[React] You should not use <Route> outside a <Router>

상황
react-route-dom을 설치하고 App.js에 코드를 작성하니 에러가 발생했다.

<Route path="/today" component={Today}/>
<Route path="/new" component={New}/>
<Route path="/hot" component={Hot}/>
<Route path="/product" component={Product}/>

에러 코드

Error: Invariant failed: You should not use <Route> outside a <Router>

해결 방법
1.github issue / Error: Invariant failed: You should not use <Route> outside a <Router>

2.Error: Invariant failed: You should not use <Route> outside a <Router>

index.js에 위치한 <App />을 <BrowserRouter> 로 묶어주면 된다!

ReactDOM.render(
  <React.StrictMode>
    <BrowserRouter>
      <App />
    </BrowserRouter>
  </React.StrictMode>,
  document.getElementById('root')
);

BrowserRouter가 뭔지 공부하고 정리해봐야겠다.