function Person(name) {
  if (!(this instanceof Person)) {
    return new Person(name);
  }
  this.name = name;
}

Person.prototype.greet = function () {
  return `Hi ${this.name}`;
};

function Widget(id) {
  this.id = id;
  return { id: id * 2 };
}

Widget.prototype.getId = function () {
  return this.id;
};

const p1 = Person('Zed');
const p2 = new Person('Nova');
const w = new Widget(5);

console.log(p1.greet(), p2.greet(), w.id, w.getId);