CODEWITHSUNDEEP
javascriptdate
Tarik
Tarik

Reputation: 159

How I will get difference between two Month(YYYYMM) in JavaScript?

var frommonth="201912";
var tomonth="201810";

From Above Two Month how i will get difference between two Month in JavaScript?

var date1 = new Date(fromdate);
var date2 = new Date(todate);
var timeDiff = Math.abs(date2.getTime() - date1.getTime());
var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24)); 

var fromYear=date1.getFullYear();
var toYear=date2.getFullYear();
var diffyear =toYear-fromYear;

Upvotes: 2

Views: 230

Answers (2)

Maniraj Murugan
Maniraj Murugan

Reputation: 9084

You can pass the frommonth and tomonth to the function as parameters and can perform calculation of difference..

Here new Date(frommonth.substring(0,4), frommonth.substring(4), 0) denotes,

-> frommonth.substring(0,4) => Getting the year from the string

-> frommonth.substring(4) => Getting the month from the string

-> 0 => Setting up date as 0.

And the same has been considered for tomonth as well..

Also Math.round(timeDiff / (2e3 * 3600 * 365.25)); is made to consider the leap year as well..

const frommonth = "201912"; 
const tomonth = "201810";


const diffInMonths = (end, start) => {
   var timeDiff = Math.abs(end.getTime() - start.getTime());
   return Math.round(timeDiff / (2e3 * 3600 * 365.25));
}

const result = diffInMonths(new Date(frommonth.substring(0,4), frommonth.substring(4), 0), new Date(tomonth.substring(0,4), tomonth.substring(4), 0));

//Diff in months
console.log(result);

Upvotes: 0

User863
User863

Reputation: 20039

new Date() dont parse YYYYMM. It consider 201912 as year

So Use match() to parse YYYYMM

var from = "201912";
var to = "201810";

function parseMonth(str) {
  return str.match(/(\d{4})(\d{2})/).splice(1).map(Number)
}

var [fromY, fromM] = parseMonth(from)
var [toY, toM] = parseMonth(to)

var result = (fromY - toY) * 12 + (fromM - toM)

console.log(result, 'months')

Upvotes: 2

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