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Jack Pope
bb66aa3cef
Based on - https://github.com/facebook/react/pull/28497 - https://github.com/facebook/react/pull/28419 Reusing the disableLegacyMode flag, we set ReactTestRenderer to always render with concurrent root where legacy APIs are no longer available. If disableLegacyMode is false, we continue to allow the unstable_isConcurrent option determine the root type. Also checking a global `IS_REACT_NATIVE_TEST_ENVIRONMENT` so we can maintain the existing behavior for RN until we remove legacy root support there.
react
React is a JavaScript library for creating user interfaces.
The react package contains only the functionality necessary to define React components. It is typically used together with a React renderer like react-dom for the web, or react-native for the native environments.
Note: by default, React will be in development mode. The development version includes extra warnings about common mistakes, whereas the production version includes extra performance optimizations and strips all error messages. Don't forget to use the production build when deploying your application.
Usage
import { useState } from 'react';
import { createRoot } from 'react-dom/client';
function Counter() {
const [count, setCount] = useState(0);
return (
<>
<h1>{count}</h1>
<button onClick={() => setCount(count + 1)}>
Increment
</button>
</>
);
}
const root = createRoot(document.getElementById('root'));
root.render(<Counter />);