How do I calculate a duration time?

Question

I am developing a web-based application to capture start time and end time from system date-time but my main problem is that I don't know how can I get the duration time, between start and end time for downtime.

 //Function to get current start time
  var startTime = setInterval(function () { start() }, 1000);

  function start() {
    var startDate = new Date();
    var timeStart = startDate.toLocaleTimeString();
  $("#setCount").html(timeStart);
 }

Sergio · Answer 1 · 2013-03-19T07:43:03.703

50

Do you mean this:

var date1 = new Date();
var date2 = new Date();
var diff = date2 - date1; //milliseconds interval

upd

check JSFiddle

edited Mar 19 '13 at 07:43

answered Mar 19 '13 at 07:17

Sergio

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yes man ,but can i be able to get time that will start from the start of a downtime that will keep on counting until downtime finishes ?using your method ? – Bonesh Mar 19 '13 at 07:35
1

don't really get what you need there, but added link to JSFiddle, hope it'l help you – Sergio Mar 19 '13 at 07:43

score 16 · Answer 2 · edited May 23 '17 at 11:54

Update:

If you want to display the time difference to user, Serigo's method will do it. But if it is for any development purposes, below functions will make your life easy.

Just wanted to let you know about this console utility functions.

Put this line in top of your app initialization code console.time('appLifeTime');

Put this one in where ever you feel that your app ends. console.timeEnd('appLifeTime');

console.time('appLifeTime');

setTimeout(function delay(){
  console.timeEnd('appLifeTime');
}, 1500);

The above code piece will print, appLifeTime: 1500.583ms.

AFAIK, console.time & console.timeEnd works in firefox(with firebug) & webkit browsers(chrome, safari).

score 9 · Answer 3 · answered Mar 19 '13 at 07:16

To simply measure time elapsed, use Date.getTime() which outputs current time in milliseconds since unix epoch.

You can substract one millis value from another to get the duration.

Example:

var startTime = new Date().getTime();

setTimeout(function () {
  var endTime = new Date().getTime();
  console.log("duration [ms] = " + (endTime-startTime));
}, 1500);

Output would be, of course: duration [ms] = 1500 (or couple ms less or more).

Igor Sukharev · Answer 4 · 2019-10-09T08:07:57.683

I have this function to show the time distance between two dates:

export const timeDistance = (date1, date2) => {
  let distance = Math.abs(date1 - date2);
  const hours = Math.floor(distance / 3600000);
  distance -= hours * 3600000;
  const minutes = Math.floor(distance / 60000);
  distance -= minutes * 60000;
  const seconds = Math.floor(distance / 1000);
  return `${hours}:${('0' + minutes).slice(-2)}:${('0' + seconds).slice(-2)}`;
};

The output in the format h:mm:ss hours can grow arbitrary.

score 1 · Answer 5 · answered Mar 19 '13 at 07:15

Use this nifty jQuery plugin: http://timeago.yarp.com/

Timeago is a jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago" or "about 1 day ago"). Download, view the examples, and enjoy.

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How do I calculate a duration time?

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