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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-animations

Spec: CSS Animations ↗

Runs: Chrome 158.0.8110.0 (wpt@850b36a56, 2026-10-18) | Firefox 160.0a1 (wpt@b58866519, 2026-10-18) | Safari 254 preview (wpt@850b36a56, 2026-10-18) | Ladybird 1.0-e7b21 (wpt@850b36a56, 2026-10-18) | Servo Servo 0.7 (wpt@df642c414, 2026-10-17) | Blitz fb8d6c15e (wpt@cd1d8aa5b, 2026-10-17)

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 month3 months6 months1 year2 years4 yearsAll time
0%20%40%60%80%100%Nov 2025Dec 2025Jan 2026Feb 2026Mar 2026Apr 2026May 2026Jun 2026Jul 2026Aug 2026Sep 2026Oct 2026ChromeFirefoxSafariLadybirdServoBlitz

Sort: alphabetical | by subtest count

AreaChromeFirefoxSafariLadybirdServoBlitz
Total98.4%1486/150993.7%1414/150997.0%1464/150972.2%1090/150950.6%765/150954.0%816/1509
crashtests100.0%35/35100.0%35/35100.0%35/35100.0%35/3588.5%31/35100.0%35/35
parsing98.9%569/57598.9%569/57599.3%571/57557.5%331/57555.3%318/57569.0%397/575
responsive85.7%6/757.1%4/7100.0%7/785.7%6/70.0%0/70.0%0/7
stability100.0%2/2100.0%2/2100.0%2/2100.0%2/20.0%0/20.0%0/2
TestChromeFirefoxSafariLadybirdServoBlitz
Total98.2%874/89090.3%804/89095.3%849/89080.4%716/89046.7%416/89043.1%384/890
AnimationEffect-getComputedTiming.tentative.html43/4343/4343/4343/430/430/43
AnimationEffect-updateTiming.tentative.html5/55/55/52/50/50/5
CSSAnimation-animationName.tentative.html3/33/33/33/30/30/3
CSSAnimation-canceling.tentative.html9/99/99/99/90/90/9
CSSAnimation-compositeOrder.tentative.html1/22/22/22/20/20/2
CSSAnimation-effect.tentative.html8/88/88/86/80/80/8
CSSAnimation-finished.tentative.html3/33/33/33/30/30/3
CSSAnimation-getCurrentTime.tentative.html2/22/22/22/20/20/2
CSSAnimation-getKeyframes-crash.htmlPASSPASSPASSPASSPASSPASS
CSSAnimation-id.tentative.htmlPASSPASSPASSPASSFAILFAIL
CSSAnimation-pausing.tentative.html9/99/99/99/90/90/9
CSSAnimation-playState.tentative.html5/55/55/55/50/50/5
CSSAnimation-ready.tentative.html5/55/55/55/50/50/5
CSSAnimation-startTime.tentative.html3/33/33/33/30/30/3
Document-getAnimations.tentative.html17/1818/1818/1812/180/180/18
Element-getAnimations-dynamic-changes.tentative.html2/55/55/55/50/50/5
Element-getAnimations.tentative.html22/2222/2222/2217/220/220/22
KeyframeEffect-getKeyframes.tentative.html29/3229/3232/321/320/320/32
KeyframeEffect-setKeyframes.tentative.html3/33/33/31/30/30/3
KeyframeEffect-target.tentative.html3/33/33/33/30/30/3
animate-bg-color-with-change-during-delay.htmlPASSPASSPASSPASSTIMEOUTFAIL
animate-font-size-with-margin-override.htmlPASSPASSPASSPASSFAILFAIL
animate-with-background-color-hsla-to-legacy-rgb.htmlPASSPASSPASSPASSTIMEOUTFAIL
animate-with-background-color-oklch-001.htmlPASSPASSPASSPASSTIMEOUTFAIL
animate-with-background-color-oklch-002.html0/20/22/22/20/20/2
animate-with-color-mix-2.htmlPASSFAILPASSFAILFAILFAIL
animate-with-color-mix.html6/60/66/66/60/60/6
animate-with-relative-color.html2/20/22/20/20/20/2
