js-constructor/webpack.config.js

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

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist')
  },
  devServer: {
    port: 3000
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html'
    })
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [
          'style-loader',
          'css-loader'
          // 'handlebars-loader', // handlebars loader expects raw resource string
          // 'extract-loader'
        ]
      }
    ]
  }
}