Reference index / 컨트롤 상호작용 상태
Collapsed State
The state in which child content is folded away or closed.
When to use it
Trees and detail panels.
Caveats and distinctions
An element can have focus, selection, error, and other states simultaneously. Separate their meanings and visual priorities.
Implementation and classification
아이콘·상태 표시 / 컨트롤 상호작용 상태
Sources and verification status
https://www.w3.org/WAI/ARIA/apg/practices/keyboard-interface/
Source scope and verification status describe the existing catalog record. Publishing this page does not independently re-verify the latest library version, license, or production behavior.