JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" id="addweekhours" class="option-input radio" />
              <span> First</span>

					
          
 <div id="showweekhours" style="display:none;">
			<input id="ChkSUN" type="checkbox" class="single sun option-input checkbox" name="days"/>
               <span> Second</span>
										</div>

JavaScript

$('#addweekhours').click(function () {
                $('#showweekhours').slideToggle("fast");
            });