webpack.config.js

const path = require('path');
const HTMLWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

module.exports = {
  context: path.resolve(__dirname, 'src'),
  mode: 'development',
  entry: {
    main: ['@babel/polyfill', './js/main.js'],
  },
  output: {
    filename: '[name][contenthash].js',
    path: path.resolve(__dirname, 'build'),
  },
  devServer: {
    static: path.resolve(__dirname, 'dist'),
    port: 8080,
    hot: false,
  },
  plugins: [
    new HTMLWebpackPlugin({
      template: './index.html',
    }),
    new CleanWebpackPlugin(),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: path.resolve(__dirname, 'src/icon.ico'),
          to: path.resolve(__dirname, 'build'),
        },
        {
          from: path.resolve(__dirname, 'src/click.mp3'),
          to: path.resolve(__dirname, 'build'),
        },
      ],
    }),
    new MiniCssExtractPlugin({
      filename: '[name][contenthash].css',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.(scss)$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          {
            loader: 'css-loader',
          },
          {
            loader: 'postcss-loader',
            options: {
              postcssOptions: {
                plugins: () => [require('autoprefixer')],
              },
            },
          },
          {
            loader: 'sass-loader',
          },
        ],
      },
      {
        test: /\.m?js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
          },
        },
      },
    ],
  },
};