title: Effect of aria-hidden in Font Awesome
body: <p>what's the effect of <code>aria-hidden</code> in Font Awesome?
  Is it necessary to use it? why? or why not?</p>
  
  <p>for example, I want to know the effect of <code>aria-hidden="true"</code> in the code below:</p>
  
  <pre><code>&lt;i class="fa fa-star" aria-hidden="true"&gt;&lt;/i&gt;
  </code></pre>