webpack.build.config.js

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

module.exports = {
  entry: {
    main: [
      'babel-polyfill',
      './demo/index'
    ]
  },
  output: {
    path: path.join(__dirname, 'www'),
    filename: 'bundle.js'
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production')
      }
    }),
    new ExtractTextPlugin({ filename: 'style.css', allChunks: true })
  ],
  resolve: {
    extensions: ['.js', '.jsx']
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              cacheDirectory: true
            }
          }
        ]
      },
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader'
          ]
        })
      },
      {
        test: /\.(woff|woff2|ttf|eot|svg|png)(\?\S*)?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]'
            }
          }
        ]
      }
    ]
  }
}