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2c7dea7365
During server rendering, a visible Offscreen subtree acts exactly like a fragment: a pure indirection. A hidden Offscreen subtree is not server rendered at all. It's ignored during hydration, too. Prerendering happens only on the client. We considered prerendering hidden trees on the server, too, but our conclusion is that it's a waste of bytes and server computation. We can't think of any compelling cases where it's the right trade off. (If we ever change our mind, though, the way we'll likely model it is to treat it as if it's a Suspense boundary with an empty fallback.)
react-server
This is an experimental package for creating custom React streaming server renderers.
Its API is not as stable as that of React, React Native, or React DOM, and does not follow the common versioning scheme.
Use it at your own risk.