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Frost Creep Border
On hover or focus, ice crystals grow inward from each corner one after another and a frosted rim closes around the button; when the pointer leaves, the frost shrinks back and melts away faster.
Also known as: frost border css, ice hover effect, frozen button css, winter border animation.
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Customizing this snippet
- Color: set
--bdr-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--bdr-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - 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.