webpack.config.js

const path = require('path')

// Plugins
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");

module.exports = {
  entry: {
    index: './src/js/index.js'
  },
  output: {
    filename: '[name].bundle.js',
    path: path.join(__dirname, 'dist/js')
  },
  watchOptions: {
    ignored: /node_modules/
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
              fallback: 'style-loader',
              use: [
                {
                  loader: 'css-loader',
                  options: { importLoaders: 1 }
                },
                'postcss-loader'
                ]
            })
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: { presets: ['env'] }
          }
        ]
      },
      {
        test: /\.pug$/,
        exclude: /node_modules/,
        use: 'pug-loader'
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin('../css/[name].bundle.css'),
    new HtmlWebpackPlugin({
      filename: '../index.html',
      template: 'src/index.pug',
      chunks: ['index'],
      hash: true
    })
  ]
}