jquery鼠标经过样式

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Mouseover Example</title>
    <style>
        .hover-effect {
            background-color: #f0f0f0;
            padding: 10px;
            margin: 10px;
            cursor: pointer;
        }
        .hover-effect:hover {
            background-color: #ddd;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div class="hover-effect">Hover over me!</div>

    <script>
        $(document).ready(function() {
            $('.hover-effect').mouseover(function() {
                $(this).css('background-color', '#ddd');
            }).mouseout(function() {
                $(this).css('background-color', '#f0f0f0');
            });
        });
    </script>
</body>
</html>

// 确保 jQuery 库已经正确引入
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

// 确保选择器正确
$('.hover-effect').mouseover(function() {
    $(this).css('background-color', '#ddd');
}).mouseout(function() {
    $(this).css('background-color', '#f0f0f0');
});