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[pull] main from react:main #611

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Merged
pull merged 1 commit into from
Jul 21, 2026
+73 −2
Merged

[pull] main from react:main #611

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7 changes: 5 additions & 2 deletions packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3232,8 +3232,11 @@ FragmentInstance.prototype.blur = function (this: FragmentInstanceType): void {
const parentInstanceOrContainer = getInstanceFromHostFiber<
Instance | Container,
>(parentHostFiber);
// TODO: Handle parentInstanceOrContainer being a document
const activeElement = parentInstanceOrContainer.ownerDocument.activeElement;
// Instance is included in the Container type for DOM.
const ownerDocument = getOwnerDocumentFromRootContainer(
parentInstanceOrContainer,
);
const activeElement = ownerDocument.activeElement;
if (
activeElement === null ||
!parentInstanceOrContainer.contains(activeElement)
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68 changes: 68 additions & 0 deletions packages/react-dom/src/__tests__/ReactDOMFragmentRefsDocument-test.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,68 @@
/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails reactcore
* @jest-environment node
*/

'use strict';

let JSDOM;
let React;
let ReactDOMClient;
let act;
let document;
let Fragment;

describe('FragmentRefs', () => {
beforeEach(() => {
jest.resetModules();
JSDOM = require('jsdom');
React = require('react');
Fragment = React.Fragment;
ReactDOMClient = require('react-dom/client');
act = require('internal-test-utils').act;

const jsdom = new JSDOM.JSDOM('');
document = jsdom.window.document;
global.window = jsdom.window;
global.document = global.window.document;
});

describe('focus methods', () => {
describe('blur()', () => {
// @gate enableFragmentRefs
it('throws when the nearest host parent is a Document container', async () => {
const fragmentRef = React.createRef();
const root = ReactDOMClient.createRoot(document);

await act(() => {
root.render(
<Fragment ref={fragmentRef}>
<html>
<body>
<a id="child-a" href="/">
A
</a>
</body>
</html>
</Fragment>,
);
});

await act(() => {
fragmentRef.current.focus();
});
expect(document.activeElement.id).toEqual('child-a');

await act(() => {
fragmentRef.current.blur();
});
expect(document.activeElement).toEqual(document.body);
});
});
});
});
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