content: import React from 'react';
  import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
  import ItemsPage from './ItemsPage';
  
  const App = () => (
    <Router>
      <Switch>
          <Route exact path="/" component={ItemsPage} />
          <Route path="/items" component={ItemsPage} />
          <Route path="/items/:productId" component={ItemsPage} />
        </Switch>
    </Router>
  );
  
  export default App;
  