How to get total minutes of difference between two dates using pure JavaScript

Question

Updated My Question

How to get total minutes of difference between two dates using pure JavaScript when

Condition (1):: Same month, same year but date changes

newDate: 18/10/2016 0:50
oldDate: 17/10/2016 23:05

Condition (2):: Last date of current month and 1st date of next month

newDate: 1/11/2016 0:50  
oldDate: 31/10/2016 23:05

Condition (3):: Last date of year and 1st date of new year

newDate: 1/1/2017 0:50  
oldDate: 31/12/2016 23:05

Note: Please have a look newDate and oldDate to understand the conditions.

Thanks

Parse the string and create `Date` objects from them, and compare those. — Barmar, Oct 18 '16 at 05:37
Duplicate http://stackoverflow.com/questions/1787939/check-time-difference-in-javascript l2 google. — Darkrum, Oct 18 '16 at 05:38
this could also help you http://stackoverflow.com/questions/25150570/get-hours-difference-between-two-dates-in-moment-js — Geeky, Oct 18 '16 at 05:39
@Darkrum thanks for your help, going to delete this question soon — Kirankumar Dafda, Oct 18 '16 at 05:39
You can down vote the question how many times you want via comment too. — Kirankumar Dafda, Oct 18 '16 at 05:54
Can anyone suggest me the link to fulfill last 3 conditions without using any js library ? — Kirankumar Dafda, Oct 18 '16 at 06:05

Kirankumar Dafda · Answer 1 · 2016-10-19T10:51:50.127

0

Completed My Requirements with the below pure JavaScript code

In my code starttime and endtime are

//var startTime = localStorage.getItem("starttime");
//var endTime = new Date();

Example Here.

var startTime = new Date("Sat Dec 31 2016 15:35:57 GMT+0530 (India Standard Time)");
var endTime = new Date("Sun Jan 1 2017 15:35:57 GMT+0530 (India Standard Time)");

var totalMiliseconds = endTime - startTime;
alert(totalMiliseconds);
//output:: 86400000

var totalSeconds = totalMiliseconds/1000;
alert(totalSeconds);
//output:: 86400

var totalMinuts = totalSeconds/60;
alert(totalMinuts);
//output:: 1440

var totalHours = totalMinuts/60;
alert(totalHours);
//output:: 24

And this fulfill my all 3 conditions.

Thank You For Your Support !!!

edited Oct 19 '16 at 10:51

answered Oct 18 '16 at 11:09

Kirankumar Dafda

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Do not parse strings with the Date constructor (or Date.parse, they are equivalent for parsing). Always use a parse function or library. – RobG Oct 19 '16 at 01:49
I have stored start time and date into localstorage so while reusing the same date I need to parse it with date constructor. – Kirankumar Dafda Oct 19 '16 at 10:48
1

You do not **need** to use the Date constructor, it's a poor choice for parsing. Use a simple parse function or one of the many good parsing and formatting libraries like [*fecha.js*](https://github.com/taylorhakes/fecha) or [*moment.js*](http://momentjs.com). – RobG Oct 20 '16 at 03:29
but as I have mentioned before that already I have added many js libraries like scrollbox.js touchswipe.js and other so do not wants to add one more. Thanks btw @RobG – Kirankumar Dafda Oct 20 '16 at 04:53
If you don't want to use a library (fecha.js is just 2k), write a simple function to parse your particular format. – RobG Oct 20 '16 at 23:26

score 0 · Accepted Answer · answered Oct 20 '16 at 23:55

0

Since you don't want to use a library for parsing date strings, you can write a simple function such as:

// Parse date string in "Sat Dec 31 2016 15:35:57 GMT+0530 (India Standard Time)" format
function parseDate(s) {
  // Split into tokens
  var b = s.match(/\w+/g) || [];
  var months = 'jan feb mar apr may jun jul aug sep oct nov dec'.split(' ');
  // Determine offset in minutes
  var offSign = /GMT+/.test(s)? -1 : 1;
  var offset = b[8].substr(0,2)*60 + +b[8].substr(2,2);
  // Create date, applying offset to minutes
  var date = new Date(Date.UTC(b[3],
             months.indexOf(b[1].toLowerCase()), 
             b[2], 
             b[4],
             +b[5] + (offSign*offset),
             b[6]));
  return date;
}

var d = parseDate("Sat Dec 31 2016 15:35:57 GMT+0530 (India Standard Time)")
console.log('UTC: ' + d.toISOString() + '\n' +
            'Local: ' + d.toLocaleString());

answered Oct 20 '16 at 23:55

RobG

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Great !!! Now can you please explain how do i get total difference of time by dividing new date minus old date ? – Kirankumar Dafda Oct 21 '16 at 05:15
1

You can get the difference between two dates in milliseconds simply by subtracting one from the other, e.g. for one day: `new Date(2016,0,2) - new Date(2016,0,1)`, there are [*many questions about that already*](http://stackoverflow.com/search?q=%5Bjavascript%5D+difference+between+dates). ;-) – RobG Oct 21 '16 at 05:53
This is much better, I haven't tried your code in my project but I appreciate your answer and replies. – Kirankumar Dafda Oct 21 '16 at 10:10

How to get total minutes of difference between two dates using pure JavaScript

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