function addDays(date, days) { var result = new Date(date); result.setDate(result.getDate() + days); return result; }
let date = new Date(); // add a day date.setDate(date.getDate() + 1);
var myCurrentDate=new Date(); var myFutureDate=new Date(myCurrentDate); myFutureDate.setDate(myFutureDate.getDate()+ 8);//myFutureDate is now 8 days in the future