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This article explores React 19's new React Compiler, explains how it automatically memoizes components to cut redundant renders, and walks through three practical examples that compare its behavior with traditional React.memo, useMemo, and useCallback techniques.
This article introduces the new React 19 APIs—including the versatile use API for data fetching and conditional context, resource preloading helpers, enhanced Actions with useTransition, useActionState, useFormState, useOptimistic, as well as deprecations, improved hydrate error messages, and the experimental React Compiler—providing code examples and migration guidance.
React Conf 2024 showcased the upcoming React 19 beta with new Actions hooks, server components, ref-as-prop, metadata support, resource preloading, and the experimental React Compiler, while also announcing the merger of Remix into React Router v7, offering developers a comprehensive overview of the latest frontend innovations.