JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr><td>Need item(s)?</td><td>
 <select id="CitedIn" name="CitedIn" size="1" tabindex="13">
   <option value="none">(Select One)</option>
   <option value="Yes">Yes</option>
   <option value="No">No</option>
 </select>
</td></tr>
</table>

<div id="uploader">
Something...
</div>

JavaScript

$(document).ready(function() {  
  $("#uploader").hide();
  $("#CitedIn").change(function() { 
    if ($("#CitedIn").val()=='Yes')
       $("#uploader").show(); 
    else $("#uploader").hide();
    });
});