JSFiddle - React, Tailwind, and code Playground

by bgrins

HTML

<div class="one two">hi</div>

<hr />

CSS

div.one {
    color: red;
}

JavaScript

setInterval(function() {
    var sheet = document.styleSheets[1];
    if (sheet.cssRules.length == 2) {
        sheet.deleteRule(1);
    } else {
        sheet.insertRule("div.two{ color: blue; font-size: 20px; }", 1);
    }
}, 1000);