webpack.config.js

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

module.exports = {
  devtool: 'inline-source-map',
  entry: [
    'babel-polyfill',
    'react-hot-loader/patch',
    'webpack-dev-server/client?http://localhost:3001',
    'webpack/hot/only-dev-server',
    './demo/index'
  ],
  output: {
    path: path.join(__dirname, 'build'),
    filename: 'bundle.js',
    publicPath: '/'
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin()
  ],
  resolve: {
    extensions: ['.js', '.jsx']
  },
  devServer: {
    hot: true,
    contentBase: './www'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              cacheDirectory: true
            }
          },
          'eslint-loader'
        ]
      },
      {
        test: /\.css$/,
        use: [
          'style-loader',
          'css-loader'
        ]
      },
      {
        test: /\.(woff|woff2|ttf|eot|svg|png)(\?\S*)?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]'
            }
          }
        ]
      }
    ]
  }
}