JSFiddle - React, Tailwind, and code Playground

HTML

<div id="sample" style="height: 100px">
     <div class="test">
       ...
     </div>
     <div class="test">
       ...
     </div>
     <div class="test">
       ...
     </div>
     ...
 </div>

JavaScript

var str = $('#sample')[0].outerHTML.split('\n')[0];

alert(str);