title: how to read value of data-original-title of an HTML element
body: <p>I am trying to get the value of data-original-title of a <code>&lt;pre&gt;</code> element. The HTML looks like this </p>
  
  <pre><code>&lt;pre id="pre" data-toggle="tooltip" data-placement="right" title="" data-original-title="18 Jun 2019 06:00:00 AM - 18 Jun 2019 06:30:00 AM"&gt; 
     &lt;input type="radio" name="shifts[]" id="shiftsValue" class="shiftsValue" onclick="shiftCheck();" value="266930360"&gt; 
        sometext 
     &lt;br&gt;
  &lt;/pre&gt;
  </code></pre>
  
  <p>Since there are many radio buttons, I am able to get the text of the checked radio button by using the code below</p>
  
  <pre><code>var input = $('input[type=radio][class=shiftsValue]:checked').closest('pre').text();
  </code></pre>
  
  <p>Now I need to read the info stored in data-original-title. I use bootstrap 3.3.</p>
  
  <p>How can I do that ? </p>