说明
通过定义 draggable 区域的边界来约束每个 draggable 的运动。设置 axis 选项来限制 draggable 的路径为 x 轴或者 y 轴
示例
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>draggable</title>
<link rel="stylesheet" href="js/jquery-ui-1.12.1.custom/jquery-ui-1.12.1.custom/jquery-ui.min.css">
<style>
.draggable{
width: 90px;
height: 90px;
padding: 0.5em;
float: left;
margin: 0 10px 10px 0;
}
#draggable1,#draggable2{
margin-bottom: 20px;
}
#draggable1{
cursor: e-resize;
}
#draggable2{
cursor:n-resize;
}
h4{
clear:left;
}
</style>
</head>
<body>
<h4>沿着X轴约束运动：</h4>
<div id="draggable1" class="draggable ui-widget-content">
<p>只能水平拖拽</p>
</div>
<h4>沿着Y轴约束运动：</h4>
<div id="draggable2" class="draggable ui-widget-content">
<p>只能垂直拖拽</p>
</div>
<script src="js/jquery-ui-1.12.1.custom/jquery-ui-1.12.1.custom/external/jquery/jquery.js" type="text/javascript" ></script>
<script src="js/jquery-ui-1.12.1.custom/jquery-ui-1.12.1.custom/jquery-ui.min.js"></script>
<script>
$("#draggable1").draggable({axis:"x"});
$("#draggable2").draggable({axis:"y"});
</script>
</body>
</html>
输出
