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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:
5081c65 Table: pass calc() cell widths through to Taffy for column sizing (#653) (2026-08-09)

wpt / css / CSS2 / floats

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total59.40%(66/111)59.46%(66/111)59.46%
TestSubtestsSubtest %Status
adjoining-floats-dynamic.html(0/1)0.00%FAIL
block-in-inline-become-float.html(0/1)0.00%FAIL
float-after-block-with-collapsed-margin-inside-inline.html(1/1)100.00%PASS
float-in-inline-001.html(1/1)100.00%PASS
float-in-inline-002.html(1/1)100.00%PASS
float-in-inline-anonymous-block-with-overflow-hidden.html(1/1)100.00%PASS
float-no-content-beside-001.html(0/1)0.00%FAIL
float-nowrap-2.html(1/1)100.00%PASS
float-nowrap-3.html(0/1)0.00%FAIL
float-nowrap-4.html(1/1)100.00%PASS
float-nowrap-5.html(0/1)0.00%FAIL
float-nowrap-6.html(0/1)0.00%FAIL
float-nowrap-7.html(1/1)100.00%PASS
float-nowrap-8.html(1/1)100.00%PASS
float-nowrap-9.html(0/1)0.00%FAIL
float-nowrap-hyphen-rewind-1.html(1/1)100.00%PASS
float-paint-relayout.html(0/1)0.00%FAIL
float-root.html(0/1)0.00%FAIL
float-table-align-left-quirk.html(0/1)0.00%FAIL
float-under-flatten-under-preserve-3d.html(1/1)100.00%PASS
float-with-absolutely-positioned-child-with-static-inset.html(1/1)100.00%PASS
floated-table-wider-than-specified.html(0/1)0.00%FAIL
floats-in-table-caption-001.html(0/1)0.00%FAIL
floats-line-wrap-shifted-001.html(0/1)0.00%FAIL
floats-placement-001.html(1/1)100.00%PASS
floats-placement-002.html(1/1)100.00%PASS
floats-placement-003.html(1/1)100.00%PASS
floats-placement-004.html(0/1)0.00%FAIL
floats-placement-005.html(0/1)0.00%FAIL
floats-placement-006.html(1/1)100.00%PASS
floats-placement-007.html(1/1)100.00%PASS
floats-placement-008.html(1/1)100.00%PASS
floats-placement-vertical-001a.xht(1/1)100.00%PASS
floats-placement-vertical-001b.xht(1/1)100.00%PASS
floats-placement-vertical-001c.xht(1/1)100.00%PASS
floats-placement-vertical-003.xht(0/1)0.00%FAIL
floats-placement-vertical-004-ref2.xht(1/1)100.00%PASS
floats-placement-vertical-004.xht(0/1)0.00%FAIL
floats-rule3-outside-left-001.xht(1/1)100.00%PASS
floats-rule3-outside-left-002.xht(1/1)100.00%PASS
floats-rule3-outside-right-001.xht(1/1)100.00%PASS
floats-rule3-outside-right-002.xht(1/1)100.00%PASS
floats-rule7-outside-left-001.xht(1/1)100.00%PASS
floats-rule7-outside-right-001.xht(1/1)100.00%PASS
floats-wrap-bfc-001-left-overflow.xht(1/1)100.00%PASS
floats-wrap-bfc-001-left-table.xht(1/1)100.00%PASS
floats-wrap-bfc-001-right-overflow.xht(1/1)100.00%PASS
floats-wrap-bfc-001-right-table.xht(1/1)100.00%PASS
floats-wrap-bfc-002-left-overflow.xht(1/1)100.00%PASS
floats-wrap-bfc-002-left-table.xht(1/1)100.00%PASS
floats-wrap-bfc-002-right-overflow.xht(1/1)100.00%PASS
floats-wrap-bfc-002-right-table.xht(1/1)100.00%PASS
floats-wrap-bfc-003-left-overflow.xht(1/1)100.00%PASS
floats-wrap-bfc-003-left-table.xht(0/1)0.00%FAIL
