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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 155.0.8039.0 (wpt@6ec9fd59f, 2026-09-03) | Firefox 157.0a1 (wpt@6ec9fd59f, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-795e1 (wpt@7e3d005d7, 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

AreaChromeFirefoxSafariLadybirdServoBlitz
Total95.8%1424/148794.5%1405/148797.5%1450/148772.6%1079/148751.3%763/148748.6%723/1487
crashtests100.0%35/35100.0%35/35100.0%35/3597.1%34/3588.6%31/35100.0%35/35
parsing99.0%569/57599.0%569/57599.3%571/57557.6%331/57555.3%318/57564.3%370/575
responsive85.7%6/757.1%4/7100.0%7/771.4%5/70.0%0/70.0%0/7
stability66.7%2/366.7%2/366.7%2/366.7%2/30.0%0/30.0%0/3
TestChromeFirefoxSafariLadybirdServoBlitz
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.html9/99/99/94/90/90/9
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.html3/32/33/33/30/30/3
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-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-base-response-001.html3/33/33/30/33/33/3
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.htmlPASSPASSPASSPASSPASSFAIL
animation-delay-009.htmlPASSPASSPASSPASSPASSFAIL
animation-delay-010.htmlPASSPASSPASSPASSFAILFAIL
animation-delay-011.htmlPASSPASSPASSPASSPASSPASS
animation-delay-012.htmlPASSPASSPASSPASSPASSPASS
animation-duration-infinite.htmlPASSPASSPASSPASSPASSPASS
animation-important-001.html7/77/77/77/75/70/7
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-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.htmlPASSPASSPASSPASSFAILFAIL
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.html5/54/5NOT RUN5/50/5NOT RUN
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.htmlPASSFAILPASSPASSFAILNOT RUN
display-none-to-display-block.htmlPASSPASSPASSPASSPASSFAIL
display-via-custom-prop-animation-crash.htmlPASSPASSPASSPASSTIMEOUTPASS
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.html98/9898/9898/9898/9893/980/98
inheritance-pseudo-element.htmlPASSPASSPASSPASSFAILFAIL
inheritance.html16/1616/1616/1616/1616/1616/16
jump-start-animation-before-phase.htmlPASSPASSPASSFAILTIMEOUTPASS
keyframes-remove-documentElement-crash.htmlPASSPASSPASSTIMEOUTPASSPASS
keyframes-rule-caching.htmlPASSPASSFAILPASSFAILFAIL
keyframes-tree-scoped-property-with-var.htmlPASSPASSFAILFAILFAILNOT RUN
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-transform-animation.htmlPASSPASSPASSPASSFAILFAIL
svg-use-transform-keyframes-custom-property-override.htmlPASSPASSPASSPASSTIMEOUTFAIL
text-decoration-inset-auto.html34/7373/7352/730/730/7355/73
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.htmlPASSPASSPASSPASSPASSPASS
translation-animation-subpixel-offset.htmlPASSPASSPASSPASSPASSFAIL
webkit-writing-mode-crash.htmlPASSPASSPASSPASSPASSPASS