accessors.js

const obj = {
  get name() {
    return this._name.toUpperCase();
  },
  set name(value) {
    this._name = value;
  },
  get id() {
    return this._id.toString(2); // Returns binary of a number
  },
  set id(value) {
    this._id = value;
  }
}

obj.name = 'Arfat';
obj.name;
// => 'ARFAT'

obj.id = 5;
obj.id;
// => '101