JSFiddle - React, Tailwind, and code Playground

HTML

<!-- JavaScript element.classList Object item() method Example -->
<!-- blog.kevinchisholm.com -->

<!-- PLEASE OPEN YOUR JAVASCRIPT CONSOLE! -->

<div id="foo" class="bar baz bif boom bust bear"></div>

JavaScript

var
i = 0,
foo = document.getElementById('foo'),
list = foo.classList,
msg = 'foo\'s classes are: ';

for (;i < list.length; i++){
    msg += ' ' + list.item(i); 
};

foo.innerHTML = msg;