它很容易工作:

var endTime = $("#ExamEndTime").val();
var startTime = $("#ExamStartTime").val();

//create date format          
var timeStart = new Date("01/01/2007 " + startTime);
var timeEnd = new Date("01/01/2007 " + endTime);
                
var  msInMinute = 60 * 1000;

var difference =  Math.round(Math.abs(timeEnd - timeStart) / msInMinute);

$("#txtCalculate").val(difference);

这是我在节点中求解类似问题时得到的一些乐趣。

function formatTimeDiff(date1, date2) {
  return Array(3)
    .fill([3600, date1.getTime() - date2.getTime()])
    .map((v, i, a) => {
      a[i+1] = [a[i][0]/60, ((v[1] / (v[0] * 1000)) % 1) * (v[0] * 1000)];
      return `0${Math.floor(v[1] / (v[0] * 1000))}`.slice(-2);
    }).join(':');
}

const millis = 1000;
const utcEnd = new Date(1541424202 * millis);
const utcStart = new Date(1541389579 * millis);
const utcDiff = formatTimeDiff(utcEnd, utcStart);

console.log(`Dates:
  Start   : ${utcStart}
  Stop    : ${utcEnd}
  Elapsed : ${utcDiff}
  `);

/*
Outputs:

Dates:
  Start   : Mon Nov 05 2018 03:46:19 GMT+0000 (UTC)
  Stop    : Mon Nov 05 2018 13:23:22 GMT+0000 (UTC)
  Elapsed : 09:37:02
*/

你可以在https://repl.it/@GioCirque/TimeSpan-Formatting上看到它的运行

这应该以分钟为单位显示两个日期之间的差异。在浏览器中试试:

const currDate = new Date('Tue Feb 13 2018 13:04:58 GMT+0200 (EET)')
const oldDate  = new Date('Tue Feb 13 2018 12:00:58 GMT+0200 (EET)')


(currDate - oldDate) / 60000 // 64

一个简单的函数来执行这个计算:

function getMinutesBetweenDates(startDate, endDate) {
    var diff = endDate.getTime() - startDate.getTime();
    return (diff / 60000);
}

下面的代码对我有用，

function timeDiffCalc(dateNow,dateFuture) {
    var newYear1 = new Date(dateNow);
    var newYear2 = new Date(dateFuture);

        var dif = (newYear2 - newYear1);
        var dif = Math.round((dif/1000)/60);
        console.log(dif);

}

var startTime = new Date('2012/10/09 12:00'); 
var endTime = new Date('2013/10/09 12:00');
var difference = endTime.getTime() - startTime.getTime(); // This will give difference in milliseconds
var resultInMinutes = Math.round(difference / 60000);