No, it is generally not recommended for a custom React hook to return JSX. Custom hooks in React are designed to encapsulate logic and state management for reuse across multiple components, not to handle rendering or return UI elements. The primary purpose of a custom hook is to provide a mechanism to share logic and stateful behavior without tying it to a specific UI representation.
Including JSX directly within a custom hook contradicts the separation of concerns principle, where logic and UI should be kept separate. This separation allows for better maintainability, testing, and reusability of the code. When JSX is included in a hook, it can lead to issues such as reduced flexibility in using the hook across different components, performance implications due to unnecessary re-renders, and challenges in testing the hook independently of the UI[1][2].
For instance, if a hook includes JSX, it becomes less flexible and harder to reuse because the UI part is tightly coupled with the logic. This coupling makes it difficult to use the same hook with different UI implementations or in contexts where the UI might not be needed at all[1][2].
