/**
 * <Route path="/" component={Core}>
 *  <IndexRoute component={Home}/>
 *  <Route path="about" component={About}/>
 *  <Route path="users" component={Users}>
 *  <Route path="*" component={Home}/>
 * </Route>
 */
export default {
 path: '/', 
 component: Core,
 indexRoute: { 
  getComponent(location, cb) {
    ...
  },
 },
 childRoutes: [
  {
   path: 'about', 
   getComponent(location, cb) {
    ...
   },
  },
  {
   path: 'users', 
   getComponent(location, cb) {
    ...
   },
  },
  {
   path: '*', 
   getComponent(location, cb) {
    ...
   },
  },
 ],
};

import IndexPage from './views/app.jsx'
import AboutPage from './views/about.jsx'
export default function({history}) {
  return (
    <Router history={history}>
      <Route path="/" component={IndexPage} />
      <Route path="/about" component={AboutPage} />
    </Router>
  )
}

export default function({history}) {
  return (
    <Router history={history}>
      <Route path="/" getComponent={(location, callback) => {
        require.ensure([], function(require) {
          callback(null, require('./HomePage.jsx'))
        })
      }} />
      <Route path="/about" getComponent={(location, callback) => {
        require.ensure([], function(require) {
          callback(null, require('./AboutPage.jsx'))
        })
      }} />
    </Router>
  )
}

const home = (location, callback) => {
 require.ensure([], require => {
  callback(null, require('./HomePage.jsx'))
 }, 'home')
}

const about = (location, callback) => {
 require.ensure([], require => {
  callback(null, require('./AboutPage.jsx'))
 }, 'about')
}
export default function({history}) {
  return (
    <Router history={history}>
      <Route path="/" getComponent={home}></Route>
      <Route path="/about" getComponent={about}></Route>
    </Router>
  )
}

export default function({history}) {
  return (
    <Router history={history}>
      <Route path="/" getComponent={(location, callback) => {
        System.import('./HomePage.jsx').then(component => {
          callback(null, component.default || component)
        })
      }} />
      <Route path="/about" getComponent={(location, callback) => {
        System.import('./AboutPage.jsx').then(component => {
          callback(null, component.default || component)
        })
      }} />
    </Router>
  )
}

const home = (location, callback) => {
  System.import('./HomePage.jsx').then(component => {
    callback(null, component.default || component)
  })
}
const about = (location, callback) => {
  System.import('./AboutPage.jsx').then(component => {
    callback(null, component.default || component)
  })
}

export default ({ history }) => {
  return (
    <Router history={history}>
      <Route name="home" path="/" getComponent={home} />
      <Route name="about" path="/about" getComponent={about} />
    </Router>
  )
}

const routerThen = (app, callback, [component, model]) => {
  app.model(model.default || model)
  callback(null, component.default || component)
}

export default ({ history, app }) => {
  return (
    <Router history={history}>
      <Route name="home" path="/" getComponent={(location, callback) => {
        Promise.all([
          System.import('./views/app.jsx'),
          System.import('./models/topics')
        ]).then(routerThen.bind(null, app, callback))
      }} />
      <Route name="article" path="/article/:id" getComponent={(location, callback) => {
        Promise.all([
          System.import('./views/article.jsx'),
          System.import('./models/topic')
        ]).then(routerThen.bind(null, app, callback))
      }} />
    </Router>
  )
}