글참조 : https://velog.io/@ggong/%EC%9E%90%EB%B0%94%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8%EC%97%90%EC%84%9C-%EC%8B%B1%EA%B8%80%ED%86%A4-%ED%8C%A8%ED%84%B4-%EC%9D%B4%ED%95%B4%ED%95%98%EA%B8%B0
코드 : https://replit.com/@heedaelee/singgeultonTEST#index.js
