coding-guidelines

To make React components testable and maintainable, enforce props-driven state control, extract conditional UI into separate components, and apply a presenter pattern to separate display logic from business logic for predictable rendering.

The best way to refactor React components for state control is auditing for internal state, moving logic to utility functions, and refactoring conditionals into dedicated reusable components to ensure props-driven rendering.

A presenter pattern for React component design works by extracting display logic into a dedicated layer, enforcing separation of concerns so that components receive props predictably and remain easy to test without complex internal state.

Yes, these refactoring guidelines apply to React server components by enforcing props-driven state and clear separation of concerns, aligning component architecture and conditional rendering with server-component requirements.

You need to extract conditional UI in React when complex conditional rendering makes components hard to test and reuse, so moving these conditionals into dedicated separate components simplifies testing and improves maintainability.

React components fail test coverage due to internal state because unpredictable state mutations make rendering hard to control, so enforcing props-driven state and extracting logic improves testability and predictability.