getters & setters Object

var person = {
  firstname: "Albert",
  lastname: "Einstein",
  get fullname() {
    return this.firstname +" "+this.lastname;
  },
  set fullname(_name){
    var words = _name.toString().split(' ');
    this.firstname = words[0];
    this.lastname = words[1];
  }
};
person.fullname = "Issac Newton";
console.log(person.firstname); //"Issac"
console.log(person.lastname);  //"Newton"
console.log(person.fullname);  //"Issac Newton"

var person = {
  firstname: "Albert",
  lastname: "Einstein",
};
Object.defineProperty(person, 'fullname', {
  get: function() {
    return this.firstname + ' ' + this.lastname;
  },
  set: function(name) {
    var words = name.split(' ');
    this.firstname = words[0];
    this.lastname = words[1];
  }
});
person.fullname = "Issac Newton";
console.log(person.firstname); //"Issac"
console.log(person.lastname);  //"Newton"
console.log(person.fullname);  //"Issac Newton"