webpack.common.js

const path = require("path");
const ForkTsCheckerWebpackPlugin = require( 'fork-ts-checker-webpack-plugin' );

module.exports = {
  mode: "development",
  entry: "./src/render/index.js",
  devtool: "source-map",
  target: "electron-renderer",
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [
              [
                "@babel/preset-env",
                {
                  targets: {
                    esmodules: true,
                  },
                },
              ],
              "@babel/preset-react",
            ],
          },
        },
      },
      /*{
        test: [/\.css$/i],
        use: {
          loader: "css-loader",
          options: {
            import: true,
          },
        },
      },*/
      {
        test: [/\.(ts|tsx)$/],
        exclude: /node_modules/,
        use: {
          loader: "ts-loader",
          options: {
            transpileOnly: true,
          },
        },
      },
    ],
  },
  module: {
    rules: [
        {
            test: path.join(__dirname, '.'),
            exclude: /(node_modules)/,
            loader: 'babel-loader',
            options: {
                presets: ['@babel/preset-env',
                          '@babel/react',{
                          'plugins': ['@babel/plugin-proposal-class-properties']}]
            }
        }
    ]
},
  // plugins
  plugins: [
    new ForkTsCheckerWebpackPlugin(), // run TSC on a separate thread
  ],
  resolve: {
    extensions: [".js", ".jsx", ".ts", ".tsx"],
  },
  output: {
    filename: "app.js",
    path: path.resolve(__dirname, "build", "render"),
  },
};