JSFiddle - React, Tailwind, and code Playground

HTML

<button>Блок</button>
<div class="box">
  какой-то текст
</div>

CSS

.box {
  position: fixed;
  top: 0;
  right: 0px;
  height: 100vh;
  width: 50px;
  background-color:blue;
  color:#fff;
  padding:50px;
  transition:0.3s ease transform;
  transform:translateY(-100%);
}
.box.open {
  transform:translateY(0%);
}

JavaScript

$('button').click(function(){
	$('.box').toggleClass('open');
})