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Use renderToPipeableStream wired up to a ReadableStream to add streaming support #2

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maxshirshin
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This is a first MVP that uses renderToPipeableStream wired up to a ReadableStream instance.

Unlike directly using renderToReadableStream, this still streams (the throbber rotates on the page) but doesn't throw a stream close error and doesn't break HTML markup.

src/delays.js Outdated Show resolved Hide resolved
Comment on lines +20 to +21
// We have this in Oxygen and can expose it
globalThis.Buffer = globalThis.Buffer || {

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Alternatively, perhaps we could get react to not depend on it. If not, another approach would be to have hydrogen polyfill it.

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We already have Buffer in Oxygen, because it was a dependency of some other polyfill, it's just not exposed. So we can expose it and it will work.

@@ -3,8 +3,7 @@ import { DataProvider } from "./data";
import { ABORT_DELAY, API_DELAY } from "./delays";
import {
renderToPipeableStream,
renderToReadableStream,
} from "react-dom/server";
} from "react-dom/cjs/react-dom-server.node.development";

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It looks like this is using node specific code. Actually, that looks like that was already the case with renderToPipeableStream.

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I had to provide a very specific path because we set the target to webworker, and so yarn imports browser-specific stuff but we need the node implementation.

As for the node-specific code, it only uses setImmediate and Buffer.from so far, we have Buffer and setImmediate is easy to polyfill (or can be implemented natively in Oxygen). The renderToReadableStream implementation didn't use any specific node stuff but it sits in react-dom-server.browser.development.js which suggests it might be eventually using browser-specific APIs. React doesn't target workers as a platform yet, but if we get React streaming to production quality in Oxygen, this can change.

Co-authored-by: Dylan Thacker-Smith <[email protected]>
@jplhomer
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This has since been fixed upstream in React facebook/react#23342

@jplhomer jplhomer closed this Feb 23, 2022
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3 participants