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Progressive JSON

Why streaming isn't enough.

It’s just too hard to actually take advantage of it in the application logic which generally assumes the types are correct, “ready” means “complete”, and so on. As long as the client can deal with some parts being “not ready” (represented as Promises) and process the rest, this is an improvement! The data arrives as fast as it can in whatever order the server is ready to send it, but React takes care to present the loading sequence gracefully and let the developer control the visual reveal.

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