#React 19

6 articles tagged with React 19

Migrating a Real App to React Compiler: What Actually Broke

The production React Compiler postmortem. Migrating a 120,000-line Next.js app to React 19 Compiler: manual memoization removal, mutation violations, and ESLint rule fixes.

8/1/202625 min read

React 19 Compiler: Goodbye useCallback & useMemo, Hello Auto-Memoization

The React Compiler is standard in React 19. Learn how the Babel/SWC build tool automatically memoizes component props, state, and callbacks without manual dependency arrays.

7/20/202614 min read

Advanced Server Actions Patterns in Next.js 15: Forms, Mutations & Optimistic UI

Go beyond the basics. Learn advanced Server Actions patterns — progressive enhancement, optimistic updates, action chaining, and error boundaries — for production Next.js 15 apps.

7/19/202616 min read

React 19 Form Actions: Form Handling with useActionState & useOptimistic

React 19 is rewriting how we handle forms. Discover how Server Actions, useActionState, useFormStatus, and useOptimistic eliminate complex loading and error states.

6/23/20268 min read

Demystifying React Server Components (RSC) Wire Protocol: Crafting a Custom Parser

Deep dive into the RSC chunked stream serialization protocol. Learn how React Server Components are encoded on the server and reconstructed in the browser.

6/1/202610 min read

React 19: Mastering the 'use' Hook for Promises and Context

The 'use' hook is the most versatile addition to React 19. Learn how to handle async data and context more elegantly than ever before.

2/23/20268 min read