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`focus()` was added in https://github.com/facebook/react/pull/32465. Here we add `focusLast()` and `blur()`. I also extended `focus` to take options. `focus` will focus the first focusable element. `focusLast` will focus the last focusable element. We could consider a `focusFirst` naming or even the `focusWithin` used by test selector APIs as well. `blur` will only have an effect if the current `document.activeElement` is one of the fragment children.
react-dom
This package serves as the entry point to the DOM and server renderers for React. It is intended to be paired with the generic React package, which is shipped as react to npm.
Installation
npm install react react-dom
Usage
In the browser
import { createRoot } from 'react-dom/client';
function App() {
return <div>Hello World</div>;
}
const root = createRoot(document.getElementById('root'));
root.render(<App />);
On the server
import { renderToPipeableStream } from 'react-dom/server';
function App() {
return <div>Hello World</div>;
}
function handleRequest(res) {
// ... in your server handler ...
const stream = renderToPipeableStream(<App />, {
onShellReady() {
res.statusCode = 200;
res.setHeader('Content-type', 'text/html');
stream.pipe(res);
},
// ...
});
}
API
react-dom
See https://react.dev/reference/react-dom
react-dom/client
See https://react.dev/reference/react-dom/client