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.container.Container', {
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            renderTo : Ext.getBody(),
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            layout : 'auto',
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            width : 600,
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            items : [{
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               title: 'First Component',
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               html : 'This is First Component'
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            },{
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               title: 'Second Component',
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               html : 'This is Second Component'
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            },{
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               title: 'Third Component',
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               html : 'This is Third Component'
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            },{
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               title: 'Fourth Component',
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               html : 'This is Fourth Component'
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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>