JSFiddle - React, Tailwind, and code Playground

HTML

<a id='clickme' href='#'>Click Me</a>
<div class='mydiv'></div>

CSS

a#clickme{width:20px; height:20px; background:#444; cursor:pointer;display:block; text-indent:-9999px}
div.mydiv{width:200px; height:200px;border:2px solid #666; position:fixed; left:-200px}

JavaScript

$('#clickme').click(function() {
    var $slider = $('.mydiv');
    $slider.animate({
      left: parseInt($slider.css('left'),10) == -200 ?
       0 : -200
    });
  });