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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:
708eb61 WPT runner: support mismatch reftests and multiple rel=match links (#665) (2026-08-09)

wpt / css / css-grid / grid-items

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total73.30%(144/202)71.29%(261/918)28.43%
TestSubtestsSubtest %Status
anonymous-grid-item-001.html(1/1)100.00%PASS
anonymous-grid-item-002.html(0/1)0.00%FAIL
aspect-ratio-001.html(1/1)100.00%PASS
aspect-ratio-002.html(1/1)100.00%PASS
aspect-ratio-003.html(1/1)100.00%PASS
aspect-ratio-004.html(1/1)100.00%PASS
aspect-ratio-005.html(0/1)0.00%FAIL
explicitly-sized-grid-item-as-table.html(0/1)0.00%FAIL
grid-auto-margin-and-replaced-item-001.html(0/1)0.00%FAIL
grid-automatic-minimum-intrinsic-aspect-ratio-001.html(0/14)0.00%FAIL
grid-img-item-percent-max-height-001.html(0/1)0.00%FAIL
grid-inline-items-001.html(1/1)100.00%PASS
grid-inline-items-002.html(1/1)100.00%PASS
grid-inline-items-003.html(1/1)100.00%PASS
grid-inline-items-inline-blocks-001.html(1/1)100.00%PASS
grid-inline-order-property-auto-placement-001.html(1/1)100.00%PASS
grid-inline-order-property-auto-placement-002.html(1/1)100.00%PASS
grid-inline-order-property-auto-placement-003.html(1/1)100.00%PASS
grid-inline-order-property-auto-placement-004.html(1/1)100.00%PASS
grid-inline-order-property-auto-placement-005.html(1/1)100.00%PASS
grid-inline-order-property-painting-001.html(1/1)100.00%PASS
grid-inline-order-property-painting-002.html(1/1)100.00%PASS
grid-inline-order-property-painting-003.html(1/1)100.00%PASS
grid-inline-order-property-painting-004.html(1/1)100.00%PASS
grid-inline-order-property-painting-005.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-001.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-002.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-003.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-004.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-005.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-overlapped-items-001.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-overlapped-items-002.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-overlapped-items-003.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-overlapped-items-004.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-overlapped-items-005.html(1/1)100.00%PASS
grid-inline-z-axis-ordering-overlapped-items-006.html(1/1)100.00%PASS
grid-intrinsic-maximums.html(0/1)0.00%FAIL
grid-item-block-axis-content-contribution-001.html(1/1)100.00%PASS
grid-item-block-axis-content-contribution-002.html(1/1)100.00%PASS
grid-item-block-axis-content-contribution-003.html(1/1)100.00%PASS
grid-item-border-padding-001.html(1/1)100.00%PASS
grid-item-border-padding-002.html(1/1)100.00%PASS
grid-item-border-padding-003.html(1/1)100.00%PASS
grid-item-border-padding-004.html(1/1)100.00%PASS
grid-item-containing-block-001.html(1/1)100.00%PASS
grid-item-containing-block-002.html(1/1)100.00%PASS
grid-item-containing-block-003.html(1/1)100.00%PASS
grid-item-containing-block-004.html(1/1)100.00%PASS
grid-item-direction-rtl-001.html(1/1)100.00%PASS
grid-item-flex-container-001.html(0/9)0.00%FAIL
grid-item-inline-contribution-001.html(1/1)100.00%PASS
grid-item-inline-contribution-002.html(1/1)100.00%PASS
grid-item-inline-contribution-003.html(1/1)100.00%PASS
grid-item-inline-contribution-004.html(1/1)100.00%PASS
grid-item-inline-contribution-005.html(1/1)100.00%PASS
grid-item-margins-and-writing-modes-001.html(1/1)100.00%PASS
grid-item-min-contribution-behaves-as-auto-001.html(2/2)100.00%PASS
grid-item-min-contribution-fit-content-001.html(0/1)0.00%FAIL
grid-item-min-height-overrides-fixed-height-001.html(1/1)100.00%PASS
grid-item-min-width-overrides-fixed-width-001.html(1/1)100.00%PASS
grid-item-minimum-size-single-axis-scroll-container.html(2/4)50.00%FAIL
