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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.

wpt / css / css-grid / subgrid

Score history
1 month3 months6 months1 year2 years4 yearsAll time
0%20%40%60%80%100%May 2025Jul 2025Sep 2025Nov 2025Jan 2026Mar 2026May 2026Jul 2026Sep 2026css/css-grid/subgrid

Data from commit:
ab0e30b Give form controls a UA default font-family (#940) (2026-09-25)

AreaInterop ScoreTestsTest %SubtestsSubtest %
Total41.98%(55/134)41.04%(102/362)28.18%
crashtests100.00%(11/11)100.00%(11/11)100.00%
TestSubtestsSubtest %Status
abs-pos-001.html(0/1)0.00%FAIL
abs-pos-002.html(0/1)0.00%FAIL
align-self-baseline-with-subgrid-mbp.html(1/2)50.00%FAIL
alignment-in-subgridded-axes-001.html(0/16)0.00%FAIL
alignment-in-subgridded-axes-002.html(1/1)100.00%PASS
auto-track-sizing-001.html(1/1)100.00%PASS
auto-track-sizing-002.html(1/1)100.00%PASS
auto-track-sizing-003.html(1/1)100.00%PASS
auto-track-sizing-004.html(0/1)0.00%FAIL
baseline-001.html(0/1)0.00%FAIL
contribution-size-flex-tracks-001.html(0/1)0.00%FAIL
dynamic-min-content-001.html(1/1)100.00%PASS
dynamic-min-content-002.html(1/1)100.00%PASS
dynamic-min-content-003.html(1/1)100.00%PASS
dynamic-subgridded-item-height.html(1/1)100.00%PASS
grid-gap-001.html(0/1)0.00%FAIL
grid-gap-002.html(0/1)0.00%FAIL
grid-gap-003.html(0/1)0.00%FAIL
grid-gap-004.html(0/1)0.00%FAIL
grid-gap-005.html(0/1)0.00%FAIL
grid-gap-006.html(0/1)0.00%FAIL
grid-gap-007.html(0/1)0.00%FAIL
grid-gap-008.html(0/1)0.00%FAIL
grid-gap-009.html(0/1)0.00%FAIL
grid-gap-010.html(0/1)0.00%FAIL
grid-gap-011.html(0/1)0.00%FAIL
grid-gap-012.html(0/1)0.00%FAIL
grid-gap-larger-001.html(0/1)0.00%FAIL
grid-gap-larger-002.html(0/1)0.00%FAIL
grid-gap-normal-001.html(0/1)0.00%FAIL
grid-gap-smaller-001.html(0/1)0.00%FAIL
grid-template-computed-invalid-subgrid.html(0/14)0.00%FAIL
grid-template-computed-nogrid.html(0/50)0.00%FAIL
grid-template-invalid.html(22/22)100.00%PASS
grid-template-valid.html(0/38)0.00%FAIL
independent-formatting-context-fieldset.html(0/1)0.00%FAIL
independent-formatting-context.html(0/1)0.00%FAIL
independent-tracks-from-parent-grid.html(1/1)100.00%PASS
item-percentage-height-001.html(0/1)0.00%FAIL
line-names-001.html(0/1)0.00%FAIL
line-names-002.html(1/1)100.00%PASS
line-names-003.html(1/1)100.00%PASS
line-names-004.html(0/1)0.00%FAIL
line-names-005.html(0/1)0.00%FAIL
line-names-006.html(0/1)0.00%FAIL
line-names-007.html(0/1)0.00%FAIL
line-names-008.html(0/1)0.00%FAIL
line-names-009.html(0/1)0.00%FAIL
line-names-010.html(0/1)0.00%FAIL
line-names-011.html(0/1)0.00%FAIL
line-names-012.html(0/1)0.00%FAIL
line-names-013.html(1/1)100.00%PASS
line-names-014.html(1/1)100.00%PASS
line-names-015.html(1/1)100.00%PASS
line-names-parent-auto-repeat-001.html(1/1)100.00%PASS
orthogonal-writing-mode-001.html(0/1)0.00%FAIL
orthogonal-writing-mode-002.html(0/1)0.00%FAIL
orthogonal-writing-mode-003.html(0/1)0.00%FAIL