animation-append-stylesheet-reverse.htmlPASSPASSPASSPASSPASSFAIL
animation-base-response-001.html3/33/33/31/33/33/3
animation-base-response-002.htmlPASSPASSPASSFAILPASSPASS
animation-base-response-003.htmlPASSPASSPASSFAILPASSPASS
animation-base-response-004.htmlPASSPASSPASSFAILFAILFAIL
animation-before-initial-box-construction-001.htmlPASSPASSPASSPASSERRORFAIL
animation-change-underlying-value-changed-in-flight.html2/22/22/22/20/20/2
animation-composition-keyframes.html6/66/66/66/60/60/6
animation-composition.html6/66/66/66/60/60/6
animation-css-variable-dependent-property.htmlPASSPASSPASSPASSFAILFAIL
animation-css-variable-in-keyframe-adjusted.html2/22/22/22/20/20/2
animation-delay-008.htmlPASSPASSPASSPASSPASSPASS
animation-delay-009.htmlPASSPASSPASSPASSPASSFAIL
animation-delay-010.htmlPASSPASSPASSFAILFAILFAIL
animation-delay-011.htmlPASSPASSPASSPASSPASSPASS
animation-delay-012.htmlPASSPASSPASSPASSPASSPASS
animation-duration-infinite.htmlPASSPASSPASSPASSPASSPASS
animation-important-001.html7/77/77/77/75/74/7
animation-important-002.htmlPASSFAILPASSFAILFAILFAIL
animation-important-with-transition.html5/55/55/54/51/51/5
animation-iteration-count-009.html4/44/44/44/44/44/4
animation-iteration-count-010.html6/66/66/66/66/66/6
animation-iteration-count-calc.htmlPASSPASSPASSPASSPASSPASS
animation-iteration-event-001.htmlPASSPASSPASSPASSPASSSKIP
animation-iteration-event-002.htmlPASSPASSPASSPASSPASSSKIP
animation-multiple-from-to-keyframes-with-only-timing-function.htmlPASSPASSPASSPASSPASSPASS
animation-name-case-sensitive.htmlPASSPASSPASSPASSPASSPASS
animation-name-in-nested-shadow.htmlFAILFAILPASSFAILFAILFAIL
animation-name-in-shadow-part-inner-match.htmlPASSPASSPASSPASSPASSPASS
animation-name-in-shadow-part-outer-match.htmlPASSFAILPASSFAILFAILFAIL
animation-name-in-shadow-part.htmlPASSPASSPASSPASSPASSFAIL
animation-name-inline-style.htmlPASSPASSPASSPASSPASSPASS
animation-offscreen-to-onscreen.htmlPASSPASSPASSPASSTIMEOUTPASS
animation-opacity-pause-and-set-time.htmlPASSPASSPASSPASSTIMEOUTFAIL
animation-play-state-005.tentative.htmlPASSPASSPASSFAILFAILSKIP
animation-pseudo-dynamic-001.htmlPASSPASSPASSPASSPASSPASS
animation-restarted-after-changing-iteration-count-after-completion.htmlPASSPASSPASSFAILFAILFAIL
animation-style-element-replaced-with-keyframes-rule-of-same-name.htmlPASSPASSPASSPASSPASSFAIL
animation-transform-pause-and-set-time.htmlPASSPASSPASSPASSTIMEOUTFAIL
animation-transition-color-crash.htmlPASSPASSPASSPASSPASSPASS
animationevent-interface.html42/4242/4242/4242/4241/420/42
animationevent-marker-pseudoelement.htmlPASSPASSPASSPASSTIMEOUTSKIP
animationevent-pseudoelement.htmlPASSPASSPASSPASSPASSSKIP
animationevent-types.html3/33/33/33/30/30/3
cancel-animation-shadow-slot-invalidation.htmlPASSPASSPASSPASSPASSFAIL
cancel-events-on-remove.html5/54/55/55/50/50/5
computed-style-animation-parsing.html7/77/77/77/77/77/7
dialog-animation.htmlPASSPASSPASSPASSFAILFAIL
