WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.

wpt / css / css-grid

Spec: CSS Grid Layout ↗

Runs: Chrome 158.0.8110.0 (wpt@23b0b89b1, 2026-10-18) | Firefox 160.0a1 (wpt@51af97519, 2026-10-17) | Safari 254 preview (wpt@d6658f1eb, 2026-10-17) | Ladybird 1.0-44fe0 (wpt@831ff48a8, 2026-10-18) | Servo Servo 0.7 (wpt@df642c414, 2026-10-17) | Blitz fb8d6c15e (wpt@cd1d8aa5b, 2026-10-17)

Score history

Percentage of subtests passing over time, one master run per day. Every engine's percentage is relative to the same denominator: the total number of subtests known to any engine in the latest runs (so lines are not distorted by tests being added to WPT, and an engine that skips tests is not flattered for it).

1 month 3 months 6 months 1 year 2 years 4 years All time

Sort: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	99.0%17432/17599	92.6%16314/17599	93.0%16379/17599	72.8%12826/17599	61.6%10857/17599	77.8%13698/17599
abspos	100.0%3666/3666	99.8%3662/3666	99.1%3635/3666	92.2%3381/3666	57.0%2090/3666	99.9%3663/3666
alignment	98.4%1927/1957	96.7%1894/1957	94.7%1854/1957	32.7%640/1957	46.7%914/1957	83.6%1638/1957
animation	100.0%2094/2094	100.0%2094/2094	100.0%2094/2094	100.0%2094/2094	74.8%1568/2094	74.8%1568/2094
grid-definition	94.6%1280/1352	94.4%1277/1352	94.2%1274/1352	85.7%1159/1352	91.0%1231/1352	93.6%1266/1352
grid-items	99.9%1169/1170	99.7%1167/1170	99.5%1165/1170	65.2%764/1170	66.1%774/1170	98.5%1153/1170
grid-lanes	98.2%3517/3579	74.3%2660/3579	77.4%2773/3579	46.2%1656/3579	35.9%1285/3579	36.0%1290/3579
grid-model	100.0%241/241	98.3%237/241	99.1%239/241	79.2%191/241	95.8%231/241	96.6%233/241
implicit-grids	100.0%59/59	100.0%59/59	100.0%59/59	79.6%47/59	100.0%59/59	100.0%59/59
layout-algorithm	100.0%926/926	98.5%913/926	98.0%908/926	70.6%654/926	63.6%589/926	72.3%670/926
parsing	100.0%1601/1601	91.8%1471/1601	91.3%1462/1601	95.8%1535/1601	91.4%1464/1601	91.5%1466/1601
placement	100.0%333/333	100.0%333/333	100.0%333/333	79.2%264/333	90.3%301/333	100.0%333/333
subgrid	99.4%365/367	80.9%297/367	92.9%341/367	56.9%209/367	29.7%109/367	31.3%115/367