orthogonal-writing-mode-004.html(0/1)0.00%FAIL
orthogonal-writing-mode-005.html(1/1)100.00%PASS
orthogonal-writing-mode-006.html(1/1)100.00%PASS
overflow-hidden-does-not-prohibit-subgrid.html(0/1)0.00%FAIL
parent-repeat-auto-fit-001.html(1/1)100.00%PASS
parent-repeat-auto-fit-002.html(1/1)100.00%PASS
percentage-track-sizing.html(1/1)100.00%PASS
placement-implicit-001.html(0/1)0.00%FAIL
placement-invalidation-001.html(0/1)0.00%FAIL
repeat-auto-fill-001.html(0/1)0.00%FAIL
repeat-auto-fill-002.html(0/1)0.00%FAIL
repeat-auto-fill-003.html(0/1)0.00%FAIL
repeat-auto-fill-004.html(0/1)0.00%FAIL
repeat-auto-fill-005.html(0/1)0.00%FAIL
repeat-auto-fill-006.html(0/1)0.00%FAIL
repeat-auto-fill-007.html(1/1)100.00%PASS
repeat-auto-fill-008.html(0/1)0.00%FAIL
scrollbar-gutter-001.html(1/1)100.00%PASS
scrollbar-gutter-002.html(1/1)100.00%PASS
sibling-nested-subgrids-overflow-hidden-contribution.html(1/1)100.00%PASS
standalone-axis-size-001.html(1/1)100.00%PASS
standalone-axis-size-002.html(1/1)100.00%PASS
standalone-axis-size-003.html(1/1)100.00%PASS
standalone-axis-size-004.html(1/1)100.00%PASS
standalone-axis-size-005.html(1/1)100.00%PASS
standalone-axis-size-006.html(0/1)0.00%FAIL
standalone-axis-size-007.html(0/1)0.00%FAIL
standalone-axis-size-008.html(1/1)100.00%PASS
standalone-axis-size-009.html(1/1)100.00%PASS
standalone-axis-size-010.html(0/1)0.00%FAIL
standalone-axis-size-011.html(0/1)0.00%FAIL
standalone-axis-size-012.html(0/1)0.00%FAIL
standalone-axis-size-013.html(0/1)0.00%FAIL
sticky-subgrid-item.html(1/1)100.00%PASS
subgrid-baseline-001.html(0/1)0.00%FAIL
subgrid-baseline-002.html(0/1)0.00%FAIL
subgrid-baseline-003.html(0/1)0.00%FAIL
subgrid-baseline-004.html(0/1)0.00%FAIL
subgrid-baseline-005.html(2/12)16.67%FAIL
subgrid-baseline-006.html(0/12)0.00%FAIL
subgrid-baseline-007.html(1/12)8.33%FAIL
subgrid-baseline-008.html(0/12)0.00%FAIL
subgrid-baseline-009.html(0/12)0.00%FAIL
subgrid-baseline-010.html(0/2)0.00%FAIL
subgrid-baseline-011.html(1/2)50.00%FAIL
subgrid-baseline-012.html(1/1)100.00%PASS
subgrid-baseline-013.html(4/4)100.00%PASS
subgrid-baseline-014.html(5/5)100.00%PASS
subgrid-baseline-015.html(5/5)100.00%PASS
subgrid-baseline-016.html(6/6)100.00%PASS
subgrid-baseline-017.html(0/8)0.00%FAIL
subgrid-baseline-018.html(6/6)100.00%PASS
subgrid-button.html(0/1)0.00%FAIL
subgrid-item-block-size-001.html(0/1)0.00%FAIL
subgrid-item-with-margin-left-auto.html(0/1)0.00%FAIL
subgrid-no-items-on-edges-001.html(1/1)100.00%PASS
subgrid-no-items-on-edges-002.html(0/1)0.00%FAIL
subgrid-own-column-gap-does-not-inflate-intrinsic-width.html(1/1)100.00%PASS
subgrid-paint-containment-change-crash.html(1/1)100.00%PASS
subgrid-scroller-auto-height-padding.html(1/1)100.00%PASS
subgrid-stretch.html(0/1)0.00%FAIL
subgridded-axis-content-distribution-001.html(0/8)0.00%FAIL
writing-directions-001.html(0/1)0.00%FAIL
writing-directions-002.html(1/1)100.00%PASS
writing-directions-003.html(0/1)0.00%FAIL