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.getElementsByClassName('myClass'),
    myClassParent = myClass[0].parentNode;
    
    while (myClass.length) {
        wrapper.appendChild(myClass[0]);
    }
    myClassParent.appendChild(wrapper);
    wrapper.setAttribute('id','wrapper');