TypeScript: Gradual, Structural, Dynamic, Static
summary
Builds a TypeScript type layer over an Express-style API that compiles and flags real bugs: typos in param names, wrong HTTP methods, and invalid status numbers. Uses generic types and string template literal types to infer route parameters and pipe them into Request/Response shapes, and enumerates status codes 100–599 (about 500 explicit values) so calls autocomplete and fail fast. The example types are recursive, practical, and work against plain JavaScript runtime code.
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chapters (8)
- 0:00Introduction and setup
- 3:00Analyzing the API
- 5:12Defining strong types
- 9:11Refining with literal types
- 13:18Utilizing generics
- 17:17Advanced template literals
- 21:59Advanced parameter parsing
- 27:00Conclusion and wrap-up
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