get hour from date js code example

Example 1: javascript get 1 hour from now

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

Example 2: js date get hours

const birthday = new Date('March 13, 08 04:20');

console.log(birthday.getHours());
// expected output: 4