text: const path = require('path');
  const HtmlWebpackPlugin = require('html-webpack-plugin');
  const CleanWebpackPlugin = require('clean-webpack-plugin');
  const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
  
  module.exports = {
    entry: './src/main.js',
    output: {
      filename: 'bundle.js',
      path: path.resolve(__dirname, 'dist')
    },
    devtool: 'eval-source-map',
    devServer: {
      contentBase: './dist'
    },
    plugins: [
      new UglifyJsPlugin({ sourceMap: true }),
      new CleanWebpackPlugin(['dist']),
      new HtmlWebpackPlugin({
        title: 'Super Galactic Age Calculator',
        template: './src/index.html',
        inject: 'body'
      })
    ],
    module: {
     rules: [
       {
         test: /\.css$/,
         use: [
           'style-loader',
           'css-loader'
         ]
       },
       {
         test: /\.js$/,
         exclude: /node_modules/,
         loader: "eslint-loader"
       },
       // new rule
       {
         test: /\.js$/,
         exclude: [
           /node_modules/,
           /spec/
         ],
         loader: "babel-loader",
         options: {
           presets: ['es2015']
         }
       }
     ]
   }
  };
  