App async

App.js

import React from 'react'
import { BrowserRouter as Router, Route, Link } from 'react-router-dom'

import Home from './Home'
import AsyncHeavy from './AsyncHeavy'

function AppRouter() {
  return (
    <Router>
      <div>
        <nav>
          <ul>
            <li>
              <Link to="/">Home</Link>
            </li>
            <li>
              <Link to="/heavy/">About</Link>
            </li>
          </ul>
        </nav>

        <Route path="/" exact component={Home} />
        <Route path="/heavy/" component={AsyncHeavy} />
      </div>
    </Router>
  )
}

export default AppRouter