Calculate the day difference between two time

Question

I have two date format and I need to calculate the hour difference between both.

First date is current date. Second Date is in below format :

var depDate = 25092018  //ddmmyyyy
var depTime = 08:35 //hh:mm

new Date function doesn't take date in format ddmmyyyy. How can input depDate in new Date function

I want to check the difference between current date and depDate.

Can anybody help ?

Answer 1

Your date in variable depDate hasn't valid format. You need to validate format of it using regex in .replace(). Then use Date.prototype.getTime() getting numeric value of date.

var depDate = "25092018";  
var depTime = "08:35";
var dateStr = depDate.replace(/(\d{2})(\d{2})(\d{4})/, "$3-$2-$1")+"T"+depTime;
// dateStr => 2018-09-25T08:35

var timeDiff = Math.abs(new Date(dateStr).getTime() - new Date().getTime());
var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24)); 
// 1000 => to converting millisecond to second
// 3600 => to converting second to hour
// 24 =>   to converting hour to day                    
console.log(diffDays);