jQuery 1.8, async: false with jqXHR ($.Deferred) is deprecated
<p>I have been having a few issues with ajax error function getting called while the script is taking a while to load. But I was able to fix it by adding <code>async: false</code>.</p>

<p>E.g:</p>

<pre><code>$.ajax({
    type: 'POST',
    url: REQUEST_URL,
    async: false,
    data: {
        'id': id
    },
    dataType: 'json',
    success: function(output) { 
        // success
    },
    error: function() {
        alert('Error, please refresh the page');
    }
});
</code></pre>

<p>When reading the docs it says:</p>

<blockquote>
  <p>By default, all requests are sent asynchronously (i.e. this is set to
  true by default). If you need synchronous requests, set this option to
  false. Cross-domain requests and dataType: "jsonp" requests do not
  support synchronous operation. Note that synchronous requests may
  temporarily lock the browser, disabling any actions while the request
  is active. As of jQuery 1.8, the use of async: false with jqXHR
  ($.Deferred) is deprecated; you must use the complete/success/error
  callbacks.</p>
</blockquote>

<p><strong>Q)</strong> What does the last part mean about jqXHR ($.Deferred)? Does this effect my script?</p>
