typescript-advanced-patterns

TypeScript exhaustive switch checking uses discriminated unions to guarantee all possible cases are handled. By leveraging this pattern, the compiler enforces that every state or API result variant is explicitly processed, preventing unhandled cases at runtime.

Branded nominal types in TypeScript prevent mixing primitive values by tagging base types with unique identifiers. This pattern ensures that distinct domain values like IDs, currencies, and paths are structurally incompatible, catching misuse during compilation.

Yes, Zod schema inference validates runtime inputs while automatically generating matching TypeScript types. This integrates runtime parsing with compile-time checks, ensuring that API inputs conform to domain models without manual type duplication.

The best way to build type-safe state machines is using discriminated unions alongside conditional types with infer. This approach models robust state transitions and API results, ensuring that invalid state changes fail at compile time.

TypeScript supports template literal types and the satisfies operator for domain modeling. These features allow you to enforce string format constraints and validate object shapes against expected types without widening the inferred type.