webpack.config.js

const HtmlWebPackPlugin = require("html-webpack-plugin")
const MiniCssExtractPlugin = require("mini-css-extract-plugin")
const webpack = require('webpack');

module.exports = {
  module: {
    rules: [
      {
        test: /\.js$|jsx/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: "html-loader",
            options: { minimize: true }
          }
        ]
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"]
      },    
      {
        test: /\.(scss)$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader'
          },
          {
            loader: 'postcss-loader',
            options: {
              plugins: function () {
                return [
                  require('autoprefixer')
                ];
              }
            }
          },
          {
            loader: 'sass-loader'
          }
        ]
      },
      {
          test: /\.(eot|ttf|woff|woff2)$/,
          loader: 'file-loader?name=fonts/[name].[ext]'
      },
      {
          test: /\.(jpe?g|png|gif|svg)$/i, 
          loader: "file-loader?name=img/[name].[ext]"
      }
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: "./src/index.html",
      filename: "./index.html"
    }),
    new MiniCssExtractPlugin({
      filename: "[name].css",
      chunkFilename: "[id].css"
    })
  ]
};