1582 articles
A comprehensive guide to every React hook — useState, useEffect, useCallback, useMemo, useRef, useTransition, and more — with real-world usage patterns and common mistakes to avoid.
useOptimistic is a React 19 hook that lets you show an immediately updated UI while an async server operation is in progress, then reconcile the real result when it arrives. Learn how to implement it correctly with rollback handling.
React 19 ships dedicated hooks for handling form state and submission status. Learn how useFormStatus, useFormState, and the new useActionState hook simplify form handling in Next.js App Router without complex state management.
React Suspense enables progressive rendering — showing fallback UI while components load asynchronously. In Next.js App Router, Suspense powers HTML streaming, route-level loading states, and lazy-loaded components. Learn how to use it effectively.
Context API, Zustand, and Redux all manage global state but with very different trade-offs. This guide shows exactly when to use each one, with practical code examples and a comparison of bundle size, performance, and developer experience.