From 80e6a3f392ca2e0b1bd7d1dad2984281d0cb1a8c Mon Sep 17 00:00:00 2001
From: dan <dan.abramov@me.com>
Date: Thu, 7 Apr 2022 02:35:01 +0100
Subject: [PATCH] Update some READMEs (#24290)

* Update some READMEs

* Update README.md
---
 packages/react-dom/README.md               | 36 ++++++++++++++--------
 packages/react/README.md                   | 28 +++++++++++++++--
 packages/use-sync-external-store/README.md |  4 +--
 3 files changed, 51 insertions(+), 17 deletions(-)

diff --git a/packages/react-dom/README.md b/packages/react-dom/README.md
index f31dc407837b..44787a5093fc 100644
--- a/packages/react-dom/README.md
+++ b/packages/react-dom/README.md
@@ -13,38 +13,48 @@ npm install react react-dom
 ### In the browser
 
 ```js
-var React = require('react');
-var ReactDOM = require('react-dom');
+import { createRoot } from 'react-dom';
 
-function MyComponent() {
+function App() {
   return <div>Hello World</div>;
 }
 
-ReactDOM.render(<MyComponent />, node);
+const root = createRoot(document.getElementById('root'));
+root.render(<App />);
 ```
 
 ### On the server
 
 ```js
-var React = require('react');
-var ReactDOMServer = require('react-dom/server');
+import { renderToPipeableStream } from 'react-dom/server';
 
-function MyComponent() {
+function App() {
   return <div>Hello World</div>;
 }
 
-ReactDOMServer.renderToString(<MyComponent />);
+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`
 
-- `findDOMNode`
-- `render`
-- `unmountComponentAtNode`
+See https://reactjs.org/docs/react-dom.html
+
+### `react-dom/client`
+
+See https://reactjs.org/docs/react-dom-client.html
 
 ### `react-dom/server`
 
-- `renderToString`
-- `renderToStaticMarkup`
+See https://reactjs.org/docs/react-dom-server.html
diff --git a/packages/react/README.md b/packages/react/README.md
index 0033e23bd887..493f9c83395d 100644
--- a/packages/react/README.md
+++ b/packages/react/README.md
@@ -6,8 +6,32 @@ The `react` package contains only the functionality necessary to define React co
 
 **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](https://reactjs.org/docs/optimizing-performance.html#use-the-production-build) when deploying your application.
 
-## Example Usage
+## Usage
 
 ```js
-var React = require('react');
+import { useState } from 'react';
+import { createRoot } from 'react-dom';
+
+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(<App />);
 ```
+
+## Documentation
+
+See https://reactjs.org/
+
+## API
+
+See https://reactjs.org/docs/react-api.html
diff --git a/packages/use-sync-external-store/README.md b/packages/use-sync-external-store/README.md
index c799272a93ef..e9987a399b65 100644
--- a/packages/use-sync-external-store/README.md
+++ b/packages/use-sync-external-store/README.md
@@ -1,5 +1,5 @@
 # use-sync-external-store
 
-Backwards compatible shim for React's `useSyncExternalStore`. Works with any React that supports hooks.
+Backwards-compatible shim for [`React.useSyncExternalStore`](https://reactjs.org/docs/hooks-reference.html#usesyncexternalstore). Works with any React that supports Hooks.
 
-Until `useSyncExternalStore` is documented, refer to https://github.com/reactwg/react-18/discussions/86
+See also https://github.com/reactwg/react-18/discussions/86.