Premium
A feature flag row. Switching it on lights Development, Preview and Production in turn: each dot pulses once, its label tints and a hairline draws to the next. Off retracts them in reverse.
Also known as: feature flag toggle, feature flag ui css, environment toggle switch, deploy rollout animation.
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.
--tgl-color on the element or a parent.
Currently previewing #3b82f6.--tgl-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.