What the standard says
Changing the setting of any user interface component does not automatically cause a change of context unless the user has been advised of the behavior before using the component.
Why it matters
Choosing an option in a dropdown should choose an option. If it also reloads the page, users who are still deciding get thrown out.
What a failure looks like
- failsA country `<select>` that submits on change.
- failsA checkbox that navigates immediately.
How to fix it
- doAdd a submit button, or tell the user in advance what the control will do.
How A11ySignal checks it
manual
No automated rule can judge this criterion, and we will not pretend otherwise. A clean scan does not mean 3.2.2 passes — it means nothing we can measure fails. This one needs a person.