Downgrade react version manually

downgrade_react_18_to_17.md

To downgrade to react 17

• Step 1: In package.json, replace react version.

"dependencies": {
...
  "@types/react": "^17.0.39",
  "@types/react-dom": "^17.0.11",
...
  "react": "^17.0.2",
  "react-dom": "^17.0.2",

• Step 2: Run

  rm -rf node_modules; npm install

• Step 3 Change src/index.tsx

import ReactDOM from 'react-dom';
...
ReactDOM.render(
    <App />,
  document.getElementById('root')
);

Thanks: facebook/create-react-app#12269 (comment)