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';
import Post from './Post';
import User from './User';

function App() {
  return (
    <>
    <Router>
      <NavBar/>
      <Switch>
        <Route exact path="/" component={PostList}/>
        <Route exact path="/posts/" component={PostList}/>
        <Route path="/posts/:slug" component={Post}/>
        <Route path="/users/:user" component={User}/>
      </Switch>
    </Router>
    </>
  );
}

export default App;