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-position

Spec: CSS Positioned Layout ↗

Runs: Chrome 155.0.8039.0 (wpt@508cc6a62, 2026-09-03) | Firefox 157.0a1 (wpt@508cc6a62, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@8fdda8ce4, 2026-09-03) | 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	NO DATA	NO DATA	88.1%1550/1759	80.2%1411/1759	70.2%1234/1759	53.6%943/1759
animations	NO DATA	NO DATA	100.0%883/883	100.0%883/883	72.8%643/883	62.7%554/883
crashtests	NO DATA	NO DATA	100.0%11/11	100.0%11/11	100.0%11/11	100.0%11/11
multicol	NO DATA	NO DATA	37.5%6/16	0.0%0/16	0.0%0/16	0.0%0/16
overlay	NO DATA	NO DATA	11.2%14/125	11.2%14/125	9.6%12/125	11.2%14/125
parsing	NO DATA	NO DATA	100.0%166/166	100.0%166/166	100.0%166/166	100.0%166/166
static-position	NO DATA	NO DATA	75.0%27/36	44.4%16/36	38.9%14/36	11.1%4/36
sticky	NO DATA	NO DATA	92.1%152/165	53.3%88/165	73.9%122/165	27.3%45/165

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
absolute-pos-box-inside-fixed-pos-box-with-changing-height.html	PASS	PASS	PASS	PASS	PASS	FAIL
backdrop-inherit-computed.html	4/4	4/4	4/4	4/4	0/4	0/4
backdrop-inherit-rendered.html	PASS	PASS	PASS	PASS	PASS	PASS
backdrop-tree-abiding-slotted.html	PASS	FAIL	PASS	FAIL	FAIL	FAIL
backdrop-ua-style.html	FAIL	PASS	PASS	PASS	FAIL	FAIL
block-axis-constraint-changes-for-out-of-flow-box.html	PASS	PASS	PASS	PASS	PASS	PASS
change-insets-inside-strict-containment-nested.html	PASS	PASS	PASS	PASS	FAIL	PASS
containing-block-change-button.html	PASS	PASS	PASS	PASS	PASS	FAIL
containing-block-change-scrollframe.html	PASS	PASS	PASS	PASS	PASS	PASS
fixed-z-index-blend.html	PASS	PASS	PASS	PASS	PASS	PASS
hypothetical-box-scroll-parent.html	PASS	PASS	FAIL	PASS	PASS	FAIL
hypothetical-box-scroll-viewport.html	PASS	PASS	PASS	PASS	PASS	PASS
hypothetical-dynamic-change-001.html	PASS	PASS	PASS	PASS	PASS	PASS
hypothetical-dynamic-change-002.html	PASS	PASS	PASS	PASS	PASS	PASS
hypothetical-dynamic-change-003.html	PASS	PASS	PASS	FAIL	PASS	FAIL
inheritance.html	12/12	12/12	12/12	12/12	12/12	12/12
invalidate-opacity-negative-z-index.html	PASS	PASS	PASS	PASS	PASS	FAIL
nested-inline-abspos-child-with-siblings.html	PASS	PASS	PASS	PASS	PASS	PASS
nested-inline-abspos-child.html	PASS	PASS	PASS	PASS	PASS	PASS
nested-positions-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-abspos-table-dynamic.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-center-001.html	PASS	FAIL	FAIL	FAIL	FAIL	FAIL
position-absolute-center-002.html	PASS	FAIL	FAIL	FAIL	FAIL	FAIL
position-absolute-center-003.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-center-004.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-center-006.html	PASS	PASS	FAIL	PASS	PASS	FAIL
position-absolute-center-007.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-chrome-bug-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-chrome-bug-002.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-container-dynamic-002.html	PASS	PASS	FAIL	PASS	PASS	PASS
position-absolute-container-dynamic.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-002.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-003.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-004.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-005.html	PASS	PASS	PASS	PASS	PASS	SKIP
position-absolute-crash-chrome-006.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-007.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-008.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-009.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-010.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-011.html	2/2	2/2	2/2	2/2	2/2	2/2
position-absolute-crash-chrome-012.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-crash-chrome-013.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-auto-overflow.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-containing-block.html	8/8	8/8	8/8	6/8	8/8	0/8
position-absolute-dynamic-list-marker.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-margin-auto-001.html	2/2	2/2	2/2	2/2	2/2	2/2
position-absolute-dynamic-overflow-001.html	PASS	PASS	FAIL	PASS	PASS	PASS
position-absolute-dynamic-overflow-002.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-relayout-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-relayout-002.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-relayout-003.html	PASS	PASS	PASS	FAIL	PASS	PASS
position-absolute-dynamic-relayout-004.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-dynamic-relayout-005.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-absolute-dynamic-relayout-006.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-absolute-dynamic-relayout-007.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-static-position-flex.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-static-position-floats-001.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-dynamic-static-position-floats-002.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-dynamic-static-position-floats-003.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-dynamic-static-position-floats-004.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-dynamic-static-position-inline.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-static-position-margin-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-static-position-margin-002.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-dynamic-static-position-table-cell.html	PASS	PASS	PASS	PASS	FAIL	FAIL
position-absolute-dynamic-static-position.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-fieldset.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-fit-content-auto-margin.html	45/45	45/45	41/45	15/45	33/45	0/45
position-absolute-fit-content.html	PASS	FAIL	PASS	PASS	PASS	FAIL
position-absolute-iframe-print-001.sub.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-iframe-print-002.sub.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-in-inline-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-in-inline-002.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-absolute-in-inline-003.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-absolute-in-inline-004.html	PASS	FAIL	PASS	FAIL	FAIL	FAIL
