问React路由器无法解析模块

EN

{
  "name": "battle",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "production": "webpack -p",
    "start": "webpack-dev-server"
  },
  "author": "Sam Schaefer <smmschaefer@gmail.com>",
  "license": "ISC",
  "dependencies": {
    "react": "^15.4.0",
    "react-dom": "^15.4.0",
    "react-router": "^3.0.0"
  },
  "devDependencies": {
    "babel-core": "^6.18.2",
    "babel-loader": "^6.2.8",
    "babel-preset-react": "^6.16.0",
    "html-webpack-plugin": "^2.24.1",
    "webpack": "^1.13.3",
    "webpack-dev-server": "^1.16.2"
  }
}

var HtmlWebpackPlugin = require('html-webpack-plugin')
var HTMLWebpackPluginConfig = new HtmlWebpackPlugin({
  template: __dirname + '/app/index.html',
  filename: 'index.html',
  inject: 'body'
});

module.exports = {
  entry: [
    './app/index.js'
  ],
  output: {
    path: __dirname + '/dist',
    filename: "index_bundle.js"
  },
  module: {
    loaders: [
      {test: /\.js$/, exclude: /node_modules/, loader: "babel-loader"}
    ]
  },
  plugins: [HTMLWebpackPluginConfig]
};

var React = require('react');
var ReactRouter = require('react-router');
var Router = ReactRouter.Router;
var Route = ReactRouter.Route;
var IndexRoute = ReactRouter.IndexRoute;
var Main = require('../components/Main');
var Home = require('../components/Home');

var routes = (
    <Router>
        <Route path='/' component={Main}>
            <Route path='/home' component={Home} />
        </Route>
    </Router>
);

module.exports = routes;