add time to date in javascript without using library [duplicate]

Question

I need to add the current time to a date, but there is no way to do it

const d = new Date();
const time = {
  seconds: d.getSeconds(),
  minuts: d.getMinutes(),
  hours: d.getHours(),
  mills: d.getMilliseconds()
}

const dd = new Date("2022-11-21");
let newDate = `${dd}T${time.hours}:${time.minuts}:${time.seconds}.${time.mills}Z`
let ff = new Date(newDate)
console.log(d.toISOString());
console.log(ff.getUTCDate());

Answer 1

If you want the current time to a past date, you should just grab the time from d and stick it on dd

const d = new Date();

const dd = new Date("2022-11-21");
dd.setSeconds(d.getSeconds())
dd.setMinutes(d.getMinutes())
dd.setHours(d.getHours())
dd.setMilliseconds(d.getMilliseconds())

console.log(dd)