webpack.config.js

const path = require('path');
const webpack = require('webpack');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const mode = process.env.NODE_ENV || 'production';
const devtool = mode === 'development' ? 'cheap-module-source-map' : 'source-map';

const serverBuild = {
  mode,
  devtool,
  target: 'node',
  entry: './src/server/',
  output: {
    path: path.resolve(__dirname, './build/server/'),
    filename: 'index.js',
  },
  resolve: {
    extensions: ['.ts', '.tsx', '.js', '.json']
  },
  module: {
    rules: [
      { test: /\.tsx?$/, loader: 'ts-loader' },
      { enforce: "pre", test: /\.js$/, loader: "source-map-loader" },
      { test: /\.json$/, loader: 'json-loader' },
    ]
  }
};

const clientBuild = {
  mode,
  devtool,
  target: 'web',
  context: path.resolve(__dirname, './src/'),
  entry: {
    js: './client/index.tsx',
    css: './client/main.scss'
  },
  output: {
    path: path.resolve(__dirname, './build/client/'),
    filename: 'bundle.js',
  },
  resolve: {
    extensions: ['.ts', '.js', '.tsx', '.json', '.scss', '.css']
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        exclude: path.resolve(__dirname, 'node_modules/'),
        loader: 'ts-loader',
      },
      {
        enforce: "pre",
        test: /\.js$/,
        loader: 'source-map-loader',
      },
      {
        test: /\.json$/,
        loader: 'json-loader' ,
      },
      {
        test: /\.(scss|sass|css)$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
              includePaths: ['node_modules/bootstrap-sass/assets/stylesheets']
            }
          }
        ]
      },
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify(process.env.NODE_ENV)
      }
    }),
    new CopyWebpackPlugin([
      {
        from: './client/images/',
        to: 'images/',
      },
    ]),
    new MiniCssExtractPlugin({
      filename: "main.css",
    }),
  ],
};

module.exports = [clientBuild, serverBuild];