webpack.config.js

const path = require('path');
const webpack = require('webpack');

module.exports = {
	entry: {
		index: './src/Index.tsx'
	},

	// Enable sourcemaps for debugging webpack's output.
	devtool: "source-map",

	resolve: {
		// Add '.ts' and '.tsx' as resolvable extensions.
		extensions: [".ts", ".tsx", ".js", ".json"]
	},

	module: {
		rules: [
			// All files with a '.ts' or '.tsx' extension will be handled by 'awesome-typescript-loader'.
			{ test: /\.tsx?$/, loader: "awesome-typescript-loader" },

			// All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
			{ enforce: "pre", test: /\.js$/, loader: "source-map-loader" }
		]
	},

	// When importing a module whose path matches one of the following, just
	// assume a corresponding global variable exists and use that instead.
	// This is important because it allows us to avoid bundling all of our
	// dependencies, which allows browsers to cache those libraries between builds.
	externals: {
		"react": "React",
		"react-dom": "ReactDOM"
	},

	plugins: [
		new webpack.optimize.CommonsChunkPlugin({
			name: "vendor",
			minChunks: function (module) {
			  // this assumes your vendor imports exist in the node_modules directory
			  return module.context && module.context.includes("node_modules");
			}
		  })
	],

	output: {
		filename: '[name].bundle.js',
		chunkFilename: '[name].bundle.js',
		path: path.resolve(__dirname, 'dist')
	}
};