floats-wrap-bfc-003-right-overflow.xht(1/1)100.00%PASS
floats-wrap-bfc-003-right-table.xht(0/1)0.00%FAIL
floats-wrap-bfc-004.xht(0/1)0.00%FAIL
floats-wrap-bfc-005.xht(1/1)100.00%PASS
floats-wrap-bfc-006.xht(0/1)0.00%FAIL
floats-wrap-bfc-007.xht(1/1)100.00%PASS
floats-wrap-bfc-008.html(1/1)100.00%PASS
floats-wrap-bfc-outside-001.xht(1/1)100.00%PASS
floats-wrap-bfc-with-margin-001.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-001a.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-002.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-003.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-004.html(0/1)0.00%FAIL
floats-wrap-bfc-with-margin-005.html(0/1)0.00%FAIL
floats-wrap-bfc-with-margin-006.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-007.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-008.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-009.tentative.html(1/1)100.00%PASS
floats-wrap-bfc-with-margin-010.html(0/1)0.00%FAIL
floats-wrap-top-below-bfc-001l.xht(0/1)0.00%FAIL
floats-wrap-top-below-bfc-001r.xht(0/1)0.00%FAIL
floats-wrap-top-below-bfc-002l.xht(0/1)0.00%FAIL
floats-wrap-top-below-bfc-002r.xht(0/1)0.00%FAIL
floats-wrap-top-below-bfc-003l.xht(0/1)0.00%FAIL
floats-wrap-top-below-bfc-003r.xht(0/1)0.00%FAIL
floats-wrap-top-below-inline-001l.xht(0/1)0.00%FAIL
floats-wrap-top-below-inline-001r.xht(0/1)0.00%FAIL
floats-wrap-top-below-inline-002l.xht(0/1)0.00%FAIL
floats-wrap-top-below-inline-002r.xht(0/1)0.00%FAIL
floats-wrap-top-below-inline-003l.xht(0/1)0.00%FAIL
floats-wrap-top-below-inline-003r.xht(0/1)0.00%FAIL
floats-zero-height-wrap-001.xht(0/1)0.00%FAIL
floats-zero-height-wrap-002.xht(0/1)0.00%FAIL
intrinsic-size-float-and-line.html(0/1)0.00%FAIL
negative-block-margin-pushing-float-out-of-block-formatting-context.html(1/1)100.00%PASS
negative-margin-float-positioning.html(1/1)100.00%PASS
new-fc-beside-adjoining-float-2.html(1/1)100.00%PASS
new-fc-beside-adjoining-float.html(1/1)100.00%PASS
new-fc-beside-float-with-margin-rtl.html(1/1)100.00%PASS
new-fc-beside-float-with-margin.html(1/1)100.00%PASS
new-fc-beside-float-with-min-width.html(1/1)100.00%PASS
new-fc-relayout.html(1/1)100.00%PASS
new-fc-separates-from-float-2.html(1/1)100.00%PASS
new-fc-separates-from-float-3.html(1/1)100.00%PASS
new-fc-separates-from-float-4.html(1/1)100.00%PASS
new-fc-separates-from-float.html(1/1)100.00%PASS
overflow-scroll-float-paint-order.html(1/1)100.00%PASS
overhanging-float-paint-order.html(0/1)0.00%FAIL
remove-block-between-inline-and-float.html(0/1)0.00%FAIL
table-sizing-with-adjacent-floats.html(0/1)0.00%FAIL
zero-available-space-float-positioning.html(1/1)100.00%PASS
zero-space-between-floats-001.html(1/1)100.00%PASS
zero-space-between-floats-002.html(1/1)100.00%PASS
zero-space-between-floats-003.html(0/1)0.00%FAIL
zero-space-between-floats-004.html(1/1)100.00%PASS
zero-width-floats-positioning.tentative.html(0/1)0.00%FAIL
zero-width-floats.html(0/1)0.00%FAIL