JSFiddle - React, Tailwind, and code Playground

JavaScript

var old_date = "2010-11-15 07:30:40";
var new_date = "2010-11-11 08:03:22";

var old_date_obj = new Date(Date.parse(old_date));
var new_date_obj = new Date(Date.parse(new_date));

var diffMs = Math.abs(new_date_obj - old_date_obj);
var diffDays = Math.round(diffMs / 86400000); // days
var diffHrs = Math.round((diffMs % 86400000) / 3600000); // hours
var diffMins = Math.round(((diffMs % 86400000) % 3600000) / 60000); // minutes
alert("days:"+diffDays+"\nhours:"+diffHrs+"\nminutes:"+diffMins);