我不明白“ 100”的含义。每秒100像素吗？ 该代码摘自：https://jqueryui.com/draggable/#scroll
<!doctype html>
<html lang="en">
<head>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<style>
#draggable,#draggable2,#draggable3 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
</style>
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
$( function() {
$( "#draggable3" ).draggable({ scroll: true,scrollSpeed: 100 });
} );
</script>
</head>
<body>
<div id="draggable3" class="ui-widget-content">
<p>scrollSpeed set to 100</p>
</div>
<div style="height: 5000px; width: 1px;"></div>
</body>
</html>