JSFiddle - React, Tailwind, and code Playground

HTML

<h1>Foo</h1>
   <div>a</div>
   <div>b</div>
   <h4>Bar</h4>
   <div>c</div>
   <div id="wrap-until"></div>

CSS

#content{
  width:auto;
  height:auto;
  border:1px solid #111; 
}

JavaScript

$(document).ready(function(){
 $('body').wrapAll("<div id='content'></div>);
});