WPT
wpt / resize-observer / notify.html
Spec: Resize Observer ↗
Runs: Chrome 155.0.8040.0 (wpt@476394464, 2026-09-03) | Firefox 157.0a1 (wpt@476394464, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7825 (wpt@a1e944e7a, 2026-09-03) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | 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 | 15/15 | 15/15 | 15/15 | 11/15 | 15/15 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| ResizeObserver implemented | PASS | PASS | PASS | PASS | PASS | — |
| guard | PASS | PASS | PASS | PASS | PASS | — |
| test0: notification ordering | PASS | PASS | PASS | PASS | PASS | — |
| test1: display:none triggers notification | PASS | PASS | PASS | PASS | PASS | — |
| test2: remove/appendChild trigger notification | PASS | PASS | PASS | PASS | PASS | — |
| test3: dimensions match | PASS | PASS | PASS | FAIL | PASS | — |
| test4: transform do not cause notifications | PASS | PASS | PASS | PASS | PASS | — |
| test5: moving an element does not trigger notifications | PASS | PASS | PASS | PASS | PASS | — |
| test6: inline element notifies once with 0x0. | PASS | PASS | PASS | FAIL | PASS | — |
| test7: unobserve inside notify callback | PASS | PASS | PASS | PASS | PASS | — |
| test8: observe inside notify callback | PASS | PASS | PASS | PASS | PASS | — |
| test9: disconnect inside notify callback | PASS | PASS | PASS | PASS | PASS | — |
| test10: element notifies when parent removed | PASS | PASS | PASS | PASS | PASS | — |
| test11: display:none element should be notified | PASS | PASS | PASS | FAIL | PASS | — |
| test12: element sized 0x0 should be notified | PASS | PASS | PASS | FAIL | PASS | — |