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React 19: New API use(promise)
is being used to display a fallback until the promise is resolved. - The function fetchMessages returns a promise, which could be a fetch request in a real-world example.
- React 19 introduces the use of 'use' to achieve similar result as 'await' with promises.
- Rendering behavior differs between server-side rendering and client-side rendering when using 'use' with promises.
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