<p>안녕하세요 선생님 수업 정말 감사하게 잘듣고있는 한 학생입니다. 저는 toggleHandler를 선언할때 newChecked 배열을 쓰지않고 바로바로 Checked에 접근했는데 checked함수까지 선생님과 똑같이 설정하고 테스트해봣는데 정상적으로 작동하지 않아서요ㅠㅠ 혹시 newChecked로 접근하는 것과 저처럼 바로 setChecked로 접근하는 차이가 있을까요??ㅠㅠ</p>
<div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Consolas, 'Courier New', monospace; font-size: 14px; line-height: 19px; white-space: pre;">
<div><span style="color: #569cd6;">const</span>&nbsp;<span style="color: #dcdcaa;">toggleHandler</span>&nbsp;=&nbsp;(<span style="color: #9cdcfe;">id</span>)&nbsp;<span style="color: #569cd6;">=&gt;</span>&nbsp;{</div>
<br />
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #569cd6;">let</span>&nbsp;<span style="color: #9cdcfe;">currentIndex</span>&nbsp;=&nbsp;<span style="color: #4fc1ff;">Checked</span>.<span style="color: #dcdcaa;">indexOf</span>(<span style="color: #9cdcfe;">id</span>)</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #6a9955;">//let&nbsp;newChecked&nbsp;=&nbsp;[...Checked]</span></div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #c586c0;">if</span>&nbsp;(<span style="color: #9cdcfe;">currentIndex</span>&nbsp;===&nbsp;-<span style="color: #b5cea8;">1</span>)&nbsp;{</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #dcdcaa;">setChecked</span>([...<span style="color: #4fc1ff;">Checked</span>,&nbsp;<span style="color: #9cdcfe;">id</span>])</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #6a9955;">//newChecked.push(id)</span></div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;<span style="color: #c586c0;">else</span>&nbsp;{</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #4fc1ff;">Checked</span>.<span style="color: #dcdcaa;">splice</span>(<span style="color: #9cdcfe;">currentIndex</span>,&nbsp;<span style="color: #b5cea8;">1</span>)</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #6a9955;">//newChecked.splice(currentIndex,&nbsp;1)</span></div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}</div>
<div>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #6a9955;">//setChecked(newChecked)</span></div>
<div>&nbsp;&nbsp;&nbsp;}</div>
</div>

인프런 커뮤니티 질문&답변

안녕하세요 선생님 checkbox질문입니다ㅠㅠㅠ