javascript - 获取两个日期之间的时间只能花费几天和几小时，而不能花费几分钟或几秒钟

我要问用户两个日期，一个是最近的，另一个是将来的。

我的脚本应该能够返回几天，几小时，几分钟和几秒钟。

它成功地返回了几天和几小时，但是在几分钟和几秒钟内都返回0，这是我在做什么错？

谢谢！！

function calcTime()
{
  var userYearCurrent = parseInt(prompt("Enter a year in numbers(2019)","Enter a year ex: 2019, 2020, 2021"));
  var userMonthCurrent = parseInt(prompt("Enter a month in numbers(1-12), or type a month name","Enter a month ex: 11, November"));
  var userDayCurrent = parseInt(prompt("Enter a day of The month in mumbers(1-31)","Enter a day of the month ex: 14, 21"));
  var userTimeCurrent = parseInt(prompt("Enter a time (2:05) or if seconds are needed(2:05:30)","Enter a time of day ex: 11:15, do not use military time"));


  var userYearFuture = parseInt(prompt("Enter a FUTURE year in numbers(2019)","Enter a year ex: 2019, 2020, 2021"));
  var userMonthFuture = parseInt(prompt("Enter a FUTURE month in numbers(1-12), or type a month name","Enter a month ex: 11, November"));
  var userDayFuture = parseInt(prompt("Enter a FUTURE day of The month in mumbers(1-31)","Enter a day of the month ex: 14, 21"));
  var userTimeFuture = parseInt(prompt("Enter a FUTURE time (2:05) or if seconds are needed(2:05:30)","Enter a time of day ex: 11:15, do not use military time"));


var dateCurrent = new Date(userYearCurrent, userMonthCurrent, userDayCurrent, userTimeCurrent);
var dateFuture = new Date(userYearFuture, userMonthFuture, userDayFuture, userTimeFuture);

var mathSeconds = Math.abs(dateFuture.getTime()  - dateCurrent.getTime()) / 1000;

var days = Math.floor(mathSeconds / 86400);
mathSeconds -= days * 86400;

var hours = Math.floor(mathSeconds / 3600) % 24;
mathSeconds -= hours * 3600;

var minutes = Math.floor(mathSeconds / 60) % 60;
mathSeconds -= minutes * 60;

var seconds = mathSeconds;

document.getElementById("time2").innerHTML = "Time between your two dates: " + days + " Days: " + hours + " Hours: " + minutes + " Minutes: " + seconds + " Seconds";
}

最佳答案

问题是您正在调用类似parseInt('2:05:30')之类的东西，却无法满足您的需求。您需要分别解析每个片段，然后将小时，分钟和秒作为单独的参数传递给每个Date构造函数。参见下文（出于本示例的考虑，我删除了提示并添加了静态值）：

function promptTime()
{
    var userYearCurrent = 2019;
    var userMonthCurrent = 10;
    var userDayCurrent = 2;
    var userTimeStringCurrent = '2:05:23';
    var userTimeStringCurrentParts = userTimeStringCurrent.split(':');
    if (userTimeStringCurrentParts.length === 2) {
        userTimeStringCurrentParts.push('00'); // empty seconds
    }
    var userHoursCurrent = parseInt(userTimeStringCurrentParts[0]);
    var userMinutesCurrent = parseInt(userTimeStringCurrentParts[1]);
    var userSecondsCurrent = parseInt(userTimeStringCurrentParts[2]);


    var userYearFuture = 2021;
    var userMonthFuture = 8;
    var userDayFuture = 14;
    var userTimeStringFuture = '6:37';
    var userTimeStringFutureParts = userTimeStringFuture.split(':');
    if (userTimeStringFutureParts.length === 2) {
        userTimeStringFutureParts.push('00'); // empty seconds
    }
    var userHoursFuture = parseInt(userTimeStringFutureParts[0]);
    var userMinutesFuture = parseInt(userTimeStringFutureParts[1]);
    var userSecondsFuture = parseInt(userTimeStringFutureParts[2]);


    var dateCurrent = new Date(userYearCurrent, userMonthCurrent, userDayCurrent, userHoursCurrent, userMinutesCurrent, userSecondsCurrent);
    var dateFuture = new Date(userYearFuture, userMonthFuture, userDayFuture, userHoursFuture, userMinutesFuture, userSecondsFuture);

    console.log(calcTime(dateCurrent, dateFuture));
}

function calcTime(dateCurrent, dateFuture)
{
    var mathSeconds = Math.abs(dateFuture.getTime()  - dateCurrent.getTime()) / 1000;

    var days = Math.floor(mathSeconds / 86400);
    mathSeconds -= days * 86400;

    var hours = Math.floor(mathSeconds / 3600) % 24;
    mathSeconds -= hours * 3600;

    var minutes = Math.floor(mathSeconds / 60) % 60;
    mathSeconds -= minutes * 60;

    var seconds = mathSeconds;

    return "Time between your two dates: " + days + " Days: " + hours + " Hours: " + minutes + " Minutes: " + seconds + " Seconds";
}

promptTime();

关于javascript - 获取两个日期之间的时间只能花费几天和几小时，而不能花费几分钟或几秒钟，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58211509/