ExtJs/layout/layout-auto.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 : 'auto', // 自动：这是默认布局，根据元素数量决定元素的布局。
            width : 600,
            items : [{
               title: 'First Component',
               html : 'This is First Component'
            },{ 
               title: 'Second Component',
               html : 'This is Second Component'
            },{ 
               title: 'Third Component',
               html : 'This is Third Component' 
            },{ 
               title: 'Fourth Component',
               html : 'This is Fourth Component'
            }]
         });
      });
   </script>
</head>
<body>
</body>
</html>