react-compound-timer 라이브러리를 사용하여 타이머를 만들어보았다. https://www.npmjs.com/package/react-compound-timer react-compound-timer Timer compound react component www.npmjs.com 코드에 관한 설명은 위 링크 내용을 참고해주세요 import React from 'react' import Timer from 'react-compound-timer/build'; export default function SetTimer() { const Hours = Timer.Hours const Minutes = Timer.Minutes const Seconds = Timer.Seconds console.dir..