JSFiddle - React, Tailwind, and code Playground

by chalist

HTML

<div class="l" data-pos="0"></div>

CSS

.l{
  width: 32px;
  height: 16px;
  display: block;
  background: red;
}

JavaScript

$(function() {
  a = 0;
  for (var i = 1000000000 - 1; i >= 0; i--) {
    a += i;
  };
  console.log(a);
  var l = $('.l');

  setInterval(function(){
    if (l.data('pos') == 0) {
      l.css('margin-left', '10px');
      l.data('pos', '1');
    }else{
      l.css('margin-left', '0');
      l.data('pos', '0');
    }
  }, 100);
});