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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            height: 300,
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            width: 600,
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            layout:'border',
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            defaults: {
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               collapsible: true,
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               split: true,
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               bodyStyle: 'padding:15px'
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            },
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            items: [{
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               title: 'Panel1',
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               region:'west',
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               html: 'This is Panel 1'
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            },{
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               title: 'Panel2',
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               region:'center',
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               html: 'This is Panel 2'
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            },{
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               title: 'Panel3',
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               region: 'south',
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               html: 'This is Panel 3'
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            },{
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               title: 'Panel4',
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               region: 'east',
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               html: 'This is Panel 4'
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            },{
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               title: 'Panel5',
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               region: 'north',
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               html: 'This is Panel 5'
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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>