How to calculate difference between two dates using Node.js?

Question

I need to calculate the datetime difference using the node.js. I am using the dateformat package to get current datetime format. My code is below:

var dateFormat = require('dateformat');
var prev_date=2017-08-09T19:00:58+0530;
var now = new Date();
var current_date=dateFormat(now, "isoDateTime");

Here I have already the previous date and also the current datetime also. I need to calculate the difference between two dates in hour, minute and second separately.

Answer 1

let firstDate = new Date("7/13/2016"),
    secondDate = new Date("09/15/2017"),
    timeDifference = Math.abs(secondDate.getTime() - firstDate.getTime());

console.log(timeDifference);
alert(timeDifference)

If you want the number of days between the two dates...

let differentDays = Math.ceil(timeDifference / (1000 * 3600 * 24));

console.log(differentDays);
alert(differentDays);

You could also use Moment.js https://momentjs.com/docs/

console.log(moment.utc(moment(firstDate,"DD/MM/YYYY HH:mm:ss").diff(moment(secondDate,"DD/MM/YYYY HH:mm:ss"))).format("HH:mm:ss"))