如何计算 24 小时格式的两个时间之间的差异

您可以立即减去小时

var valuestart = $("select[name='timestart']").val();
var valuestop = $("select[name='timestop']").val();
//create date format          
var timeStart = new Date("01/01/2007 " + valuestart).getHours();
var timeEnd = new Date("01/01/2007 " + valuestop).getHours();
var hourDiff = timeEnd - timeStart;             

这是工作小提琴 http://jsfiddle.net/VnwF7/4/

更新 - 计算我们是否包括第二天。 只需添加以下内容 if 块

 if (hourDiff < 0) {
    hourDiff = 24 + hourDiff;
 }

http://jsfiddle.net/gfvhqat9/

试试这种方式

var time_start = new Date();
var time_end = new Date();
var value_start = "06:00:00".split(':');
var value_end = "23:00:00".split(':');
time_start.setHours(value_start[0], value_start[1], value_start[2], 0)
time_end.setHours(value_end[0], value_end[1], value_end[2], 0)
time_end - time_start // millisecond 

我更改了您的代码以仅使用差异，而无需创建另一个日期对象：

$(document).ready(function() {    
function calculateTime() {
        //get values
        var valuestart = $("select[name='timestart']").val();
        var valuestop = $("select[name='timestop']").val();
         //create date format          
         var timeStart = new Date("01/01/2007 " + valuestart);
         var timeEnd = new Date("01/01/2007 " + valuestop);
         var difference = timeEnd - timeStart;             
         difference = difference / 60 / 60 / 1000;

    $("p").html("<b>Hour Difference:</b> " + difference)             
}
$("select").change(calculateTime);
calculateTime();
});​

它不是 Jquery，而是 JavaScript 中与时间和日期相关的所有内容......

这可能会有所帮助：datejs http://code.google.com/p/datejs/

这是文档中的一些日期和时间计算

 Date.today().set({ day: 15 })          // Sets the day to the 15th of the current month and year. Other object values include year|month|day|hour|minute|second.
        Date.today().set({ year: 2007, month: 1, day: 20 })

Date.today().add({ days: 2 })          // Adds 2 days to the Date. Other object values include year|month|day|hour|minute|second.
        Date.today().add({ years: -1, months: 6, hours: 3 })

Date.today().addYears(1)               // Add 1 year.
Date.today().addMonths(-2)             // Subtract 2 months.
Date.today().addWeeks(1)               // Add 1 week
Date.today().addHours(6)               // Add 6 hours.
Date.today().addMinutes(-30)           // Subtract 30 minutes
Date.today().addSeconds(15)            // Add 15 seconds.
Date.today().addMilliseconds(200)      // Add 200 milliseconds.
Date.today().moveToFirstDayOfMonth()   // Returns the first day of the current month.
Date.today().moveToLastDayOfMonth()    // Returns the last day of the current month.
new Date().clearTime()                 // Sets the time to 00:00 (start of the day).
Date.today().setTimeToNow()            // Resets the time to the current time (now). The functional opposite of .clearTime()

编辑：由于这是一个相当古老的答案，我最近也使用moment.js用于与日期相关的操作也非常有用。http://momentjs.com/https://github.com/moment/moment/

对于此特定情况，您无需将它们转换为日期。就这样做

$(document).ready(function() {    
    function calculateTime() { 
        var hourDiff = 
        parseInt($("select[name='timestart']").val().split(':')[0],10) -         
        parseInt($("select[name='timestop']").val().split(':')[0],10);
        $("p").html("<b>Hour Difference:</b> " + hourDiff )         
    }
    $("select").change(calculateTime);
    calculateTime();
});

工作小提琴

这段代码对我有用，代码是通过考虑 AM PM 差异编写的。只需根据您喜欢的格式编写日期并尝试此代码

function getTimeDifference(startTime, endTime) {
  const difference = endTime - startTime;
  const differenceInMinutes = difference / 1000 / 60;
  let hours = Math.floor(differenceInMinutes / 60);
  if (hours < 0) {
    hours = 24 + hours;
  }
  let minutes = Math.floor(differenceInMinutes % 60);
  if (minutes < 0) {
    minutes = 60 + minutes;
  }
  const hoursAndMinutes = hours + ":" + (minutes < 10 ? '0' : '') + minutes;
  return hoursAndMinutes;
}
const start = new Date(0,0,0,23,15);
const end = new Date(0,0,0,1,30);
const difference = getTimeDifference(start, end);
console.log(difference);