定义和用法
通过定义 draggable 区域的边界来约束每个 draggable 的运动,使用 containment 选项来指定一个父级的 DOM 元素或者一个 jQuery 选择器
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; cursor: move } h3{ clear:left; } #containment-wrapper{ width:95%; height: 450px; border:2px solid #ccc; padding:10px; } </style></head><body> <h3>在DOM 元素中约束运动：</h3> <div id="containment-wrapper"> <div id="draggable1" class="draggable ui-widget-content"> <p>我被约束在盒子里</p> </div> <div class="draggable ui-widget-content"> <p id="draggable2" class="ui-widget-header">我被约束在父元素内</p> </div> </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({ containment:"#containment-wrapper", scroll:false }); $("#draggable2").draggable({containment:"parent"}); </script></body></html>
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