webpack.config.dev.js

// webpack.config.dev.js
const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const DashboardPlugin = require('webpack-dashboard/plugin')

const APP = path.join(__dirname, 'src')
const DIST = path.join(__dirname, 'dist')


module.exports = {
  devtool: 'cheap-eval-source-map',
  entry: [
    'webpack-dev-server/client?http://localhost:8080',
    'webpack/hot/dev-server',
    'react-hot-loader/patch',
    './src/index'
  ],
  output: {
    path: DIST,
    filename: 'bundle.js'
  },
  resolve: {
    extensions: ['', '.js', '.jsx', '.scss']
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/templates/index.html'
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development')
    }),
    new webpack.HotModuleReplacementPlugin(),
    new DashboardPlugin()
  ],
  module: {
    loaders: [{
      test: /\.jsx?$/,
      loaders: ['babel'],
      include: APP
    }, {
      test: /\.scss$/,
      loaders: ['style', 'css', 'sass']
    }, {
      test: /\.js$/,
      loaders: ['babel'],
      plugins: ['transform-class-properties'],
      include: APP
    }]
  },
  devServer: {
    contentBase: './dist',
    hot: true
  }
}