Mastering JavaScript

Getters and setters

Getters are convenient methods to get the value of specific properties; as the name suggests, setters are methods that set the value of a property. Often, you may want to derive a value based on some other values. Traditionally, getters and setters used to be functions such as the following:

var person = {
  firstname: "Albert",
  lastname: "Einstein",
  setLastName: function(_lastname){
    this.lastname= _lastname;
  },
  setFirstName: function (_firstname){
    this.firstname= _firstname;
  },
  getFullName: function (){
    return this.firstname + ' '+ this.lastname;
  }  
};
person.setLastName('Newton');
person.setFirstName('Issac');
console.log(person.getFullName());

As you can see, setLastName(), setFirstName(), and getFullName() are functions used ...