Skeleton list

Keyboard

• Nothing inside is focusable; there is no tab stop between the top bar and whatever follows the list.
• While the skeleton is up, the region the user was in has no interactive content — a host that took focus away must give it back when the rows arrive.

ARIA

• The wrapper sets aria-busy="true", which is the one signal the component makes. It tells assistive technology that this region is being updated rather than that it is empty.
• No role="status" and no live region: a first load is a navigation the user initiated, not an event to interrupt them with.
• The rows carry no roles — they are not list items and must not be announced as such, because they stand for nothing yet.
• When the data lands, remove the whole block. Leaving aria-busy="true" on a filled region is worse than never setting it.

Focus

• No focusable descendants and no focus ring.

Contrast

• The bars and circles come from the surface scale and are intentionally low-contrast; they represent absent content, so AA text thresholds do not apply.

Known limits

• The shimmer ignores prefers-reduced-motion.
• The switch from busy to ready is not announced; a screen-reader user has to go back and re-read the region to notice the rows.
• aria-busy lives on the wrapper only — a host that renders the skeleton next to real content, rather than in place of it, gives an inaccurate picture of what is loading.