JSFiddle - React, Tailwind, and code Playground

by rodrigonery

HTML

<div class="testing">teste</div>
<div class="testing">teste</div>
<div class="testing">teste</div>

JavaScript

var $addRule = (function (style) {
  var sheet = document.head.appendChild(style).sheet;
  return function (selector, css) {
    var propText = Object.keys(css).map(function (p) {
      return p + ":" + css[p];
    }).join(";");
    sheet.insertRule(selector + "{" + propText + "}", sheet.cssRules.length);
  };
})(document.createElement("style"));

$addRule(".testing", {
  background: "red"
});