AI CSS Animations

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Fiber Optic Check

Five hairline fibers curve from a light source into the box. Checking sends a pulse down each one on a stagger, the ports flare as they arrive, and the box lights from its edge.

Also known as: fiber optic checkbox, light pulse checkbox, glowing lines checkbox, stroke dashoffset checkbox.

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Everything you see above is live. Basic and Pro include every premium piece, with the HTML and CSS ready to copy, plus the Tailwind version where there is one and Motions in Claude Code on Pro.

Customizing this snippet

  • Color: set --chk-color on the element or a parent. Currently previewing #3b82f6.
  • Size: set --chk-size. Every other dimension is in em, so the whole thing scales together. Currently previewing 24px.
  • Speed: change the duration on the transition or animation shorthand. 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.

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