WPT
wpt / css / cssom / getComputedStyle-pseudo.html
Spec: CSSOM ↗
Runs: Chrome 155.0.8039.0 (wpt@d0c38285b, 2026-09-03) | Firefox 157.0a1 (wpt@ed1909ed6, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@cc4d45aa0, 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 | 25/28 | 23/28 | 27/28 | 24/28 | 14/28 | 1/28 |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Resolution of width is correct when pseudo-element argument is ignored (due to no colon) | PASS | PASS | PASS | PASS | PASS | PASS |
| Resolution of width is correct when pseudo-element argument is invalid (due to a trailing token) | PASS | PASS | PASS | PASS | PASS | FAIL |
| Resolution of width is correct for ::before and ::after pseudo-elements (single-colon) | PASS | PASS | PASS | PASS | PASS | FAIL |
| Resolution of width is correct for ::before and ::after pseudo-elements (double-colon) | PASS | PASS | PASS | PASS | PASS | FAIL |
| Pseudo-elements can use the full range of CSS syntax | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Resolution of width is correct for ::before and ::after pseudo-elements of display: contents elements | PASS | PASS | PASS | PASS | PASS | FAIL |
| Resolution of nonexistent pseudo-element styles | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Resolution of pseudo-element styles in display: none elements | PASS | PASS | PASS | PASS | PASS | FAIL |
| Item-based blockification of pseudo-elements | PASS | PASS | PASS | PASS | PASS | FAIL |
| Item-based blockification of nonexistent pseudo-elements | PASS | FAIL | FAIL | PASS | FAIL | FAIL |
| display: contents on pseudo-elements | PASS | FAIL | PASS | PASS | PASS | FAIL |
| Dynamically change to display: contents on pseudo-elements | PASS | FAIL | PASS | PASS | PASS | FAIL |
| Unknown pseudo-elements | PASS | PASS | PASS | PASS | PASS | FAIL |
| CSSStyleDeclaration is immutable | PASS | PASS | PASS | PASS | PASS | FAIL |
| Unknown pseudo-element with a known identifier: backdrop | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Unknown pseudo-element with a known identifier: file-selector-button | FAIL | PASS | PASS | PASS | FAIL | FAIL |
| Unknown pseudo-element with a known identifier: grammar-error | PASS | PRECONDITION_FAILED | PASS | PRECONDITION_FAILED | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: highlight(name) | PASS | PASS | PASS | PRECONDITION_FAILED | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: marker | PASS | PASS | PASS | PASS | PASS | FAIL |
| Unknown pseudo-element with a known identifier: placeholder | FAIL | PASS | PASS | PASS | PASS | FAIL |
| Unknown pseudo-element with a known identifier: spelling-error | PASS | PRECONDITION_FAILED | PASS | PRECONDITION_FAILED | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: view-transition | PASS | PASS | PASS | PASS | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: view-transition-image-pair(name) | PASS | PASS | PASS | PASS | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: view-transition-group(name) | PASS | PASS | PASS | PASS | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: view-transition-old(name) | PASS | PASS | PASS | PASS | PRECONDITION_FAILED | SKIP |
| Unknown pseudo-element with a known identifier: view-transition-new(name) | PASS | PASS | PASS | PASS | PRECONDITION_FAILED | SKIP |
| ::file-selector-button resolves to the file input button element | PASS | PASS | PASS | PASS | FAIL | FAIL |
| Prefixed ::-webkit-file-upload-button does not resolve in getComputedStyle | FAIL | PASS | PASS | FAIL | PASS | FAIL |