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Reuleaux Square Drill
A Reuleaux triangle turns inside a square while its centre orbits the other way, so it touches all four walls at every instant and sweeps an almost square hole. Contacts flash on the walls.
Also known as: reuleaux triangle animation, square hole drill, constant width shape loader, rotating triangle in square.
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Customizing this loader
- Color: set
--ldr-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--ldr-size. Every dimension in the snippet is derived from it. Currently previewing64px. - Speed: change the duration on the
animationshorthand. Delays on the children are relative, so they keep their rhythm. - Accessibility: the root carries
role="status"and anaria-labelso screen readers announce the wait. The reduced-motion rule at the end slows the animation for users who asked for less motion.