JSFiddle - React, Tailwind, and code Playground

HTML

<div id="minhaDiv" class="classe1 classe2 classe3"></div>

JavaScript

var classes = document.getElementById('minhaDiv').className.split(' ');
console.log(classes);

var classes = $("#minhaDiv").attr("class").split(' ');

for(var i = 0; i < classes.length; i+++)
$('body').append("classes["+i+"] => " + classes[i] + "<br>");