From 2ad31bc86978cf55f99e1ecd3701b78d074822ba Mon Sep 17 00:00:00 2001
From: Jiachi Liu <inbox@huozhi.im>
Date: Tue, 28 Feb 2023 22:42:18 +0100
Subject: [PATCH 1/2] Add preconnect and prefetchDNS to rendering-stub

---
 packages/react-dom/server-rendering-stub.js                | 2 ++
 .../react-dom/src/server/ReactDOMServerRenderingStub.js    | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/react-dom/server-rendering-stub.js b/packages/react-dom/server-rendering-stub.js
index e50cb3edb3be1..6d28ee413b3cf 100644
--- a/packages/react-dom/server-rendering-stub.js
+++ b/packages/react-dom/server-rendering-stub.js
@@ -18,6 +18,8 @@ export {default as __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED} from './s
 export {
   createPortal,
   flushSync,
+  prefetchDNS,
+  preconnect,
   preload,
   preinit,
 } from './src/server/ReactDOMServerRenderingStub';
diff --git a/packages/react-dom/src/server/ReactDOMServerRenderingStub.js b/packages/react-dom/src/server/ReactDOMServerRenderingStub.js
index d7509f15495ac..29b3938c28a74 100644
--- a/packages/react-dom/src/server/ReactDOMServerRenderingStub.js
+++ b/packages/react-dom/src/server/ReactDOMServerRenderingStub.js
@@ -7,7 +7,12 @@
  * @flow
  */
 
-export {preinit, preload} from 'react-dom-bindings/src/shared/ReactDOMFloat';
+export {
+  preinit,
+  preload,
+  preconnect,
+  prefetchDNS,
+} from 'react-dom-bindings/src/shared/ReactDOMFloat';
 
 export function createPortal() {
   throw new Error(

From 2a26dfb745ace6cfdc64ea763d6794d65a47fafd Mon Sep 17 00:00:00 2001
From: Jiachi Liu <inbox@huozhi.im>
Date: Tue, 28 Feb 2023 22:53:14 +0100
Subject: [PATCH 2/2] add test

---
 .../react-dom-server-rendering-stub-test.js          | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/react-dom/src/__tests__/react-dom-server-rendering-stub-test.js b/packages/react-dom/src/__tests__/react-dom-server-rendering-stub-test.js
index 1a9aa2de636f6..d51c166bf765d 100644
--- a/packages/react-dom/src/__tests__/react-dom-server-rendering-stub-test.js
+++ b/packages/react-dom/src/__tests__/react-dom-server-rendering-stub-test.js
@@ -53,6 +53,18 @@ describe('react-dom-server-rendering-stub', () => {
     );
   });
 
+  it('provides preconnect and prefetchDNS exports', async () => {
+    function App() {
+      ReactDOM.preconnect('foo', {crossOrigin: 'use-credentials'});
+      ReactDOM.prefetchDNS('bar');
+      return <div>foo</div>;
+    }
+    const html = ReactDOMFizzServer.renderToString(<App />);
+    expect(html).toEqual(
+      '<link rel="preconnect" href="foo" crossorigin="use-credentials"/><link href="bar" rel="dns-prefetch"/><div>foo</div>',
+    );
+  });
+
   it('provides a stub for createPortal', async () => {
     expect(() => {
       ReactDOM.createPortal();