WPT
wpt / web-animations / interfaces / KeyframeEffect / constructor.html
Spec: Web Animations ↗
Runs: Chrome 155.0.8041.0 (wpt@18be93235, 2026-09-04) | Firefox 157.0a1 (wpt@1b4bc17cf, 2026-09-04) | Safari 251 preview (wpt@2c385f65e, 2026-09-04) | Ladybird 1.0-17043 (wpt@25681acff, 2026-09-04) | Servo Servo 0.6 (wpt@2c385f65e, 2026-09-04) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 175/175 | 175/175 | 173/175 | 121/175 | 0/175 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| A KeyframeEffect can be constructed with no frames | PASS | PASS | PASS | PASS | FAIL | — |
| easing values are parsed correctly when passed to the KeyframeEffect constructor in KeyframeEffectOptions | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid easing values are correctly rejected when passed to the KeyframeEffect constructor in KeyframeEffectOptions | PASS | PASS | PASS | PASS | FAIL | — |
| composite values are parsed correctly when passed to the KeyframeEffect constructor in property-indexed keyframes | PASS | PASS | PASS | PASS | FAIL | — |
| composite values are parsed correctly when passed to the KeyframeEffect constructor in regular keyframes | PASS | PASS | PASS | PASS | FAIL | — |
| composite value is auto if the composite operation specified on the keyframe effect is being used | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a one property two value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property two value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one shorthand property two value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one shorthand property two value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a two property (one shorthand and one of its longhand components) two value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property (one shorthand and one of its longhand components) two value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a two property (one shorthand and one of its shorthand components) two value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property (one shorthand and one of its shorthand components) two value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a two property two value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property two value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a two property property-indexed keyframes specification with different numbers of values | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property property-indexed keyframes specification with different numbers of values roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframes specification with an invalid value | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframes specification with an invalid value roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property two value property-indexed keyframes specification that needs to stringify its values | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property two value property-indexed keyframes specification that needs to stringify its values roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframes specification with a CSS variable reference | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframes specification with a CSS variable reference roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframes specification with a CSS variable reference in a shorthand property | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframes specification with a CSS variable reference in a shorthand property roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property one value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property one value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property one non-array value property-indexed keyframes specification | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property one non-array value property-indexed keyframes specification roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property two value property-indexed keyframes specification where the first value is invalid | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property two value property-indexed keyframes specification where the first value is invalid roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property two value property-indexed keyframes specification where the second value is invalid | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property two value property-indexed keyframes specification where the second value is invalid roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframes specification with a CSS variable as the property | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframes specification with a CSS variable as the property roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a single offset | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a single offset roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets that is too short | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets that is too short roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets that is too long | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets that is too long roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an empty array of offsets | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an empty array of offsets roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets with an embedded null value | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets with an embedded null value roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets with a trailing null value | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets with a trailing null value roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets with leading and trailing null values | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets with leading and trailing null values roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets with adjacent null values | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets with adjacent null values roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets with all null values (and too many at that) | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets with all null values (and too many at that) roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a single null offset | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a single null offset roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of offsets that is not strictly ascending in the unused part of the array | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of offsets that is not strictly ascending in the unused part of the array roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe without any specified easing | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe without any specified easing roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a single easing | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a single easing roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of easings | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of easings roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of easings that is too short | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of easings that is too short roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a single-element array of easings | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a single-element array of easings roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an empty array of easings | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an empty array of easings roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with an array of easings that is too long | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with an array of easings that is too long roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a single composite operation | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a single composite operation roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a composite array | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a composite array roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a composite array that is too short | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a composite array that is too short roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a composite array that is too long | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a composite array that is too long roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a property-indexed keyframe with a single-element composite array | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a property-indexed keyframe with a single-element composite array roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property one keyframe sequence | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property one keyframe sequence roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a one property two keyframe sequence | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property two keyframe sequence roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a two property two keyframe sequence | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property two keyframe sequence roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a one shorthand property two keyframe sequence | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one shorthand property two keyframe sequence roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a two property (a shorthand and one of its component longhands) two keyframe sequence | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property (a shorthand and one of its component longhands) two keyframe sequence roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a two property keyframe sequence where one property is missing from the first keyframe | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property keyframe sequence where one property is missing from the first keyframe roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a two property keyframe sequence where one property is missing from the last keyframe | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property keyframe sequence where one property is missing from the last keyframe roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a one property two keyframe sequence that needs to stringify its values | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property two keyframe sequence that needs to stringify its values roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with a CSS variable reference | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with a CSS variable reference roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with a CSS variable reference in a shorthand property | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with a CSS variable reference in a shorthand property roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with a CSS variable as its property | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with a CSS variable as its property roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with duplicate values for a given interior offset | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with duplicate values for a given interior offset roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with duplicate values for offsets 0 and 1 | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with duplicate values for offsets 0 and 1 roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a two property four keyframe sequence | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a two property four keyframe sequence roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a single keyframe sequence with omitted offset | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a single keyframe sequence with omitted offset roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a single keyframe sequence with null offset | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a single keyframe sequence with null offset roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a single keyframe sequence with string offset | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a single keyframe sequence with string offset roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a single keyframe sequence with a single calc() offset | PASS | PASS | FAIL | FAIL | FAIL | — |
| A KeyframeEffect constructed with a single keyframe sequence with a single calc() offset roundtrips | PASS | PASS | FAIL | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property keyframe sequence with some omitted offsets | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a one property keyframe sequence with some omitted offsets roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property keyframe sequence with some null offsets | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a one property keyframe sequence with some null offsets roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a two property keyframe sequence with some omitted offsets | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed with a two property keyframe sequence with some omitted offsets roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a one property keyframe sequence with all omitted offsets | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a one property keyframe sequence with all omitted offsets roundtrips | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with different easing values, but the same easing value for a given offset | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with different easing values, but the same easing value for a given offset roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect can be constructed with a keyframe sequence with different composite values, but the same composite value for a given offset | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with a keyframe sequence with different composite values, but the same composite value for a given offset roundtrips | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with keyframes with an out-of-bounded positive offset | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with keyframes with an out-of-bounded negative offset | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes not loosely sorted by offset | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes not loosely sorted by offset even though not all offsets are specified | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes with offsets out of range | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with keyframes not loosely sorted by offset | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes with an invalid easing value | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes with an invalid easing value as one of the array values | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframe with an invalid easing in the unused part of the array of easings | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with empty property-indexed keyframe with an invalid easing | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with empty property-indexed keyframe with an invalid easings array | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with a keyframe sequence with an invalid easing value | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes with an invalid composite value | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with property-indexed keyframes with an invalid composite value as one of the array values | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor throws with keyframes with an invalid composite value | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed without any KeyframeEffectOptions object | PASS | PASS | PASS | FAIL | FAIL | — |
| A KeyframeEffect constructed by an empty KeyframeEffectOptions object | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by a normal KeyframeEffectOptions object | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by a double value | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by +Infinity | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by an Infinity duration | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by an auto duration | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by an Infinity iterations | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by an auto fill | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed by a forwards fill | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by -Infinity | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by NaN | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a negative value | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a negative Infinity duration | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a NaN duration | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a negative duration | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a string duration | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a negative Infinity iterations | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a NaN iterations | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a negative iterations | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a blank easing | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by an unrecognized easing | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by an 'initial' easing | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by an 'inherit' easing | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a variable easing | PASS | PASS | PASS | PASS | FAIL | — |
| Invalid KeyframeEffect option by a multi-value easing | PASS | PASS | PASS | PASS | FAIL | — |
| A KeyframeEffect constructed with null target | PASS | PASS | PASS | PASS | FAIL | — |
| KeyframeEffect constructor propagates exceptions generated by accessing the options object | PASS | PASS | PASS | PASS | FAIL | — |