JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <em></em>
    <input type="radio" name="OpeningScript" class="inline-radio" /> NO</div>
<div><input type="radio" name="OpeningScript" class="inline-radio" /> YES</div>

<input type="button" id="check" value="check" />

JavaScript

$(function () {
        $('#check').on('click', function () {
            if (! $('[name="OpeningScript"]:checked').length) {
                $('em').html('Please choose an option');
            }
            else {
                $('em').html('');
            }
            $('[name="OpeningScript"]').click(function() {
                $('em').html('');
            });
        });
    });