Bug 259781

Summary:	form associated checkbox not removed from form data once checked
Product:	WebKit	Reporter:	David Enke <david>
Component:	Forms	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	akeerthi, ashvayka, cdumez, david, rniwa, simon.fraser, webkit-bug-importer, wenson_hsieh
Priority:	P2	Keywords:	InRadar
Version:	Safari 17
Hardware:	Mac (Apple Silicon)
OS:	macOS 13
Bug Depends on:
Bug Blocks:	154907

Description David Enke 2023-08-03 09:15:38 PDT

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

Comment 1 Radar WebKit Bug Importer 2023-08-10 09:16:13 PDT

<rdar://problem/113696919>

Comment 2 Simon Fraser (smfr) 2023-08-12 10:41:43 PDT

Did this work in older Safari versions?

Comment 3 David Enke 2023-08-12 11:39:32 PDT

Good question. I have to check the repro in BrowserStack.
If I remember correctly, formAssociated custom elements have just been shipped recently…