fetchUserByIdfulfilled
fetchUserByIdfulfilled is a term used in asynchronous programming to denote the successful completion of a fetch operation that retrieves a user by their identifier. In many modern JavaScript applications, similar terms appear as part of a promise or thunk lifecycle, with a common pattern of naming action types as fetchUserById/fulfilled. The concatenated form fetchUserByIdfulfilled may occur in systems that use non-delimited identifiers or as a custom event name in messaging frameworks.
Payload and semantics: When invoked successfully, the fulfilled event carries a payload containing the user data
Usage in state management: The fulfilled action signals UI components and reducers that the requested user
Relation to API design: In a RESTful pattern, the operation corresponds to a GET request to /users/{id}.
Notes: If the fetch fails, a corresponding fetchUserByIdrejected action would be dispatched instead; error handling should