get the time difference between two times in format hh:mm:ss

Question

I have two times in HH:mm:ss format. I am trying to calculate the time difference between two times. like

 var timeStart = '01:00:24';
   var timeEnd = '01:00:34'
  var timeDiff = timeEnd - timeStart; 

How can i perform this with a javascript

Answer 1

you can prepone to both a fixed date and do the subtraction:

var start = '01:00:24';
var end = '01:00:34';
start = '2017-11-8' + start;
end = '2017-11-8' + end;
var diff = +end - +start; // outputs 10000 (in ms)

Answer 2

You can split them with : and take difference. And again join them with :

 var start = '01:00:24'; var end = '01:00:34'; var diff = start.split(':').map((item,index) => end.split(':')[index] - item).join(':') console.log(diff)