JavaScript : Object-Oriented Programming

Taking advantage of polymorphism

We can use the same method, the same name, and same arguments to cause different things to happen according to the class in which we invoke a method. In object-oriented programming, this feature is known as polymorphism.

For example, consider that we define a talk method in the Animal class. The different subclasses of Animal must override this method to provide its own implementation of talk.

A Dog class will override this method to print the representation of a dog barking, that is, a Woof message. On the other hand, a Cat class will override this method to print the representation of a cat meowing, that is, a Meow message.

Now, let's think about a CartoonDog class that represents a dog that can really talk as part ...