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Status

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

CSS PropertiesHTML ElementsEventsWPT TestsWPT History

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.


wpt / css / css-ui / parsing

Score history
1 month3 months6 months1 yearAll time
0%20%40%60%80%100%Sep 2026css/css-ui/parsing

Data from commit:
a50cb89 wpt: run reference-named files which are themselves tests (#836) (2026-09-03)

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total73.40%(25/42)59.52%(244/364)67.03%
TestSubtestsSubtest %Status
box-sizing-computed.html(2/2)100.00%PASS
box-sizing-invalid.html(6/6)100.00%PASS
box-sizing-valid.html(2/2)100.00%PASS
canonical-order-outline-sub-properties-001.html(0/26)0.00%FAIL
caret-color-computed.html(4/12)33.33%FAIL
caret-color-invalid.html(12/12)100.00%PASS
caret-color-valid.html(8/15)53.33%FAIL
cursor-computed.html(36/39)92.31%FAIL
cursor-invalid.html(10/10)100.00%PASS
cursor-valid.html(42/46)91.30%FAIL
field-sizing-computed.html(0/2)0.00%FAIL
field-sizing-invalid.html(7/7)100.00%PASS
field-sizing-valid.html(0/2)0.00%FAIL
interactivity-computed.html(0/46)0.00%FAIL
interactivity.html(3/9)33.33%FAIL
outline-color-computed.html(2/3)66.67%FAIL
outline-color-invalid.html(3/3)100.00%PASS
outline-color-valid.html(1/2)50.00%FAIL
outline-invalid.html(4/4)100.00%PASS
outline-offset-computed.html(6/7)85.71%FAIL
outline-offset-invalid.html(5/5)100.00%PASS
outline-offset-valid.html(4/5)80.00%FAIL
outline-shorthand.html(4/4)100.00%PASS
outline-style-computed.html(10/10)100.00%PASS
outline-style-invalid.html(3/3)100.00%PASS
outline-style-valid.html(10/10)100.00%PASS
outline-valid.html(20/20)100.00%PASS
outline-width-computed.html(9/9)100.00%PASS
outline-width-invalid.html(3/3)100.00%PASS
outline-width-valid.html(7/7)100.00%PASS
resize-computed.html(0/6)0.00%FAIL
resize-invalid.html(4/4)100.00%PASS
resize-valid.html(0/4)0.00%FAIL
text-overflow-computed.html(2/2)100.00%PASS
text-overflow-invalid.html(2/2)100.00%PASS
text-overflow-valid.html(2/2)100.00%PASS
user-select-computed-contain.html(0/1)0.00%FAIL
user-select-computed.html(4/4)100.00%PASS
user-select-invalid.html(2/2)100.00%PASS
user-select-valid-contain.html(0/1)0.00%FAIL
user-select-valid.html(4/4)100.00%PASS
webkit-appearance-alias.html(1/1)100.00%PASS