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useInterval을 또 다시 사용해보자
이전 포스트에서 만들었던 useInterval을 이용해서 시간이 얼마나 남았는지 출력하는 앱을 만들어보려고 한다.들어가기에 앞서 이번 글은 코드종님의 영상을 참고하여 정리하는 글이다.코좀봐코앱을 만들기 전에 항상 생각해야할것은 입력과출력이다. 리액트 훅을 이용한 함수
2022년 6월 21일
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react에서 카운트다운을 해볼까나
react에서 1초씩 카운트 하면서 화면에 출력해주는 함수가 있다고 하자. 그럼 코드를 요렇게 작성할 것이다.그럼 잘 작동할까? 놀랍게도(?) 잘 작동하지 않는다.왜냐면 리랜더링할때마다 setInterval이 새로 호출이 된다. 그럼 setCount를 여러번 만들어내는
2022년 6월 20일
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