Breaking Down State of React 2025 Results

The State of React 2025 survey results are out. Explore what developers said about hooks, APIs, frameworks, React Server Components, and the tools shaping the React ecosystem today.

What's New in React 19.2

Learn what's new in React 19.2: Activity for state-preserving UI, useEffectEvent for cleaner effects, compiler-powered ESLint rules, and Performance Tracks in DevTools.

React Compiler: No More useMemo and useCallback

React Compiler automatically optimizes your components at build time. No more useMemo, useCallback, or React.memo. Learn how to set it up and what you need to know.

Starting a React Project? shadcn/ui, Radix, and Base UI Explained

Understand unstyled component libraries, compare Radix and Base UI, and learn how shadcn/ui and shadcn/create help you build React apps your way.

Controlled vs Uncontrolled Components in React

Understanding controlled vs uncontrolled in React is about one question: who owns the state? Learn both meanings for form inputs and component design patterns.

React Free Weekend: 48 hours of Open Access to Premium React Certification Training

Every year, we at Certificates.dev look for ways to make our certifications more accessible - not just for teams inside big tech companies, but for every developer who wants to validate their skills through real-world, hands-on learning. That’s why we are excited to announce our first-ever React Free Weekend, taking place on November 15–16, 2025.

Error Handling in React with react-error-boundary

Learn how to handle errors in React applications with react-error-boundary. Explore fallback UIs, async error handling with useErrorBoundary, and React 19's automatic error boundary integration with form actions and useTransition.

Building Reusable Components with React 19 Actions

Build reusable React components with React 19 Actions using useTransition() and useOptimistic(). Learn how to track pending states, implement optimistic updates, and expose action properties for custom logic in the Next.js App Router with practical examples.

Building an Async Combobox with useSuspenseQuery() and useDeferredValue()

Learn how to build a responsive async combobox component using React's useDeferredValue() and useSuspenseQuery(). Discover how these concurrent features work together to create smooth user experiences with declarative loading states, optimistic updates, and automatic caching for search interfaces.