TypeScript 2.x By Example

Inheritance

Inheritance is one of the features of object-oriented programming, and TypeScript allows us to use this feature in writing code for JavaScript. Inheritance is a behavior of extending an existing class with additional features to create subclasses. The advantage of inheritance is code reuse; we can have common properties and methods defined in the parent class and have child classes inherit those properties and methods. We can then add specific functionalities to them. 

To create a child class, TypeScript defines a keyword, extends, which is added to the child class followed by the name of the parent class.

The following is the example of implementing inheritance: 

As we can see on line number 9, we created a new class, TypeScript ...