fix

packages/docusaurus/src/client/renderToHtml.tsx

@@ -6,11 +6,31 @@
  */
 
 import type {ReactNode} from 'react';
-import {renderToReadableStream} from 'react-dom/server.browser';
+// @ts-expect-error: see https://github.com/facebook/react/issues/31134
+import {renderToReadableStream as renderToReadableStreamImpl} from 'react-dom/server.browser';
+import {
+  renderToString,
+  type renderToReadableStream as renderToReadableStreamType,
+} from 'react-dom/server';
 import {text} from 'stream/consumers';
 
+const renderToReadableStream: typeof renderToReadableStreamType =
+  renderToReadableStreamImpl;
+
 export async function renderToHtml(app: ReactNode): Promise<string> {
-  const stream = await renderToReadableStream(app);
-  await stream.allReady;
-  return text(stream);
+  return new Promise((resolve, reject) => {
+    renderToReadableStream(app, {
+      onError: (error) => reject(error),
+    }).then(async (stream) => {
+      await stream.allReady;
+      // @ts-expect-error: it works fine
+      const html = await text(stream);
+
+      if (html !== renderToString(app)) {
+        throw new Error('Bad');
+      }
+
+      resolve(html);
+    }, reject);
+  });
 }