JSFiddle - React, Tailwind, and code Playground

HTML

<div class='commonClass'>

  Hello

</div>

CSS

.commonClass {
  width: 100px;
  height: 20px;
  display: inline-block;
  background:red;
}

JavaScript

var elem = document.getElementsByClassName('commonClass')[0].outerHTML
for(var i =0;i<3;i++){
$('body').append(elem)

}