In a nutshell, all Next.js configurations are done via next.config.js. With Next.js 5, this became even easier.
Let's create an empty project for experiments:
$ npm init
$ npm install react react-dom
Let's add SASS support as an example:
$ npm install next node-sass @zeit/next-sass --save-dev
Enhance the scripts section of package.json:
// package.json
{
"scripts": {
"start": "next"
}
}
Next, we again have to create a custom document (the same as before):
// pages/_document.js
import Document, {Head, Main, NextScript} from 'next/document';
export default class MyDocument extends Document {
render() {
return (
<html>
<Head>
<title>NextJS Condensed</title>
<link rel="stylesheet" href="...
