TypeScript generics are a powerful feature that allows you to write flexible, reusable code while maintaining type safety. If you've ever found yourself writing duplicate code for different types, generics are the answer.

What are Generics?

Generics allow you to define a component (function, class, or interface) that can work over a variety of types rather than a single one. It's like a variable for types.

Example

function identity<T>(arg: T): T { return arg; }

In this example, T captures the type of the argument provided, allowing us to use it as the return type.

Why Use Them?

Generics provide a way to create reusable components that are still type-safe. They are essential for building robust libraries and applications.