JSFiddle - React, Tailwind, and code Playground

by David Thomas

HTML

<label>
    <input type="radio" id="postageyes" name="postage" value="Yes" />Yes</label>
<label>
    <input type="radio" id="postageno" name="postage" value="No" />No</label>

JavaScript

var appended = $('<div />', {
    'id': 'appended',
        'text': 'Appended content'
});
$('input:radio[name="postage"]').change(function () {
    if ($(this).val() == 'Yes') {
        $(appended).appendTo('body');
    } else {
        $(appended).remove();
    }
});