[Select][Autosuggest] Use of aria-polite to indicate changes on the list

[aweell]

The current problem

Currently, in our select with filter and autosuggest components (both implemented as a combobox), there's no way to know when the list elements have been changed due to user interaction with the input.

An accessible solution

This is solved using aria-live regions in the options dialog where assistive technologies will announce dynamic changes in the content.

Entering in detail, we will need to discuss if those regions should be described with:

• aria-live="polite"
• aria-live="assertive"

Depending on if we think that the changes on the dialog options data are critical and should be announced as soon as is updated or we should wait until the user is idle.

Related

https://uxmastery.com/anatomy-of-an-accessible-auto-suggest/
https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Live_Regions