This example shows how to set the width of Dialog to a percentage of its parent container.
width: 80%; height: 200px
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Fluid Dialog - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
<link rel="stylesheet" type="text/css" href="../demo.css">
<script type="text/javascript" src="../../jquery.min.js"></script>
<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
</head>
<body>
<h2>Fluid Dialog</h2>
<p>This example shows how to set the width of Dialog to a percentage of its parent container.</p>
<div style="margin:20px 0;"></div>
<div class="easyui-dialog" title="Fluid Dialog" style="width:80%;height:200px;max-width:800px;padding:10px" data-options="
iconCls:'icon-save',
onResize:function(){
$(this).dialog('center');
}">
<p>width: 80%; height: 200px</p>
</div>
</body>
</html>