<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;"><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;">안녕하세요! 강의 잘 듣고 있습니다!!</span></span><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;"> ╰(*&deg;▽&deg;*)╯</span></span></div>
<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;">&nbsp;</div>
<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;"><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;">localStorage.getItem("counter") 라고 작성해주면</span></span></div>
<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;"><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;">처음에 local storage에 counter라는 key가 생성되지 않았을때는</span></span></div>
<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;"><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;">null값을 가지는걸 console.log로 확인해봤습니다</span></span></div>
<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;"><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;">객체에 존재하지 않는 property는 undefined라고 생각햤는데...</span></span></div>
<div class="type-placeholder" style="font-size: 15px; letter-spacing: -0.3px; color: #abb0b5; white-space: pre-wrap;"><span style="color: #abb0b5;"><span style="font-size: 15px; letter-spacing: -0.3px; white-space: pre-wrap;"><span style="letter-spacing: -0.3px;">왜 undefined가 아니라 null인지 궁금해요!</span></span></span></div>

<p>좋은 의문입니다~</p>
<p>localStorage.getItem의 기본값이 undefined가 아닌 null이기 때문입니다.</p>
<p>API 스펙이에요 :)&nbsp;</p>

인프런 커뮤니티 질문&답변

localStorage.getItem(