通过设置 helper
选项为一个 CSS class,当缩放时只显示元素的轮廓。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI 缩放(Resizable) - 助手</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
<style>
#resizable { width: 150px; height: 150px; padding: 0.5em; }
#resizable h3 { text-align: center; margin: 0; }
.ui-resizable-helper { border: 2px dotted #00F; }
</style>
<script>
$(function() {
$( "#resizable" ).resizable({
helper: "ui-resizable-helper"
});
});
</script>
</head>
<body>
<div id="resizable" class="ui-widget-content">
<h3 class="ui-widget-header">助手</h3>
</div>
</body>
</html>