JSFiddle - React, Tailwind, and code Playground

by cncent454518

HTML

<div id="div1" class="greeting">
  hello
</div>

<div id="div2" class="greeting big-font">
  hey
</div>

JavaScript

var div1 = document.getElementById('div1')
var div2 = document.getElementById('div2')

div1.className = div1.className + " border";
div2.className = div2.className + " border";

alert(div1.className)
alert(div2.className)