| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @emails react-core |
| 8 | */ |
| 9 | |
| 10 | 'use strict'; |
| 11 | |
| 12 | describe('ReactDOM.browser', () => { |
| 13 | beforeEach(() => { |
| 14 | jest.resetModules(); |
| 15 | }); |
| 16 | |
| 17 | // @gate enableBrowserAPI |
| 18 | it('can create browser-only content before the browser renderer is initialized', async () => { |
| 19 | const React = require('react'); |
| 20 | const ReactDOM = require('react-dom'); |
| 21 | const initializeReason = jest.fn( |
| 22 | () => new Error('Only render this content in a browser'), |
| 23 | ); |
| 24 | const browserOnly = ReactDOM.browser(initializeReason); |
| 25 | const ReactDOMClient = require('react-dom/client'); |
| 26 | const {act} = require('internal-test-utils'); |
| 27 | |
| 28 | function BrowserOnly() { |
| 29 | React.use(browserOnly); |
| 30 | return <span>Browser</span>; |
| 31 | } |
| 32 | |
| 33 | const container = document.createElement('div'); |
| 34 | const root = ReactDOMClient.createRoot(container); |
| 35 | await act(() => { |
| 36 | root.render( |
| 37 | <React.Suspense fallback={<span>Fallback</span>}> |
| 38 | <BrowserOnly /> |
| 39 | </React.Suspense>, |
| 40 | ); |
| 41 | }); |
| 42 | expect(container.innerHTML).toBe('<span>Browser</span>'); |
| 43 | expect(initializeReason).not.toHaveBeenCalled(); |
| 44 | }); |
| 45 | }); |