WPT
wpt / css / css-properties-values-api / at-property-animation.html
Spec: CSS Properties and Values API ↗
Runs: Chrome 155.0.8038.0 (wpt@05fffeacb, 2026-09-02) | Firefox 157.0a1 (wpt@7addae031, 2026-09-02) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-410b4 (wpt@ce41a9c47, 2026-09-02) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 19/19 | 17/19 | 18/19 | 8/19 | 6/19 | 0/19 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| @keyframes works with @property | PASS | PASS | PASS | PASS | PASS | FAIL |
| @keyframes picks up the latest @property in the document | PASS | PASS | PASS | PASS | PASS | FAIL |
| Ongoing animation picks up redeclared custom property | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Ongoing animation matches new keyframes against the current registration | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Ongoing animation picks up redeclared intial value | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Ongoing animation picks up redeclared inherits flag | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Ongoing animation picks up redeclared meaning of 'unset' | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Transitioning from initial value | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| Transitioning from specified value | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| Transition triggered by initial value change | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| No transition when changing types | PASS | PASS | PASS | PASS | PASS | FAIL |
| No transition when removing @property rule | PASS | PASS | PASS | FAIL | FAIL | FAIL |
| Ongoing transition reverts to its initial state | PASS | PASS | FAIL | FAIL | FAIL | FAIL |
| Unregistered properties referencing animated properties update correctly. | PASS | PASS | PASS | FAIL | PASS | FAIL |
| Registered properties referencing animated properties update correctly. | PASS | PASS | PASS | FAIL | PASS | FAIL |
| CSS animation setting "inherit" for a custom property on a keyframe is responsive to changing that custom property on the parent. | PASS | FAIL | PASS | FAIL | FAIL | FAIL |
| JS-originated animation setting "inherit" for a custom property on a keyframe is responsive to changing that custom property on the parent. | PASS | FAIL | PASS | FAIL | FAIL | FAIL |
| CSS animation setting "currentColor" for a custom property on a keyframe is responsive to changing "color" on the parent. | PASS | PASS | PASS | FAIL | PASS | FAIL |
| JS-originated animation setting "currentColor" for a custom property on a keyframe is responsive to changing "color" on the parent. | PASS | PASS | PASS | FAIL | FAIL | FAIL |