JSFiddle - React, Tailwind, and code Playground

HTML

<div id="USAPubHealthYesNo" >
     <ol type="a" class="indentList">
        <p>&nbsp;</p>
        <p>&nbsp;</p>
        <li><input name="rbPubHealthYesNo" 
        type="radio" class="radiobuttonfield days5" alt="Yes - five (5) day MDR 
        report is required" title="Yes - five (5) day MDR report is 
        required" value="Yes" 
        />Yes - five (5) days MDR report is required 
      <div id="calc14" class="indentListCalc"> 
       <input id="dt5Days" type="text" class="textfieldCalc labelWidth25" />
       </div>
      <br>
       </li>
       <li>
       <input name="rbPubHealthYesNo" type="radio" 
        class="radiobuttonfield days30" alt="No - thirty (30) day MDR report 
        required" title="No - thirty (30) days MDR report required" 
        value="No"  />
        No - thirty (30) day MDR report required
       <div id="calc15" class="indentListCalc"> 
        <input id="dt30Days14" type="text" class="textfieldCalc 
         labelWidth25" />
         </div>
         <br>
         </li>
          </ol>
        </div>

JavaScript

$('input').on('click', function() {
  USPublicHealth30Days($(this));
});

function USPublicHealth30Days(el) {
	 if (el.hasClass('days5')) {
     document.getElementById('calc14').style.display = 'block';
       date5Days();
		} else  {
		document.getElementById('calc15').innerHTML = '';
//    document.getElementById('calc15').style.display = 'none';
    date30Days14();
};
};
function date30Days14(){

  var dt = new Date();
  dt.setDate( dt.getDate() + 30 );
 var mo = dt.getMonth() + 1; // JS months are 0 to 11, so need to add 1
 var dy = dt.getDate();
 var yr = dt.getYear() % 100; // just to make sure only 2 digit year
 var dueDate = (mo < 10 ? "0" : "" ) + mo + "/" + ( dy < 10 ? "0" : "" ) 
 + dy + "/" + (yr < 10 ? "0" : "" ) + yr;
 var text = "30 days from today is ";

 document.getElementById('calc15').innerHTML = text + dueDate;

 }
 function date5Days(){

 var dt = new Date();
 dt.setDate( dt.getDate() + 5 );
 var mo = dt.getMonth() + 1; // JS months are 0 to 11, so need to add 1
 var dy = dt.getDate();
 var yr = dt.getYear() % 100; // just to make sure only 2 digit year
 var dueDate = (mo < 10 ? "0" : "" ) + mo + "/" + ( dy < 10 ? "0" : "" ) 
 + dy + "/" + (yr < 10 ? "0" : "" ) + yr;
 var text = "5 days from today is ";

 document.getElementById('calc14').innerHTML = text + dueDate;

}