webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { merge } = require('webpack-merge');

const baseConfig = {
  mode: 'development',
  entry: './src/ts/controllers/controller.ts',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.s[ac]ss$/i,
        use: ['style-loader', 'css-loader', 'postcss-loader', 'sass-loader'],
      },
    ],
  },
  resolve: {
    extensions: ['.ts', '.js'],
  },
  plugins: [
    new HtmlWebpackPlugin({
      minimize: true,
      template: './index.html',
      title: 'RS Selectors',
      favicon: './src/img/favicon.png',
    }),
  ],
};

module.exports = ({ mode }) => {
  const isProductionMode = mode === 'prod';
  const envConfig = isProductionMode
    ? require('./webpack.prod.config.js')
    : require('./webpack.dev.config');

  return merge(baseConfig, envConfig);
};