install jsx for react code example
Example 1: install react js
npx create-react-app <appname> // eg: npx create-react-app blog
cd <appname> // cd blog
npm start //runs on localhost:3000
Example 2: link react to html
<script crossorigin src="https://unpkg.com/react@17/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>