Area overlay

Accessibility

Root: role="group" with a visually hidden regionLabel.
Error: shipped Alert at Error severity (role="alert").
While active, children are inert; focus is not trapped elsewhere on the page.
When active turns on while focus is inside the region, focus moves to the region root instead of the page body; when it turns off, focus returns to the control that had it.
No dismiss control; the host clears active when the condition ends.

Accessibility

Root: role="group" with a visually hidden regionLabel.
Error: shipped Alert at Error severity (role="alert").
While active, children are inert; focus is not trapped elsewhere on the page.
When active turns on while focus is inside the region, focus moves to the region root instead of the page body; when it turns off, focus returns to the control that had it.
No dismiss control; the host clears active when the condition ends.