typescript-advanced-patterns

Branded types implement nominal typing in TypeScript to differentiate structurally identical types like UserId and OrderId, catching assignment errors at compile time rather than runtime.

Zod schema inference provides type-safe APIs by validating runtime data against a schema and automatically inferring the matching TypeScript type, ensuring API requests and responses are strictly validated and type-checked.

Discriminated unions model distinct application states in TypeScript by narrowing object shapes based on a literal property, enabling exhaustive switch checking and compile-time guarantees for state handling.

You can encode domain constraints directly into TypeScript types using template literal types, conditional types, and branded types, shifting error detection to compile time and eliminating common runtime bugs.

Template literal types and conditional types are needed when building advanced type-safe patterns like type-safe event emitters, deriving and validating types dynamically based on string manipulations and conditions for compile-time error detection.