React Allow Only Alphanumeric Character

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        body {
            font-family: 'Arial', sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            background-color: #f4f4f4;
        }

#input-container {
            text-align: center;
        }

input[type="text"] {
            padding: 12px;
            font-size: 18px;
            border: 2px solid #3498db;
            border-radius: 8px;
            outline: none;
            transition: border 0.3s ease-in-out;
        }

input[type="text"]:focus {
            border-color: #007BFF;
            /* Change border color on focus */
            box-shadow: 0 0 8px rgba(0, 123, 255, 0.6);
            /* Add a subtle box shadow */
        }

#error-message {
            color: #e74c3c;
            display: none;
            margin-top: 5px;
        }
    </style>
    <script>
        function allowAlphanumericOnly(event) {
            var charCode = event.which || event.keyCode;

if ((charCode < 48 || charCode > 57) &&
                (charCode < 65 || charCode > 90) &&
                (charCode < 97 || charCode > 122)) {
                event.preventDefault();
                displayErrorMessage();
            } else {
                clearErrorMessage();
            }
        }

function displayErrorMessage() {
            document.getElementById("error-message").style.display = "block";
        }

function clearErrorMessage() {
            document.getElementById("error-message").style.display = "none";
        }
    </script>
</head>

<body>

<div id="input-container">
        <h1>Allow Only Alphanumeric in Textbox using Javascript</h1>
        <input type="text" onkeypress="allowAlphanumericOnly(event)">
        <p id="error-message">Please enter only alphanumeric characters.</p>
    </div>

</body>

</html>