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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.
Premium
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.
--chk-color on the element or a parent.
Currently previewing #3b82f6.--chk-size. Every other dimension is in
em, so the whole thing scales together. Currently previewing 24px.transition or animation
shorthand. Staggered delays are relative, so they keep their rhythm.