dev.webpack.conf.js

var webpack = require('webpack');
var path = require('path');

module.exports = {
  context: __dirname,
  devtool: "inline-sourcemap" ,
  entry: [
    "./src/app.js",
    "webpack-dev-server/client?http://localhost:8080",
    "webpack/hot/dev-server"
  ],
  output: {
    path: __dirname + "/dist",
    filename: "bundle.js",
    publicPath: "/dist/"
  },
  plugins: [
      new webpack.HotModuleReplacementPlugin()
  ],
  module: {
      loaders: [
        {
            test: /.jsx?$/,
            exclude: /node_modules/,
            loaders: ['react-hot-loader/webpack', 'babel-loader?'+JSON.stringify({
                presets: ['es2015', 'react', 'stage-2', "stage-1"],
                plugins: ["transform-decorators-legacy", "transform-class-properties"]
            })],
            include: path.join(__dirname, 'src')
        },
        {
            test: /\.css$/,
            loader: 'style!css?modules',
            include: /flexboxgrid/
        }
    ]
  },
  node: {
    fs: "empty"
  }
};