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wpt / dom / events / Event-dispatch-single-activation-behavior.html

Spec: DOM ↗

Runs: Chrome 155.0.8041.0 (wpt@4fbf9ef4d, 2026-09-04) | Firefox 157.0a1 (wpt@4fbf9ef4d, 2026-09-04) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-a7825 (wpt@4fbf9ef4d, 2026-09-04) | 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

ChromeFirefoxSafariLadybirdServoBlitz
Total120/132123/132120/132124/132124/132NOT RUN
SubtestChromeFirefoxSafariLadybirdServoBlitz
When clicking child <INPUT type=checkbox></INPUT> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=checkbox></INPUT> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <INPUT type=radio></INPUT> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=submit></INPUT></FORM> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=image></INPUT></FORM> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><INPUT type=reset></INPUT></FORM> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=submit></BUTTON></FORM> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSFAILFAIL
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <FORM><BUTTON type=reset></BUTTON></FORM> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <A></A> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <AREA></AREA> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <DETAILS><SUMMARY></SUMMARY></DETAILS> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSFAILPASSPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSFAILPASSPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <A></A>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <AREA></AREA>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL> of parent <LABEL><BUTTON type=button></BUTTON></LABEL>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <INPUT type=checkbox></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <INPUT type=radio></INPUT>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <FORM><INPUT type=submit></INPUT></FORM>, only child should be activated.FAILPASSFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <FORM><INPUT type=image></INPUT></FORM>, only child should be activated.FAILPASSFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <FORM><INPUT type=reset></INPUT></FORM>, only child should be activated.FAILPASSFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <FORM><BUTTON type=submit></BUTTON></FORM>, only child should be activated.FAILPASSFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <FORM><BUTTON type=reset></BUTTON></FORM>, only child should be activated.FAILPASSFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <A></A>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <AREA></AREA>, only child should be activated.FAILFAILFAILPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <DETAILS><SUMMARY></SUMMARY></DETAILS>, only child should be activated.PASSPASSPASSPASSPASS
When clicking child <LABEL><BUTTON type=button></BUTTON></LABEL> of parent <LABEL><INPUT type=checkbox></INPUT><SPAN></SPAN></LABEL>, only child should be activated.PASSPASSPASSPASSPASS