How to find the difference between two dates in months?

Question

JavaScript

Find the difference between two dates in months. There is a solution:

let date1 = new Date(1980,01,26,23,59,59);
let date2 = new Date(2020,07,16,23,59,59);
let diff = date1.getTime() - date2.getTime();
console.log(diff/(1000 * 60 * 60 * 24 * 31 ));

But it does not quite fit, because a month can have 30 and 28 and 29 days. What methods can be used to solve this problem?

Answer 1

momentjs

Answer 2

let date1 = new Date(1980,01,26,23,59,59);
let date2 = new Date(2020,07,16,23,59,59);
let diff = (date2.getDate() - date1.getDate()) / 30 +
date2.getMonth() - date1.getMonth() +
(12 * (date2.getFullYear() - date1.getFullYear()));
console log(diff);
Or so, if you do not use moment js.