author

stark blog: https://shudong.wang

Next.js + Stylus

Import .styl files in your Next.js project

Installation

npm install --save @zeit/next-stylus stylus

or

yarn add @zeit/next-stylus stylus

Usage

The stylesheet is compiled to .next/static/css. Next.js will automatically add the css file to the HTML. In production a chunk hash is added so that styles are updated when a new version of the stylesheet is deployed.

Without CSS modules

Create a next.config.js in your project

// next.config.js
const withStylus = require('@zeit/next-stylus')
module.exports = withStylus({
  /* config options here */
})

Create a Stylus file styles.styl

$font-size = 50px
.example
  font-size $font-size

Create a page file pages/index.js

import "../styles.styl"

export default () => <div className="example">Hello World!</div>

With CSS modules

// next.config.js
const withStylus = require('@zeit/next-stylus')
module.exports = withStylus({
  cssModules: true
})

Create a Stylus file styles.styl

$font-size = 50px
.example
  font-size $font-size

Create a page file pages/index.js

import css from "../styles.styl"

export default () => <div className={css.example}>Hello World!</div>

With CSS modules and options

You can also pass a list of options to the css-loader by passing an object called cssLoaderOptions.

For instance, to enable locally scoped CSS modules, you can write:

// next.config.js
const withStylus = require('@zeit/next-stylus')
module.exports = withStylus({
  cssModules: true,
  cssLoaderOptions: {
    importLoaders: 1,
    localIdentName: "[local]___[hash:base64:5]",
  }
})

Create a CSS file styles.css

.example {
  font-size: 50px;
}

Create a page file pages/index.js that imports your stylesheet and uses the hashed class name from the stylesheet

import css from "../style.css"

const Component = props => {
  return (
    <div className={css.backdrop}>
      ...
    </div>
  )
}

export default Component

Your exported HTML will then reflect locally scoped CSS class names.

For a list of supported options, refer to the webpack css-loader README.

With Stylus loader options

You can pass options from Stylus

// next.config.js
const nib = require('nib')
const withStylus = require('@zeit/next-stylus')
module.exports = withStylus({
  stylusLoaderOptions: {
    use: [nib()]
  }
})

PostCSS plugins

For PostCSS support install PostStylus in your project.

Create a next.config.js in your project.

Pass the plugin and the options to Stylus via stylusLoaderOptions.

// next.config.js
const nib = require('nib')
const rupture = require('rupture')
const withStylus = require('@zeit/next-stylus')
const poststylus = require('poststylus')
const autoprefixer = require('autoprefixer')

module.exports = withStylus({
  stylusLoaderOptions: {
    use: [
      nib(),
      rupture(),
      poststylus([
        autoprefixer({ flexbox: 'no-2009' }),
        require('postcss-css-variables'),
      ]),
  }
})

Create a Stylus file styles.styl the Stylus here is using the css-variables postcss plugin.

:root 
  --some-color red


.example 
  /* red */
  color var(--some-color)

You can also pass a list of options to the postcss-loader by passing an object called postcssLoaderOptions.

For example, to pass theme env variables to postcss-loader, you can write:

// next.config.js
const withStylus = require('@zeit/next-stylus')
module.exports = withStylus({
  postcssLoaderOptions: {
    parser: true,
    config: {
      ctx: {
        theme: JSON.stringify(process.env.REACT_APP_THEME)
      }
    }
  }
})

Configuring Next.js

Optionally you can add your custom Next.js configuration as parameter

// next.config.js
const withStylus = require('@zeit/next-stylus')
module.exports = withStylus({
  webpack(config, options) {
    return config
  }
})