React Js Concat String Method

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <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://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React;

function App() {
            const [text1, setText1] = useState("FONTAWESOME");
            const [text2, setText2] = useState("ICONS");
            const [results, setResults] = useState("");

const myFunction = () => {
                setResults(text1.concat(text2));
            };

return (
                <>
                    <h2>React js string.concat(text2) Method</h2>
                    <button onClick={myFunction}>click me</button>
                    <p>String 1: {text1}</p>
                    <p>String 2: {text2}</p>
                    <p>Combined string: {results}</p>
                </>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        h2 {
            font-size: 24px;
            font-weight: bold;
        }

button {
            background-color: blue;
            color: white;
            padding: 8px 16px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

button:hover {
            background-color: darkblue;
        }

p {
            margin: 8px 0;
            font-size: 16px;
        }
    </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <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://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
</head>
<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React;
​
        function App() {
            const [text1, setText1] = useState("FONTAWESOME");
            const [text2, setText2] = useState("ICONS");
            const [results, setResults] = useState("");
​
            const myFunction = () => {
                setResults(text1.concat(text2));
            };
​
            return (
                <>
                    <h2>React js string.concat(text2) Method</h2>
                    <button onClick={myFunction}>click me</button>
                    <p>String 1: {text1}</p>
                    <p>String 2: {text2}</p>
                    <p>Combined string: {results}</p>
                </>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        h2 {
            font-size: 24px;
            font-weight: bold;
        }
​
        button {
            background-color: blue;
            color: white;
            padding: 8px 16px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
​
        button:hover {
            background-color: darkblue;
        }
​
        p {
            margin: 8px 0;
            font-size: 16px;
        }
    </style>
</body>
​
</html>