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A new React 19 feature that might have gone unnoticed: ReactDOMStatic.prerender(<App />) It's like the old renderToString API, but unlike renderToString, prerender will wait for Suspense boundaries to finish before returning the HTML.

Seb ⚛️ ThisWeekInReact.com

@sebastienlorber.com

12 Dec 2024

Definitively noticed that 😀 BTW wonder if this is exactly the same as this, or has subtle differences? github.com/facebook/doc...

github.comdocusaurus/packages/docusaurus/src/client/renderToHtml.tsx at main · facebook/docusaurusEasy to maintain open source documentation websites. - facebook/docusaurus

Ricky

@ricky.fm

the difference is that it only outputs the content instead of emitting a stream with the intermediate fallback states and then the content

12/12/24, 10:35 pm0 reposts1 like

Seb ⚛️ ThisWeekInReact.com

@sebastienlorber.com

13 Dec 2024

Ah great I don't use Suspense in Docusaurus 3 yet so that's probably why I didn't really see those intermediate states. Would it emit the JS to replace Suspense placeholders to the stream too?

Ricky

@ricky.fm

13 Dec 2024

It doesn’t have to because it waits for the content so there’s no placeholder to replace