JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    
</div>
<div class="result"></div>

CSS

.container { overflow: hidden; display: none; margin: 0; padding: 0; }
.something { float: left; }

JavaScript

function fake_ajax_call() {
    var html = '';
    html += '<div class="something">dfgsdf</div>';
    
    return html;
}

(function($) {
    $('.container').html(fake_ajax_call());
    $('.result').html($('.container').outerHeight());
})(jQuery);