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I try to use webpack 4 for a - what initially seemed to me - simple task: generate all the possible CSS a SCSS framework could potentially produce and output it as a nicely formatted CSS file. While a gulp setup did the job in 5 minutes:.

// Gulp
let gulp = require('gulp')
let gulpScss = require('gulp-sass')
let postcss = require("gulp-postcss")
let autoprefixer = require("autoprefixer")

function style() 
 return (
 gulp
 .src('src/scss/main.scss')
 .pipe(gulpScss())
 .on("error", gulpScss.logError)
 .pipe(postcss([autoprefixer()]))
 .pipe(gulp.dest('dist'))
 );

exports.style = style;

.. .I am still struggling with webpack 4:

// webpack 4
const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require("extract-text-webpack-plugin")
const autoprefixer = require('autoprefixer')

const isDevelopment = process.env.NODE_ENV !== 'production'
const rootPath = path.resolve(__dirname, '../')

module.exports = 
 entry: bundle: './src/app.js' ,
 output: [...] ,
 module: 
 rules: [ 
 test: /.js$/,
 [...]
 , 
 test: /.(scss
 ]
 ,
 plugins: [
 new HtmlWebpackPlugin( [...] ),
 new ExtractTextPlugin("inuitcss.css")
 ]


// NPM
"build": "webpack -p --progress --mode production --config ./config/build.js"

I also worked through some posts here on stackoverflow, namely this one:
Sass loader and webpack 4
and others, but they all use mini-css-extract-plugin or the extract-text-plugin.

The thing is: I DO get results, this is not the problem; the problem is, that they are all minified.

My question:
Is it at all possible to generate non-minified CSS output with webpack 4, possibly with such nice configuration options like "nested" etc?