ExtJs/layout/layout-fit.html

<!DOCTYPE html>
<html>
<head>
   <link href="https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/ext-all.js"></script>
   <script type="text/javascript">
      Ext.onReady(function() {
         Ext.create('Ext.container.Container', {
            renderTo : Ext.getBody(),
            layout : {
               type :'fit'	 // 适合：在此布局中，容器用单个面板填充，当没有与布局相关的特定要求时，则使用此布局。
            },
            width : 600,
            defaults: {
               bodyPadding: 15
            },
            items : [{
               title: 'Panel1',
               html : 'This is panel 1'
            },{
               title: 'Panel2',
               html : 'This is panel 2'
            },{
               title: 'Panel3',
               html : 'This is panel 3'
            },{
               title: 'Panel4',
               html : 'This is panel 4'
            }]
         });
      });
   </script>
</head>
<body>
</body>
</html>