Next.js

// TODO: link to examples

Getting Started with UnoCSS and Next.js.

Setup

Installation

pnpm

pnpm add -D unocss @unocss/webpack

yarn

yarn add -D unocss @unocss/webpack

npm

npm install -D unocss @unocss/webpack

Configuration

Create uno.config.ts at the root of your project.

uno.config.ts

import {
  defineConfig,
  presetAttributify,
  presetIcons,
  presetUno,
  presetWebFonts
} from 'unocss'

export default defineConfig({
  presets: [
    presetUno(),
    // ...
  ],
})

Add plugin

Then add UnoCSS as a plugin to webpack through your next.config.js.

// next.config.js
const UnoCSS = require('@unocss/webpack').default

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  webpack: (config) => {
    config.plugins.push(
      UnoCSS(),
    )
    return config
  },
}

module.exports = nextConfig

Import stylesheets

Then import uno.css in _app.tsx.

import type { AppProps } from 'next/app'
// _app.tsx
import '@unocss/reset/tailwind.css'

import 'uno.css'

function MyApp({ Component, pageProps }: AppProps) {
  return <Component {...pageProps} />
}

export default MyApp

Usage

Style your components with unocss!

/* index.tsx */
const Home: NextPage = () => {
  return (
    <>
      <main className="py-20 px-12 text-center flex flex-col items-center gap-20px">
        <span text="blue 5xl hover:red" cursor="default">Nextjs</span>
        <div className="i-carbon-car inline-block" text="4xl" />
        <button className="btn w-10rem">Button</button>
      </main>
    </>
  )
}

Hot Module Reload

To support HMR you have to opt-out of webpack's caching.

// next.config.js
const nextConfig = {
  reactStrictMode: true,
  webpack: (config) => {
+   config.cache = false
    config.plugins.push(UnoCSS())
    return config
  }
}

Troubleshooting

Error concerning virtual module

Error: ENOENT: no such file or directory, open '.../_virtual_/__uno.css'

Try deleting the .next directory and restart the dev server.

Other

You might need to bump your target up to at least es2015 in your tsconfig.json to build your project.

Files with .js extension are not supported by default. Change your file extensions to .jsx or try to include js files in your config with include: /\.js$/. Learn more.