Installation

Requirements

The Node requirement covers the build plugin only, because that is the half which runs inside your bundler and reads your source. The runtime your components import has no Node dependency at all.

Tailwind CSS v4 is a hard requirement, and @tailwindcss/vite and @tailwindcss/postcss are the two surfaces the build plugin hooks into — one of them is what your Setup will use.

Install

Any of the four installs the same thing — one package with one runtime dependency, tailwind-merge — the same package a cn() helper is built on in essentially every Tailwind codebase. If your project already pulls it in, your bundler keeps the single shared copy and adding tailess costs 2.7 kB, not 11.1 kB.

Performance & size has the full breakdown of that number.

What the package ships

The runtime and both build plugins live in the same package on separate subpaths. There is no second install, and no tailess.config to create.

import { ss } from "tailess";        // the runtime — what your components importimport tailess from "tailess/vite";  // the Vite build plugin // "tailess/postcss"                 // the PostCSS build plugin