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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:
1093b86 wpt: skip non-UTF-8 test files instead of crashing (#659) (2026-08-09)

wpt / css / css-cascade

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total64.50%(35/55)63.64%(43/70)61.43%
TestSubtestsSubtest %Status
all-prop-001.html(0/1)0.00%FAIL
all-prop-002.html(0/1)0.00%FAIL
all-prop-inherit-color.html(1/1)100.00%PASS
all-prop-initial-color.html(1/1)100.00%PASS
all-prop-initial-visited.html(0/1)0.00%FAIL
all-prop-revert-color.html(1/1)100.00%PASS
all-prop-revert-visited.html(1/1)100.00%PASS
all-prop-unset-color.html(1/1)100.00%PASS
all-prop-unset-visited.html(1/1)100.00%PASS
import-conditional-001.html(1/1)100.00%PASS
import-conditional-002.html(1/1)100.00%PASS
import-removal.html(0/1)0.00%FAIL
important-prop.html(1/1)100.00%PASS
initial-background-color.html(1/1)100.00%PASS
initial-color-background-001.html(1/1)100.00%PASS
layer-media-toggle.html(1/1)100.00%PASS
layer-namespace-sandwich-crash.html(1/1)100.00%PASS
layer-slotted-rule.html(0/1)0.00%FAIL
layer-statement-copy-crash.html(1/1)100.00%PASS
layer-stylesheet-sharing-important.html(1/1)100.00%PASS
layer-stylesheet-sharing.html(1/1)100.00%PASS
presentational-hints-rollback.html(8/16)50.00%FAIL
revert-layer-001.html(1/1)100.00%PASS
revert-layer-002.html(1/1)100.00%PASS
revert-layer-003.html(1/1)100.00%PASS
revert-layer-004.html(0/1)0.00%FAIL
revert-layer-005.html(1/1)100.00%PASS
revert-layer-006.html(1/1)100.00%PASS
revert-layer-007.html(1/1)100.00%PASS
revert-layer-009.html(1/1)100.00%PASS
revert-layer-010.html(1/1)100.00%PASS
revert-layer-011.html(1/1)100.00%PASS
revert-layer-012.html(1/1)100.00%PASS
revert-layer-013.html(0/1)0.00%FAIL
revert-layer-014.html(0/1)0.00%FAIL
revert-layer-015.html(1/1)100.00%PASS
revert-val-001.html(1/1)100.00%PASS
revert-val-002.html(1/1)100.00%PASS
scope-declaration-list-crash.html(1/1)100.00%PASS
scope-featureless.html(1/1)100.00%PASS
scope-implicit-001-print.html(0/1)0.00%FAIL
scope-implicit-002-print.html(0/1)0.00%FAIL
scope-implicit-003-print.html(0/1)0.00%FAIL
scope-implicit-004-print.xhtml(0/1)0.00%FAIL
scope-implicit-005-print.html(0/1)0.00%FAIL
scope-implicit-006-print.html(0/1)0.00%FAIL
scope-implicit-crash-print.html(1/1)100.00%PASS
scope-inner-pseudo-scope-crash.html(1/1)100.00%PASS
scope-part.html(0/1)0.00%FAIL
scope-pseudo-element.html(0/1)0.00%FAIL
scope-shadow-sharing.html(0/1)0.00%FAIL
scope-ua-shadow-host.html(0/1)0.00%FAIL
scope-visited.html(0/1)0.00%FAIL
unset-val-001.html(1/1)100.00%PASS
unset-val-002.html(1/1)100.00%PASS