JSFiddle - React, Tailwind, and code Playground

by techiedelight

HTML

<div id="container" class="dimentions"></div>

CSS

.dimentions {
  width: 500px;
  height: 300px;
}

.border {
  border: 1px solid blue;
}

JavaScript

var div = document.getElementById("container");
div.className += " border";