jquery 内部放大

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 内部放大</title>
    <style>
        .zoom {
            transition: transform 0.3s ease;
        }
        .zoom:hover {
            transform: scale(1.5);
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div class="zoom">鼠标悬停放大</div>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 内部放大</title>
    <style>
        .zoom {
            width: 100px;
            height: 100px;
            background-color: red;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(document).ready(function() {
            $('.zoom').hover(
                function() {
                    $(this).animate({ width: '150px', height: '150px' }, 300);
                },
                function() {
                    $(this).animate({ width: '100px', height: '100px' }, 300);
                }
            );
        });
    </script>
</head>
<body>
    <div class="zoom">鼠标悬停放大</div>
</body>
</html>

$(document).ready(function() {
    $('.zoom').hover(
        function() {
            let $this = $(this);
            let start = null;
            function step(timestamp) {
                if (!start) start = timestamp;
                let progress = timestamp - start;
                $this.css({
                    width: 100 + (50 * progress / 300) + 'px',
                    height: 100 + (50 * progress / 300) + 'px'
                });
                if (progress < 300) {
                    window.requestAnimationFrame(step);
                }
            }
            window.requestAnimationFrame(step);
        },
        function() {
            $(this).animate({ width: '100px', height: '100px' }, 300);
        }
    );
});