[JavaScript] 날짜구하는 함수만들기

// 날짜 객체 받아서 문자열로 리턴
function getDateStr(myDate){
	var year = myDate.getFullYear();
	var month = (myDate.getMonth() + 1);
	var day = myDate.getDate();

	month = (month < 10) ? "0" + String(month) : month;
	day = (day < 10) ? "0" + String(day) : day;

	return year + "" + month + "" + day;
}

// 오늘날짜 yyyymmdd
function today(){
	var date = new Date();
	return getDateStr(date);
}

// 오늘로부터 1주일전 날짜 yyyymmdd
function lastWeek(){
	var date = new Date();
	var dayOfMonth = date.getDate();
	date.setDate(dayOfMonth - 7);
	return getDateStr(date);
}

// 값확인
console.log(today());
console.log(lastWeek());