[4주차] 김영서 과제 제출합니다. #15
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앞으로 다음과 같은 규칙을 적용함 리액트 컴포넌트: *.tsx 스타일드 컴포넌트: *.Styled.ts 단순 객체, 자바스크립트 함수, 스타일 정의 등: *.ts
uuidv4()로 고유하게 관리
BeanMouse
reviewed
Apr 28, 2025
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| const lastSenderRef = useRef<number | null>(null) | ||
| const lastSentTimeRef = useRef<number | null>(null) | ||
| const chatWrapperRef = useRef<HTMLDivElement | null>(null) | ||
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| {dateChatPair.map(([date, chat], dateIdx) => ( | ||
| <div key={date}> | ||
| {<ChatDate date={date} dateIdx={dateIdx} />} | ||
| {chat.map(({ id, content, sender }: Chat, chatIdx: number) => { |
| <s.ChatDiv $isR={true} $isMe={isMe}> | ||
| <div>{content}</div> | ||
| </s.ChatDiv> | ||
| {!isMe && souldDisplayTime ? ( |
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| const determineLastSender = (sender: number): boolean => { | ||
| const isLastSender = sender === lastSenderRef.current | ||
| lastSenderRef.current = sender | ||
| return isLastSender | ||
| } | ||
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| const determineLastMsgSentSameTime = (curTime: number): boolean => { | ||
| const curMinuteTimestamp = Math.floor(curTime / 60000) | ||
| const isLastMsgSentSameTime = curMinuteTimestamp === lastSentTimeRef.current | ||
| lastSentTimeRef.current = curMinuteTimestamp | ||
| return isLastMsgSentSameTime | ||
| } | ||
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| const determineSentSameTime = ( | ||
| curTime: number, | ||
| nextTime: number | ||
| ): boolean => { | ||
| const curMinuteTimestamp = Math.floor(curTime / 60000) | ||
| const nextMinuteTimestamp = Math.floor(nextTime / 60000) | ||
| return curMinuteTimestamp === nextMinuteTimestamp | ||
| } |
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컴포넌트가 랜더링 될 때마다 함수가 다시 생성되는걸 방지하기 ㅇ위해..
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| if (chatRoomRef === roomId) { | ||
| createChatRoom(roomId, member) | ||
| enterChatRoom(roomId) | ||
| } | ||
| addChat(roomId, newChat) | ||
| updateLastSeenTime(roomId) |
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제가 코드를 꼼꼼히 보지는 못했는데 여기서 Ref랑 id랑 값이 같은데 왜 createChatRoom인지 이해가 부족한 것 같습니다
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배포 링크
https://react-messenger-21th-five.vercel.app/
느낀점
KQ
1. React Router의 동적 라우팅(Dynamic Routing)이란 무엇이며, 언제 사용하나요?
URL 경로에 변수를 포함해 라우트를 설정하는 방식으로
:id파라미터를 이용해 구현한다.UI는 같지만 데이터가 동적으로 달라지는 페이지에서 사용하며 보통 상세 페이지에 해당하는 페이지에서 주로 사용한다.
2. 네트워크 속도가 느린 환경에서 사용자 경험을 개선하기 위해 사용할 수 있는 UI/UX 디자인 전략과 기술적 최적화 방법은 무엇인가요?
3. React에서 useState와 useReducer를 활용한 지역 상태 관리와 / Context API 및 전역 상태 관리 라이브러리의 차이점을 설명하세요.
지역 상태 관리
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