TypeScript for Production Applications

Your code compiles, yet production keeps surprising you with strings where numbers should be, missing fields and errors nobody planned for. This book closes the gap between what the compiler promises and what real traffic delivers. You will configure strict compiler and lint settings, treat every boundary as untrusted until a schema has parsed it, and derive types from those schemas so they never drift. You will model your domain with unions and distinct types, structure API handlers in testable layers, turn expected failures into typed results with one consistent error format, and write tests that cover what types cannot. Chapters on maintainable patterns, safe deployment and evolving an API without breaking clients complete the picture. Written for developers who already know the basics.