JSFiddle - React, Tailwind, and code Playground

by maremp

HTML

<div id="a">

</div>

CSS

body {
  background: blue;
}

div {
  color: white;
}

@media screen and (min-width: 400px) {
  body {
    background: red;
  }
}

JavaScript

window.addEventListener('resize', function(e) {
document.getElementById('a').innerText = window.innerWidth + 'px';
})