WPT
This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.
wpt / css / css-position / overlay
Spec: CSS Positioned Layout ↗
Runs: Chrome 155.0.8038.0 (wpt@7addae031, 2026-09-02) | Firefox 157.0a1 (wpt@7addae031, 2026-09-02) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7884 (wpt@b1a7025f8, 2026-09-02) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)
Sort areas: alphabetical | by subtest count
| Area | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Total | 100.0%125/125 | 11.2%14/125 | 11.2%14/125 | 11.2%14/125 | 9.6%12/125 | 11.2%14/125 |
| animation | 100.0%88/88 | 0.0%0/88 | 0.0%0/88 | 0.0%0/88 | 0.0%0/88 | 0.0%0/88 |
| Test | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| author-overlay-top-layer-removal.html | PASS | PASS | PASS | PASS | PASS | FAIL |
| overlay-button-appearance.html | PASS | PASS | PASS | PASS | FAIL | PASS |
| overlay-computed.html | 6/6 | 0/6 | 0/6 | 0/6 | 0/6 | 0/6 |
| overlay-invalid.html | 6/6 | 6/6 | 6/6 | 6/6 | 6/6 | 6/6 |
| overlay-popover-backdrop-crash.html | PASS | PASS | PASS | PASS | TIMEOUT | PASS |
| overlay-transition-backdrop-entry.html | PASS | PASS | PASS | PASS | PASS | PASS |
| overlay-transition-backdrop.html | PASS | FAIL | FAIL | FAIL | FAIL | FAIL |
| overlay-transition-dialog.html | PASS | FAIL | FAIL | FAIL | FAIL | PASS |
| overlay-transition-finished.html | PASS | FAIL | FAIL | FAIL | TIMEOUT | FAIL |
| overlay-transition-in-rendering.html | PASS | FAIL | FAIL | FAIL | FAIL | FAIL |
| overlay-transition-out-rendering.html | PASS | FAIL | FAIL | FAIL | FAIL | FAIL |
| overlay-transition-property.html | 4/4 | 4/4 | 4/4 | 4/4 | 4/4 | 4/4 |
| overlay-transition.html | 2/2 | 0/2 | 0/2 | 0/2 | 0/2 | 0/2 |
| overlay-user-agent-rules.html | 4/4 | 0/4 | 0/4 | 0/4 | 0/4 | 0/4 |
| overlay-valid.html | 6/6 | 0/6 | 0/6 | 0/6 | 0/6 | 0/6 |