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 / css-ruby

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total33.10%(51/154)33.12%(51/154)33.12%
break-within-bases25.00%(1/4)25.00%(1/4)25.00%
crashtests100.00%(6/6)100.00%(6/6)100.00%
TestSubtestsSubtest %Status
abs-in-ruby-base-container.html(1/1)100.00%PASS
abs-in-ruby-base.html(1/1)100.00%PASS
abs-in-ruby-container.html(1/1)100.00%PASS
block-ruby-001.html(0/1)0.00%FAIL
block-ruby-002.html(0/1)0.00%FAIL
block-ruby-003.html(0/1)0.00%FAIL
block-ruby-004.html(0/1)0.00%FAIL
block-ruby-005.html(0/1)0.00%FAIL
br-clear-all-000.html(1/1)100.00%PASS
br-clear-all-001.html(0/1)0.00%FAIL
br-clear-all-002.html(0/1)0.00%FAIL
collapse-trailing-whitespace.html(0/1)0.00%FAIL
empty-ruby-base-container.html(1/1)100.00%PASS
empty-ruby-text-container-abs.html(1/1)100.00%PASS
empty-ruby-text-container-float.html(1/1)100.00%PASS
empty-ruby-text-container.html(1/1)100.00%PASS
improperly-contained-annotation-001.html(1/1)100.00%PASS
intra-base-white-space-001.html(0/1)0.00%FAIL
nested-ruby-pairing-001.html(0/1)0.00%FAIL
pseudo-first-letter.html(0/1)0.00%FAIL
pseudo-first-line.html(0/1)0.00%FAIL
rb-display-001.html(0/1)0.00%FAIL
rbc-rtc-basic-001.html(0/1)0.00%FAIL
root-block-ruby.xhtml(0/1)0.00%FAIL
root-ruby.xhtml(0/1)0.00%FAIL
rt-display-001.html(0/1)0.00%FAIL
rt-text-indent-001.html(0/1)0.00%FAIL
ruby-align-001.html(0/1)0.00%FAIL
ruby-align-001a.html(0/1)0.00%FAIL
ruby-align-002.html(0/1)0.00%FAIL
ruby-align-002a.html(0/1)0.00%FAIL
ruby-align-space-around.html(0/1)0.00%FAIL
ruby-annotation-pairing-001.html(0/1)0.00%FAIL
ruby-annotation-with-margin.html(0/1)0.00%FAIL
ruby-autohide-001.html(0/1)0.00%FAIL
ruby-autohide-002.html(0/1)0.00%FAIL
ruby-autohide-003.html(0/1)0.00%FAIL
ruby-autohide-004.html(0/1)0.00%FAIL
ruby-base-container-abs.html(1/1)100.00%PASS
ruby-base-container-float.html(1/1)100.00%PASS
ruby-base-different-size.html(1/1)100.00%PASS
ruby-bidi-001.html(0/1)0.00%FAIL
ruby-bidi-002.html(0/1)0.00%FAIL
ruby-bidi-003.html(0/1)0.00%FAIL
ruby-bidi-004.html(1/1)100.00%PASS
ruby-box-generation-001.html(0/1)0.00%FAIL
ruby-box-generation-002.html(0/1)0.00%FAIL
ruby-box-generation-003.html(0/1)0.00%FAIL
ruby-box-generation-004.html(0/1)0.00%FAIL
ruby-box-generation-005.html(0/1)0.00%FAIL
ruby-box-model-001.html(1/1)100.00%PASS
ruby-dynamic-insertion-001.html(1/1)100.00%PASS
ruby-dynamic-insertion-002.html(1/1)100.00%PASS
ruby-dynamic-insertion-003.html(0/1)0.00%FAIL
ruby-dynamic-insertion-004.html(1/1)100.00%PASS
ruby-dynamic-insertion-005.html(0/1)0.00%FAIL
ruby-dynamic-removal-001.html(0/1)0.00%FAIL
ruby-dynamic-removal-002.html(0/1)0.00%FAIL
ruby-dynamic-removal-003.html(0/1)0.00%FAIL
ruby-float-handling-001.html(1/1)100.00%PASS
ruby-inlinize-blocks-001.html(0/1)0.00%FAIL
ruby-inlinize-blocks-002.html(0/1)0.00%FAIL
ruby-inlinize-blocks-003.html(0/1)0.00%FAIL
ruby-inlinize-blocks-004.html(0/1)0.00%FAIL
ruby-inlinize-blocks-005.html(1/1)100.00%PASS
ruby-inlinize-fieldset-crash.html(1/1)100.00%PASS
ruby-inlinize-recursive-simple.html(0/1)0.00%FAIL
ruby-intra-level-whitespace-001.html(0/1)0.00%FAIL
ruby-intra-level-whitespace-002.html(1/1)100.00%PASS
ruby-intra-level-whitespace-003.html(0/1)0.00%FAIL
ruby-intrinsic-isize-001.html(1/1)100.00%PASS
ruby-intrinsic-isize-002.html(1/1)100.00%PASS
ruby-intrinsic-isize-003.html(1/1)100.00%PASS