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	100.0%254/254	98.4%250/254	95.2%242/254	91.3%232/254	95.2%242/254	96.0%244/254
anonymous-grid-items-001.html	PASS	PASS	PASS	PASS	PASS	PASS
anonymous-grid-items-002.html	PASS	PASS	FAIL	PASS	PASS	PASS
child-border-box-and-max-content-001.html	PASS	PASS	PASS	PASS	PASS	PASS
child-border-box-and-max-content-002.html	PASS	PASS	PASS	PASS	PASS	PASS
chrome-521184744-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
chrome-bug-001.html	PASS	PASS	PASS	PASS	PASS	PASS
chrome-crash-001.html	PASS	PASS	PASS	PASS	PASS	PASS
computed-grid-column.html	PASS	PASS	PASS	PASS	PASS	PASS
dynamic-grid-with-auto-fill.html	PASS	PASS	PASS	PASS	PASS	PASS
dynamic-grid-within-flexbox.html	PASS	PASS	PASS	PASS	PASS	PASS
empty-grid-within-flexbox.html	PASS	PASS	PASS	PASS	PASS	PASS
fieldset-first-line-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
firefox-bug-1881495.html	PASS	PASS	FAIL	PASS	FAIL	FAIL
firefox-bug-1958131-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
firefox-bug-2058181-crash.html	PASS	PASS	PASS	ERROR	PASS	PASS
firefox-bug-2063893-crash.html	PASS	PASS	PASS	ERROR	PASS	PASS
grid-calc-margin.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-child-percent-basis-resize-1.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-container-as-flex-item-001.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-container-as-flex-item-002.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-container-as-flex-item-003.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-container-baseline-synthesized-001.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-container-baseline-synthesized-002.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-container-baseline-synthesized-003.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-container-baseline-synthesized-004.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-extrinsically-sized-mutations.html	8/8	8/8	8/8	8/8	8/8	8/8
grid-flex-spanning-items-001.html	PASS	PASS	PASS	PASS	FAIL	FAIL
grid-flexible-track-fractional-flex-factor.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-flexible-track-free-space-distribution.html	PASS	FAIL	PASS	FAIL	PASS	PASS
grid-formatting-context-fallback-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-fragmentation-between-rows-001-print.tentative.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	PASS
grid-important.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-in-table-cell-with-img.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-item-non-auto-height-stretch-001.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-item-non-auto-height-stretch-002.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-item-non-auto-height-stretch-003.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-item-non-auto-height-stretch-004.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-item-percentage-quirk-001.html	PASS	PASS	PASS	PASS	FAIL	PASS
grid-item-percentage-quirk-002.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-layout-properties.html	140/140	137/140	137/140	136/140	136/140	140/140
grid-overflow-001.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
grid-overflowing-item-below-container-is-painted.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-overflowing-item-content-is-painted.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-overflowing-item-in-both-axes-is-painted.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-overflowing-item-in-nonstart-cell-is-painted.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-overflowing-item-right-of-container-is-painted.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-overflowing-multiple-items-are-painted.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-relayout-with-nested-grid.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-stale-layoutbox-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-table-cell-001-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-template-columns-mixed-calc.html	11/11	11/11	11/11	11/11	11/11	11/11
grid-tracks-fractional-fr.html	PASS	PASS	PASS	FAIL	PASS	PASS
grid-tracks-stretched-with-different-flex-factors-sum.html	2/2	2/2	2/2	1/2	2/2	2/2
grid-with-aspect-ratio-uses-content-box-height-for-track-sizing.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-with-content-dynamic-display-001.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-with-content-dynamic-display-002.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-with-dynamic-img.html	PASS	PASS	FAIL	PASS	PASS	FAIL
grid-with-orthogonal-child-within-flexbox.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
grid-within-flexbox-definite-change.html	PASS	PASS	PASS	PASS	PASS	PASS
grid-within-flexbox-indefinite.html	PASS	PASS	PASS	FAIL	PASS	PASS
img-src-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
inheritance.html	20/20	20/20	19/20	20/20	20/20	20/20
min-size-auto-overflow-clip.html	PASS	PASS	PASS	PASS	PASS	PASS
nested-grid-item-block-size-001.html	PASS	PASS	PASS	PASS	PASS	PASS
observer-chain-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
relative-grandchild.html	PASS	PASS	PASS	PASS	PASS	PASS
replaced-element-percentage-height-in-grid-nested-in-flex-001.html	PASS	PASS	PASS	PASS	PASS	PASS
replaced-element-percentage-height-in-grid-nested-in-flex-002.html	PASS	PASS	PASS	PASS	PASS	PASS
stretch-grid-item-button-overflow.html	PASS	PASS	PASS	PASS	PASS	PASS
stretch-grid-item-checkbox-input.html	PASS	PASS	FAIL	FAIL	PASS	FAIL
stretch-grid-item-radio-input.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
stretch-grid-item-text-input-overflow.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
table-grid-item-005.html	PASS	PASS	PASS	PASS	PASS	PASS
table-grid-item-dynamic-001.html	PASS	PASS	PASS	PASS	PASS	PASS
table-grid-item-dynamic-002.html	PASS	PASS	PASS	PASS	PASS	PASS
table-grid-item-dynamic-003.html	PASS	PASS	PASS	PASS	PASS	PASS
table-grid-item-dynamic-004.html	PASS	PASS	PASS	PASS	PASS	PASS
whitespace-reattach.html	PASS	PASS	PASS	PASS	PASS	FAIL