WPT
wpt / web-animations / timing-model / timelines / timelines.html
Spec: Web Animations ↗
Runs: Chrome 155.0.8041.0 (wpt@4a01b83e3, 2026-09-04) | Firefox 157.0a1 (wpt@e7122b73f, 2026-09-04) | Safari 251 preview (wpt@2c385f65e, 2026-09-04) | Ladybird 1.0-70fb3 (wpt@4a01b83e3, 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 | 4/5 | 5/5 | 5/5 | 4/5 | 3/5 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Timeline time increases once per animation frame | PASS | PASS | PASS | PASS | PASS | — |
| Timeline time increases once per animation frame in an iframe | FAIL | PASS | PASS | FAIL | PASS | — |
| Timeline time should be the same for all RAF callbacks in an animation frame | PASS | PASS | PASS | PASS | PASS | — |
| Performs a microtask checkpoint after updating timelines | PASS | PASS | PASS | PASS | FAIL | — |
| Runs finished promise before animation events | PASS | PASS | PASS | PASS | FAIL | — |