webpack.config.js

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

module.exports = {
  entry: './client/index.tsx',
  output: {
    publicPath: '/',
    path: path.resolve(__dirname, 'build/'),
    filename: 'bundle.js',
  },
  mode: 'development',
  module: {
    rules: [
      {
        // checks the extension
        test: /.(js|jsx)$/,
        // ignores these folders/directories
        exclude: /node_modules/,
        // if test passes, webpack uses the loaders specified
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
            plugins: ['@babel/plugin-syntax-jsx'],
          },
        },
      },
      {
        test: /\.tsx?$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              '@babel/preset-env',
              '@babel/preset-react',
              '@babel/preset-typescript',
            ],
            plugins: ['@babel/plugin-transform-react-jsx'],
          },
        },
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(scss)$/,
        use: [
          {
            loader: 'style-loader',
          },
          {
            loader: 'css-loader',
          },
          {
            loader: 'sass-loader',
          },
        ],
      },
      {
        test: /\.(png|jpe?g|gif|svg)$/i,
        use: 'file-loader',
      },
      {
        test: /\.html$/i,
        loader: 'html-loader',
      },
    ],
  },
  devServer: {
    // contentBase: path.join(__dirname, "client/"),
    compress: true,
    host: 'localhost',
    port: '8080',
    historyApiFallback: true,
    proxy: [{ '/': { target: 'http://localhost:3000', secure: false } }],
  },
  // set plugins
  plugins: [
    new HtmlWebpackPlugin({
      template: 'index.html',
      // favicon: 'test.png'
    }),
  ],
  resolve: { extensions: ['*', '.js', '.jsx', '.tsx', '.ts'] },
};