Webpack simple configuration to serve and transpile Stimulus code.

package.json

{
   "dependencies": {
      "@babel/plugin-proposal-class-properties": "^7.4.0",
      "stimulus": "^1.1.1",
      "webpack-cli": "^3.3.0",
      "webpack-dev-server": "^3.2.1"
   },
   "name": "development",
   "version": "1.0.0",
   "description": "",
   "main": "webpack.config.js",
   "scripts": {
      "test": "echo \"Error: no test specified\" && exit 1",
      "watch": "webpack --watch",
      "start": "webpack-dev-server --open",
      "build": "webpack"
   },
   "keywords": [],
   "author": "",
   "license": "ISC",
   "devDependencies": {
      "clean-webpack-plugin": "^2.0.0",
      "css-loader": "^0.28.4",
      "csv-loader": "^2.1.1",
      "file-loader": "^0.11.2",
      "html-webpack-plugin": "^3.2.0",
      "style-loader": "^0.18.2",
      "webpack": "^4.29.6",
      "xml-loader": "^1.2.1"
   }
}

webpack.config.js

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

module.exports = {
    mode: 'development',
    entry: {
	app: './src/index.js'
    },
    devtool: 'inline-source-map',
    devServer: {
	contentBase: './dist'
    },
    plugins: [
	new CleanWebpackPlugin(),
	new HtmlWebpackPlugin({
            title: 'Development'
	})
    ],
    output: {
	filename: 'natar.bundle.js',
	path: path.resolve(__dirname, 'dist')
    }
};