JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">STUFF</div>

JavaScript

var data =  "<div id=\"1234\" class=\"myclass\">some other stuff</div>";

$(function() {
    //do stuff
    $.get('/ajax_html_echo/', {
        "blah": 'blah'
    }, function(something) {
        $(data).addClass('anotherclass');
        $('#container').html(data + $(data).is('.anotherclass'));
    });
});