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-backgrounds / animations

Spec: CSS Backgrounds ↗

Runs: Chrome 159.0.8151.0 (wpt@3a4bbe672, 2026-11-09) | Firefox 162.0a1 (wpt@3a4bbe672, 2026-11-09) | Safari 256 preview (wpt@3a4bbe672, 2026-11-09) | Ladybird 1.0-da9df (wpt@f556782c2, 2026-11-09) | Servo Servo 0.8 (wpt@fea36e49d, 2026-11-08) | Blitz b6ace6a0c (wpt@f6789b0b5, 2026-11-09)

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	96.2%4978/5174	95.9%4964/5174	98.2%5084/5174	NO DATA	70.7%3662/5174	70.1%3630/5174
invalidation	100.0%4/4	100.0%4/4	100.0%4/4	NO DATA	25.0%1/4	25.0%1/4

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	96.2%4974/5170	95.9%4960/5170	98.2%5080/5170	NO DATA	70.8%3661/5170	70.1%3629/5170
background-color-animation-backdrop-infinite-duration-crash.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-custom-property.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-custom-timing-function-reverse.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	PASS
background-color-animation-custom-timing-function.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	PASS
background-color-animation-element-not-visible-at-current-viewport.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-fallback-additive-keyframe.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-fallback-missing-0-percent.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-fallback-missing-100-percent.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-fallback-replace.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-field-crash.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-fragmented.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-half-opaque.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	PASS
background-color-animation-in-body.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-non-empty-no-draw-crash.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-non-zero-size-element-change-to-zero.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-offset-position-not-stuck.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-pseudo-element.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-removed-element-crash.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-single-keyframe.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-three-keyframes1.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-three-keyframes2.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-three-keyframes3.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-will-change-contents.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-with-blur.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-with-images.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-with-mask.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	PASS
background-color-animation-with-table1.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-with-table2.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-with-table3.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-with-table4.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-with-zero-playbackRate.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-animation-zero-size-element-change-to-non-zero.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation-zero-size-element.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-color-animation.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-interpolation.html	172/172	168/172	172/172	NOT RUN	126/172	126/172
background-color-scroll-into-viewport.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	PASS
background-color-transition-colormix.html	PASS	PASS	PASS	NOT RUN	FAIL	FAIL
background-color-transition-currentcolor.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
background-color-transition.html	PASS	PASS	PASS	NOT RUN	PASS	FAIL
background-color-transparent-animation-in-body.html	PASS	PASS	PASS	NOT RUN	PASS	PASS
background-image-interpolation.html	180/288	198/288	198/288	NOT RUN	132/288	132/288
background-position-composition.html	70/70	70/70	70/70	NOT RUN	35/70	35/70
background-position-interpolation.html	196/196	196/196	196/196	NOT RUN	147/196	147/196
background-position-origin-interpolation.html	280/280	280/280	280/280	NOT RUN	210/280	210/280
background-position-x-interpolation.html	112/112	112/112	112/112	NOT RUN	84/112	84/112
background-position-y-interpolation.html	112/112	112/112	112/112	NOT RUN	84/112	84/112
background-size-composition.html	84/84	74/84	84/84	NOT RUN	38/84	38/84
background-size-interpolation.html	364/364	330/364	364/364	NOT RUN	271/364	271/364
border-bottom-left-radius-composition.html	42/42	42/42	42/42	NOT RUN	21/42	21/42
border-bottom-right-radius-composition.html	42/42	42/42	42/42	NOT RUN	21/42	21/42
border-bottom-width-composition.html	40/40	40/40	40/40	NOT RUN	40/40	40/40
border-color-interpolation.html	144/144	144/144	144/144	NOT RUN	108/144	90/144
border-image-outset-composition.html	112/112	112/112	112/112	NOT RUN	56/112	56/112
border-image-outset-interpolation.html	168/168	168/168	168/168	NOT RUN	126/168	126/168
border-image-slice-composition.html	112/112	112/112	112/112	NOT RUN	56/112	56/112
border-image-slice-interpolation-stability.html	PASS	PASS	PASS	NOT RUN	FAIL	FAIL
border-image-slice-interpolation.html	434/434	434/434	434/434	NOT RUN	343/434	343/434
border-image-source-interpolation.html	206/294	294/294	294/294	NOT RUN	245/294	245/294
border-image-width-composition.html	112/112	112/112	112/112	NOT RUN	56/112	56/112
border-image-width-interpolation.html	558/558	558/558	558/558	NOT RUN	443/558	443/558
border-left-width-composition.html	40/40	40/40	40/40	NOT RUN	40/40	40/40
border-radius-interpolation.html	196/196	196/196	196/196	NOT RUN	147/196	147/196
border-right-width-composition.html	40/40	40/40	40/40	NOT RUN	40/40	40/40
border-top-left-radius-composition.html	42/42	42/42	42/42	NOT RUN	21/42	21/42
border-top-right-radius-composition.html	42/42	42/42	42/42	NOT RUN	21/42	21/42
border-top-width-composition.html	40/40	40/40	40/40	NOT RUN	40/40	40/40
border-width-interpolation.html	256/256	256/256	256/256	NOT RUN	192/256	192/256
border-width-transition-with-style-change.html	PASS	PASS	PASS	NOT RUN	FAIL	FAIL
box-shadow-composition.html	80/80	80/80	80/80	NOT RUN	40/80	40/80
box-shadow-interpolation.html	402/402	330/402	402/402	NOT RUN	251/402	233/402
discrete-no-interpolation.html	252/252	252/252	252/252	NOT RUN	210/252	210/252
two-background-color-animation-diff-length1.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
two-background-color-animation-diff-length2.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL
two-background-color-animation-diff-length3.html	PASS	PASS	PASS	NOT RUN	TIMEOUT	FAIL