[week8/mission]Debouncing & Throttling #40
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duwlsssss
approved these changes
May 23, 2025
LP/src/pages/SearchResult.tsx
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| const throttledFetchNext = useThrottle(() => { | ||
| if (hasNextPage && !isFetchingNextPage) { | ||
| fetchNextPage(); | ||
| } | ||
| }, 1000); | ||
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| useEffect(() => { | ||
| const handleScroll = () => { | ||
| if ( | ||
| window.innerHeight + window.scrollY >= | ||
| document.body.offsetHeight - 300 | ||
| ) { | ||
| throttledFetchNext(); | ||
| } | ||
| }; | ||
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| window.addEventListener("scroll", handleScroll); | ||
| return () => window.removeEventListener("scroll", handleScroll); | ||
| }, [throttledFetchNext]); |
Contributor
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지금은 리렌더링 시 throttledFetchNext가 매번 새 함수를 리턴해, useEffect의 의존성 배열에서 throttledFetchNext가 계속 바뀌게 돼서, 리렌더링마다 handleScroll 이벤트가 제거되고 새로 등록돼요.
이뿐만 아니라, useThrottle 훅 내에서 lastCall.current도 매번 새로 초기화되기 때문에,
쓰로틀링 효과가 나타나지 않아요!
두가지 방법 중 하나 사용하는 걸 추천드립니당
- useThrottle로 만든 함수를 useRef(...).current에 저장해서 리렌더링돼도 같은 함수 참조를 유지하기
- useThrottle 훅 내에서 useCallback({리턴 함수}, [delay]) as T 로 리턴해 리렌더링 시에도 함수값 유지되게 하기
qowldud
approved these changes
May 23, 2025
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| const [inputValue, setInputValue] = useState(search); | ||
| const [searchType, setSearchType] = useState<"title" | "tag">( | ||
| searchParams.get("type") === "tag" ? "tag" : "title" |
| queryKey: ["search", debouncedSearch, sortOrder, searchType], | ||
| queryFn: async ({ pageParam = 0 }) => { | ||
| console.log("fetching LPs..."); | ||
| const res = await api.get("/lps", { |
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✏️ 작업 내용
#️⃣ 39
#39
📷 작업 결과
💡 함께 공유하고 싶은 부분
🤔 질문
✅ 워크북 체크리스트
✅ 컨벤션 체크리스트