你可以简单地做。

var secondBetweenTwoDate = Math.abs((new Date().getTime() - oldDate.getTime()) / 1000);

你可以简单地做。

var secondBetweenTwoDate = Math.abs((new Date().getTime() - oldDate.getTime()) / 1000);

var a = new Date("2010 jan 10"),
    b = new Date("2010 jan 9");

alert(
    a + "\n" + 
    b + "\n" +
    "Difference: " + ((+a - +b) / 1000)
);

function parseDate(str) {
  const [dateStr, timeStr] = str.split(' ');
  const [m,d,y] = dateStr.split('/');
  const [h,min] = timeStr.split(':');
  const date = new Date(y,m,d,h,min,0, 0);
  
  return date;
}

const date1 = parseDate('28/6/2022 22:55');
const date2 = parseDate('28/6/2022 22:58');
const diffInSeconds = (date2 - date1) / 1000;

console.log(diffInSeconds)

减:

var a = new Date(); 警报(“等待几秒钟，然后点击确定”); var b = new Date(); Var差= (b - a) / 1000; console.log("You waiting: " + difference + " seconds");

在bash中:

bc <<< "$(date --date='1 week ago' +%s) - \
    $(date --date='Sun,  29 Feb 2004 16:21:42 -0800' +%s)"

它确实需要安装bc和gnu日期。