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2 changes: 2 additions & 0 deletions packages/react-dom/server-rendering-stub.js
Original file line number Diff line number Diff line change
Expand Up @@ -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';
Original file line number Diff line number Diff line change
Expand Up @@ -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();
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7 changes: 6 additions & 1 deletion packages/react-dom/src/server/ReactDOMServerRenderingStub.js
Original file line number Diff line number Diff line change
Expand Up @@ -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(
Expand Down