Browser support

Entry	Needs
Plain CSS (index.css, components.css and the rest)	Chrome and Edge 112, Firefox 117, Safari 16.5 or later (Baseline 2023)
Tailwind (tailwind.css and the rest)	Whatever Tailwind 4 supports, since it compiles the CSS
Vue components	Vue 3.5 or later, in the same browsers

The plain CSS uses native CSS nesting, which sets the floor. Everything else it uses is older: cascade layers, :where(), color-mix(), dvh and the translate property. Tailwind compiles the nesting away, so its users get Tailwind's own range instead.

A thin scrollbar (fp-scroll-thin) uses scrollbar-width and scrollbar-color, which some browsers ignore; they show their own scrollbar instead, and nothing breaks.