webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = (env, argv) => ({
  entry: ['./src/index.js', './src/chart-functionality.js', './src/horizontal-chart-tool-01.js', './src/horizontal-chart-tool-02.js', './src/progress-chart-tool.js', './src/negative-split-chart-tool.js', './src/combo-chart-tool.js', './src/stacked-chart-tool-01.js', './src/stacked-chart-tool-02.js', './src/vertical-chart-tool.js'],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  optimization: {
    minimizer: [
      new TerserPlugin(),
      new CssMinimizerPlugin(),
    ],
  },
  mode: 'production',
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
          },
        },
      },
      {
        test: /\.css$/,
        use: [
          argv.mode === 'development' ? 'style-loader' : MiniCssExtractPlugin.loader, 'css-loader',
        ],
      },
      {
        test: /\.(png|jpe?g|gif|svg)$/i,
        type: 'asset/resource',
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin(),
    new HtmlWebpackPlugin({
      template: './index.html',  // path to your HTML file
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
    }),
  ],
  devServer: {
    static: {
      directory: path.join(__dirname, 'dist'),
    },
    compress: true,
    port: 8000,
  },
});