var myCurrentDate=new Date();
var myPastDate=new Date(myCurrentDate);
myPastDate.setDate(myPastDate.getDate() - 8);//myPastDate is now 8 days in the pastconst date1 = new Date('7/13/2010');
const date2 = new Date('12/15/2010');
const diffTime = Math.abs(date2 - date1);
const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24));
console.log(diffTime + " milliseconds");
console.log(diffDays + " days");var diff = Math.abs(new Date('2011/10/09 12:00') - new Date('2011/10/09 00:00'));
var date = new Date();
date.setDate(date.getDate() + days);
date.setMonth(date.getMonth() + months);
date.setFullYear(date.getFullYear() + years);
console.log((date.getMonth() ) + '/' + (date.getDate()) + '/' + (date.getFullYear()));