popup.html

<!DOCTYPE html>
<html>

<head>
    <title>Webpage Feedback</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            padding: 20px;
            background-color: #f9f9f9;
        }

        h1 {
            color: #333;
        }

        textarea {
            width: 100%;
            height: 100px;
            margin-bottom: 10px;
        }

        button {
            background-color: #4CAF50;
            color: white;
            padding: 10px 20px;
            border: none;
            cursor: pointer;
        }

        button:hover {
            background-color: #45a049;
        }

        .message {
            margin-top: 20px;
            font-size: 14px;
        }
    </style>
</head>

<body>
    <h1>Webpage Feedback</h1>
    <textarea id="feedback" maxlength="500" placeholder="Write your feedback here..."></textarea>
    <button id="submitFeedback">Submit</button>
    <div id="message" class="message"></div>
    <script src="popup.js"></script>
</body>

</html>