JSFiddle - React, Tailwind, and code Playground

by jun68ykt

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<div />

CSS

div {
  width: 300px;
  height: 300px;
}

#aaa { background-color: red; }
    
#aaa_sp { background-color: blue; }

JavaScript

$(window).on('load resize', 
  function() {
    $('div').attr('id', 'aaa' + (window.innerWidth < 769 ? '_sp':''));
});