案例：Extjs案例     状态：可编辑再运行    进入竖版
 运行结果　
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<!DOCTYPE html>
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<html>
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<head>
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   <link href="//cdn.bootcss.com/extjs/6.2.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
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   <script type="text/javascript" src="//cdn.bootcss.com/extjs/6.2.0/ext-all.js"></script>
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   <script type="text/javascript">
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      Ext.onReady(function() {
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         Ext.create('Ext.panel.Panel', {
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            renderTo : Ext.getBody(),
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            layout : 'column' ,
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              xtype: 'layout-column',
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            requires: ['Ext.layout.container.Column'],
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            width : 600,
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            items: [{
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               title : 'First Component width 30%',
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               html : 'This is First Component',
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               columnWidth : 0.30
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            },{
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               title : 'Second Component width 40%',
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               html : '<p> This is Second Component </p> <p> Next line for second component </p>',
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               columnWidth : 0.40
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            },{
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               title : 'Third Component width 30%',
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               html : 'This is Third Component' ,
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               columnWidth : 0.30
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            }]
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         });
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      });
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   </script>
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</head>
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<body>
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</body>
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</html>