Click here to download the Blitz Browser!

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 / css1

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total56.70%(93/164)56.71%(93/164)56.71%
TestSubtestsSubtest %Status
c11-import-000.xht(1/1)100.00%PASS
c12-grouping-000.xht(1/1)100.00%PASS
c13-inheritance-000.xht(1/1)100.00%PASS
c14-classes-000.xht(1/1)100.00%PASS
c15-ids-000.xht(1/1)100.00%PASS
c15-ids-001.xht(1/1)100.00%PASS
c16-descendant-000.xht(1/1)100.00%PASS
c16-descendant-001.xht(1/1)100.00%PASS
c16-descendant-002.xht(1/1)100.00%PASS
c17-comments-000.xht(1/1)100.00%PASS
c17-comments-001.xht(1/1)100.00%PASS
c25-pseudo-elmnt-000.xht(0/1)0.00%FAIL
c31-important-000.xht(1/1)100.00%PASS
c32-cascading-000.xht(0/1)0.00%FAIL
c412-blockw-000.xht(1/1)100.00%PASS
c412-hz-box-000.xht(1/1)100.00%PASS
c414-flt-fit-000.xht(0/1)0.00%FAIL
c414-flt-fit-001.xht(0/1)0.00%FAIL
c414-flt-fit-002.xht(1/1)100.00%PASS
c414-flt-fit-003.xht(1/1)100.00%PASS
c414-flt-fit-004.xht(0/1)0.00%FAIL
c414-flt-fit-005.xht(1/1)100.00%PASS
c414-flt-fit-006.xht(1/1)100.00%PASS
c414-flt-wrap-001.xht(1/1)100.00%PASS
c42-ibx-ht-000.xht(0/1)0.00%FAIL
c42-ibx-pad-000.xht(0/1)0.00%FAIL
c43-rpl-bbx-002.xht(1/1)100.00%PASS
c43-rpl-ibx-000.xht(0/1)0.00%FAIL
c44-ln-box-000.xht(0/1)0.00%FAIL
c44-ln-box-001.xht(0/1)0.00%FAIL
c44-ln-box-002.xht(0/1)0.00%FAIL
c44-ln-box-003.xht(0/1)0.00%FAIL
c45-bg-canvas-000.xht(1/1)100.00%PASS
c526-font-sz-001.xht(1/1)100.00%PASS
c526-font-sz-002.xht(1/1)100.00%PASS
c526-font-sz-003.xht(1/1)100.00%PASS
c531-color-000.xht(1/1)100.00%PASS
c532-bgcolor-000.xht(1/1)100.00%PASS
c532-bgcolor-001.xht(1/1)100.00%PASS
c533-bgimage-000.xht(1/1)100.00%PASS
c533-bgimage-001.xht(1/1)100.00%PASS
c534-bgre-000.xht(0/1)0.00%FAIL
c534-bgre-001.xht(0/1)0.00%FAIL
c534-bgreps-000.xht(1/1)100.00%PASS
c534-bgreps-001.xht(0/1)0.00%FAIL
c534-bgreps-002.xht(0/1)0.00%FAIL
c534-bgreps-003.xht(0/1)0.00%FAIL
c534-bgreps-004.xht(0/1)0.00%FAIL
c534-bgreps-005.xht(0/1)0.00%FAIL
c536-bgpos-000.xht(0/1)0.00%FAIL
c536-bgpos-001.xht(0/1)0.00%FAIL
c541-word-sp-000.xht(1/1)100.00%PASS
c541-word-sp-001.xht(0/1)0.00%FAIL
c542-letter-sp-000.xht(1/1)100.00%PASS
c542-letter-sp-001.xht(1/1)100.00%PASS
c544-valgn-001.xht(0/1)0.00%FAIL
c545-txttrans-000.xht(0/1)0.00%FAIL
c547-indent-000.xht(0/1)0.00%FAIL
c547-indent-001.xht(0/1)0.00%FAIL
c548-leadin-000.xht(0/1)0.00%FAIL
c548-ln-ht-000.xht(1/1)100.00%PASS
c548-ln-ht-001.xht(1/1)100.00%PASS
c548-ln-ht-002.xht(1/1)100.00%PASS
c548-ln-ht-003.xht(1/1)100.00%PASS
c548-ln-ht-004.xht(1/1)100.00%PASS
c5501-imrgn-t-000.xht(1/1)100.00%PASS
c5501-mrgn-t-000.xht(1/1)100.00%PASS
c5502-imrgn-r-000.xht(0/1)0.00%FAIL
c5502-imrgn-r-001.xht(1/1)100.00%PASS
c5502-imrgn-r-002.xht(0/1)0.00%FAIL
c5502-imrgn-r-003.xht(0/1)0.00%FAIL
c5502-imrgn-r-004.xht(0/1)0.00%FAIL
c5502-imrgn-r-005.xht(0/1)0.00%FAIL
c5502-imrgn-r-006.xht(0/1)0.00%FAIL
c5502-mrgn-r-000.xht(0/1)0.00%FAIL
c5502-mrgn-r-001.xht(1/1)100.00%PASS
c5502-mrgn-r-003.xht(1/1)100.00%PASS
c5503-imrgn-b-000.xht(1/1)100.00%PASS
c5503-mrgn-b-000.xht(1/1)100.00%PASS
c5504-imrgn-l-000.xht(0/1)0.00%FAIL
