Here, we are not using any setup of local machine to create react component. We are using online libraries for creating react project.
<!DOCTYPE html>
<html lang="en">
<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
<head>
<meta charset="UTF-8">
<title>React Demo</title>
</head>
<body>
<script type="text/babel">
ReactDOM.render(
<h1>Hello React</h1>,
document.body
);
</script>
</body>
</html>