Extjs案例 - W3xue在线HTML/CSS/JS运行工具

<!DOCTYPE html>
<html>
<head>
   <link href="//cdn.bootcss.com/extjs/6.2.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="//cdn.bootcss.com/extjs/6.2.0/ext-all.js"></script>
   <script type="text/javascript">
      Ext.onReady(function() {
         win = new Ext.Window({
            title:'Email Window',
            layout:'form',
            width:400,
            closeAction:'close',
            target : document.getElementById('buttonId'),
            plain: true,
            items: [{
               xtype : 'textfield',
               fieldLabel: 'To'
            },{
               xtype : 'textfield',
               fieldLabel: 'CC'
            },{
               xtype : 'textfield',
               fieldLabel: 'BCC'
            },{
               xtype : 'textfield',
               fieldLabel: 'Subject'
            },{
               xtype : 'textarea',
               fieldLabel: 'Email Message'
            }],
            buttons: [{
               text: 'Save Draft',
               handler: function(){Ext.Msg.alert('Save Draft', 'Your msg is saved');}
            },{
               text: 'Send',
               handler: function(){Ext.Msg.alert('Message Sent', 'Your msg is sent');}
            },{
               text: 'Cancel',
               handler: function(){win.close(); Ext.Msg.alert('close', 'Email window is closed');}
            }],
            buttonAlign: 'center',
         });
         Ext.create('Ext.Button', {
            renderTo: Ext.getElementById('buttonId'),
            text: 'Click Me',
            listeners: {
               click: function() {
                  win.show();
               }
            }
         });
      });
   </script>
</head>
<body>
   <p> Click the button to see window </p>
   <div id = "buttonId"></div>
</body>
</html>

AخA
 
<!DOCTYPE html>
<html>
<head>
   <link href="//cdn.bootcss.com/extjs/6.2.0/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="//cdn.bootcss.com/extjs/6.2.0/ext-all.js"></script>
   <script type="text/javascript">
      Ext.onReady(function() {
         win = new Ext.Window({
            title:'Email Window',
            layout:'form',
            width:400,
            closeAction:'close',
            target : document.getElementById('buttonId'),
            plain: true,
            items: [{
               xtype : 'textfield',
               fieldLabel: 'To'
            },{
               xtype : 'textfield',
               fieldLabel: 'CC'
            },{
               xtype : 'textfield',
               fieldLabel: 'BCC'
            },{