grid-item-minmax-img-001.html(0/1)0.00%FAIL
grid-item-minmax-img-002.html(0/1)0.00%FAIL
grid-item-overflow-auto-max-height-percentage.html(0/1)0.00%FAIL
grid-item-percentage-sizes-001.html(0/1)0.00%FAIL
grid-item-percentage-sizes-002.html(0/1)0.00%FAIL
grid-item-percentage-sizes-003.html(0/1)0.00%FAIL
grid-item-rel-pos-001.html(1/1)100.00%PASS
grid-item-rel-pos-002.html(1/1)100.00%PASS
grid-item-script-001.html(0/1)0.00%FAIL
grid-items-001.html(1/1)100.00%PASS
grid-items-002.html(1/1)100.00%PASS
grid-items-003.html(1/1)100.00%PASS
grid-items-contribution-negative-margins.html(1/1)100.00%PASS
grid-items-inline-blocks-001.html(1/1)100.00%PASS
grid-items-minimum-height-orthogonal-001.html(0/46)0.00%FAIL
grid-items-minimum-width-001.html(0/44)0.00%FAIL
grid-items-minimum-width-002.html(0/44)0.00%FAIL
grid-items-minimum-width-orthogonal-001.html(0/46)0.00%FAIL
grid-items-minimum-width-orthogonal-002.html(0/44)0.00%FAIL
grid-items-minimum-width-vertical-lr-001.html(0/44)0.00%FAIL
grid-items-minimum-width-vertical-lr-002.html(0/44)0.00%FAIL
grid-items-minimum-width-vertical-rl-001.html(0/44)0.00%FAIL
grid-items-minimum-width-vertical-rl-002.html(0/44)0.00%FAIL
grid-items-percentage-margins-001.html(8/8)100.00%PASS
grid-items-percentage-margins-002.html(8/8)100.00%PASS
grid-items-percentage-margins-003.html(1/1)100.00%PASS
grid-items-percentage-margins-004.html(1/1)100.00%PASS
grid-items-percentage-margins-005.html(1/1)100.00%PASS
grid-items-percentage-margins-006.html(1/1)100.00%PASS
grid-items-percentage-margins-007.html(1/1)100.00%PASS
grid-items-percentage-margins-008.html(1/1)100.00%PASS
grid-items-percentage-margins-009.html(1/1)100.00%PASS
grid-items-percentage-margins-010.html(1/1)100.00%PASS
grid-items-percentage-margins-011.html(1/1)100.00%PASS
grid-items-percentage-margins-012.html(1/1)100.00%PASS
grid-items-percentage-margins-013.html(1/1)100.00%PASS
grid-items-percentage-margins-014.html(1/1)100.00%PASS
grid-items-percentage-margins-vertical-lr-001.html(0/8)0.00%FAIL
grid-items-percentage-margins-vertical-lr-002.html(0/8)0.00%FAIL
grid-items-percentage-margins-vertical-rl-001.html(0/8)0.00%FAIL
grid-items-percentage-margins-vertical-rl-002.html(0/8)0.00%FAIL
grid-items-percentage-paddings-001.html(6/8)75.00%FAIL
grid-items-percentage-paddings-002.html(6/8)75.00%FAIL
grid-items-percentage-paddings-003.html(1/1)100.00%PASS
grid-items-percentage-paddings-004.html(1/1)100.00%PASS
grid-items-percentage-paddings-005.html(1/1)100.00%PASS
grid-items-percentage-paddings-006.html(1/1)100.00%PASS
grid-items-percentage-paddings-007.html(1/1)100.00%PASS
grid-items-percentage-paddings-008.html(1/1)100.00%PASS
grid-items-percentage-paddings-009.html(1/1)100.00%PASS
grid-items-percentage-paddings-010.html(1/1)100.00%PASS
grid-items-percentage-paddings-011.html(1/1)100.00%PASS
grid-items-percentage-paddings-012.html(1/1)100.00%PASS
grid-items-percentage-paddings-013.html(1/1)100.00%PASS
grid-items-percentage-paddings-014.html(1/1)100.00%PASS
grid-items-percentage-paddings-015.html(0/1)0.00%FAIL
grid-items-percentage-paddings-vertical-lr-001.html(0/8)0.00%FAIL
grid-items-percentage-paddings-vertical-lr-002.html(0/8)0.00%FAIL
grid-items-percentage-paddings-vertical-rl-001.html(0/8)0.00%FAIL
grid-items-percentage-paddings-vertical-rl-002.html(0/8)0.00%FAIL
grid-items-relative-offsets-001.html(2/6)33.33%FAIL
grid-items-relative-offsets-002.html(2/6)33.33%FAIL
grid-items-relative-positioned-containing-block-001.html(1/1)100.00%PASS
grid-items-relative-positioned-containing-block-002.html(1/1)100.00%PASS
grid-items-relative-positioned-containing-block-003.html(1/1)100.00%PASS
grid-items-relative-positioned-containing-block-004.html(1/1)100.00%PASS
grid-items-relative-positioned-containing-block-005.html(1/1)100.00%PASS
grid-items-relative-positioned-containing-block-006.html(1/1)100.00%PASS
