title: bootstrap modal close button aria-hidden=true
body: <p>As per <a href="http://getbootstrap.com/javascript/#modals" rel="noreferrer">the bootstrap document</a>, adding <code>aria-hidden="true"</code> tells assistive technologies to skip the modal's DOM elements, which explains the presence of <code>aria-hidden=true</code> in the main <code>modal div</code>.</p>
  
  <p>What's the purpose of adding <code>aria-hidden=true</code> for the modal close button in the <code>modal-header div</code> ? </p>
  
  <pre><code>&lt;!-- Modal --&gt;
  &lt;div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"&gt;
    &lt;div class="modal-dialog"&gt;
      &lt;div class="modal-content"&gt;
        **&lt;*div class="modal-header"&gt;
          &lt;button type="button" class="close" data-dismiss="modal" aria-hidden="true"&gt;&amp;times;       &lt;/button&gt;
          &lt;h4 class="modal-title" id="myModalLabel"&gt;Modal title&lt;/h4&gt;
        &lt;/div&gt;***
        &lt;div class="modal-body"&gt;
          ...
        &lt;/div&gt;
        &lt;div class="modal-footer"&gt;
          &lt;button type="button" class="btn btn-default" data-dismiss="modal"&gt;Close&lt;/button&gt;
          &lt;button type="button" class="btn btn-primary"&gt;Save changes&lt;/button&gt;
        &lt;/div&gt;
      &lt;/div&gt;&lt;!-- /.modal-content --&gt;
    &lt;/div&gt;&lt;!-- /.modal-dialog --&gt;
  &lt;/div&gt;&lt;!-- /.modal --&gt;
  </code></pre>