WPT
wpt / css / css-position / animations / left-composition.html
Spec: CSS Positioned Layout ↗
Runs: Chrome 155.0.8039.0 (wpt@426cae6e2, 2026-09-03) | Firefox 157.0a1 (wpt@426cae6e2, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a9df8 (wpt@e6996908b, 2026-09-03) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | 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 | 60/60 | 60/60 | 60/60 | 60/60 | 30/60 | 4/60 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to add [200px] at (-0.3) should be [120px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to add [200px] at (0) should be [150px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to add [200px] at (0.5) should be [200px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to add [200px] at (1) should be [250px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to add [200px] at (1.5) should be [300px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to add [200px] at (-0.3) should be [120px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to add [200px] at (0) should be [150px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to add [200px] at (0.5) should be [200px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to add [200px] at (1) should be [250px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to add [200px] at (1.5) should be [300px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [10px] to add [2px] at (-0.5) should be [114px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [10px] to add [2px] at (0) should be [110px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [10px] to add [2px] at (0.5) should be [106px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [10px] to add [2px] at (1) should be [102px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [10px] to add [2px] at (1.5) should be [98px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [10px] to add [2px] at (-0.5) should be [114px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [10px] to add [2px] at (0) should be [110px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [10px] to add [2px] at (0.5) should be [106px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [10px] to add [2px] at (1) should be [102px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [10px] to add [2px] at (1.5) should be [98px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [20%] at (-0.3) should be [calc(130px + 4%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [20%] at (0) should be [calc(100px + 10%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [20%] at (0.5) should be [calc(50px + 20%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [20%] at (1) should be [30%] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [20%] at (1.5) should be [calc(-50px + 40%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [20%] at (-0.3) should be [calc(130px + 4%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [20%] at (0) should be [calc(100px + 10%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [20%] at (0.5) should be [calc(50px + 20%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [20%] at (1) should be [30%] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [20%] at (1.5) should be [calc(-50px + 40%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (-0.3) should be [calc(130px + 13%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (0) should be [calc(100px + 10%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (0.5) should be [calc(50px + 5%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (1) should be [0%] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (1.5) should be [calc(-50px - 5%)] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (-0.3) should be [calc(130px + 13%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (0) should be [calc(100px + 10%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (0.5) should be [calc(50px + 5%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (1) should be [0%] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [10%] from add [100px] to add [-10%] at (1.5) should be [calc(-50px - 5%)] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (-0.3) should be [135px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (0) should be [150px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (0.5) should be [175px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (1) should be [200px] | PASS | PASS | PASS | PASS | PASS | PASS |
| Compositing CSS Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (1.5) should be [225px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (-0.3) should be [135px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (0) should be [150px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (0.5) should be [175px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (1) should be [200px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [50px] from add [100px] to replace [200px] at (1.5) should be [225px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [100px] to add [auto] at (-0.3) should be [200px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [100px] to add [auto] at (0) should be [200px] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <left> underlying [100px] from add [100px] to add [auto] at (0.5) should be [auto] | PASS | PASS | PASS | PASS | PASS | PASS |
| Compositing CSS Animations: property <left> underlying [100px] from add [100px] to add [auto] at (1) should be [auto] | PASS | PASS | PASS | PASS | PASS | PASS |
| Compositing CSS Animations: property <left> underlying [100px] from add [100px] to add [auto] at (1.5) should be [auto] | PASS | PASS | PASS | PASS | PASS | PASS |
| Compositing Web Animations: property <left> underlying [100px] from add [100px] to add [auto] at (-0.3) should be [200px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [100px] to add [auto] at (0) should be [200px] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [100px] to add [auto] at (0.5) should be [auto] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [100px] to add [auto] at (1) should be [auto] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <left> underlying [100px] from add [100px] to add [auto] at (1.5) should be [auto] | PASS | PASS | PASS | PASS | FAIL | FAIL |