sudoscientist-js-frontend/src/components/App.js

import React from 'react';
import { BrowserRouter as Router, Route, Switch } from "react-router-dom";
import NavBar from './NavBar';
import PostList from './PostList';

function App() {
  return (
    <Router>
      <NavBar/>
      <Switch>
        <Route exact path="/" component={PostList}/>
        <Route path="/posts" component={PostList}/>
      </Switch>
    </Router>
  );
}

export default App;