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📌 관련 이슈
closed #26
✨ 과제 내용
📸 스크린샷(선택)
📚 레퍼런스 (또는 새로 알게 된 내용) 혹은 궁금한 사항들
비동기처리와 콜백함수, Promise에 대한 복습 및 이해를 위해 읽어본 것들
https://joshua1988.github.io/web-development/javascript/javascript-asynchronous-operation/
https://joshua1988.github.io/web-development/javascript/promise-for-beginners/