TypeScript expands JavaScript’s capabilities by offering robust support for object-oriented programming (OOP) principles, particularly inheritance and polymorphism. Here’s how TypeScript helps you create scalable and powerful applications using these concepts:

Inheritance in TypeScript

Inheritance enables you to build hierarchies between classes, so that child classes inherit members (fields, methods) from parent classes.

Example:

class Animal { speak () { console . log ( ' The animal makes a sound ' ); } }

class Dog extends Animal { speak () { console . log ( ' The dog barks ' ); } }

const dog = new Dog (); dog .…