lovecoding
/
W260426


			
				
					
						
						
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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        // 判断是否为闰年
        // 闰年的定义是：能被4整除并且不能被100整除，或者能被400整除
        var today = new Date();//获取当前日期
        var year = today.getFullYear();//获取当前年份
        var isLeapYear = (year%4 == 0 && year%100 != 0) || year%400 == 0;
        var res = isLeapYear ? "是闰年" : "不是闰年";
        console.log(res);
    </script>
</body>
</html>