Merge pull request #125 from reactjs/sync-c3c93e2a

Sync with reactjs.org @ c3c93e2

Author: balazsorban44

README.md

@@ -53,7 +53,7 @@ The documentation is divided into several sections with a different tone and pur
 1. `git push my-fork-name the-name-of-my-branch`
 1. Go to the [reactjs.org repo](https://github.com/reactjs/reactjs.org) and you should see recently pushed branches.
 1. Follow GitHub's instructions.
-1. If possible, include screenshots of visual changes. A Netlify build will also be automatically created once you make your PR so other people can see your change.
+1. If possible, include screenshots of visual changes. A [Netlify](https://www.netlify.com/) build will also be automatically created once you make your PR so other people can see your change.
 
 ## Translation
 

content/docs/code-splitting.md

@@ -42,7 +42,7 @@ console.log(add(16, 26)); // 42
 
 If you're using [Create React App](https://create-react-app.dev/), [Next.js](https://nextjs.org/), [Gatsby](https://www.gatsbyjs.org/), or a similar tool, you will have a Webpack setup out of the box to bundle your app.
 
-If you aren't, you'll need to setup bundling yourself. For example, see the [Installation](https://webpack.js.org/guides/installation/) and [Getting Started](https://webpack.js.org/guides/getting-started/) guides on the Webpack docs.
+If you aren't, you'll need to set up bundling yourself. For example, see the [Installation](https://webpack.js.org/guides/installation/) and [Getting Started](https://webpack.js.org/guides/getting-started/) guides on the Webpack docs.
 
 ## Code Splitting {#code-splitting}
 

content/docs/concurrent-mode-adoption.md

@@ -21,6 +21,10 @@ next: concurrent-mode-reference.html
 >
 >This documentation is aimed at early adopters and people who are curious. **If you're new to React, don't worry about these features** -- you don't need to learn them right now.
 
+>Caution:
+>
+>All references below to "blocking mode" and `createBlockingRoot` are outdated and should be ignored.
+
 </div>
 
 - [Installation](#installation)

content/docs/concurrent-mode-reference.md

@@ -28,7 +28,6 @@ This page is an API reference for the React [Concurrent Mode](/docs/concurrent-m
 
 - [Enabling Concurrent Mode](#concurrent-mode)
     - [`createRoot`](#createroot)
-    - [`createBlockingRoot`](#createblockingroot)
 - [Suspense](#suspense)
     - [`Suspense`](#suspensecomponent)
     - [`SuspenseList`](#suspenselist)
@@ -47,18 +46,6 @@ Replaces `ReactDOM.render(<App />, rootNode)` and enables Concurrent Mode.
 
 For more information on Concurrent Mode, check out the [Concurrent Mode documentation.](/docs/concurrent-mode-intro.html)
 
-### `createBlockingRoot` {#createblockingroot}
-
-```js
-ReactDOM.createBlockingRoot(rootNode).render(<App />)
-```
-
-Replaces `ReactDOM.render(<App />, rootNode)` and enables [Blocking Mode](/docs/concurrent-mode-adoption.html#migration-step-blocking-mode).
-
-Opting into Concurrent Mode introduces semantic changes to how React works. This means that you can't use Concurrent Mode in just a few components. Because of this, some apps may not be able to migrate directly to Concurrent Mode. 
-
-Blocking Mode only contains a small subset of Concurrent Mode features and is intended as an intermediary migration step for apps that are unable to migrate directly.
-
 ## Suspense API {#suspense}
 
 ### `Suspense` {#suspensecomponent}

content/docs/hooks-reference.md

@@ -76,6 +76,7 @@ If your update function returns the exact same value as the current state, the s
 > Unlike the `setState` method found in class components, `useState` does not automatically merge update objects. You can replicate this behavior by combining the function updater form with object spread syntax:
 >
 > ```js
+> const [state, setState] = useState({});
 > setState(prevState => {
 >   // Object.assign would also work
 >   return {...prevState, ...updatedValues};