JSFiddle - React, Tailwind, and code Playground

HTML

<div class="test">test</test>

CSS

.test {
    color:green;
}

JavaScript

function ChangeRule() {

    var sheet = document.styleSheets[1];
    var rules = sheet.cssRules || sheet.rules;

    rules[0].style.color = 'red';
}


$(ChangeRule);