Header를 스크롤에 따라 반응시키기

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Mon Sep 05 2022 05:35:57 GMT+0000 (Coordinated Universal Time)

// 스크롤이 내려가고 올라오는지 확인해주는 핸들러
  const handleScroll = useCallback(
    (e) => {
      // 현재위치와 이전 위치의 차를 계산한다.
      const diff = e.target.scrollTop - prevY
      if (diff > 0) {
        console.log('내려가는중')
        // 헤더를 보여줄지 말지 set
        setIsHeaderShow(false)
      } else if (diff < 0) {
        console.log('올라가는중')
        setIsHeaderShow(true)
      }
      setPrevY(e.target.scrollTop)
    },
    [prevY]
  )
// 스크롤이 멈췄는지 확인해주는 핸들러
  const stopScroll = useCallback((e) => {
    console.log('🥎🥎🥎멈춤', e.target.scrollTop)
    // 스크롤이 가장 끝까지 올라가면 헤더보임.
    // 스크롤이 멈추면 헤더안보임
    if (e.target.scrollTop === 0) {
      setIsHeaderShow(true)
    } else {
      setIsHeaderShow(false)
    }
  }, [])
  // 스크롤의 위 아래 이동감지는 쓰로틀이 이용
  const throttleScroll = useThrottle(handleScroll, 300)
  // 스크롤의 멈춤은 디바운스를 이용한다.(디바운스가 마지막 그룹의 이벤트를 노티해준다는 특성이용)
  const debounceScroll = useDebounce(stopScroll, 1500)
  const scrollDetectHandler = useCallback(
    (...e) => {
      throttleScroll(...e)
      debounceScroll(...e)
    },
    [prevY]
  )
  // DOM 제어시 useLayoutEffect를 사용하는게 성능상 좋음.
  useLayoutEffect(() => {
    if (scrollRef.current) {
      scrollRef.current.addEventListener('scroll', scrollDetectHandler)
    }
    return () => {
      if (!scrollRef.current) return
      scrollRef.current.removeEventListener('scroll', scrollDetectHandler)
    }
  }, [prevY])

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https://velog.io/@broccoliindb/Header를-스크롤에-따라-반응시키기

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@wumeenna

React Custom Hooks로 scroll animation 만들기 FadeIn편 | 수줍은 동그래 블로그 React 스크롤시 Fix 하기 (Window scroll) Animate header on scroll with Next.js & TailwindCSS | thiscodeWorks Header를 스크롤에 따라 반응시키기 COINSS: React Custom Hooks로 Scroll Event 구현하기 COINSS: React Custom Hooks로 Scroll Event 구현하기 scroll to top [React] 리액트앱에서 페이지 스크롤 방향과 예제

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Header를 스크롤에 따라 반응시키기

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