JSFiddle - React, Tailwind, and code Playground

by adeneo

HTML

<div class="first">test1</div>
<div class="first">test2</div>
<div class="first">test3</div>

<div class="second"></div>

CSS

.second {
    margin : 10px;
    padding: 10px;
    border: 1px solid red;
}

JavaScript

var p  = document.querySelector('.second'),
    nl = document.querySelectorAll('.first');

p.innerHTML = ''; 

[].forEach.call(nl, function(item) {
    p.appendChild(item);
});