Skeleton is a grey shape that pulses while content loads. It comes as a line, a circle or a block. The pulse holds still when the device's reduce motion setting is on. Screen readers read it as "Loading". See the web Skeleton page for the web version.
line fills the width and takes its height from size, from xs (the 8 step) to xl (the 24 step). circle takes its width and height from size, from xs (the 20 step) to xl (the 160 step). block fills the width at the 80 step tall. width and height override the size, in points or as a percentage.
delay waits that many milliseconds before the pulse starts. Give each skeleton in a group a longer delay to stagger them.
Skeleton does not take Flex props. Use style for margins.
