version note

Author: mluukkai

src/content/1/en/part1d.md

@@ -7,50 +7,6 @@ lang: en
 
 <div class="content">
 
-### A note on React version
-
-Version 18 of React was released late March 2022. The code in this course should work with the new React version. However, some libraries might not yet be compatible with React 18. At the moment of writing (4th April) at least the Apollo client used in [part 8](/en/part8) does not yet work with most recent React.
-
-In case you end up in a situation where your application breaks because of library compatibility problems, <i>downgrade</i> to the older React by changing the file <i>package.json</i> as follows:
-
-```js
-{
-  "dependencies": {
-    "react": "^17.0.2", // highlight-line
-    "react-dom": "^17.0.2", // highlight-line
-    "react-scripts": "5.0.0",
-    "web-vitals": "^2.1.4"
-  },
-  // ...
-}
-```
-
-After the change is made, reinstall dependencies by running
-
-```js
-npm install
-```
-
-Note that also the file <i>index.js</i> needs to be changed a bit. For React 17 it looks like
-
-```js
-import ReactDOM from 'react-dom'
-import App from './App'
-
-ReactDOM.render(<App />, document.getElementById('root'))
-```
-
-but for React 18 the correct form is
-
-```js
-import React from 'react'
-import ReactDOM from 'react-dom/client'
-
-import App from './App'
-
-ReactDOM.createRoot(document.getElementById('root')).render(<App />)
-```
-
 ### Complex state
 
 In our previous example the application state was simple as it was comprised of a single integer. What if our application requires a more complex state?