There appears to have been a regression in the support for a native HTML checkbox's indeterminate IDL attribute, as recent testing has shown that it is returning the unchecked value (0) rather than the mixed value (2) when specified. Test case: https://scottaohara.github.io/tests/attr-indeterminate/ Reviewing with the accessibility checker, the native checkboxes are returning a value of 0 when given the indeterminate IDL attribute. I found these previous issues which reported on this bug, and were closed as fixed (hence assuming this is a regression). I am linking to them here in hopes that they might be somehow helpful in fixing this new instance of the mixed state not being properly exposed. https://bugs.webkit.org/show_bug.cgi?id=158876 https://bugs.webkit.org/show_bug.cgi?id=134492 Thanks
<rdar://problem/84269311>
Created attachment 464184 [details] Patch
Committed 258314@main (4160624d7f96): <https://commits.webkit.org/258314@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 464184 [details].