title: How to make alerts fade out in Bootstrap 3?
body: <p>I'm using Bootstrap alerts,i tried multiple ways to make them fade out but it didn't work.
  This is the code:</p>
  
  <pre><code>&lt;div class='col-sm-7 alert alert-success' id='alrt' role='alert'&gt;
  &lt;i class='fa fa-check fa-fw'&gt;&lt;/i&gt;
  &lt;b&gt;Etudiant ajouté avec succés&lt;/b&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>the alert show up automatically when opening the page. </p>