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 / selectors / invalidation

Spec: Selectors ↗

Runs: Chrome 155.0.8038.0 (wpt@7addae031, 2026-09-02) | Firefox 157.0a1 (wpt@7addae031, 2026-09-02) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7884 (wpt@b1a7025f8, 2026-09-02) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)

Sort areas: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	98.3%3002/3055	97.0%2962/3055	99.2%3031/3055	99.5%3039/3055	49.6%1514/3055	44.7%1367/3055
crashtests	100.0%2/2	100.0%2/2	100.0%2/2	100.0%2/2	100.0%2/2	100.0%2/2

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
any-link-attribute-removal.html	PASS	PASS	PASS	PASS	PASS	PASS
any-link-pseudo.html	PASS	PASS	PASS	PASS	PASS	FAIL
attribute-or-elemental-selectors-in-has.html	31/31	31/31	31/31	31/31	18/31	0/31
attribute.html	6/6	6/6	6/6	6/6	6/6	6/6
child-indexed-pseudo-classes-in-has.html	66/66	66/66	66/66	66/66	39/66	39/66
class-id-attr.html	PASS	PASS	PASS	PASS	PASS	PASS
defined-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
defined.html	PASS	PASS	PASS	PASS	PASS	FAIL
dir-pseudo-class-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
empty-pseudo-in-has-display-none.html	14/14	14/14	14/14	14/14	7/14	7/14
empty-pseudo-in-has.html	6/6	6/6	6/6	6/6	1/6	1/6
enabled-disabled.html	2/2	2/2	2/2	2/2	2/2	2/2
first-child-last-child.html	2/2	2/2	2/2	2/2	2/2	0/2
fullscreen-pseudo-class-in-has.html	2/2	2/2	2/2	2/2	0/2	0/2
has-append-first-node.html	PASS	PASS	PASS	PASS	FAIL	FAIL
has-complexity.html	7/7	7/7	7/7	7/7	1/7	1/7
has-css-nesting-shared.html	12/12	12/12	12/12	12/12	6/12	6/12
has-in-adjacent-position.html	295/295	295/295	295/295	295/295	193/295	193/295
has-in-ancestor-position.html	337/337	337/337	337/337	337/337	210/337	210/337
has-in-is-non-subject-compound.html	3/3	3/3	3/3	3/3	2/3	2/3
has-in-parent-position.html	211/211	211/211	211/211	211/211	152/211	152/211
has-in-sibling-position.html	295/295	295/295	295/295	295/295	181/295	181/295
has-invalidation-after-removing-non-first-element.html	2/2	2/2	2/2	2/2	1/2	1/2
has-invalidation-first-in-sibling-chain.html	12/12	12/12	8/12	12/12	8/12	8/12
has-invalidation-for-wiping-an-element.html	5/5	5/5	5/5	5/5	3/5	0/5
has-nested-pseudo-001-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
has-nested-pseudo-002-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
has-nested-pseudo-003-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
has-pseudo-element-subject-child-mutation.html	4/4	4/4	4/4	4/4	1/4	0/4
has-pseudo-element.html	PASS	PASS	PASS	PASS	FAIL	FAIL
has-pseudoclass-only.html	36/36	36/36	36/36	36/36	24/36	24/36
has-sibling-insertion-removal.html	28/28	28/28	28/28	28/28	14/28	14/28
has-sibling.html	71/71	71/71	71/71	71/71	36/71	36/71
has-side-effect.html	3/3	3/3	3/3	3/3	2/3	2/3
has-unstyled.html	9/9	9/9	9/9	9/9	5/9	5/9
has-with-is-child-combinator.html	10/10	10/10	10/10	10/10	7/10	7/10
has-with-nesting-parent-containing-complex.html	37/37	37/37	37/37	37/37	19/37	19/37
has-with-nesting-parent-containing-hover.html	PASS	PASS	PASS	PASS	FAIL	SKIP
has-with-not.html	21/21	21/21	21/21	21/21	11/21	11/21
has-with-nth-child-sibling-remove.html	PASS	PASS	PASS	PASS	FAIL	FAIL
has-with-nth-child.html	5/5	5/5	1/5	5/5	4/5	4/5
has-with-pseudo-class.html	41/41	41/41	41/41	41/41	0/41	0/41
heading-pseudo-class-in-has-with-headingoffset.html	33/56	33/56	56/56	56/56	33/56	33/56
heading-pseudo-class-in-has-with-slot-reassignment.html	26/39	26/39	39/39	39/39	26/39	0/39
heading-pseudo-class-in-has.html	55/72	55/72	72/72	72/72	55/72	0/72
host-context-pseudo-class-in-has.html	6/6	4/6	4/6	4/6	4/6	0/6
host-has-shadow-tree-element-at-nonsubject-position.html	26/26	10/26	25/26	25/26	10/26	0/26
host-has-shadow-tree-element-at-subject-position.html	26/26	10/26	25/26	25/26	10/26	0/26
host-pseudo-class-in-has.html	4/4	4/4	4/4	4/4	2/4	0/4
input-in-range-in-has-with-readonly.html	4/4	4/4	4/4	0/4	0/4	0/4
input-pseudo-classes-in-has.html	10/10	10/10	10/10	9/10	0/10	0/10
insert-sibling-001.html	PASS	PASS	PASS	PASS	PASS	FAIL
insert-sibling-002.html	PASS	PASS	PASS	PASS	FAIL	FAIL
insert-sibling-003.html	PASS	PASS	PASS	PASS	FAIL	FAIL
insert-sibling-004.html	PASS	PASS	PASS	PASS	FAIL	FAIL
is-pseudo-containing-complex-in-has.html	476/476	476/476	476/476	476/476	140/476	140/476
is-pseudo-containing-sibling-relationship-in-has.html	21/21	21/21	12/21	21/21	20/21	20/21
is-where-pseudo-containing-hard-pseudo-and-never-matching.html	12/12	12/12	12/12	12/12	8/12	8/12
is-where-pseudo-containing-hard-pseudo.html	20/20	20/20	20/20	20/20	20/20	20/20
is.html	7/7	7/7	7/7	7/7	7/7	7/7
lang-pseudo-class-in-has-document-element.html	PASS	PASS	PASS	PASS	FAIL	FAIL
lang-pseudo-class-in-has-multiple-document-elements.html	PASS	PASS	PASS	PASS	TIMEOUT	FAIL
lang-pseudo-class-in-has-xhtml.xhtml	PASS	PASS	PASS	PASS	FAIL	FAIL
lang-pseudo-class-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
link-pseudo-class-in-has.html	2/2	2/2	2/2	2/2	0/2	0/2
link-pseudo-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
