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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 / CSS2 / fonts

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total79.30%(127/160)79.38%(127/160)79.38%
TestSubtestsSubtest %Status
font-003.xht(1/1)100.00%PASS
font-011.xht(0/1)0.00%FAIL
font-012.xht(0/1)0.00%FAIL
font-013.xht(0/1)0.00%FAIL
font-014.xht(0/1)0.00%FAIL
font-015.xht(0/1)0.00%FAIL
font-016.xht(0/1)0.00%FAIL
font-029.xht(0/1)0.00%FAIL
font-030.xht(0/1)0.00%FAIL
font-031.xht(0/1)0.00%FAIL
font-032.xht(0/1)0.00%FAIL
font-042.xht(0/1)0.00%FAIL
font-043.xht(0/1)0.00%FAIL
font-051.xht(1/1)100.00%PASS
font-146.xht(1/1)100.00%PASS
font-148.xht(1/1)100.00%PASS
font-applies-to-001.xht(1/1)100.00%PASS
font-applies-to-002.xht(1/1)100.00%PASS
font-applies-to-005.xht(1/1)100.00%PASS
font-applies-to-006.xht(1/1)100.00%PASS
font-applies-to-007.xht(1/1)100.00%PASS
font-applies-to-008.xht(1/1)100.00%PASS
font-applies-to-009.xht(1/1)100.00%PASS
font-applies-to-010.xht(1/1)100.00%PASS
font-applies-to-011.xht(1/1)100.00%PASS
font-applies-to-014.xht(1/1)100.00%PASS
font-applies-to-015.xht(0/1)0.00%FAIL
font-applies-to-016.xht(1/1)100.00%PASS
font-applies-to-017.xht(1/1)100.00%PASS
font-family-008.xht(1/1)100.00%PASS
font-family-009.xht(1/1)100.00%PASS
font-family-011.xht(1/1)100.00%PASS
font-family-013.xht(1/1)100.00%PASS
font-family-014.xht(1/1)100.00%PASS
font-family-applies-to-001.xht(0/1)0.00%FAIL
font-family-applies-to-002.xht(0/1)0.00%FAIL
font-family-applies-to-005.xht(1/1)100.00%PASS
font-family-applies-to-006.xht(0/1)0.00%FAIL
font-family-applies-to-007.xht(0/1)0.00%FAIL
font-family-applies-to-008.xht(0/1)0.00%FAIL
font-family-applies-to-009.xht(0/1)0.00%FAIL
font-family-applies-to-010.xht(0/1)0.00%FAIL
font-family-applies-to-011.xht(0/1)0.00%FAIL
font-family-applies-to-014.xht(0/1)0.00%FAIL
font-family-applies-to-015.xht(0/1)0.00%FAIL
font-family-applies-to-016.xht(1/1)100.00%PASS
font-family-applies-to-017.xht(0/1)0.00%FAIL
font-family-invalid-characters-001.xht(1/1)100.00%PASS
font-family-invalid-characters-002.xht(1/1)100.00%PASS
font-family-invalid-characters-003.xht(1/1)100.00%PASS
font-family-invalid-characters-004.xht(1/1)100.00%PASS
font-family-invalid-characters-005.xht(1/1)100.00%PASS
font-family-invalid-characters-006.xht(1/1)100.00%PASS
font-family-rule-001.xht(0/1)0.00%FAIL
font-family-rule-002a.xht(0/1)0.00%FAIL
font-family-rule-005.xht(0/1)0.00%FAIL
font-family-valid-characters-001.xht(1/1)100.00%PASS
font-family-valid-characters-002.xht(1/1)100.00%PASS
font-matching-rule-009.xht(1/1)100.00%PASS
font-size-001.xht(1/1)100.00%PASS
font-size-002.xht(1/1)100.00%PASS
font-size-004.xht(1/1)100.00%PASS
font-size-005.xht(1/1)100.00%PASS
font-size-012.xht(1/1)100.00%PASS
font-size-013.xht(1/1)100.00%PASS
font-size-015.xht(1/1)100.00%PASS
font-size-016.xht(1/1)100.00%PASS
font-size-023.xht(1/1)100.00%PASS
font-size-024.xht(1/1)100.00%PASS
font-size-026.xht(1/1)100.00%PASS
font-size-027.xht(1/1)100.00%PASS
font-size-034.xht(1/1)100.00%PASS
font-size-035.xht(1/1)100.00%PASS
font-size-037.xht(1/1)100.00%PASS
font-size-038.xht(1/1)100.00%PASS
font-size-045.xht(1/1)100.00%PASS
font-size-046.xht(1/1)100.00%PASS
font-size-048.xht(1/1)100.00%PASS
font-size-049.xht(1/1)100.00%PASS
