JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" type="text/css" href="http://extjs.cachefly.net/extjs/4.0.1/resources/css/ext-all.css" />

JavaScript

form = Ext.create('Ext.form.Panel', {
    frame: true,
   
    width: 400,
    height: 300,
    renderTo: Ext.getBody(),
  
    fieldDefaults: {
      labelAlign: 'top',
      labelSeparator: '',
      margin: '5 5 5 5'
    },
  
    layout: 'vbox',

    items:[
    
       		{
                  id:"a1",
              
                  "width": 150,
                  "name": "repass1",
                  "xtype": "textfield",
                  "fieldLabel": "CAMPO1",
              
                  "resizable": true,
                  "draggable": true
            },
      
      {xtype: 'hidden', name: 'kkkkkk', fieldLabel: 'KKKKKKKKKKK',  width:300 }
          
      
      
    ]

  
  
});

form.getForm().findField("a1").setPagePosition(70,90,false);

form.show();