TypeScript is easy to start but hard to master. Many developers stop at basic interfaces and types, missing out on the powerful inference engine that can drastically reduce runtime errors and improve developer experience through autocomplete.
Generics: The Power of Reusability
Generics allow you to write flexible, reusable code components that work with a variety of types rather than a single one. Think of them as variables for types. They are essential for building utility libraries and hooks.
"Don't write the code for the type; write the type for the code. Let inference do the heavy lifting."
Mapped Types and Conditional Types
Advanced patterns involve creating types based on other types. Mapped types allow you to transform properties (e.g., making all keys optional or readonly), while conditional types allow you to choose types based on logic inputs, similar to ternary operators in JavaScript.
