UnoCSS
ELI5 — The Vibe Check
UnoCSS is like Tailwind on steroids. It's an atomic CSS engine that generates utilities on-demand and can mimic Tailwind, Windi, Bootstrap, or whatever preset you want. It's insanely fast because it skips parsing CSS entirely. The speed demon of utility frameworks.
Real Talk
UnoCSS is an instant, on-demand atomic CSS engine that generates utility classes at build time. It's engine-first with a preset system that can emulate Tailwind CSS, Windi CSS, or custom utility patterns, offering superior build performance through its pure string-matching approach.
When You'll Hear This
"UnoCSS built our styles in 3ms, Tailwind took 300ms" / "The preset system lets you mix utility frameworks"
Related Terms
Atomic CSS
Atomic CSS is the idea that every CSS class should do exactly one thing. Instead of .card-header, you have .p-4 .font-bold .text-blue-500.
Autoprefixer
Autoprefixer is the robot that adds -webkit-, -moz-, and all those annoying vendor prefixes to your CSS so you don't have to.
PostCSS
PostCSS is a CSS processor that does... whatever its plugins tell it to do. It's like an empty pipeline where you plug in transformations. Autoprefixer?