<div class="link">
  <div class="p">кнопка</div>
  <div class="hidden"></div>
</div>
.p {
  
}
.link {
  position: relative;
}
.hidden {
  position: absolute;
  top: 30px;
  display: none;
  width: 200px;
  height: 300px;
  background-color: pink;
}
.hidden.active {
  display: block;
}
$('.link').hover( function(){
  $('.hidden').toggleClass('active');
})

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js