A disclosure is a collapsible element. When using keyboard navigation and a screen reader, the element will be announced as collapsible, giving the user the option to expand it and navigate inside, or skip it and go to the next item. This can help with using a complex menu.
WAI ARIA pattern
https://www.w3.org/WAI/ARIA/apg/patterns/disclosure/examples/disclosure-navigation-hybrid/
Issues
Module page
Stability
Secure