React Js Radio Button Default Checked

<!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 [options] = useState([
                "Laptop",
                "Mobile",
                "Tablet",
                "Mouse",
                "Desktop",
                "Monitor",
                "CPU",
            ]);
            const [selectedValue, setSelectedValue] = useState("Tablet");

label {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            font-size: 16px;
        }

input[type="radio"] {
            margin-right: 10px;
        }

input[type="radio"]:checked+span {
            font-weight: bold;
        }

pre {
            font-size: 16px;
            margin-top: 10px;
        }
    </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 [options] = useState([
                "Laptop",
                "Mobile",
                "Tablet",
                "Mouse",
                "Desktop",
                "Monitor",
                "CPU",
            ]);
            const [selectedValue, setSelectedValue] = useState("Tablet");
​
            const handleOptionChange = (event) => {
                setSelectedValue(event.target.value);
            };
            return (
                <div>
                    <h3>React js Radio button Default checked/selected</h3>
                    <div className="radio-group">
                        {options.map((option, index) => (
                            <label htmlFor={index} key={index}>
                                <input
                                    type="radio"
                                    id={index}
                                    value={option}
                                    checked={selectedValue === option}
                                    onChange={handleOptionChange}
                                />
                                {option}
                            </label>
                        ))}
                    </div>
                    <pre>Selected Value: {selectedValue}</pre>
                </div>
            );
        }
        ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
        .radio-group {
            display: flex;
            flex-direction: column;
        }
​
        label {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            font-size: 16px;
        }
​
        input[type="radio"] {
            margin-right: 10px;
        }
​
        input[type="radio"]:checked+span {
            font-weight: bold;
        }
​
        pre {
            font-size: 16px;
            margin-top: 10px;
        }
    </style>
</body>
​
</html>