webpack.config.js

const path = require("path");
const autoprefixer = require('autoprefixer');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');

const postcss = {
  loader: 'postcss-loader',
  options: {
    plugins() { return [autoprefixer({ browsers: 'last 3 versions' })]; }
  }
};

module.exports = {
  entry: './src/main.js',
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      },
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              hmr: process.env.NODE_ENV === 'development',
              reloadAll: true
            },
          },
          'css-loader',
          postcss,
          'sass-loader',
        ],
      },
    ]
  },
  devServer: {
    port: 3000,
    clientLogLevel: "error",
    stats: "errors-only"
  },
  optimization: {
    minimizer: [
      new TerserPlugin(),
      new OptimizeCSSAssetsPlugin()
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      minify: { collapseWhitespace: true },
      template: './src/index.html',
      filename: 'index.html',
      favicon: './assets/icon-play.png'
      }),
    new MiniCssExtractPlugin({
      filename: '[name].css'
    }),
    new webpack.ProvidePlugin({
      $: "jquery",
      jQuery: "jquery"
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NamedModulesPlugin()
  ]
};