title: How to get data-value in data list
body: <p>How to get data-value in datalist?
  example: </p>
  
  <pre><code>&lt;datalist id="browsers"&gt;
     &lt;option value="Internet Explorer" data-value="1"&gt;
     &lt;option value="Firefox" data-value="2"&gt;
     &lt;option value="Chrome" data-value="3"&gt;
     &lt;option value="Opera" data-value="4"&gt;`enter code here`
     &lt;option value="Safari" data-value="5"&gt;
  &lt;/datalist&gt;
  </code></pre>