How do you keep a React codebase maintainable as it grows?
By grouping files by feature, keeping components focused, extracting reusable primitives, using clear naming, and refactoring when repetition appears. Avoid over-engineering and over-abstracting, which make the code harder to change.
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More FAQs in React UI Setup and Component Design Interview Questions
By hierarchy: pages at the top, feature components in the middle, reusable primitives at the bottom. Grouped by feature, with one-way data flow and state at the right level. This keeps the app maintainable as it grows.
When the same UI pattern appears in multiple places, I extract a reusable component configured by props. I extract after seeing real repetition, not preemptively, to avoid premature abstraction whose cost outweighs the benefit.
A Layout component with the persistent UI and an Outlet, nested routes for pages as children, responsive behavior planned early, and a simple shell initially. Auth checks often live in the layout to centralize them.
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