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Status

This page documents the implementation status of various HTML and CSS features in Blitz.

CSS PropertiesHTML ElementsEventsWPT Tests

This page documents Blitz's scores on the "css" subsuite of the Web Platform Tests.

Note: As it does not have a JavaScript engine, Blitz can only run about 20% of the total subtests. In the numbers below, tests that Blitz can't run are ignored and percentages are relative to the number of tests run.

Data from commit:
708eb61 WPT runner: support mismatch reftests and multiple rel=match links (#665) (2026-08-09)

wpt / css / css-counter-styles / counter-style-at-rule

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total16.60%(8/48)16.67%(8/48)16.67%
TestSubtestsSubtest %Status
access-from-shadow-dom.html(0/1)0.00%FAIL
broken-symbols.html(0/1)0.00%FAIL
dependent-builtin.html(0/1)0.00%FAIL
descriptor-calc.html(1/1)100.00%PASS
descriptor-fallback-invalid.html(0/1)0.00%FAIL
descriptor-fallback.html(0/1)0.00%FAIL
descriptor-negative-invalid.html(0/1)0.00%FAIL
descriptor-negative.html(0/1)0.00%FAIL
descriptor-pad-invalid.html(0/1)0.00%FAIL
descriptor-pad.html(0/1)0.00%FAIL
descriptor-prefix-invalid.html(0/1)0.00%FAIL
descriptor-prefix.html(0/1)0.00%FAIL
descriptor-range-invalid.html(0/1)0.00%FAIL
descriptor-range.html(0/1)0.00%FAIL
descriptor-suffix-invalid.html(0/1)0.00%FAIL
descriptor-suffix.html(0/1)0.00%FAIL
descriptor-symbols-invalid.html(0/1)0.00%FAIL
descriptor-symbols.html(0/1)0.00%FAIL
disclosure-closed-extends-direction-001.html(0/1)0.00%FAIL
disclosure-closed-extends-direction-002.html(0/1)0.00%FAIL
disclosure-closed-extends-direction-003.html(0/1)0.00%FAIL
disclosure-open-vs-closed-001.html(0/1)0.00%FAIL
disclosure-open-vs-closed-002.html(0/1)0.00%FAIL
disclosure-styles.html(0/1)0.00%FAIL
empty-string-symbol.html(1/1)100.00%PASS
fallbacks-in-shadow-dom.html(0/1)0.00%FAIL
name-case-sensitivity.html(1/1)100.00%PASS
override-in-shadow-dom.html(0/1)0.00%FAIL
redefine-attr-mapping.html(1/1)100.00%PASS
redefine-builtin.html(1/1)100.00%PASS
shadow-dom-part.html(0/1)0.00%FAIL
symbols-function-invalid.html(1/1)100.00%PASS
symbols-function.html(1/1)100.00%PASS
system-additive-invalid.html(0/1)0.00%FAIL
system-additive.html(0/1)0.00%FAIL
system-alphabetic-invalid.html(0/1)0.00%FAIL
system-alphabetic.html(0/1)0.00%FAIL
system-cyclic-invalid.html(0/1)0.00%FAIL
system-cyclic.html(0/1)0.00%FAIL
system-extends-fixed.html(1/1)100.00%PASS
system-extends-invalid.html(0/1)0.00%FAIL
system-extends.html(0/1)0.00%FAIL
system-fixed-invalid.html(0/1)0.00%FAIL
system-fixed.html(0/1)0.00%FAIL
system-numeric-invalid.html(0/1)0.00%FAIL
system-numeric.html(0/1)0.00%FAIL
system-symbolic-invalid.html(0/1)0.00%FAIL
system-symbolic.html(0/1)0.00%FAIL