JSFiddle - React, Tailwind, and code Playground

HTML

<p>This should be red</p>

JavaScript

var css = 'p { color: red; }';

var style = document.createElement('style');
style.type = 'text/css';

if (style.styleSheet) { // IE
    style.styleSheet.cssText = css;
} else {
    style.appendChild(document.createTextNode(css));
}

document.getElementsByTagName('head')[0].appendChild(style);