jquery悬浮按钮实现

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery悬浮按钮示例</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css">
    <style>
        .fab {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background-color: #007bff;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .fab:hover {
            background-color: #0056b3;
        }
    </style>
</head>
<body>
    <div class="fab">
        <i class="fas fa-plus"></i>
    </div>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(document).ready(function() {
            $('.fab').click(function() {
                alert('悬浮按钮被点击了！');
            });
        });
    </script>
</body>
</html>