Reference index / 모달·오버레이·패널
Scrim / Backdrop
A translucent layer that dims the background behind a dialog.
When to use it
Specifying modal, overlay, and panel interfaces and interactions.
Caveats and distinctions
Detailed behavior can differ across platforms and design systems despite identical names. Design keyboard, assistive-technology, and error behavior together.
Implementation and classification
UI·UX / 모달·오버레이·패널
Sources and verification status
https://www.w3.org/WAI/ARIA/apg/patterns/
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