JSFiddle - React, Tailwind, and code Playground

by Dominik Wilk

HTML

<!DOCTYPE html>
<html lang="en" id="html">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>
<div class="rodzic">
  <p>test</p>
</div>
</body>
</html>

SCSS

html {
  font-size: 20px;
}

.rodzic {
  font-size: 30px;
}

p {
  font-size: 2em;
}

JavaScript

document.getElementById("zmien").addEventListener("click", zmien);

var fontSize = 16;

function zmien() {
  fontSize += 2; 
  document.querySelector('#html').style.fontSize = fontSize + "px"
}