Status

This page documents the implementation status of various HTML and CSS features in Blitz.

This page documents Blitz's scores on the "css" subsuite of the Web Platform Tests.

Score history

Data from commit:
21edc92 Skip the per-line item walk when an inline layout has no inline boxes (#1258) (2026-10-22)

Area	Interop Score	Tests	Test %	Subtests	Subtest %
Total	12.42%	(1/25)	3.99%	(14/129)	10.85%

Test	Subtests	Subtest %	Status
apply-nested-declarations.html	(1/2)	50.00%	FAIL
apply-top-level.html	(1/1)	100.00%	PASS
apply-within-mixin.html	(0/1)	0.00%	FAIL
contents-nested-declarations-fallback.html	(1/2)	50.00%	FAIL
contents-nested-declarations.html	(1/2)	50.00%	FAIL
contents-rule.html	(1/8)	12.50%	FAIL
important.html	(0/4)	0.00%	FAIL
mixin-basic.html	(0/1)	0.00%	FAIL
mixin-conditionals.html	(0/7)	0.00%	FAIL
mixin-cross-stylesheet.html	(0/1)	0.00%	FAIL
mixin-cssom.tentative.html	(1/8)	12.50%	FAIL
mixin-cycle.tentative.html	(0/1)	0.00%	FAIL
mixin-declarations.html	(0/1)	0.00%	FAIL
mixin-from-import-with-media-queries.html	(0/1)	0.00%	FAIL
mixin-from-import.html	(0/1)	0.00%	FAIL
mixin-invalidation.tentative.html	(0/3)	0.00%	FAIL
mixin-layers.html	(0/4)	0.00%	FAIL
mixin-locals.html	(0/8)	0.00%	FAIL
mixin-media-query-invalidation-2.html	(0/1)	0.00%	SKIP
mixin-media-query-invalidation.html	(0/1)	0.00%	SKIP
mixin-parameters.html	(7/24)	29.16%	FAIL
mixin-parsing.html	(0/29)	0.00%	FAIL
mixin-shadow-dom.html	(1/15)	6.66%	FAIL
mixin-shared-across-documents.html	(0/1)	0.00%	TIMEOUT
mixin-shared-sheet-no-mixins-in-scope.html	(0/2)	0.00%	FAIL