webpack.config.js

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

const ExtractTextPlugin = require('extract-text-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')

const paths = {
  src: path.join(__dirname, 'src'),
  dist: path.join(__dirname, 'dist'),
  data: path.join(__dirname, 'src/data'),
  img: path.join(__dirname, 'src/img')  
}

module.exports = {
  context: paths.src,
  entry: ['./app.js', './main.scss'],
  output: {
    filename: 'app.bundle.js',
    path: paths.dist
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: [/node_modules/],
        use: [{
          loader: 'babel-loader',
          options: { presets: ['es2015', 'stage-0'] },
        }],
      },
      {
        test: /\.scss$/,
        use: ExtractTextPlugin.extract([
          'css-loader', 'sass-loader'
        ]),
      }
    ],
  },
  devServer: {
    contentBase: paths.dist,
    compress: true,
    port: '4800',
    stats: 'errors-only',
  },
  plugins: [
    new ExtractTextPlugin({
      filename: 'main.bundle.css',
      allChunks: true,
    }),
    new CopyWebpackPlugin([
      {
        from: paths.data,
        to: paths.dist + '/data'
      },
      {
        from: paths.img,
        to: paths.dist + '/img'
      },
      {
        from: paths.src + '/*.html',
        to: paths.dist + '/'
      }
    ]),
  ],
}