React Js String Uppercase & Lowercase Method

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
</head>
<body>
    <div id="app"></div>
    <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
    <script type="text/babel">
        function App() {
            const myString = 'fontawesomeicons';
            const upperCaseString = myString.toUpperCase();
            return (
                <div class="container">
                    <h3>React Js String Uppercase Method</h3>
                    <p>Original String: {myString}</p>
                    <p>Uppercase String: {upperCaseString}</p>
                </div>

);
        }

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

.container {
            margin: 0 auto;
            width: 500px;
            text-align: center;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            padding: 20px;
        }

.container h2 {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 10px;
        }

.container p {
            font-size: 18px;
            margin-top: 0;
        }
    </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
</head>
<body>
    <div id="app"></div>
    <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
    <script type="text/babel">
        function App() {
            const myString = 'fontawesomeicons';
            const upperCaseString = myString.toUpperCase();
            return (
                <div class="container">
                    <h3>React Js String Uppercase Method</h3>
                    <p>Original String: {myString}</p>
                    <p>Uppercase String: {upperCaseString}</p>
                </div>
​
​
            );
        }
​
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
​
    <style>
        * {
            box-sizing: border-box;
        }
​
        .container {
            margin: 0 auto;
            width: 500px;
            text-align: center;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            padding: 20px;
        }
​
        .container h2 {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 10px;
        }
​
        .container p {
            font-size: 18px;
            margin-top: 0;
        }
    </style>
</body>
​
</html>