React · SwiftUI · agent guides
Skeleton
Where content will be before it arrives: blocks, lines and circles in the well's sunk look, shown after a beat with a soft sheen, swapped for the content on the settle spring.
Use it for
- A list, a card or a panel whose shape you know while its data loads (over about 300 ms).
Don't use it for
- Work in a control (use a spinner), a task with an end you can show (use progress), or content whose shape you cannot guess.