It is worth noting there are good options out there to get both compile time type safety and runtime validation using TypeScript. Personally I’m a fan of ts-re

It is worth noting there are good options out there to get both compile time type safety and runtime validation using TypeScript. Personally I’m a fan of ts-rest: https://ts-rest.com/ https://ts-rest.com/ Write a specification of your endpoints in TypeScript, and from that one spec you get: - Server side validation of requests/responses - A TypeScript API client - Specialized clients, if you like, for example a react-query client if you like using react-query - Auto-generated docs (OAS) - TypeScript types for requests and responses to use in your code IMO a lot more maintainable than a jsdoc based approach. For example, you can define a type for a Person, and then re-use that type in the responses of all Person-related endpoints, and even in POST/PUT/PATCH bodies (saying things like “the POST body is a person Person, but omit the id field”). With jsdoc you’re repeating that definition a tonne, AND you’re lacking compile time type safety.