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 / CSS2 / stacking-context
Spec: CSS ↗
Runs: Chrome 155.0.8043.0 (wpt@21420d4c0, 2026-09-05) | Firefox 157.0a1 (wpt@9b965429d, 2026-09-05) | Safari 251 preview (wpt@c29bd2aee, 2026-09-05) | Ladybird 1.0-4912a (wpt@b09f5cdca, 2026-09-05) | Servo Servo 0.6 (wpt@2c385f65e, 2026-09-04) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
Sort areas: alphabetical | by subtest count
| Area | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Total | 100.0%7/7 | 100.0%7/7 | 100.0%7/7 | 100.0%7/7 | 100.0%7/7 | 57.1%4/7 |
| Test | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| composite-change-after-scroll-preserves-stacking-order.html | PASS | PASS | PASS | PASS | PASS | PASS |
| opacity-affects-block-in-inline.html | PASS | PASS | PASS | PASS | PASS | PASS |
| opacity-change-parent-stacking-context.html | PASS | PASS | PASS | PASS | PASS | FAIL |
| opacity-change-twice-stacking-context.html | PASS | PASS | PASS | PASS | PASS | FAIL |
| opacity-transition-change-parent-stacking-context.html | PASS | PASS | PASS | PASS | PASS | FAIL |
| root-element-creates-stacking-context.html | PASS | PASS | PASS | PASS | PASS | PASS |
| zindex-affects-block-in-inline.html | PASS | PASS | PASS | PASS | PASS | PASS |