<img title="스크린샷 2021-09-17 오후 9.22.47(2).png" src="https://cdn.inflearn.com/public/files/posts/056b9928-0850-4898-8a87-8934f7b94130/스크린샷 2021-09-17 오후 9.22.47(2).png" alt="" width="1335" height="387" />
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currentYOffset 변수 부분에서&nbsp;
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<div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-size: 12px; line-height: 18px; white-space: pre;">prevScrollHeight -&gt; preScrollHeight</div>
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위처럼 수정하셔야 합니다
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가벼운 오타가 있어서 남겨둡니다!
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<span style="color: #87d5fe; font-family: Menlo, Monaco, 'Courier New', monospace; font-size: 12px; white-space: pre; background-color: #171819; --darkreader-inline-color: #78d0fe; --darkreader-inline-bgcolor: #121414;" data-darkreader-inline-color="" data-darkreader-inline-bgcolor="">preScrollHeight 는 어떤건가요? prev아닌가요??
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main-add.js playAnimation 함수 오타