location-pseudo-classes-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
media-loading-pseudo-classes-in-has.sub.html	2/2	2/2	2/2	0/2	0/2	0/2
media-pseudo-classes-in-has.html	3/3	3/3	3/3	3/3	0/3	0/3
modal-pseudo-class-in-has.html	5/5	5/5	5/5	3/5	1/5	0/5
negated-always-matches-negated-first-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-always-matches-negated-last-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-first-of-type-in-nonsubject-position.html	PASS	PASS	PASS	PASS	PASS	PASS
negated-has-in-nonsubject-position.html	PASS	PASS	PASS	PASS	PASS	PASS
negated-is-always-matches-negated-first-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	PASS
negated-is-always-matches-negated-last-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	PASS
negated-is-never-matches-negated-first-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-is-never-matches-negated-last-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-last-of-type-invalidation.html	PASS	PASS	PASS	PASS	PASS	PASS
negated-negated-first-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-negated-last-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-never-matches-negated-first-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-never-matches-negated-last-of-type-when-ancestor-changes.html	PASS	PASS	PASS	PASS	PASS	FAIL
negated-nth-child-when-ancestor-changes.html	PASS	PASS	PASS	PASS	FAIL	FAIL
negated-nth-last-child-when-ancestor-changes.html	PASS	PASS	PASS	PASS	FAIL	FAIL
not-001.html	2/2	2/2	2/2	2/2	2/2	2/2
not-002.html	6/6	6/6	6/6	6/6	6/6	6/6
not-pseudo-containing-complex-in-has.html	460/460	460/460	460/460	460/460	115/460	115/460
not-pseudo-containing-sibling-relationship-in-has.html	3/3	3/3	1/3	3/3	2/3	2/3
nth-child-containing-ancestor.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-in-shadow-root.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-attr-largedom.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-attr.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-class-prefix.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-class.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-id-prefix.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-ids.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-in-ancestor.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-in-is.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-in-shadow-root.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-is.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-pseudo-class.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-of-sibling.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-when-ancestor-changes.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-when-sibling-changes.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-child-whole-subtree.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-containing-ancestor.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-in-shadow-root.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-attr.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-class-prefix.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-class.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-id-prefix.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-ids.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-in-ancestor.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-in-is.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-in-shadow-root.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-is.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-pseudo-class.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-of-sibling.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-when-ancestor-changes.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-last-child-when-sibling-changes.html	PASS	PASS	PASS	PASS	FAIL	FAIL
nth-of-namespace-class-invalidation-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
open-pseudo-class-in-has.html	9/9	9/9	8/9	9/9	0/9	0/9
option-disabled-when-ancestor-changes.html	4/4	0/4	4/4	2/4	0/4	0/4
part-dir.html	2/2	2/2	2/2	2/2	0/2	0/2
part-lang.html	2/2	0/2	2/2	2/2	0/2	0/2
part-pseudo.html	PASS	PASS	PASS	PASS	PASS	FAIL
placeholder-shown.html	4/4	4/4	4/4	4/4	3/4	2/4
quirks-mode-stylesheet-dynamic-add-001.html	PASS	PASS	PASS	PASS	PASS	FAIL
selectorText-dynamic-001.html	PASS	PASS	PASS	PASS	PASS	FAIL
sheet-going-away-001.html	PASS	PASS	PASS	PASS	PASS	PASS
sheet-going-away-002.html	PASS	PASS	PASS	PASS	PASS	PASS
sibling.html	7/7	7/7	7/7	7/7	7/7	7/7
state-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
subject-has-invalidation-with-display-none-anchor-element.html	PASS	PASS	PASS	PASS	FAIL	FAIL
target-pseudo-in-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
typed-child-indexed-pseudo-classes-in-has.html	102/102	102/102	102/102	102/102	54/102	54/102
user-action-pseudo-classes-in-has.html	PASS	PASS	PASS	FAIL	FAIL	SKIP
user-valid-user-invalid.html	PASS	PASS	PASS	PASS	FAIL	SKIP
where.html	5/5	5/5	5/5	5/5	5/5	5/5