how to use nodejs modules in nw/react app - reactjs

Question

I'm trying to build an app with NW ans react and i'm having trouble calling node js modules fron react like the "fs" module i got the following error: TypeError: fs.readdir is not a function
this is my folders structure:
public
-----files generated by CRA
src
-----main.js
-----handlers.js
-----files generated by CRA
package.json
{
"name": "nw-react",
"version": "0.1.0",
"private": true,
"main": "./public/main.js",
"dependencies": {
"#testing-library/jest-dom": "^5.11.4",
"#testing-library/react": "^11.1.0",
"#testing-library/user-event": "^12.1.10",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-scripts": "4.0.3",
"web-vitals": "^1.0.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"nw" : "nw ."
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"cross-env": "^7.0.3",
"nw": "^0.64.1"
}
}
main.js
nw.Window.open("http://localhost:3000", {}, function (win) {});
handlers.js
const fs = require("fs");
exports.getFiles = cb => {
const dir = "C:\\Users\\pc\\Documents";
fs.readdir(dir, (err, files) => {
cb(files);
});
};
App.js
import { useState, useEffect } from "react";
import logo from "./logo.svg";
import "./App.css";
const handlers = require("./handler");
function App() {
const [files, setFiles] = useState([]);
useEffect(() => {
handlers.getFiles(files => {
setFiles(files);
});
}, []);
return (
<div className='App'>
{files.map(file => (
<h1 key={file}>{file}</h1>
))}
</div>
);
}
export default App;

Answer 1

Add this to your package.json:
"node-remote": [
"http://localhost:3000",
"file://*"
]
You may also need this:
"eslintConfig": {
"extends": "react-app",
"globals": {
"nw": true
}
}

Answer 2

You cannot use fs module in browser.. it is node core module.