSPASSPASSFAIL
complex-non-matching.htmlPASSPASSPASSPASSPASSFAIL
different-host.htmlPASSPASSPASSPASSPASSFAIL
double-forward.htmlPASSPASSPASSPASSPASSFAIL
exportparts-different-scope.htmlPASSPASSPASSPASSPASSFAIL
exportparts-layered.htmlFAILFAILFAILPASSFAILFAIL
exportparts-multiple.htmlPASSPASSPASSPASSPASSFAIL
grouping-with-checked.html4/44/44/44/44/40/4
grouping-with-disabled.html4/44/44/44/44/40/4
host-part-001.htmlPASSPASSPASSPASSPASSFAIL
host-part-002.htmlPASSPASSPASSPASSPASSFAIL
host-part-003.htmlPASSPASSPASSPASSPASSFAIL
host-part-nesting.htmlPASSPASSPASSPASSPASSFAIL
host-stylesheet.htmlPASSPASSPASSPASSPASSFAIL
inner-host.html2/22/22/22/22/20/2
interaction-with-nested-pseudo-class.htmlPASSTIMEOUTPASSFAILPASSFAIL
interaction-with-placeholder.htmlPASSPASSPASSPASSPASSFAIL
interaction-with-pseudo-elements.html6/66/66/66/64/60/6
invalidation-change-exportparts-forward.htmlPASSPASSPASSPASSFAILFAIL
invalidation-change-part-name-forward.htmlPASSPASSPASSPASSFAILFAIL
invalidation-change-part-name-idl-domtokenlist.htmlPASSPASSPASSPASSPASSFAIL
invalidation-change-part-name-idl-setter.htmlPASSPASSPASSPASSPASSFAIL
invalidation-change-part-name.htmlPASSPASSPASSPASSFAILFAIL
invalidation-complex-selector-forward.htmlPASSPASSPASSPASSPASSFAIL
invalidation-complex-selector.htmlPASSPASSPASSPASSPASSFAIL
invalidation-part-pseudo.htmlPASSPASSPASSPASSPASSFAIL
multiple-parts.html3/33/33/33/33/30/3
multiple-scopes.html10/109/1010/1010/101/100/10
part-after-combinator-invalidation.htmlPASSPASSPASSPASSPASSFAIL
part-mutation-pseudo.htmlPASSPASSPASSPASSFAILFAIL
part-name-idl.html4/44/44/44/44/40/4
part-nested-pseudo.htmlPASSPASSPASSPASSPASSFAIL
precedence-part-vs-part.htmlPASSPASSPASSPASSPASSFAIL
pseudo-classes-after-part.html67/6764/6762/6741/6756/670/67
pseudo-elements-after-part.html44/4438/4440/4431/4417/440/44
serialization.html3/33/33/33/33/30/3
simple-forward-shorthand.htmlPASSPASSPASSPASSPASSFAIL
simple-forward.htmlPASSPASSPASSPASSPASSFAIL
simple-important-important.htmlPASSPASSPASSPASSPASSFAIL
simple-important-inline.htmlPASSPASSPASSPASSPASSFAIL
simple-important.htmlPASSPASSPASSPASSPASSFAIL
simple-inline.htmlPASSPASSPASSPASSPASSFAIL
simple.htmlPASSPASSPASSPASSPASSFAIL
style-sharing.htmlPASSPASSPASSPASSPASSFAIL