W3C Validator errors caused by form_build_id hidden field having autocomplete attribute

Hi @rmpereira I have understood the issue but can you please tell me where exactly the code change is required? So that I can looked into it ?

Hi, in my opinion, we should revert and remove the addition of the 'autocomplete' attribute in the FormBuilder.php file to be W3C valid again: https://git.drupalcode.org/project/drupal/-/merge_requests/2941/diffs

However, I'm not sure if this is THE right solution as we might encounter problems again on Firefox as mentioned in issue #349588. For the latter, I don't fully understand the problem.

If this problem was discovered on a version of Drupal that is not 11.x, add that information in the issue summary and leave the version at 11.x. In Drupal core changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to the Core change policies → . Also mentioned on the version → section of the list of issue fields documentation.

Restoring issue template so the work here can be tracked.

Tested a patch version of the MR on Drupal 10. It works nicely. I saw no Problem in Firefox (latest, 140.0.2 version on macOS).

I'd like someone to test the scenario described in the comment being removed ? Not breaking forms is more important than being valid HTML in this case.