WPT
wpt / shadow-dom / slotchange-event.html
Spec: DOM ↗
Runs: Chrome 155.0.8039.0 (wpt@2b4dfe72c, 2026-09-03) | Firefox 157.0a1 (wpt@2b4dfe72c, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@ed1909ed6, 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 | 32/32 | 32/32 | 32/32 | 32/32 | 28/32 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| slotchange event must fire on a default slot element inside an open shadow root in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a default slot element inside a closed shadow root in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a default slot element inside an open shadow root not in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a default slot element inside a closed shadow root not in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a named slot element insidean open shadow root in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a named slot element insidea closed shadow root in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a named slot element insidean open shadow root not in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a named slot element insidea closed shadow root not in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must not fire on a slot element inside an open shadow root in a document when another slot's assigned nodes change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must not fire on a slot element inside a closed shadow root in a document when another slot's assigned nodes change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must not fire on a slot element inside an open shadow root not in a document when another slot's assigned nodes change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must not fire on a slot element inside a closed shadow root not in a document when another slot's assigned nodes change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element when a shadow host has a slottable and the slot was inserted and must not fire when the shadow host was mutated after the slot was removed inside an open shadow root in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element when a shadow host has a slottable and the slot was inserted and must not fire when the shadow host was mutated after the slot was removed inside a closed shadow root in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element when a shadow host has a slottable and the slot was inserted and must not fire when the shadow host was mutated after the slot was removed inside an open shadow root not in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element when a shadow host has a slottable and the slot was inserted and must not fire when the shadow host was mutated after the slot was removed inside a closed shadow root not in a document | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside an open shadow root in a document even if the slot was removed immediately after the assigned nodes were mutated | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside a closed shadow root in a document even if the slot was removed immediately after the assigned nodes were mutated | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside an open shadow root not in a document even if the slot was removed immediately after the assigned nodes were mutated | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside a closed shadow root not in a document even if the slot was removed immediately after the assigned nodes were mutated | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside an open shadow root in a document when innerHTML modifies the children of the shadow host | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside a closed shadow root in a document when innerHTML modifies the children of the shadow host | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside an open shadow root not in a document when innerHTML modifies the children of the shadow host | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside a closed shadow root not in a document when innerHTML modifies the children of the shadow host | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside an open shadow root in a document when nested slots's contents change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside a closed shadow root in a document when nested slots's contents change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside an open shadow root not in a document when nested slots's contents change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire on a slot element inside a closed shadow root not in a document when nested slots's contents change | PASS | PASS | PASS | PASS | PASS | — |
| slotchange event must fire at the end of current microtask after mutation observers are invoked inside an open shadow root in a document when slots's contents change | PASS | PASS | PASS | PASS | FAIL | — |
| slotchange event must fire at the end of current microtask after mutation observers are invoked inside a closed shadow root in a document when slots's contents change | PASS | PASS | PASS | PASS | FAIL | — |
| slotchange event must fire at the end of current microtask after mutation observers are invoked inside an open shadow root not in a document when slots's contents change | PASS | PASS | PASS | PASS | FAIL | — |
| slotchange event must fire at the end of current microtask after mutation observers are invoked inside a closed shadow root not in a document when slots's contents change | PASS | PASS | PASS | PASS | FAIL | — |