React Hooks Complete Guide Part 2: Performance, React 19, and Next.js Hooks Explained

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Developer Abrar Galib has published Part 2 of a comprehensive React Hooks guide on DEV Community, building on the core and advanced hooks covered in Part 1. This installment covers performance hooks such as useTransition and useDeferredValue, which help keep apps responsive during heavy updates by letting React prioritize urgent work. The guide also details hooks for external data, library authors, and form handling, including useActionState, useOptimistic, and the use hook introduced in React 19. Next.js-specific hooks like useRouter, usePathname, and useLinkStatus are explained alongside newer React 19.3 features such as ViewTransition and Fragment Refs. The guide concludes with a section on custom hooks, common mistakes, and a developer cheatsheet, with all content confirmed compatible with React 19 and its latest stable release.

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