React Js Get Current Domain name

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel" data-presets="env,react">
        function App() {
            const hostname = window.location.hostname;

return (
                <div className='container'>
                    <h2>React.js window.location.hostname Property</h2>
                    <p>React Js Get current domain name from URL</p>
                    <p>{hostname}</p>
                </div>
            );
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>

h2 {
            color: blue;
        }

p {
            color: black;
            font-size: 16px;
            margin: 10px 0;
        }
    </style>
</body>

</html>