时差并在javascript中转换为小时和分钟

Question

我的时间值如下:starttime like:09:00:00,endTime like:10:00:00; 这里不需要日期值.所以这个值需要计算差异并转换成小时和分钟,秒.

我试过了:

var test = new Date().getTime(startTime); 
var test1 = new Date().getTime(endTime);
var total = test1 - test;

有的时候我得到NaN和1111111一些数字格式.

我怎样才能转换为HH:MM:SS,或任何其他寻找时差的方法.

Answer 1

您可以采用时间值的差异:

var diff = test1.getTime() - test.getTime(); // this is a time in milliseconds
var diff_as_date = new Date(diff);
diff_as_date.getHours(); // hours
diff_as_date.getMinutes(); // minutes
diff_as_date.getSeconds(); // seconds

Answer 2

var startTime = "09:00:00";
var endTime = "10:00:00";

var startDate = new Date("January 1, 1970 " + startTime);
var endDate = new Date("January 1, 1970 " + endTime);
var timeDiff = Math.abs(startDate - endDate);

var hh = Math.floor(timeDiff / 1000 / 60 / 60);
if(hh < 10) {
    hh = '0' + hh;
}
timeDiff -= hh * 1000 * 60 * 60;
var mm = Math.floor(timeDiff / 1000 / 60);
if(mm < 10) {
    mm = '0' + mm;
}
timeDiff -= mm * 1000 * 60;
var ss = Math.floor(timeDiff / 1000);
if(ss < 10) {
    ss = '0' + ss;
}

alert("Time Diff- " + hh + ":" + mm + ":" + ss);