Sencha touch links not clickable

why.js

Ext.application({
  name: 'Sencha',

  launch: function() {
    Ext.create("Ext.TabPanel", {
      fullscreen: true,
      tabBarPosition: 'bottom',
      ui: 'light',

      items: [
        {
          title: 'Home',
          iconCls: 'home',
          html: [
            '<br><br>',
            '<a href="#" onclick="alert(\'clicked!\');">click me</a>',
            '<br><br>',
            '<a href="http://twitter.com" target="_blank">or me</a>',
          ].join('')
        }
      ]
    });
  }
});

Did you find solution for this?