Building asynchronous user interfaces has traditionally been a challenge due to the need for manual coordination of operations, such as navigation, form submissions, and data fetching, which often leads to bugs and inconsistent user experiences. React has introduced a set of declarative primitives, collectively known as "Async React," that address these coordination issues by providing automated handling for asynchronous operations. These primitives, including useTransition, useOptimistic, Suspense, useDeferredValue, and use(), allow developers to create responsive and seamless user interfaces by automating state management, error handling, and loading states. The integration of these primitives into the React ecosystem is supported by frameworks like Next.js and libraries like TanStack Query, which facilitate smoother transitions and data fetching. This shift towards declarative async coordination marks a significant change in how React applications are built, reducing the need for manual orchestration and enhancing the overall user experience.