JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" id="radio1" value="radio1" name="radiogroup" class="radio1" checked="checked">radio1
<input type="radio" id="radio2" value="radio2" name="radiogroup" class="radio2">radio2
<textarea id="textarea" class="txtarea"></textarea>

JavaScript

$(function() {
  $('input[name=radiogroup]').change(function() {
    if ($(this).attr("id") == "radio2") {
      if (confirm("Are you sure?")) $("textarea").val("");
      else $("#radio1").prop('checked', true);
    }
  });
});