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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-conditional / container-queries

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total43.20%(29/67)43.28%(29/67)43.28%
crashtests100.00%(16/16)100.00%(16/16)100.00%
TestSubtestsSubtest %Status
canvas-as-container-001.html(0/1)0.00%FAIL
canvas-as-container-002.html(0/1)0.00%FAIL
canvas-as-container-003.html(0/1)0.00%FAIL
canvas-as-container-004.html(0/1)0.00%FAIL
change-display-in-container.html(0/1)0.00%FAIL
chrome-legacy-skip-recalc.html(0/1)0.00%FAIL
container-for-cue.html(1/1)100.00%PASS
container-units-gradient-invalidation.html(0/1)0.00%FAIL
container-units-gradient.html(0/1)0.00%FAIL
container-units-rule-cache.html(0/1)0.00%FAIL
container-units-selection-pseudo.html(1/1)100.00%PASS
container-units-sharing-via-rule-node.html(0/1)0.00%FAIL
counters-in-container-dynamic.html(0/1)0.00%FAIL
counters-in-container.html(0/1)0.00%FAIL
custom-layout-container-001.https.html(0/1)0.00%FAIL
dialog-backdrop-create.html(0/1)0.00%FAIL
dialog-backdrop-remove.html(1/1)100.00%PASS
display-in-container.html(0/1)0.00%FAIL
fieldset-legend-change.html(0/1)0.00%FAIL
first-letter-outside-size-container.html(0/1)0.00%FAIL
flex-basis-with-container-type.html(0/1)0.00%FAIL
inline-size-bfc-floats.html(0/1)0.00%FAIL
inner-first-line-non-matching.html(0/1)0.00%FAIL
multicol-inside-container.html(0/1)0.00%FAIL
multiple-conditions-001.html(0/1)0.00%FAIL
no-layout-containment-abspos-dynamic.html(0/1)0.00%FAIL
no-layout-containment-abspos.html(0/1)0.00%FAIL
no-layout-containment-baseline.html(1/1)100.00%PASS
no-layout-containment-fixedpos-dynamic.html(0/1)0.00%FAIL
no-layout-containment-fixedpos.html(0/1)0.00%FAIL
no-layout-containment-scroll.html(1/1)100.00%PASS
no-layout-containment-subgrid-crash.html(1/1)100.00%PASS
position-sticky-crash.html(1/1)100.00%PASS
pseudo-elements-002.html(0/1)0.00%FAIL
pseudo-elements-002b.html(0/1)0.00%FAIL
pseudo-elements-009.html(0/1)0.00%FAIL
pseudo-elements-010.html(0/1)0.00%FAIL
pseudo-elements-011.html(0/1)0.00%FAIL
pseudo-elements-012.html(0/1)0.00%FAIL
query-style-color.html(0/1)0.00%FAIL
resize-while-content-visibility-hidden.html(0/1)0.00%FAIL
scrollbar-container-units-block.html(0/1)0.00%FAIL
scrollbar-container-units-inline.html(1/1)100.00%PASS
size-container-popover-change.html(1/1)100.00%PASS
size-container-with-quotes.html(1/1)100.00%PASS
style-negation-with-container-name.html(0/1)0.00%FAIL
svg-foreignobject-no-size-container.html(1/1)100.00%PASS
svg-g-no-size-container.html(1/1)100.00%PASS
table-inside-container-changing-display.html(0/1)0.00%FAIL
top-layer-dialog-backdrop.html(1/1)100.00%PASS
whitespace-update-after-removal.html(0/1)0.00%FAIL