WPT
wpt / css / css-fonts / animations / font-weight-composition.html
Spec: CSS Fonts ↗
Runs: Chrome 155.0.8041.0 (wpt@2c385f65e, 2026-09-04) | Firefox 157.0a1 (wpt@2c385f65e, 2026-09-04) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7825 (wpt@2c385f65e, 2026-09-04) | 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 | 20/20 | 18/20 | 18/20 | 18/20 | 9/20 | 1/20 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Compositing CSS Animations: property <font-weight> underlying [500] from add [100] to add [500] at (-0.3) should be [480] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [500] from add [100] to add [500] at (0) should be [600] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [500] from add [100] to add [500] at (0.5) should be [800] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [500] from add [100] to add [500] at (1) should be [1000] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [500] from add [100] to add [500] at (1.5) should be [1000] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <font-weight> underlying [500] from add [100] to add [500] at (-0.3) should be [480] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [500] from add [100] to add [500] at (0) should be [600] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [500] from add [100] to add [500] at (0.5) should be [800] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [500] from add [100] to add [500] at (1) should be [1000] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [500] from add [100] to add [500] at (1.5) should be [1000] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (-0.3) should be [889.75] | PASS | FAIL | FAIL | FAIL | FAIL | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (0) should be [800] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (0.5) should be [650] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing CSS Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (1) should be [500] | PASS | PASS | PASS | PASS | PASS | PASS |
| Compositing CSS Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (1.5) should be [350] | PASS | PASS | PASS | PASS | PASS | FAIL |
| Compositing Web Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (-0.3) should be [889.75] | PASS | FAIL | FAIL | FAIL | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (0) should be [800] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (0.5) should be [650] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (1) should be [500] | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Compositing Web Animations: property <font-weight> underlying [200] from add [600] to replace [500] at (1.5) should be [350] | PASS | PASS | PASS | PASS | FAIL | FAIL |