dialog-backdrop-animation.htmlPASSPASSPASSPASSFAILFAIL
display-contents-animates.htmlPASSPASSPASSPASSPASSFAIL
display-interpolation.html138/13898/138138/138138/13886/13886/138
display-none-dont-cancel-pseudo.tentative.htmlPASSFAILPASSPASSFAILFAIL
display-none-dont-cancel.tentative.html5/50/55/54/51/50/5
display-none-prevents-starting-in-subtree.htmlPASSPASSPASSPASSFAILFAIL
display-none-to-display-block-dont-cancel.tentative.htmlPASSPASSPASSPASSPASSFAIL
display-none-to-display-block-while-running.tentative.htmlPASSFAILPASSPASSFAILFAIL
display-none-to-display-block.htmlPASSPASSPASSPASSPASSFAIL
display-via-custom-prop-animation-crash.htmlPASSPASSPASSTIMEOUTTIMEOUTPASS
empty-pseudo-class-with-animation.htmlPASSPASSPASSPASSPASSFAIL
event-dispatch.tentative.html30/3230/3230/3227/320/320/32
event-order.tentative.html3/66/66/60/60/60/6
flip-running-animation-via-variable.htmlPASSPASSPASSPASSTIMEOUTFAIL
historical.htmlPASSPASSPASSPASSPASSPASS
idlharness.html98/9898/9898/9898/9893/9858/98
inheritance-pseudo-element.htmlPASSPASSPASSPASSFAILFAIL
inheritance.html16/1616/1616/1616/1616/1616/16
jump-start-animation-before-phase.htmlPASSPASSPASSFAILTIMEOUTPASS
keyframes-remove-documentElement-crash.htmlPASSPASSPASSPASSPASSPASS
keyframes-rule-caching.htmlPASSPASSFAILPASSFAILPASS
keyframes-tree-scoped-property-with-var.htmlPASSPASSFAILFAILFAILFAIL
keyframes-unrelated-custom-property.htmlPASSPASSPASSPASSPASSPASS
keyframes-zero-angle-crash.htmlPASSPASSPASSPASSPASSPASS
missing-values-first-keyframe.htmlPASSPASSPASSPASSFAILFAIL
missing-values-last-keyframe.htmlPASSPASSPASSPASSFAILFAIL
missing-values-middle-keyframe.htmlPASSPASSPASSPASSPASSPASS
nested-scale-animations.htmlPASSPASSFAILPASSPASSFAIL
neutral-var-keyframe-cycle-crash.htmlPASSPASSPASSPASSPASSPASS
neutral-var-keyframe-cycle-registered-additive-crash.htmlPASSPASSPASSPASSPASSPASS
neutral-var-keyframe-cycle-registered-crash.htmlPASSPASSPASSPASSPASSPASS
parent-after-change-style-pseudo-element-flicker.htmlPASSPASSPASSPASSPASSPASS
pending-style-changes-001.html2/22/22/22/20/20/2
revert-rule-keyframes-dynamic.html2/20/22/20/20/20/2
revert-rule-keyframes.html2/20/22/20/22/22/2
sample-on-last-keyframe.htmlPASSPASSPASSPASSFAILFAIL
simultaneous-animations-crash.htmlPASSPASSPASSPASSPASSPASS
style-animation-parsing.html5/55/55/55/55/55/5
svg-color-visited-currentcolor.html3/33/33/32/30/30/3
svg-transform-animation.htmlPASSPASSPASSPASSFAILFAIL
svg-use-transform-keyframes-custom-property-override.htmlPASSPASSPASSPASSTIMEOUTFAIL
text-decoration-inset-auto.html90/9075/9055/901/900/9055/90
transform-animation-under-large-scale.htmlPASSPASSFAILPASSPASSPASS
transition-properties-not-animatable.html126/126126/126126/126126/126105/126105/126
transition-ready-time-offscreen.htmlPASSPASSPASSPASSFAILFAIL
translation-animation-on-important-property.htmlPASSPASSPASSFAILPASSPASS
translation-animation-subpixel-offset.htmlPASSPASSPASSPASSPASSPASS
webkit-writing-mode-crash.htmlPASSPASSPASSPASSPASSPASS