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UI_UX/JavaScript & JQuery

[JavaScript] 8. Date 객체 사용

쟌쥰 2020. 1. 26. 15:30 
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	
	<h1>오늘 날짜 출력하기</h1>
	<span id="today"></span>
	<button>오늘날짜</button>
	<button>오늘날짜(표현)</button>
	
	<script type="text/javascript">
		
		onload = function(){
			document.getElementsByTagName("button")[0].onclick = testDate01;
			document.getElementsByTagName("button")[1].onclick = testDate02;
			document.getElementsByTagName("button")[2].onclick = testDate03;
			document.getElementsByTagName("button")[3].onclick = testDate04;
			document.getElementsByTagName("button")[4].onclick = testDate05;
		}
	
		function testDate01(){
			var inputDate = document.getElementById("today");
			var date = new Date();	// 날짜 객체 생성 (기본 생성자는 오늘날짜 생성!)
			
			inputDate.innerHTML = "date.toDateString() : " + date.toDateString() + "<br/>";
			inputDate.innerHTML += "date.toLocaleDateString() : " + date.toLocaleDateString() + "<br/>";
			inputDate.innerHTML += "date.toLocaleString() : " + date.toLocaleString() + "<br/>";
			inputDate.innerHTML += "date.toLocaleTimeString() : " + date.toLocaleTimeString() + "<br/>";
		}
		
		function testDate02(){
			// 2019/12/20/금요일
			var inputDate = document.getElementById("today");
			var date = new Date();	// 날짜 객체 생성 (기본 생성자는 오늘날짜 생성!)
			
			var weekday = new Array(7);
			weekday[0] = "일요일";
			weekday[1] = "월요일";
			weekday[2] = "화요알";
			weekday[3] = "수요일";
			weekday[4] = "목요일";
			weekday[5] = "금요일";
			weekday[6] = "토요일";

			var n = weekday[date.getDay()];
			
			var year = date.getFullYear();
			var month = date.getMonth();
			var date = date.getDate();
			
			inputDate.innerHTML = year + "/" + (month+1) + "/" + date + "/" + n + "<br/>";

		}
		
		function testDate03(){
			var year = 2019;
			var month = 10;
			var day = 30;
			var date = new Date(year, month - 1, day);
			
			document.getElementById("specific").innerHTML = date;
		}
		
		function testDate04(){
			var dates = document.getElementById("dates").value;
			var inputDate = document.getElementById("inputDate").value;
			//console.log(dates + " : " + typeof(dates));
			//console.log(inputdate + " : " + typeof(inputdate));
			
			var date = new Date(dates);
			
			date.setDate(date.getDate() + parseInt(inputDate));
			document.getElementById("result").value = date.toLocaleDateString();
		}
		
		function testDate05(){
			var dates02 = document.getElementById("dates02").value;
			var inputDate02 = document.getElementById("inputDate02").value; 
			
			var dateS = new Date(dates02);
			var dateE = new Date(inputDate02);			
			var hm = (dateE.getTime() - dateS.getTime())/24/60/60/1000;

			document.getElementById("result02").value = hm;
		}
	</script>
	
	<hr>
	
	<h1>특정 날짜 출력하기</h1>
	
	<span id="specific"></span>
	<br>
	<button>특정 날짜</button>
	
	<hr>
	
	<h1>경과 날짜 구하기</h1>
	<label>지정날짜</label>
		<input type="date" id="dates" size="50"/>
		<br>
	<label>경과일</label>
		<input type="number" id="inputDate">
		<br>
	<label>경과 후 날짜</label>
		<input type="text" id="result" readonly="readonly" />
		<br>
	<button>경과 날짜</button>
	
	
	 <hr>
	 
	 <h1>D-day 기능 만들기</h1>
	 <label>시작 날짜</label>
	 	<input type="date" id="dates02" size="50"><br>
	 <label>종료 날짜</label>
	 	<input type="date" id="inputDate02"><br>
	 <label>남은 일수</label>
	 	<input type="text" id="result02" readonly="readonly">
	 <button>남은 일수 구하기</button>
	 <!-- getTime() : milliseconds 반환 -->
	
	
</body>
</html>

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