[javascript] 시간 yyyy-mm-dd 와 같이 출력

function getYYYYMMDDToString(dateStr){
            const date = new Date(dateStr);
            const seconds = date.getSeconds();
            const minuites = date.getMinutes();
            const hh = date.getHours();
            const dd = date.getDate();
            const mm = date.getMonth()+1;      
            const yyyy = date.getFullYear();

            let ddStr = {
                  "seconds" : (seconds < 10) ? "0" + seconds.toString() : seconds.toString(),
                  "minuites" : (minuites < 10) ? "0" + minuites.toString() : minuites.toString(),
                  "hh" : (hh < 10) ? "0" + hh.toString() : hh.toString(),
                  "mer" : (hh < 12) ? "오전" : "오후",
                  "dd" : (dd < 10) ? "0" + dd.toString() : dd.toString(),
                  "mm" : (mm < 10) ? "0" + mm.toString() : mm.toString(),
                  "yyyy" : yyyy.toString()
            }            
            // const s1 = `${ddStr.yyyy}년 ${ddStr.mm}월 ${ddStr.dd}일 ${ddStr.mer} ${ddStr.hh}:${ddStr.minuites}:${ddStr.seconds}`;
            const s1 = `${ddStr.yyyy}년 ${ddStr.mm}월 ${ddStr.dd}일`;
            return s1;
}