ruby-justification-001.html(1/1)100.00%PASS
ruby-justification-002.html(0/1)0.00%FAIL
ruby-lang-specific-style-001.html(0/1)0.00%FAIL
ruby-layout-internal-boxes.html(0/1)0.00%CRASH
ruby-line-break-suppression-001.html(0/1)0.00%FAIL
ruby-line-break-suppression-002.html(0/1)0.00%FAIL
ruby-line-break-suppression-003.html(0/1)0.00%FAIL
ruby-line-break-suppression-004.html(0/1)0.00%FAIL
ruby-line-break-suppression-005.html(1/1)100.00%PASS
ruby-line-breaking-001.html(1/1)100.00%PASS
ruby-line-breaking-002.html(0/1)0.00%FAIL
ruby-line-breaking-003.html(0/1)0.00%FAIL
ruby-no-transform.html(1/1)100.00%PASS
ruby-overhang-dynamic.html(0/1)0.00%FAIL
ruby-overhang-none.html(0/1)0.00%FAIL
ruby-overhang-spaces-001.html(0/1)0.00%FAIL
ruby-overhang-spaces-002.html(0/1)0.00%FAIL
ruby-overhang-spaces-003.html(0/1)0.00%FAIL
ruby-overhang-spaces-004.html(0/1)0.00%FAIL
ruby-overhang-spaces-005.html(0/1)0.00%FAIL
ruby-overhang-spaces-006.html(0/1)0.00%FAIL
ruby-overhang-spaces-007.html(0/1)0.00%FAIL
ruby-overhang-spaces-008.html(0/1)0.00%FAIL
ruby-overhang-spaces-009.html(0/1)0.00%FAIL
ruby-overhang-spaces-010.html(0/1)0.00%FAIL
ruby-overhang-spaces-011.html(0/1)0.00%FAIL
ruby-overhang-spaces-012.html(0/1)0.00%FAIL
ruby-overhang-spaces-013.html(0/1)0.00%FAIL
ruby-overhang-spaces-014.html(0/1)0.00%FAIL
ruby-overhang-spaces-015.html(0/1)0.00%FAIL
ruby-overhang-spaces-016.html(0/1)0.00%FAIL
ruby-overhang-spaces-017.html(0/1)0.00%FAIL
ruby-overhang-spaces-018.html(0/1)0.00%FAIL
ruby-overhang-spaces-019.html(0/1)0.00%FAIL
ruby-overhang-spaces-020.html(0/1)0.00%FAIL
ruby-overhang-spaces-021.html(0/1)0.00%FAIL
ruby-overhang-spaces-022.html(1/1)100.00%PASS
ruby-overhang-spaces-align-001.html(0/1)0.00%FAIL
ruby-overhang-spaces-align-002.html(0/1)0.00%FAIL
ruby-overhang-spaces-align-003.html(0/1)0.00%FAIL
ruby-overhang-spaces-align-004.html(0/1)0.00%FAIL
ruby-overhang-spaces-align-005.html(0/1)0.00%FAIL
ruby-overhang-spaces-crash.html(1/1)100.00%PASS
ruby-overhang-spaces-non-bmp-001.html(0/1)0.00%FAIL
ruby-overhang-spaces-non-bmp-002.html(0/1)0.00%FAIL
ruby-overhang-spaces-text-spacing-trim-001.html(0/1)0.00%FAIL
ruby-overhang-spaces-text-spacing-trim-002.html(0/1)0.00%FAIL
ruby-overhang-spaces-vertical-001.html(0/1)0.00%FAIL
ruby-overhang-spaces-vertical-002.html(0/1)0.00%FAIL
ruby-overhang-spaces-vertical-003.html(0/1)0.00%FAIL
ruby-overhang-spaces-vertical-004.html(0/1)0.00%FAIL
ruby-overhang-spaces-vertical-005.html(0/1)0.00%FAIL
ruby-overhang-spaces-vertical-006.html(0/1)0.00%FAIL
ruby-reflow-001-transparentruby.html(1/1)100.00%PASS
ruby-span-001.html(1/1)100.00%PASS
ruby-tab-in-base-001.html(1/1)100.00%PASS
ruby-tab-in-base-002.html(0/1)0.00%FAIL
ruby-tab-in-base-003.html(1/1)100.00%PASS
ruby-tab-in-base-max-content-crash.html(1/1)100.00%PASS
ruby-text-collapse.html(0/1)0.00%FAIL
ruby-text-combine-upright-001a.html(1/1)100.00%PASS
ruby-text-combine-upright-001b.html(1/1)100.00%PASS
ruby-text-combine-upright-002a.html(1/1)100.00%PASS
ruby-text-combine-upright-002b.html(1/1)100.00%PASS
ruby-text-dynamic-style.html(0/1)0.00%FAIL
ruby-whitespace-001.html(0/1)0.00%FAIL
ruby-whitespace-002.html(1/1)100.00%PASS
ruby-with-floats-001.html(1/1)100.00%PASS
ruby-with-floats-002.html(1/1)100.00%PASS
ruby-with-floats-003.html(1/1)100.00%PASS
whitespace-ruby-beside-float.html(1/1)100.00%PASS