15 React Component Principles & Best Practices for Better Software Architecture & Design

The article collects 15 React component principles for building cleaner, more maintainable, and more scalable applications. It frames them as opinions, not hard rules, and says the series is for readers who already know the fundamentals of React.

Reading notes

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• Prefer function components over class components because they are simpler to read and manage, with less state and lifecycle complexity. The article names error boundaries as the main exception.
• Use named components instead of anonymous ones to improve debugging, stack traces, navigation, and readability.
• Move helper functions outside components when they do not need closures, so the file reads more cleanly from top to bottom.
• Replace hardcoded repetitive markup with configuration objects and loops so updates happen in one place.
• Keep components small and focused so they are easier to read, test, maintain, and rerender for one responsibility.
• Destructure props instead of repeating props everywhere in the component.
• Keep the number of props small. The article says more than five props can be a sign that the component should be split, though it gives input fields as an exception.
• Group related primitive props into an object when the data belongs together.
• Avoid nested ternary operators and prefer explicit if-else blocks with clear return statements.
• Move list mapping out of the main component into a separate component so the top-level component stays focused on structure.
• Prefer hooks over HOCs and render props because hooks give a more direct and declarative way to reuse logic.
• Use custom hooks to encapsulate shared logic, reduce duplication, and make testing easier.
• Extract render functions or use separate components instead of nesting complex render functions inside a component.
• Use error boundaries so child component errors do not crash the whole app.
• Use Suspense to handle loading states for async operations in a more declarative way.
• The article ends by summarizing the 15 practices and says future articles will cover state management, testing, organization, and more.