webpack.config.js

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

const PATHS = {
  app: path.join(__dirname, 'src'),
  build: path.join(__dirname, 'dist'),
};

// exports.PATHS = PATHS;

module.exports = {
  context: PATHS.app,
  // Entry accepts a path or an object of entries. We'll be using the
  // latter form given it's convenient with more complex configurations.
  entry: {
    app: './index.jsx'
  },
  // Add resolve.extensions.
  // '' is needed to allow imports without an extension.
  // Note the .'s before extensions as it will fail to match without!!!
  resolve: {
    extensions: ['*', '.js', '.jsx']
  },
  output: {
    path: PATHS.build,
    filename: 'bundle.js'
  },
  plugins: [
    new ExtractTextPlugin('style.css'),
    new webpack.DefinePlugin({
      // API_HOST is used for production
      'process.env': {
        NODE_ENV: JSON.stringify(process.env.NODE_ENV || 'development'),
        API_HOST: JSON.stringify(process.env.API_HOST || `http://localhost:${process.env.PORT || 5000}`)
      }
    })
  ],
  module: {
    rules: [
      // Set up jsx. This accepts js too thanks to RegExp
      {
        test: /\.jsx?$/,
        loader: 'babel-loader',
        include: PATHS.app
      },
      {
        test: /\.(scss|css)?$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          // resolve-url-loader may be chained before sass-loader if necessary
          use: ['css-loader', 'resolve-url-loader', 'sass-loader?sourceMap']
        })
      },
      {
        test: /\.(ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'file-loader'
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        loader: 'url-loader?limit=10000&mimetype=application/font-woff',
      },
      {
        test: /\.(png|jpg|gif)$/,
        loader: 'url-loader?limit=250000'
      }
    ]
  },
};