jquery 效果大全

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 上下移动效果</title>
    <style>
        #box {
            width: 100px;
            height: 100px;
            background-color: red;
            position: absolute;
            top: 50px;
            left: 50px;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div id="box"></div>
    <button id="moveUp">向上移动</button>
    <button id="moveDown">向下移动</button>
    <script>
        $(document).ready(function() {
            $('#moveUp').click(function() {
                $('#box').animate({ top: '-=20px' }, 500);
            });
            $('#moveDown').click(function() {
                $('#box').animate({ top: '+=20px' }, 500);
            });
        });
    </script>
</body>
</html>