JSFiddle - React, Tailwind, and code Playground

HTML

<script>
      function setFries(){
        var el = document.getElementById("burger");
        if(el.checked)
          document.getElementById("fries").disabled = false;
        else
         document.getElementById("fries").disabled = true;    
      }  
    </script>


<div><input type="radio" name="o1" id="burger" onchange="setFries();"/>Burger</div>
<div id="yesFries"><input type="checkbox" name="e1" id="fries" disabled="disabled"/>Fries with that?</div>
<div><input type="radio" name="o1" id="pizza" onchange="setFries();"/>Pizza</div>
<div><input type="radio" name="o1" id="hotdog" onchange="setFries();"/>Hot Dog</div>