WPT
wpt / css / css-conditional / idlharness.html
Spec: CSS Conditional ↗
Runs: Chrome 155.0.8039.0 (wpt@a4fcd77aa, 2026-09-03) | Firefox 157.0a1 (wpt@cc4d45aa0, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a9df8 (wpt@47d833bbc, 2026-09-03) | 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 | 41/45 | 41/45 | 41/45 | 45/45 | 41/45 | 0/45 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| idl_test setup | PASS | PASS | PASS | PASS | PASS | — |
| idl_test validation | PASS | PASS | PASS | PASS | PASS | — |
| Partial interface CSSRule: original interface defined | PASS | PASS | PASS | PASS | PASS | — |
| Partial interface CSSRule: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| Partial namespace CSS: original namespace defined | PASS | PASS | PASS | PASS | PASS | — |
| Partial namespace CSS: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface: existence and properties of interface object | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface object length | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface object name | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface: existence and properties of interface prototype object | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface: existence and properties of interface prototype object's "constructor" property | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface: existence and properties of interface prototype object's @@unscopables property | PASS | PASS | PASS | PASS | PASS | — |
| CSSConditionRule interface: attribute conditionText | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: existence and properties of interface object | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface object length | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface object name | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: existence and properties of interface prototype object | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: existence and properties of interface prototype object's "constructor" property | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: existence and properties of interface prototype object's @@unscopables property | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: attribute media | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: attribute matches | FAIL | FAIL | FAIL | PASS | FAIL | — |
| CSSMediaRule must be primary interface of cssMediaRule | PASS | PASS | PASS | PASS | PASS | — |
| Stringification of cssMediaRule | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: cssMediaRule must inherit property "media" with the proper type | PASS | PASS | PASS | PASS | PASS | — |
| CSSMediaRule interface: cssMediaRule must inherit property "matches" with the proper type | FAIL | FAIL | FAIL | PASS | FAIL | — |
| CSSConditionRule interface: cssMediaRule must inherit property "conditionText" with the proper type | PASS | PASS | PASS | PASS | PASS | — |
| CSSRule interface: cssMediaRule must inherit property "SUPPORTS_RULE" with the proper type | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface: existence and properties of interface object | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface object length | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface object name | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface: existence and properties of interface prototype object | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface: existence and properties of interface prototype object's "constructor" property | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface: existence and properties of interface prototype object's @@unscopables property | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface: attribute matches | FAIL | FAIL | FAIL | PASS | FAIL | — |
| CSSSupportsRule must be primary interface of cssSupportsRule | PASS | PASS | PASS | PASS | PASS | — |
| Stringification of cssSupportsRule | PASS | PASS | PASS | PASS | PASS | — |
| CSSSupportsRule interface: cssSupportsRule must inherit property "matches" with the proper type | FAIL | FAIL | FAIL | PASS | FAIL | — |
| CSSConditionRule interface: cssSupportsRule must inherit property "conditionText" with the proper type | PASS | PASS | PASS | PASS | PASS | — |
| CSSRule interface: cssSupportsRule must inherit property "SUPPORTS_RULE" with the proper type | PASS | PASS | PASS | PASS | PASS | — |
| CSSRule interface: constant SUPPORTS_RULE on interface object | PASS | PASS | PASS | PASS | PASS | — |
| CSSRule interface: constant SUPPORTS_RULE on interface prototype object | PASS | PASS | PASS | PASS | PASS | — |
| CSSRule interface: cssRule must inherit property "SUPPORTS_RULE" with the proper type | PASS | PASS | PASS | PASS | PASS | — |
| CSS namespace: operation escape(CSSOMString) | PASS | PASS | PASS | PASS | PASS | — |
| CSS namespace: operation supports(CSSOMString, CSSOMString) | PASS | PASS | PASS | PASS | PASS | — |
| CSS namespace: operation supports(CSSOMString) | PASS | PASS | PASS | PASS | PASS | — |
| Uncaught JS error | — | — | — | — | — | FAIL |