presentational-container-pattern

To separate business logic from UI rendering in React, split components into containers that manage data fetching and state, and presentational components that handle UI rendering. This separation of concerns pattern improves testability and reusability.

The container and presentational components pattern in React divides components by role: containers manage data fetching, state, and logic, while presentational components focus purely on UI rendering. This enforces separation of concerns and makes views easier to reuse across screens.

To test React components that mix data fetching and UI rendering, isolate the logic into container components or custom hooks, leaving presentational components pure. This makes testing easier because you can test UI rendering and data logic independently without mocking complex state.

Yes, you can use React hooks instead of container components to manage data logic. Encapsulating data fetching and state inside hooks reduces boilerplate and still preserves the separation of concerns, allowing presentational components to remain pure and focused on UI rendering.

You should avoid the presentational and container pattern in React for simple UIs lacking complex data flow or state management needs. It adds unnecessary boilerplate for basic components, so apply it only to moderately complex interfaces where explicit data separation improves maintainability.

The best way to structure React apps for reusability is to enforce separation of concerns by using the presentational and container pattern. Isolate UI rendering in pure presentational components and manage data fetching in containers or hooks, enabling components to be reused across different screens.