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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-display

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total26.70%(57/213)26.76%(57/213)26.76%
run-in30.00%(40/133)30.08%(40/133)30.08%
TestSubtestsSubtest %Status
display-change-iframe.html(0/1)0.00%FAIL
display-change-object-iframe.html(0/1)0.00%FAIL
display-contents-alignment-001.html(1/1)100.00%PASS
display-contents-alignment-002.html(1/1)100.00%PASS
display-contents-before-after-001.html(0/1)0.00%CRASH
display-contents-before-after-002.html(1/1)100.00%PASS
display-contents-before-after-003.html(0/1)0.00%CRASH
display-contents-block-001.html(1/1)100.00%PASS
display-contents-block-002.html(1/1)100.00%PASS
display-contents-button.html(0/1)0.00%CRASH
display-contents-details-001.html(1/1)100.00%PASS
display-contents-details.html(0/1)0.00%CRASH
display-contents-dynamic-before-after-001.html(0/1)0.00%CRASH
display-contents-dynamic-before-after-first-letter-001.html(0/1)0.00%CRASH
display-contents-dynamic-fieldset-legend-001.html(0/1)0.00%FAIL
display-contents-dynamic-flex-001-inline.html(0/1)0.00%CRASH
display-contents-dynamic-flex-001-none.html(0/1)0.00%CRASH
display-contents-dynamic-flex-002-inline.html(0/1)0.00%CRASH
display-contents-dynamic-flex-002-none.html(0/1)0.00%CRASH
display-contents-dynamic-flex-003-inline.html(0/1)0.00%CRASH
display-contents-dynamic-flex-003-none.html(0/1)0.00%CRASH
display-contents-dynamic-generated-content-fieldset-001.html(1/1)100.00%PASS
display-contents-dynamic-inline-flex-001-inline.html(0/1)0.00%CRASH
display-contents-dynamic-inline-flex-001-none.html(0/1)0.00%CRASH
display-contents-dynamic-list-001-inline.html(0/1)0.00%CRASH
display-contents-dynamic-list-001-none.html(0/1)0.00%CRASH
display-contents-dynamic-multicol-001-inline.html(1/1)100.00%PASS
display-contents-dynamic-multicol-001-none.html(1/1)100.00%PASS
display-contents-dynamic-pseudo-insertion-001.html(0/1)0.00%FAIL
display-contents-dynamic-table-001-inline.html(0/1)0.00%CRASH
display-contents-dynamic-table-001-none.html(0/1)0.00%CRASH
display-contents-dynamic-table-002-inline.html(0/1)0.00%FAIL
display-contents-dynamic-table-002-none.html(0/1)0.00%FAIL
display-contents-fieldset-002.html(0/1)0.00%FAIL
display-contents-fieldset-nested-legend.html(0/1)0.00%FAIL
display-contents-fieldset.html(0/1)0.00%CRASH
display-contents-first-letter-001.html(0/1)0.00%FAIL
display-contents-first-letter-002.html(0/1)0.00%FAIL
display-contents-first-line-001.html(0/1)0.00%FAIL
display-contents-first-line-002.html(0/1)0.00%FAIL
display-contents-flex-001.html(0/1)0.00%CRASH
display-contents-flex-002.html(0/1)0.00%CRASH
display-contents-flex-003.html(0/1)0.00%CRASH
display-contents-float-001.html(0/1)0.00%CRASH
display-contents-inline-001.html(1/1)100.00%PASS
display-contents-inline-002.html(0/1)0.00%FAIL
display-contents-inline-flex-001.html(0/1)0.00%CRASH
display-contents-line-height.html(0/1)0.00%CRASH
display-contents-list-001.html(0/1)0.00%CRASH
display-contents-multicol-001.html(1/1)100.00%PASS
display-contents-oof-001.html(0/1)0.00%CRASH
display-contents-oof-002.html(0/1)0.00%CRASH
display-contents-root-background.html(0/1)0.00%FAIL
display-contents-shadow-dom-1.html(0/1)0.00%CRASH
display-contents-shadow-host-whitespace.html(0/1)0.00%FAIL
display-contents-sharing-001.html(1/1)100.00%PASS
display-contents-slot-attach-whitespace.html(1/1)100.00%PASS
display-contents-state-change-001.html(0/1)0.00%FAIL
display-contents-suppression-dynamic-001.html(1/1)100.00%PASS
display-contents-svg-elements.html(0/1)0.00%FAIL
display-contents-table-001.html(0/1)0.00%CRASH
display-contents-table-002.html(0/1)0.00%FAIL
display-contents-table-003.html(0/1)0.00%CRASH
display-contents-td-001.html(0/1)0.00%FAIL
display-contents-text-inherit-002.html(0/1)0.00%FAIL
display-contents-text-inherit.html(0/1)0.00%CRASH
display-contents-text-only-001.html(0/1)0.00%CRASH
display-contents-tr-001.html(0/1)0.00%FAIL
display-contents-unusual-html-elements-none.html(0/1)0.00%FAIL
display-contents-whitespace-inside-inline.html(1/1)100.00%PASS
display-first-line-002.html(0/1)0.00%FAIL
display-flow-root-001.html(1/1)100.00%PASS
display-flow-root-002.html(0/1)0.00%FAIL
display-flow-root-dynamic.html(0/1)0.00%FAIL
display-flow-root-list-item-001.html(0/1)0.00%FAIL
display-inline-dynamic-001.html(0/1)0.00%FAIL
display-math-on-pseudo-elements-002.html(0/1)0.00%FAIL
display-none-inline-img.html(1/1)100.00%PASS
order-dynamic.html(0/1)0.00%FAIL
select-4-option-optgroup-display-none.html(0/1)0.00%FAIL