JavaScript_Date对象_实例方法_get类

 计算这一年还剩多少天：

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<head>

    <meta charset="UTF-8">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <title>Document</title>

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<body>

    <script>

        function leftDays(){

            var today=new Date();

            var endYear=new Date(today.getFullYear(),11,31,23,59,59,999);

            var msPerDay=24*60*60*1000;

            console.log(Math.floor((endYear-today)/msPerDay));

        }

        leftDays();

    </script>

</body>

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