title: Get aria-expanded value
body: <p>I didn't find a way to get aria-expanded value from DOM.</p>
  
  <pre><code>&lt;a class="accordion-toggle collapsed" href="#collapse-One" data-parent="#accordion-1" data-toggle="collapse" aria-expanded="false"&gt;
      &lt;i class="fa fa-search-plus"&gt;&lt;/i&gt;
      test
  &lt;/a&gt;
  </code></pre>
  
  <p>I want to test if it's <code>true</code> then I can change <code>&lt;i&gt;</code> class to <code>fa-search-minus</code>. I tried this but I always get an undefined value:</p>
  
  <pre><code>console.log($(this).find('a.aria-expanded').val());
  </code></pre>