webpack.config.js

const path = require('path')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin')
const TerserPlugin = require('terser-webpack-plugin')

module.exports = {
  mode: 'development',
  entry: './src/ts/parallax-vanilla.ts',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.less$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'less-loader'],
      },
    ],
  },
  resolve: {
    extensions: ['.ts'],
  },
  output: {
    filename: 'parallax-vanilla.js',
    path: path.resolve(__dirname, 'dist/'),
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: 'parallax-vanilla.css',
      chunkFilename: 'parallax-vanilla.css',
    }),
    new OptimizeCssAssetsPlugin({
      assetNameRegExp: /\.css$/g,
      cssProcessorPluginOptions: {
        preset: ['default', { discardComments: { removeAll: true } }],
      },
      canPrint: true,
    }),
  ],
  devtool: 'source-map',
  optimization: {
    minimize: true,
    minimizer: [new TerserPlugin()],
  },
}