Name Description Size Coverage
absolute-child-shift-with-parent-contain.html Layout Instability: parent and contained absolute child moved together 1134 -
absolute-child-shift-with-parent-negative-overflow.html Layout Instability: parent and overflowing absolute child moved together 1196 -
absolute-child-shift-with-parent-overflow.html Layout Instability: parent and overflowing absolute child moved together 1169 -
absolute-child-shift-with-parent-will-change.html Layout Instability: parent and overflowing absolute child moved together 1193 -
add-remove-position-fixed.html Layout Instability: no shift for adding/removing position:fixed 1029 -
add-remove-position-sticky.html Layout Instability: no shift for adding/removing position:sticky 865 -
attribution-rectangles-css-pixels.html Layout Instability: attribution rectangles pixel units 2350 -
body-display-change.html Layout Instability: shift accompanied by body display change 1180 -
buffer-layout-shift.html Layout Instability entries are not available via the performance timeline 2041 -
buffered-flag.html Layout Instability: PerformanceObserver sees entries with buffered flag 1759 -
child-shift-with-parent-overflow-hidden.html Layout Instability: parent (with overflow:hidden) and child moved together 1173 -
child-shift-with-parent-overflow-x-clip.html Layout Instability: parent/child moved together with overflow-x: clip 1089 -
child-shift-with-parent.html Layout Instability: parent/child moved together 994 -
clip-negative-bottom-margin.html Layout Instability: clip with negative bottom margin 1020 -
composited-element-movement.html Layout Instability: element with compositing layer hint 1387 -
contain-paint-fully-clipped.html Layout Instability: fully clipped by contain:paint 920 -
content-visibility-auto-offscreen.html Layout Instability: off-screen content-visibility:auto content 1585 -
content-visibility-auto-onscreen.html Layout Instability: on-screen content-visibility:auto content 868 -
content-visibility-auto-resize.html Layout Instability: resizing content-visibility:auto content 944 -
content-visibility-hidden.html Layout Instability: content-visibility:hidden content 862 -
display-change-with-transform.html Layout Instability: change display type with transform 762 -
expand-above-viewport.html Layout Instability: layout shift when content expanded above the viewport 1615 -
fixed-position-move.html Layout Instability: movement of fixed position 900 -
fully-clipped-visual-rect.html Layout Instability: fully clipped visual rect 891 -
idlharness.html Layout Instability IDL tests 1814 -
ignore-fixed-and-sticky.html Layout Instability: ignore fixed and sticky positioning 1234 -
inline-flow-shift-one-line.html Layout Instability: inline/text movement is detected 1526 -
inline-flow-shift-vertical-rl.html Layout Instability: vertical-rl inline/text movement is detected 1602 -
inline-flow-shift.html Layout Instability: inline/text movement is detected 1530 -
input-timestamp.html Layout Instability: observe timestamp after user input 2643 -
local-shift-without-viewport-shift-2.html Layout Instability: local shift without viewport shift 931 -
local-shift-without-viewport-shift.html Layout Instability: local shift without viewport shift 942 -
main-frame.html Layout Instability: subframe layout shift score 1475 -
META.yml 102 -
mousemove-becomes-drag.html Layout Instability: no shift in mouse moves with a button pressed 1836 -
move-distance-clamped.html Layout Instability: distance fraction not more than 1.0 1489 -
move-transformed.html Layout Instability: shift of a transformed container 886 -
multi-clip-visual-rect.html Layout Instability: multi clip visual rect 1200 -
multicol-000.html 717 -
multicol-001.html 1042 -
opacity-nonzero-to-zero.html Layout Instability: opacity:0 798 -
opacity-zero-layout-and-visible.html Layout Instability: opacity:0 1023 -
opacity-zero.html Layout Instability: opacity:0 1055 -
outline.html Layout Instability: outline doesn't contribute to layout shift 749 -
partially-clipped-visual-rect.html Layout Instability: partially clipped visual rect 967 -
pointerdown-becomes-scroll.html Layout Instability: shift in pointerdown becoming scroll 1866 -
pointerdown-becomes-tap.html Layout Instability: shift in pointerdown becoming tap 1743 -
pointermove-becomes-drag.html Layout Instability: no shift in pointerdown becoming dragging 2065 -
recent-input.html Layout Instability: observe after user input 2497 -
resources -
rtl-distance.html Layout Instability: movement distance uses starting corner 995 -
shift-into-viewport-inline-direction-and-scroll.html Layout Instability: shift into viewport in inline direction with scroll 930 -
shift-into-viewport-inline-direction.html Layout Instability: shift into viewport in inline direction 815 -
shift-into-viewport.html Layout Instability: shift into viewport 1054 -
shift-invisible.html Layout Instability: shift of invisible element not counted 703 -
shift-outside-viewport-inline-direction.html Layout Instability: shift out of viewport in inline direction 808 -
shift-outside-viewport.html Layout Instability: shift outside viewport 950 -
shift-scroll-anchoring-natural-scroll.html Layout Instability: shift offscreen with scroll anchoring and natural scroll 1566 -
shift-while-scrolled.html Layout Instability: shift while scrolled 1075 -
shift-with-counter-scroll-and-transform.html Layout Instability: shift with counter scroll and transform not counted 1542 -
shift-with-counter-scroll-and-translate.html Layout Instability: shift with counter scroll and translate not counted 1522 -
shift-with-counterscroll-2.html Layout Instability: shift with counterscroll not counted, with 2 scrollers 1413 -
shift-with-counterscroll.html Layout Instability: shift with counterscroll not counted 1094 -
shift-with-overflow-status-change.html Layout Instability: change under overflow clipping container causing shift and overflow status change at the same time 1290 -
simple-block-movement.html Layout Instability: simple block movement is detected 1050 -
sources-enclosure.html Layout Instability: source attribution with redundant enclosure 1719 -
sources-maximpact.html Layout Instability: source attribution prioritization 1735 -
sources.html Layout Instability: sources attribute 1126 -
sticky-descendant-move.html Layout Instability: movement of descendant of sticky positioned 1050 -
sticky-layout-no-change.html Layout Instability: sticky positioned layout no change 899 -
sub-frame.html 1197 -
supported-layout-type.html PerformanceObserver.supportedEntryTypes contains "layout-shift" 717 -
toJSON.html Layout Instability: toJSON 1466 -
transform-above-filter-dynamic.html Layout Instability: addition of scale transform above filter 779 -
transform-above-perspective-dynamic.html Layout Instability: addition of transform above perspective 754 -
transform-change.html Layout Instability: no layout shift for transform change 1147 -
transform-counter-layout-shift.html Layout Instability: no layout shift if transform change counters location change 1292 -
transform.html Layout Instability: shift inside a transformed container 1100 -
translate-change.html Layout Instability: no layout shift for change of individual transform property 1150 -
translate-counter-layout-shift.html Layout Instability: no layout shift if translate change counters location change 1272 -
video.html Layout Instability: no shifts from advancing video track 1062 -
visibility-hidden-layout-and-visible.html Layout Instability: visibility:hidden change with layout 1124 -
visibility-hidden.html Layout Instability: visibility:hidden 845 -
visible-to-hidden.html Layout Instability: visibility:hidden 889 -
WEB_FEATURES.yml 51 -