此示例使用占位符进行排序是常见用法。Sortable应用于一组DOM元素，允许用户通过Drag'n Drop样式动作在列表中四处移动项目。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>jQuery UI Sortable - Drop Placeholder</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.0/themes/base/jquery-ui.css">
<style>
#sortable {
list-style-type: none;
margin: 0;
padding: 0;
width: 60%;
}
#sortable li {
margin: 0 5px 5px 5px;
padding: 5px;
font-size: 1.2em;
height: 1.5em;
}
html>body #sortable li {
height: 1.5em; line-height: 1.2em;
}
.ui-state-highlight {
height: 1.5em;
line-height: 1.2em;
}
</style>
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
<script src="https://code.jquery.com/ui/1.12.0/jquery-ui.js"></script>
<script>
$( function() {
$( "#sortable" ).sortable({
placeholder: "ui-state-highlight"
}).disableSelection();
});
</script>
</head>
<body>
<ul id="sortable">
<li class="ui-state-default">Item 1</li>
<li class="ui-state-default">Item 2</li>
<li class="ui-state-default">Item 3</li>
<li class="ui-state-default">Item 4</li>
<li class="ui-state-default">Item 5</li>
<li class="ui-state-default">Item 6</li>
<li class="ui-state-default">Item 7</li>
</ul>
</body>
</html>