position-absolute-in-inline-005.html	PASS	PASS	FAIL	PASS	FAIL	FAIL
position-absolute-in-inline-006.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-007a.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-007b.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-008a.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-008b.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-009.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-010.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-011.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-012.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-absolute-in-inline-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-in-inline-margin-top.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-large-negative-inset.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-margin-auto-001.html	PASS	PASS	PASS	FAIL	PASS	FAIL
position-absolute-multicol-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-padding-percentage.html	2/2	2/2	2/2	2/2	2/2	2/2
position-absolute-percentage-height.html	2/2	2/2	0/2	0/2	0/2	2/2
position-absolute-replaced-intrinsic-size.tentative.html	PASS	PASS	PASS	ERROR	PASS	PASS
position-absolute-replaced-minmax.html	43/43	42/43	41/43	38/43	28/43	0/43
position-absolute-replaced-no-intrinsic-size.tentative.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-replaced-with-display-table.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-root-element-flex.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-root-element-grid.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-absolute-scrollable-overflow-001.html	14/14	14/14	14/14	6/14	6/14	14/14
position-absolute-scrollable-overflow-zero.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-semi-replaced-stretch-button.html	PASS	PASS	PASS	PASS	PASS	PASS
position-absolute-semi-replaced-stretch-input.html	PASS	PASS	PASS	FAIL	PASS	PASS
position-absolute-semi-replaced-stretch-other.html	PASS	PASS	PASS	FAIL	PASS	PASS
position-absolute-table-001.html	6/6	6/6	5/6	6/6	6/6	3/6
position-absolute-under-non-containing-stacking-context.html	PASS	PASS	FAIL	PASS	PASS	PASS
position-absolute-with-negative-sized-imcb.html	30/30	22/30	8/30	4/30	30/30	4/30
position-change.html	PASS	PASS	PASS	PASS	PASS	PASS
position-fixed-at-bottom-right-on-viewport.html	PASS	PASS	PASS	PASS	PASS	PASS
position-fixed-dynamic-transformed-sibling.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-fixed-overflow-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
position-fixed-root-element-flex.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-fixed-root-element-grid.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-fixed-scroll-nested-fixed.html	PASS	PASS	FAIL	PASS	PASS	FAIL
position-fixed-scroll-overlap.html	PASS	PASS	PASS	PASS	PASS	PASS
position-fixed-video-controls-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	PASS
position-relative-001.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-002.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-relative-003.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-004.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-005.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-006.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-007.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-008.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-009.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-010.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-relative-011.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-012.html	PASS	PASS	FAIL	FAIL	PASS	FAIL
position-relative-013.html	PASS	FAIL	FAIL	FAIL	FAIL	FAIL
position-relative-014.html	PASS	PASS	PASS	PASS	PASS	PASS
position-relative-015.html	20/20	19/20	20/20	19/20	20/20	20/20
position-relative-016.html	18/18	16/18	18/18	16/18	18/18	15/18
position-relative-aspect-ratio-001.html	4/4	4/4	4/4	4/4	1/4	4/4
position-relative-aspect-ratio-002.html	3/3	3/3	3/3	3/3	1/3	2/3
position-relative-table-caption.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-relative-table-tbody-left-absolute-child.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tbody-left.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tbody-top-absolute-child.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tbody-top.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-td-left.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-relative-table-td-top.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-relative-table-tfoot-left-absolute-child.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tfoot-left.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tfoot-top-absolute-child.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tfoot-top.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-thead-left-absolute-child.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-thead-left.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-thead-top-absolute-child.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-thead-top.html	PASS	PASS	FAIL	FAIL	FAIL	FAIL
position-relative-table-tr-left-absolute-child.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-relative-table-tr-left.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-relative-table-tr-top-absolute-child.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-relative-table-tr-top.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
position-static-001.html	PASS	PASS	PASS	PASS	PASS	FAIL
position-sticky-dynamic-ancestor-001.html	PASS	PASS	PASS	PASS	PASS	FAIL
replaced-object-backdrop.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
sticky-dialog.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
z-index-blend-will-change-overlapping-layers.html	PASS	PASS	PASS	PASS	PASS	FAIL