font-size-056.xht(1/1)100.00%PASS
font-size-057.xht(1/1)100.00%PASS
font-size-059.xht(1/1)100.00%PASS
font-size-060.xht(1/1)100.00%PASS
font-size-067.xht(1/1)100.00%PASS
font-size-068.xht(1/1)100.00%PASS
font-size-070.xht(1/1)100.00%PASS
font-size-071.xht(1/1)100.00%PASS
font-size-078.xht(1/1)100.00%PASS
font-size-079.xht(1/1)100.00%PASS
font-size-081.xht(1/1)100.00%PASS
font-size-082.xht(1/1)100.00%PASS
font-size-089.xht(1/1)100.00%PASS
font-size-090.xht(1/1)100.00%PASS
font-size-092.xht(1/1)100.00%PASS
font-size-093.xht(1/1)100.00%PASS
font-size-100.xht(1/1)100.00%PASS
font-size-101.xht(1/1)100.00%PASS
font-size-102.xht(1/1)100.00%PASS
font-size-119.xht(1/1)100.00%PASS
font-size-120.xht(1/1)100.00%PASS
font-size-121.xht(0/1)0.00%FAIL
font-size-122.xht(0/1)0.00%FAIL
font-size-123.xht(1/1)100.00%PASS
font-size-124.xht(0/1)0.00%FAIL
font-size-applies-to-016.xht(1/1)100.00%PASS
font-style-applies-to-001.xht(1/1)100.00%PASS
font-style-applies-to-002.xht(1/1)100.00%PASS
font-style-applies-to-005.xht(1/1)100.00%PASS
font-style-applies-to-006.xht(1/1)100.00%PASS
font-style-applies-to-007.xht(1/1)100.00%PASS
font-style-applies-to-008.xht(1/1)100.00%PASS
font-style-applies-to-009.xht(1/1)100.00%PASS
font-style-applies-to-010.xht(1/1)100.00%PASS
font-style-applies-to-011.xht(1/1)100.00%PASS
font-style-applies-to-014.xht(1/1)100.00%PASS
font-style-applies-to-016.xht(1/1)100.00%PASS
font-style-applies-to-017.xht(1/1)100.00%PASS
font-variant-001.xht(1/1)100.00%PASS
font-variant-applies-to-001.xht(1/1)100.00%PASS
font-variant-applies-to-002.xht(1/1)100.00%PASS
font-variant-applies-to-005.xht(1/1)100.00%PASS
font-variant-applies-to-006.xht(1/1)100.00%PASS
font-variant-applies-to-007.xht(1/1)100.00%PASS
font-variant-applies-to-008.xht(1/1)100.00%PASS
font-variant-applies-to-009.xht(1/1)100.00%PASS
font-variant-applies-to-010.xht(1/1)100.00%PASS
font-variant-applies-to-011.xht(1/1)100.00%PASS
font-variant-applies-to-014.xht(1/1)100.00%PASS
font-variant-applies-to-015.xht(0/1)0.00%FAIL
font-variant-applies-to-016.xht(1/1)100.00%PASS
font-variant-applies-to-017.xht(1/1)100.00%PASS
font-weight-applies-to-001.xht(1/1)100.00%PASS
font-weight-applies-to-002.xht(1/1)100.00%PASS
font-weight-applies-to-005.xht(1/1)100.00%PASS
font-weight-applies-to-006.xht(1/1)100.00%PASS
font-weight-applies-to-007.xht(1/1)100.00%PASS
font-weight-applies-to-008.xht(1/1)100.00%PASS
font-weight-applies-to-009.xht(1/1)100.00%PASS
font-weight-applies-to-010.xht(1/1)100.00%PASS
font-weight-applies-to-011.xht(1/1)100.00%PASS
font-weight-applies-to-014.xht(1/1)100.00%PASS
font-weight-applies-to-015.xht(0/1)0.00%FAIL
font-weight-applies-to-016.xht(1/1)100.00%PASS
font-weight-applies-to-017.xht(1/1)100.00%PASS
font-weight-rule-001.xht(1/1)100.00%PASS
font-weight-rule-003.xht(1/1)100.00%PASS
font-weight-rule-004.xht(1/1)100.00%PASS
font-weight-rule-005.xht(1/1)100.00%PASS
font-weight-rule-006.xht(1/1)100.00%PASS
font-weight-rule-007.xht(1/1)100.00%PASS
font-weight-rule-008.xht(1/1)100.00%PASS
fonts-010.xht(1/1)100.00%PASS
fonts-011.xht(1/1)100.00%PASS
fonts-012.xht(0/1)0.00%FAIL
fonts-013.xht(1/1)100.00%PASS
fonts-014.xht(1/1)100.00%PASS
shand-font-000.xht(1/1)100.00%PASS
shand-font-001.xht(1/1)100.00%PASS
shand-font-002.xht(1/1)100.00%PASS
shand-font-003.xht(1/1)100.00%PASS