JavaScript Polymorphism

The polymorphism is a core concept of an object-oriented paradigm that provides a way to perform a single action in different forms. It provides an ability to call the same method on different JavaScript objects. As JavaScript is not a type-safe language, we can pass any type of data members with the methods.

JavaScript Polymorphism Example 1

Let's see an example where a child class object invokes the parent class method.

Output:

A is invoked

Example 2

Let's see an example where a child and parent class contains the same method. Here, the object of child class invokes both classes method.

Output:

A is invoked
B is invoked

Example 3

Let's see the same example with prototype-based approach.

Output:

A is invoked
B is invoked