c5504-imrgn-l-001.xht(0/1)0.00%FAIL
c5504-imrgn-l-002.xht(0/1)0.00%FAIL
c5504-imrgn-l-003.xht(0/1)0.00%FAIL
c5504-imrgn-l-004.xht(0/1)0.00%FAIL
c5504-imrgn-l-005.xht(0/1)0.00%FAIL
c5504-imrgn-l-006.xht(0/1)0.00%FAIL
c5504-mrgn-l-000.xht(0/1)0.00%FAIL
c5504-mrgn-l-001.xht(1/1)100.00%PASS
c5504-mrgn-l-003.xht(1/1)100.00%PASS
c5505-imrgn-000.xht(0/1)0.00%FAIL
c5505-mrgn-000.xht(0/1)0.00%FAIL
c5505-mrgn-001.xht(1/1)100.00%PASS
c5505-mrgn-003.xht(1/1)100.00%PASS
c5506-ipadn-t-000.xht(0/1)0.00%FAIL
c5506-ipadn-t-001.xht(1/1)100.00%PASS
c5506-ipadn-t-002.xht(0/1)0.00%FAIL
c5506-padn-t-000.xht(0/1)0.00%FAIL
c5507-ipadn-r-000.xht(0/1)0.00%FAIL
c5507-ipadn-r-001.xht(1/1)100.00%PASS
c5507-ipadn-r-002.xht(0/1)0.00%FAIL
c5507-ipadn-r-003.xht(0/1)0.00%FAIL
c5507-ipadn-r-004.xht(0/1)0.00%FAIL
c5507-padn-r-000.xht(1/1)100.00%PASS
c5507-padn-r-001.xht(1/1)100.00%PASS
c5507-padn-r-002.xht(1/1)100.00%PASS
c5507-padn-r-003.xht(1/1)100.00%PASS
c5508-ipadn-b-000.xht(1/1)100.00%PASS
c5508-ipadn-b-001.xht(1/1)100.00%PASS
c5508-ipadn-b-002.xht(0/1)0.00%FAIL
c5508-ipadn-b-003.xht(1/1)100.00%PASS
c5509-ipadn-l-000.xht(0/1)0.00%FAIL
c5509-ipadn-l-001.xht(0/1)0.00%FAIL
c5509-ipadn-l-002.xht(0/1)0.00%FAIL
c5509-ipadn-l-003.xht(0/1)0.00%FAIL
c5509-ipadn-l-004.xht(0/1)0.00%FAIL
c5509-padn-l-000.xht(1/1)100.00%PASS
c5509-padn-l-001.xht(1/1)100.00%PASS
c5509-padn-l-002.xht(1/1)100.00%PASS
c5509-padn-l-003.xht(1/1)100.00%PASS
c5510-ipadn-000.xht(0/1)0.00%FAIL
c5510-padn-000.xht(0/1)0.00%FAIL
c5510-padn-001.xht(1/1)100.00%PASS
c5510-padn-002.xht(1/1)100.00%PASS
c5511-brdr-tw-001.xht(0/1)0.00%FAIL
c5511-brdr-tw-002.xht(1/1)100.00%PASS
c5511-brdr-tw-003.xht(1/1)100.00%PASS
c5511-ibrdr-tw-000.xht(1/1)100.00%PASS
c5512-brdr-rw-001.xht(1/1)100.00%PASS
c5512-brdr-rw-002.xht(1/1)100.00%PASS
c5512-brdr-rw-003.xht(1/1)100.00%PASS
c5512-ibrdr-rw-000.xht(1/1)100.00%PASS
c5513-brdr-bw-001.xht(0/1)0.00%FAIL
c5513-brdr-bw-002.xht(1/1)100.00%PASS
c5513-brdr-bw-003.xht(1/1)100.00%PASS
c5513-ibrdr-bw-000.xht(1/1)100.00%PASS
c5514-brdr-lw-001.xht(1/1)100.00%PASS
c5514-brdr-lw-002.xht(1/1)100.00%PASS
c5514-brdr-lw-003.xht(1/1)100.00%PASS
c5514-ibrdr-lw-000.xht(1/1)100.00%PASS
c5515-brdr-w-001.xht(0/1)0.00%FAIL
c5515-brdr-w-002.xht(1/1)100.00%PASS
c5515-ibrdr-000.xht(1/1)100.00%PASS
c5516-brdr-c-000.xht(1/1)100.00%PASS
c5516-ibrdr-c-000.xht(1/1)100.00%PASS
c5522-brdr-001.xht(1/1)100.00%PASS
c5525-fltblck-000.xht(1/1)100.00%PASS
c5525-fltinln-000.xht(1/1)100.00%PASS
c5525-fltmrgn-000.xht(0/1)0.00%FAIL
c5525-fltmult-000.xht(0/1)0.00%FAIL
c5525-fltwidth-001.xht(0/1)0.00%FAIL
c5525-fltwidth-003.xht(0/1)0.00%FAIL
c5526-fltclr-000.xht(0/1)0.00%FAIL
c561-list-displ-000.xht(0/1)0.00%FAIL
c562-white-sp-000.xht(0/1)0.00%FAIL
c563-list-type-000.xht(0/1)0.00%FAIL
c61-ex-len-000.xht(1/1)100.00%PASS
c61-rel-len-000.xht(0/1)0.00%FAIL
c62-percent-000.xht(1/1)100.00%PASS
c64-uri-000.xht(1/1)100.00%PASS
c71-fwd-parsing-000.xht(1/1)100.00%PASS
c71-fwd-parsing-001.xht(1/1)100.00%PASS
c71-fwd-parsing-002.xht(1/1)100.00%PASS
c71-fwd-parsing-003.xht(1/1)100.00%PASS
c71-fwd-parsing-004.xht(1/1)100.00%PASS