React Component Architecture Without Premature Abstraction
Build React interfaces with clear composition, purposeful component boundaries, stable APIs, and abstractions earned through repetition.
React makes creating a component easy, but deciding where a component boundary belongs still requires judgment. A useful boundary gives a part of the interface a clear responsibility and a small, understandable public API.
Begin with the page and identify sections that can be understood independently: filters, results, product cards, pagination, and empty states. Extract a component when doing so improves readability, isolates meaningful behavior, or enables genuine reuse. File length alone is a weak reason.
Prefer composition over components controlled by a growing collection of boolean props. Slots, children, and focused variants allow callers to express structure without forcing one component to predict every future layout. Keep data transformation near the feature that understands it rather than hiding product rules inside generic UI elements.
Reusable components should handle interaction states consistently: focus, disabled behavior, loading, errors, and accessibility. Their APIs should describe intent rather than expose internal styling decisions.
Wait for evidence before building an abstraction. Two similar-looking cards may serve different purposes and evolve separately. Duplication is sometimes the information needed to discover the right shared pattern. Good React architecture is not measured by the fewest components or the most reuse; it is measured by how easily the team can understand and change the interface.
