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Inchworm Tab Indicator
Underline tabs whose indicator inches over. Its leading edge darts to the new tab, the trailing edge follows on a slower curve, so it stretches and then contracts, either way.
Also known as: animated tab underline css, elastic tab indicator, vercel tabs underline animation, sliding tab underline radio.
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Customizing this snippet
- Color: set
--rad-coloron the element or a parent. Currently previewing#3b82f6. - Size: set
--rad-size. Every other dimension is inem, so the whole thing scales together. Currently previewing18px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.