tsentials-union

You can model multiple API response outcomes by defining a tagged discriminated union that assigns distinct payloads to specific tags like success and failed, ensuring compile-time safety and eliminating untyped object returns.

TypeScript misses missing branches when service layer outcomes lack a shared discriminating tag. Using a tagged discriminated union with exhaustive pattern matching via match() forces the compiler to flag unhandled cases.

Exhaustive pattern matching eliminates unsafe object returns by requiring a handler for every tagged union branch. Construct outcomes using Union.of() and dispatch them through Union.match() to ensure complete type coverage.

Yes, you can use type guards to narrow specific branches by applying Union.is() for narrowing and Union.get() to safely extract the structured payload from a targeted failure or success branch.

The best way to type multiple workflow states carrying different structured data is encoding them in a compile-time-safe tagged discriminated union, allowing each branch to hold unique payload shapes safely.