grid-items-sizing-alignment-001.html(0/1)0.00%FAIL
grid-layout-grid-in-grid.html(1/1)100.00%PASS
grid-layout-z-order-a.html(0/1)0.00%FAIL
grid-layout-z-order-b.html(0/1)0.00%FAIL
grid-minimum-size-grid-items-001.html(1/1)100.00%PASS
grid-minimum-size-grid-items-002.html(1/1)100.00%PASS
grid-minimum-size-grid-items-003.html(1/1)100.00%PASS
grid-minimum-size-grid-items-004.html(1/1)100.00%PASS
grid-minimum-size-grid-items-005.html(1/1)100.00%PASS
grid-minimum-size-grid-items-006.html(1/1)100.00%PASS
grid-minimum-size-grid-items-007.html(1/1)100.00%PASS
grid-minimum-size-grid-items-008.html(1/1)100.00%PASS
grid-minimum-size-grid-items-009.html(1/1)100.00%PASS
grid-minimum-size-grid-items-010.html(1/1)100.00%PASS
grid-minimum-size-grid-items-011.html(1/1)100.00%PASS
grid-minimum-size-grid-items-012.html(1/1)100.00%PASS
grid-minimum-size-grid-items-013.html(1/1)100.00%PASS
grid-minimum-size-grid-items-014.html(1/1)100.00%PASS
grid-minimum-size-grid-items-015.html(1/1)100.00%PASS
grid-minimum-size-grid-items-016.html(1/1)100.00%PASS
grid-minimum-size-grid-items-017.html(1/1)100.00%PASS
grid-minimum-size-grid-items-018.html(1/1)100.00%PASS
grid-minimum-size-grid-items-019.html(1/1)100.00%PASS
grid-minimum-size-grid-items-020.html(1/1)100.00%PASS
grid-minimum-size-grid-items-022.html(24/45)53.33%FAIL
grid-minimum-size-grid-items-023.html(32/60)53.33%FAIL
grid-minimum-size-grid-items-024.html(10/45)22.22%FAIL
grid-minimum-size-grid-items-025.html(18/60)30.00%FAIL
grid-order-property-auto-placement-001.html(1/1)100.00%PASS
grid-order-property-auto-placement-002.html(1/1)100.00%PASS
grid-order-property-auto-placement-003.html(1/1)100.00%PASS
grid-order-property-auto-placement-004.html(1/1)100.00%PASS
grid-order-property-auto-placement-005.html(1/1)100.00%PASS
grid-order-property-painting-001.html(1/1)100.00%PASS
grid-order-property-painting-002.html(1/1)100.00%PASS
grid-order-property-painting-003.html(1/1)100.00%PASS
grid-order-property-painting-004.html(1/1)100.00%PASS
grid-order-property-painting-005.html(1/1)100.00%PASS
grid-size-with-orthogonal-child-001.html(0/1)0.00%FAIL
grid-size-with-orthogonal-child-002.html(0/1)0.00%FAIL
grid-size-with-orthogonal-child-dynamic.html(0/1)0.00%FAIL
grid-z-axis-ordering-001.html(1/1)100.00%PASS
grid-z-axis-ordering-002.html(1/1)100.00%PASS
grid-z-axis-ordering-003.html(1/1)100.00%PASS
grid-z-axis-ordering-004.html(1/1)100.00%PASS
grid-z-axis-ordering-005.html(1/1)100.00%PASS
grid-z-axis-ordering-overlapped-items-001.html(1/1)100.00%PASS
grid-z-axis-ordering-overlapped-items-002.html(1/1)100.00%PASS
grid-z-axis-ordering-overlapped-items-003.html(1/1)100.00%PASS
grid-z-axis-ordering-overlapped-items-004.html(1/1)100.00%PASS
grid-z-axis-ordering-overlapped-items-005.html(1/1)100.00%PASS
grid-z-axis-ordering-overlapped-items-006.html(1/1)100.00%PASS
item-with-table-with-infinite-max-intrinsic-width.html(1/1)100.00%PASS
overflow-hidden-min-content-contribution-in-abs-pos-grid-in-flexbox.html(1/1)100.00%PASS
percentage-margin-dynamic.html(0/1)0.00%FAIL
percentage-size-indefinite-replaced.html(1/1)100.00%PASS
percentage-size-replaced-subitems-001.html(1/1)100.00%PASS
percentage-size-subitems-001.html(1/1)100.00%PASS
percentage-size-subitems-002.html(1/1)100.00%PASS
remove-svg-grid-item-001.html(0/1)0.00%FAIL
replaced-element-001.html(0/1)0.00%FAIL
replaced-element-002.html(1/1)100.00%PASS
replaced-element-007.html(0/1)0.00%FAIL
replaced-element-010.html(0/1)0.00%FAIL
replaced-element-011.html(1/1)100.00%PASS
replaced-element-012.html(1/1)100.00%PASS
replaced-element-013.html(1/1)100.00%PASS
replaced-element-014.html(0/1)0.00%FAIL
replaced-element-015.html(0/1)0.00%FAIL
replaced-element-016.tentative.html(0/1)0.00%FAIL
replaced-element-017.tentative.html(0/1)0.00%FAIL
table-with-infinite-max-intrinsic-width.html(1/1)100.00%PASS
whitespace-in-grid-item-001.html(1/1)100.00%PASS