JSFiddle - React, Tailwind, and code Playground

HTML

<h3>Please select an audience</h3>
<form>
  <p><input class="age" type="radio" name="ageLimit" value="allAge"/> All ages </p>
  <p><input class="age" type="radio" name="ageLimit" value="mature"/> Mature</p>
</form>
<button id="testMe">Test Me</button>

JavaScript

$('#testMe').click(function(e){
    e.preventDefault();
    var url = 'upload.php?aud=' + $('input[name=ageLimit]:checked').val();
    alert(url);
});