title: How AJAX calls work with TWIG
body: <p>I am trying to understand how Twig can load a template through AJAX.
  From their website, it is clear how to load a template (http://twig.sensiolabs.org/doc/api.html)</p>
  
  <pre><code>echo $twig-&gt;render('index.html', array('the' =&gt; 'variables', 'go' =&gt; 'here'));
  </code></pre>
  
  <p>But how would this work for an AJAX call?  How would you tell Twig that you want to 'render' something that is only a part of index.html ... and not reload the entire page?  I looked at Twig's sole Ajax example (http://twig.sensiolabs.org/doc/recipes.html), but this doesn't explain how Twig knows what part of the page you want to change.  Assuming your Ajax call results in page content updates.  I just need a simple example of this, something more than what is on Twig's recipe page.</p>