WPT
wpt / css / css-properties-values-api / register-property.html
Spec: CSS Properties and Values API ↗
Runs: Chrome 155.0.8040.0 (wpt@476394464, 2026-09-03) | Firefox 157.0a1 (wpt@476394464, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7825 (wpt@a1e944e7a, 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 | 6/6 | 6/6 | 6/6 | 6/6 | 5/6 | 1/6 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| registerProperty requires a Dictionary type | PASS | PASS | PASS | PASS | PASS | PASS |
| registerProperty requires a name matching <custom-property-name> | PASS | PASS | PASS | PASS | PASS | FAIL |
| registerProperty only allows omitting initialValue if syntax is '*' | PASS | PASS | PASS | PASS | PASS | FAIL |
| registerProperty fails for an already registered property | PASS | PASS | PASS | PASS | PASS | FAIL |
| registerProperty requires inherits | PASS | PASS | PASS | PASS | PASS | FAIL |
| Registering a property should not cause a transition | PASS | PASS | PASS | PASS | FAIL | FAIL |