webpack.config.js

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

module.exports = {
  mode: process.env.NODE_ENV,
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './public/index.html',
      favicon: './public/favicon.ico',
    }),
    new SourceMapDevToolPlugin({ filename: '[file].map' }), // plugin eliminates the error of "ERR_UNKNOWN_URL_SCHEME"
  ],
  module: {
    rules: [
      {
        test: /\.jsx?/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        options: {
          presets: ['@babel/preset-env', '@babel/preset-react'],
          plugins: [
            '@babel/plugin-transform-runtime',
            '@babel/transform-async-to-generator',
          ],
        },
      },
      {
        test: /.(css|scss)$/,
        exclude: /node_modules/,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
      {
        test: /\.png|svg|jpg|gif$/,
        use: ['file-loader'],
      },
      {
        test: /\.js$/,
        enforce: 'pre',
        use: ['source-map-loader'],
      },
      {
        test: /\.(ts|tsx)$/,
        exclude: /node_modules/,
        use: ['ts-loader'],
      },
    ],
  },
  resolve: {
    extensions: ['.ts', '.tsx', '.jsx', '.js', '.json'],
  },
  devServer: {
    static: {
      directory: path.resolve(__dirname, 'build'),
      publicPath: '/build',
    },
    port: 8081, // host client side files on 8080
    compress: true,
    hot: true,
    liveReload: true,
    historyApiFallback: true, // fall back to entry path every time it loads for react router
    proxy: {
      '/**': 'http://localhost:3000/', // listening for all requests that come in at port 3000
    },
  },
};