What's the difference between handleBotRequest and handleBrowserRequest in the default entry.server.tsx?

[kotx]

It seems that handleBotRequest uses onAllReady rather than onShellReady, but what's the difference?
It's not covered in the docs, which use a much simpler version of entry.server.tsx.

[brophdawg11]

These are React streaming APIs - you can read about them over on the React docs - https://react.dev/reference/react-dom/server/renderToPipeableStream

Specifically, onAllReady essentially disables streaming and sends the complete HTML document at the end:

onAllReady: A callback that fires when all rendering is complete, including both the shell and all additional content. You can use this instead of onShellReady for crawlers and static generation. If you start streaming here, you won’t get any progressive loading. The stream will contain the final HTML.