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Fingerprint Passkey Button
A Sign in with passkey button: hold it and the fingerprint ridges light up one by one from the core outward, then the print becomes a check. Let go early and the ridges unwind.
Also known as: passkey sign in button, fingerprint button animation, hold to sign in button, biometric login button css.
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Customizing this snippet
- Color: set
--btn-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--btn-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.