webpack.react.config.js

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

module.exports = {
  resolve: {
    extensions: ['.tsx', '.ts', '.js'],
    mainFields: ['main', 'module', 'browser'],
  },
  entry: './src/app.tsx',
  target: 'electron-renderer',
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.(js|ts|tsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            plugins: ['@babel/plugin-proposal-class-properties'],
          },
        },
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      },
    ],
  },
  devServer: {
    contentBase: path.join(__dirname, '../dist/renderer'),
    historyApiFallback: true,
    compress: true,
    hot: true,
    port: 4000,
    publicPath: '/',
  },
  output: {
    path: path.resolve(__dirname, '../dist/renderer'),
    filename: 'js/[name].js',
    publicPath: './',
  },
  plugins: [new HtmlWebpackPlugin()],
};