React is not loaded / Build is not generated - reactjs

Question

I am trying to create a WordPress plugin with React. I am following this link. I have the following package.json file
{
"name": "test-plugin",
"version": "1.0.0",
"private": true,
"description": "Sample plugin for React",
"main": "index.js",
"devDependencies": {
"#wordpress/scripts": "^13.0.3"
},
"scripts": {
"build": "wp-scripts build",
"check-engines": "wp-scripts check-engines",
"check-licenses": "wp-scripts check-licenses",
"lint:css": "wp-scripts lint-style",
"lint:js": "wp-scripts lint-js",
"lint:pkg-json": "wp-scripts lint-pkg-json",
"start": "wp-scripts start",
"test:e2e": "wp-scripts test-e2e",
"test:unit": "wp-scripts test-unit-js"
},
"author": "thor",
"license": "ISC"
}
I am enqueueing the react script as follows
wp_enqueue_script( 'react-script', plugin_dir_url(__DIR__) . 'build/index.js', ['wp-element'], $this->version, false );
ISSUES
The build react js file is not generated. I have followed the above link and everything was installed correctly. But no index.js file is created in build folder
The script is not working if I enqueue src/index.js instead of build/index.js. The script is loaded but not working as expected. I have the div with id my_app in one of the pages in which the script is loaded.
Following is the react script file
const { render, useState } = wp.element;
const Votes = () => {
const [votes, setVotes] = useState(0);
const addVote = () => {
setVotes(votes + 1);
};
return (
<div>
<h2>{votes} Votes test</h2>
<p>
<button onClick={addVote}>Vote!</button>
</p>
</div>
);
};
render(<Votes />, document.getElementById('my_app'));

Answer 1

Had the same problem with you and I spent good couple of hours trying to fix this. Here are problem that I encountered:
One of the issues was the node_modules folder was in the wrong place, supposed to be at the same level as your theme.
The other one was I had to run npm run start instead of npm start. Whenever wp-scripts output something like this :
asset index.js 4.35 KiB [emitted] (name: index)
1 related asset asset index.asset.php 107 bytes [emitted] (name: index)
means it is working. If don't get that means something wrong with your folder location.
Try and let me know.