What if a select box changes the rest of my form?
Question
If form content changes after selecting a value in a select box, is it necessary to explain in advance in text that the form will change and should that be read aloud? Or do I have to provide a submit button to initiate the change of context instead?
Answer
Yes, if interacting with a form input results in a change of context, then users must be made aware of the change before interacting with the component. However, the most accessible option would be providing a submit button so the change of context does not occur as soon as a form input is selected.
Also, if you provide instructions informing users of the change in context, then ensure they are programmatically related to the form with aria-describedby.
For more information regarding content changes on input, check out the Keyboard Navigation & Focus Management course from Accessible Web.
