materio-d8/build/webpack.config.dev.js

'use strict'

const webpack = require('webpack')
const { merge } = require('webpack-merge')
const baseConfig = require('./webpack.config.base')
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = merge(baseConfig, {
  mode: 'development',
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: '',
            },
          },
          'css-loader'
        ]
      }, {
        test: /\.scss$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: '',
            },
          },
          'css-loader',
          'sass-loader'
        ]
      }, {
        test: /\.(png|jpg|gif|svg)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 5000
            }
          }
        ]
      }
    ]
  },

  plugins: [
    // new webpack.HotModuleReplacementPlugin()
  ]
})