Difference between two times in format (hh: mm: ss)

Question

I have two times, let say:

t1= '05:34:01' ;
t2= '20:44:44' ;

I want two evaluate difference between these two times in same format. Like the result of above must come as

t3= t2 - t1;  // 15:10:43 

What is the way to do it?

Answer 1

Highly recommend you include moment.js in your project if you need to handle time.

Example:

var t1 = moment('05:34:01', "hh:mm:ss");
var t2 = moment('20:44:44', "hh:mm:ss");
var t3 = moment(t2.diff(t1)).format("hh:mm:ss");

Working jsFiddle

To install moment.js in Node.js, simply do:

npm install moment (or for a global install sudo npm -g install moment)

And then in your Node.js, include it like so:

var moment = require('moment');

Edit: For 24h clock, change hh to HH.

Answer 2

I would also go with the moment.js but you could do:

function time_diff(t1, t2) {
   var parts = t1.split(':');
   var d1 = new Date(0, 0, 0, parts[0], parts[1], parts[2]);
   parts = t2.split(':');
   var d2 = new Date(new Date(0, 0, 0, parts[0], parts[1], parts[2]) - d1);
   // this would also work
   // d2.toTimeString().substr(0, d2.toTimeString().indexOf(' '));
   return (d2.getHours() + ':' + d2.getMinutes() + ':' + d2.getSeconds());
}

Answer 3

I also used momentjs but with duration and got correct different between times:

var t1 = moment('05:34:01', "HH:mm:ss");
var t2 = moment('20:44:44', "HH:mm:ss");

var start_date = moment(t1, 'YYYY-MM-DD HH:mm:ss');
var end_date = moment(t2, 'YYYY-MM-DD HH:mm:ss');
var duration = moment.duration(end_date.diff(t1));

var t3 = duration.hours() + ":" + duration.minutes() + ":" + duration.seconds();
alert(t3);
console.log(duration.hours());
console.log(duration.minutes());
console.log(duration.seconds());

Answer 4

try this

function time_diff(t1, t2) 
{
  var t1parts = t1.split(':');    
  var t1cm=Number(t1parts[0])*60+Number(t1parts[1]);

  var t2parts = t2.split(':');    
  var t2cm=Number(t2parts[0])*60+Number(t2parts[1]);

  var hour =Math.floor((t1cm-t2cm)/60);    
  var min=Math.floor((t1cm-t2cm)%60);    
  return (hour+':'+min+':00'); 
}

time_diff("02:23:00","00:45:00")