#### References - [react transition group 으로 화면을 부드럽게 전환시키기](https://velog.io/@ljw4536/react-transition-group-%EC%9C%BC%EB%A1%9C-%ED%99%94%EB%A9%B4%EC%9D%84-%EB%B6%80%EB%93%9C%EB%9F%BD%EA%B2%8C-%EC%A0%84%ED%99%98%EC%8B%9C%ED%82%A4%EA%B8%B0)
References