webpack-dev-server.config.js

const webpack = require('webpack');
const path = require('path');
const buildPath = path.resolve(__dirname, 'build');
const nodeModulesPath = path.resolve(__dirname, 'node_modules');
const bowerComponentsPath = path.resolve(__dirname, 'bower_components');
const TransferWebpackPlugin = require('transfer-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");


const PORT = process.env.PORT || 3000;
const config = {
  // Entry points to the project
  entry: [
    'webpack/hot/dev-server',
    'webpack/hot/only-dev-server',
    'script!jquery/dist/jquery.min.js',
    'script!foundation-sites/dist/js/foundation.min.js',
    path.join(__dirname, '/src/app/app.js'),
  ],
  // Server Configuration options
  devServer: {
    contentBase: 'src/www', // Relative directory for base of server
    devtool: 'eval',
    hot: true, // Live-reload
    inline: true,
    port: PORT, // Port Number
    host: 'localhost', // Change to '0.0.0.0' for external facing server
  },
  devtool: 'source-map',
  output: {
    path: buildPath, // Path of output file
    filename: 'app.js',
  },

  resolve: {
    root: __dirname,
    extensions: ['', '.js', '.jsx', 'css', 'scss'],
    alias: {
    }
  },

  externals:{
    jquery: 'jQuery'
  },

  plugins: [
    new webpack.ProvidePlugin({
      '$': 'jquery',
      'jQuery': 'jquery'
    }),

    new ExtractTextPlugin("style.css"),

    // Enables Hot Modules Replacement
    new webpack.HotModuleReplacementPlugin(),
    // Allows error warnings but does not stop compiling.
    new webpack.NoErrorsPlugin(),

    // Moves files
    new TransferWebpackPlugin([
      { from: 'www' },
    ], path.resolve(__dirname, 'src')),
  ],

  module: {
    loaders: [
      {
        // React-hot loader and
        test: /\.js$/, // All .js files
        loaders: ['react-hot-loader', 'babel-loader'], // react-hot is like browser sync and babel loads jsx and es6-7
        exclude: [nodeModulesPath, bowerComponentsPath],
      },

      {
        test: /\.css$/,
        loader: ExtractTextPlugin.extract('style-loader', 'css-loader?sourceMap')
      },

      {
        test: /\.scss$/,
        loader: ExtractTextPlugin.extract('style-loader', 'css-loader?sourceMap!sass-loader?sourceMap')
      },
    ]
  },

};

module.exports = config;