전병주 과제 #3
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전병주 과제 #3
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leemanjae02
reviewed
Nov 14, 2024
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| const InputChange = (event: React.ChangeEvent<HTMLInputElement>) => { | ||
| setInputValue(event.target.value); | ||
| }; |
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이 부분에서 event: 는 e로 축약해서 적을 수 있어요!
leemanjae02
reviewed
Nov 14, 2024
| }; | ||
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| function App() { | ||
| const [count, setCount] = useState(0); |
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할 일 개수를 관리하는 이 count 상태가 꼭 필요한지 생각해보세요!
const[count, setCount] = useState<number>(0);이렇게 타입과 초기값을 명확히 추가하시는게 좋아요!
leemanjae02
reviewed
Nov 15, 2024
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| const DeleteItem = (id: number) => { | ||
| const updatedList = itemList.filter((_, idx) => idx !== id); | ||
| setItemList(updatedList); | ||
| setCount(count - 1); | ||
| }; |
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filter(_, idx) 부분에서 _ 이건 무엇을 의미하나요?
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