259781 2023-08-03 09:15:38 -0700 form associated checkbox not removed from form data once checked 2025-03-27 11:36:40 -0700 1 1 1 Unclassified WebKit Forms Safari 17 Mac (Apple Silicon) macOS 13 RESOLVED CONFIGURATION CHANGED InRadar P2 Normal --- 154907 1 david webkit-unassigned akeerthi ashvayka cdumez david rniwa simon.fraser webkit-bug-importer wenson_hsieh oldest_to_newest 1969447 0 david 2023-08-03 09:15:38 -0700 Form associated custom element checkboxes are not removed from form data once unchecked. If checked, the name and value are present in form data as expected. Expected: Once unchecked, the checkbox is not part of the derived form data. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox#sect3 Actual: Once unchecked, the name and value are still part of the form data and not removed. Reproduction: https://stackblitz.com/edit/safari-form-associated-checkbox-bug?file=index.html 1970499 1 webkit-bug-importer 2023-08-10 09:16:13 -0700 <rdar://problem/113696919> 1970907 2 simon.fraser 2023-08-12 10:41:43 -0700 Did this work in older Safari versions? 1970910 3 david 2023-08-12 11:39:32 -0700 Good question. I have to check the repro in BrowserStack. If I remember correctly, formAssociated custom elements have just been shipped recently… 2106522 4 rniwa 2025-03-27 11:36:40 -0700 This seems to be working fine now.