JSFiddle - React, Tailwind, and code Playground

HTML

<div class="myClass">First</div>
<div class="myClass">Second</div>
<div class="myClass">Third</div>
<div class="myClass">Fourth</div>
<div class="myClass">Fifth</div>

CSS

#wrapper {
    border: 2px solid green;
	color: brown;
}

JavaScript

var wrapper = document.createElement('div'),
    myClass = document.querySelectorAll('.myClass');

myClass[0].parentElement.appendChild(wrapper);
wrapper.id = 'wrapper';

for (var i = 0; i < myClass.length; ++i) {
    wrapper.appendChild(myClass[i]);
}