Get current date/time in seconds

2018-06-04 02:42:37

如何在Javascript中以秒为单位获取当前日期/时间？

var seconds = new Date().getTime() / 1000;

....will give you the seconds since midnight, 1 Jan 1970

Reference

 Date.now()

gives milliseconds since epoch. No need to use new .

Check out the reference here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now

(Not supported in IE8.)

Based on your comment, I think you're looking for something like this:

var timeout = new Date().getTime() + 15*60*1000; //add 15 minutes;

Then in your check, you're checking:

if(new Date().getTime() > timeout) {
  alert("Session has expired");
}

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