如何获取JavaScript中两个日期之间的秒数？
要获取两个日期之间的秒数，请使用Maths.abs()方法。
示例
您可以尝试运行以下代码以获取两个日期之间的秒数-
<html>
<head>
<title>JavaScript Get Seconds</title>
</head>
<body>
<script>
var date1, date2;
date1 = new Date();
document.write(""+date1);
date2 = new Date( "Dec 10, 2015 20:15:10" );
document.write("<br>"+date2);
//获取两个日期之间的总秒数
var seconds = Math.abs(date1 - date2) / 1000;
document.write("<br>Difference between 2 dates: "+seconds);
</script>
</body>
</html>输出结果
Mon May 28 2018 09:35:25 GMT+0530 (India Standard Time) Thu Dec 10 2015 20:15:10 GMT+0530 (India Standard Time) Difference between 2 dates: 77721615.573