webpack.config.js

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

module.exports = {
  entry: {
    app: path.join(__dirname, "demo/index.js")
  },
  /* devtool: 'inline-source-map',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'demo')
  }, */
  module: {
    rules: [
      {
        test: /\.(ts|tsx)$/,
        loader: "ts-loader",
        exclude: /node_modules/
      },
      {
        test: /\.(js|jsx)$/,
        use: "babel-loader",
        exclude: /node_modules/
      }, {
        test: /\.css$/,
        use: ["style-loader", "css-loader"]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, "demo/index.html"),
      filename: "./index.html"
    })
  ],
  resolve: {
    extensions: [".ts", ".tsx", ".js", ".jsx"]
  },
  devServer: {
    port: 3001,
    historyApiFallback: true,
    open: false
  }
};