Reference index / 컨트롤 상호작용 상태
Mixed State
The state in which only some associated child items are selected.
When to use it
Select-all checkboxes.
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.