WPT
wpt / css / css-pseudo / idlharness.html
Spec: CSS Pseudo-Elements ↗
Runs: Chrome 155.0.8042.0 (wpt@0a3996025, 2026-09-04) | Firefox 157.0a1 (wpt@972e0e100, 2026-09-04) | Safari 251 preview (wpt@972e0e100, 2026-09-04) | Ladybird 1.0-3fd2d (wpt@c29bd2aee, 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 | 19/29 | 8/29 | 8/29 | 8/29 | 8/29 | 0/29 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| idl_test setup | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| idl_test validation | PASS | PASS | PASS | PASS | PASS | — |
| Partial interface Element: original interface defined | PASS | PASS | PASS | PASS | PASS | — |
| Partial interface Element: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| Partial interface Element[2]: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| Element includes ParentNode: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| Element includes NonDocumentTypeChildNode: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| Element includes ChildNode: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| Element includes Slottable: member names are unique | PASS | PASS | PASS | PASS | PASS | — |
| CSSPseudoElement interface: existence and properties of interface object | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface object length | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface object name | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: existence and properties of interface prototype object | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: existence and properties of interface prototype object's "constructor" property | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: existence and properties of interface prototype object's @@unscopables property | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: attribute type | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: attribute element | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: attribute parent | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: attribute selectorText | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: operation pseudo(CSSOMString) | PASS | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement must be primary interface of beforeElements.item(0) | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| Stringification of beforeElements.item(0) | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: beforeElements.item(0) must inherit property "type" with the proper type | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: beforeElements.item(0) must inherit property "element" with the proper type | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: beforeElements.item(0) must inherit property "parent" with the proper type | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: beforeElements.item(0) must inherit property "selectorText" with the proper type | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: beforeElements.item(0) must inherit property "pseudo(CSSOMString)" with the proper type | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| CSSPseudoElement interface: calling pseudo(CSSOMString) on beforeElements.item(0) with too few arguments must throw TypeError | FAIL | FAIL | FAIL | FAIL | FAIL | — |
| Element interface: operation pseudo(CSSOMString) | PASS | FAIL | FAIL | FAIL | FAIL | — |
| Uncaught JS error | — | — | — | — | — | FAIL |