dayjs add hours code example

Example 1: javascript add minutes to date

//add 30 minutes to date
var minutesToAdd=30;
var currentDate = new Date();
var futureDate = new Date(currentDate.getTime() + minutesToAdd*60000);

Example 2: javascript date add days

function addDays(originalDate, days){
  cloneDate = new Date(originalDate.valueOf());
  cloneDate.setDate(cloneDate.getDate() + days);
  return cloneDate;
}

let appointment = new Date("February 12, 2021 00:00:00");
let newAppointment = addDays(appointment, 7);

console.log(appointment.getDate()); // 12
console.log(newAppointment.getDate()); // 19

Example 3: date add hours javascript

Date.prototype.addHours = function(h) {
  this.setTime(this.getTime() + (h*60*60*1000));
  return this;
}