Javascript 以 HH:mm 格式计算时差
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calculate time difference in HH:mm format
提问by davioooh
I have two timestamps in HH:mmformat and I need to calculate difference between them representing the time interval in the same HH:mmformat.
我有两个HH:mm格式的时间戳，我需要计算它们之间的差异，表示相同HH:mm格式的时间间隔。
Is there any utility in JavaScript to achieve this? I tried using Dateobject, but I cannot find something useful... Can you help me?
JavaScript 中是否有任何实用程序可以实现这一点？我尝试使用Date对象，但找不到有用的东西...你能帮我吗？
回答by Konerak
You can just substract two Dates from one another, the result will be the difference in milliseconds.
您可以将两个日期相减，结果将以毫秒为单位。
From the Mozilla Developer Network:
// using static methods
var start = Date.now();
// the event you'd like to time goes here:
doSomethingForALongTime();
var end = Date.now();
var elapsed = end - start; // time in milliseconds
Since Date has a constructor that accepts milliseconds as an argument, you can re-convert this to a Date by just doing
由于 Date 有一个接受毫秒作为参数的构造函数，您可以通过执行以下操作将其重新转换为 Date
var difference = new Date(elapsed);
//If you really want the hours/minutes,
//Date has functions for that too:
var diff_hours = difference.getHours();
var diff_mins = difference.getMinutes();
回答by timidboy
Something like this:
像这样的东西：
?var t1 = '12:04'.split(':'), t2 = '3:45'???????.split(':');
var d1 = new? Date(0, 0, 0, t1[0], t1[1]),
d2 = new Date(0, 0, 0, t2[0], t2[1]);
var diff = new Date(d1 - d2);
回答by The Kaizer
You could try this
你可以试试这个
https://github.com/layam/js_humanized_time_span
https://github.com/layam/js_humanized_time_span
and format the output?
并格式化输出？
or if using jquery you can try
或者如果使用 jquery 你可以试试
回答by Graphic Equaliser
Assuming tim1 is a string like "09:15" and tim2 is a string like "19:05", then the difference between tim2 and tim1 could be derived with the following javascript code :-
假设 tim1 是一个像“09:15”这样的字符串，而 tim2 是一个像“19:05”这样的字符串，那么 tim2 和 tim1 之间的差异可以通过以下 javascript 代码得出：-
var tim1='09:15',tim2='19:05';
var ary1=tim1.split(':'),ary2=tim2.split(':');
var minsdiff=parseInt(ary2[0],10)*60+parseInt(ary2[1],10)-parseInt(ary1[0],10)*60-parseInt(ary1[1],10);
alert(String(100+Math.floor(minsdiff/60)).substr(1)+':'+String(100+minsdiff%60).substr(1));
