WPT
wpt / dom / events / AddEventListenerOptions-once.any.html
Spec: DOM ↗
Runs: Chrome 155.0.8042.0 (wpt@a1ecd0c09, 2026-09-04) | Firefox 157.0a1 (wpt@e23cee339, 2026-09-04) | Safari 251 preview (wpt@e7122b73f, 2026-09-04) | Ladybird 1.0-52f0f (wpt@0588f3896, 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 | 4/4 | 4/4 | 4/4 | 4/4 | 4/4 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| Once listener should be invoked only once | PASS | PASS | PASS | PASS | PASS | — |
| Once listener should be invoked only once even if the event is nested | PASS | PASS | PASS | PASS | PASS | — |
| Once listener should be added / removed like normal listeners | PASS | PASS | PASS | PASS | PASS | — |
| Multiple once listeners should be invoked even if the stopImmediatePropagation is set | PASS | PASS | PASS | PASS | PASS | — |