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 . speak (); // Output: The dog barks Enter fullscreen mode Exit fullscreen mode extends keyword establishes the relationship between Dog and Animal . Method overriding allows specialization in child classes. Polymorphism in TypeScript Polymorphism allows objects of different classes to be treated as objects of a common parent class, enabling flexibility and reuse.…