Javascript/date_test02.html at main · ksj2001/Javascript · GitHub

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<!DOCTYPE html>
<html lang="kr">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Date 객체</title>
</head>
<body>
    <h3>Date 객체로 현재 시간 알아내기</h3>
    <hr>
    <script>
        let now = new Date();
        let weekString = ['일','월','화','수','목','금','토'];
        document.write(now.getFullYear() + '년도<br>');
        document.write(now.getMonth() + '월<br>');
        document.write(now.getDate() + '일<br>');
        let week = now.getDay();
        for(let i=0;i<weekString.length;i++){
            if(week === i){
                document.write(weekString[i] + '요일<br>');
            }
        }
        document.write(now.getHours() + '시<br>');
        document.write(now.getMinutes() + '분<br>');
        document.write(now.getSeconds() + '초<br>');
        document.write(now.getMilliseconds() + '밀리초<br><hr>');
        document.write(`toLocalDateString : ${now.toLocaleDateString()} <br>`);
        document.write(`toLocalTimeString : ${now.toLocaleTimeString()} <br><hr>`);
        let startDate = new Date(2023,8,1);
        document.write(`시작일자 : ${startDate} <br>`);
        document.write(`시작일의 요일 : ${startDate.getDay()} <br>`);
        let lastDate = new Date(2023,9,0);
        document.write(`마지막일자 : ${lastDate.toLocaleDateString()} <br>`);
        document.write(`마지막일 : ${lastDate.getDate()} <br>`);
        let previousDate = new Date(2023,8,-1);
        document.write(`이틀전 일자 : ${previousDate.toLocaleDateString()} <br>`);
    </script>
</body>
</html>