TypeScript Generics: A Practical Guide

Generics enable reusable, type-safe code. They let you write functions and classes that work with any type while maintaining type information.

Basic Generics#

Generic Constraints#

Generic Interfaces and Types#

Generic Classes#

Utility Types with Generics#

Generic Functions in Practice#

Conditional Types#

Mapped Types#

Best Practices#

Conclusion#

Generics are essential for writing reusable, type-safe TypeScript code. Start with simple type parameters, add constraints when needed, and use utility types to transform existing types. The type system becomes a powerful tool for catching errors at compile time.