Recursion

The built-in Partial and Readonly utilities are shallow. Learn how to write your own DeepReadonly and DeepPartial utilities that penetrate every layer of nested objects by combining Generics, Conditionals, infer, Mapped Types, and Recursion simultaneously.

Learn how the built-in Awaited<T> utility models the runtime await keyword. We explore how to combine the infer keyword with Recursive Type Aliases to drill down and unwrap Promises infinitely deep, and how to compose it with ReturnType for async functions.