block8.js

// App.js
import React from 'react';
import { Router } from "@reach/router";

import Main from './Main';
import SplitThis from './SplitThis';
import './App.css';

const App = () => (
  <div className="App">
    <Router>
      <Main default path="/" />
      <SplitThis path="/split" />
    </Router>
  </div>
);

export default App;