JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://extjs.cachefly.net/ext-4.0.2a/resources/css/ext-all.css" type="text/css" media="screen" title="no title" charset="utf-8">

JavaScript

var data=['Code Igniter','Cake Php','Symfony','Zend'];  

//myStore.add({some: 'data'}, {some: 'other data'});

// The data store containing the list of states
var states = Ext.create('Ext.data.Store', {
    fields: ['abbr', 'name'],
    data : [
        {"abbr":"AL", "name":"Alabama"},
        {"abbr":"AK", "name":"Alaska"},
        {"abbr":"AZ", "name":"Arizona"}
        //...
    ]
});

var combo = Ext.create('Ext.form.ComboBox', {
    id:'combiId',
    name: 'comboPaises',
    fieldLabel: 'Choose State',
    store: states,
    queryMode: 'local',
    displayField: 'name',
    valueField: 'abbr',
    renderTo: Ext.getBody()
});

states.removeAll();
states.add({"abbr":"P", "name":"Peru"},{"abbr":"Ec", "name":"Ecuador"});
combo.setValue("lalalala");
console.log(combo.getSubmitData())
console.log(combo.getSubmitValue())
   

//var combobox = Ext.getCmp('combiId');
//combobox.disable(); //si anda

//combo.disable();
//combo.enable();

//console.log(combo.getStore()); //anda

//combo.getStore().add('asdas');
//combo.getStore().loadData(['adas','papa'],true);

//data = ['Peru','Ecuador','Brazil','Argentina'];

//combo.store.reload({params: {estado_id: 'df'}});
//data.push('manolo');
//combo.getStore().load(); 

//combo.store = ['Peru','Ecuador','Brazil','Argentina'];