JSFiddle - React, Tailwind, and code Playground

by Max Sinev

HTML

<div class="btn"></div>
<div class="popup"></div>

CSS

.btn {
  width: 200px;
  height: 50px;
  background: cyan;
}

.btn:hover ~ .popup {
  opacity: 1;
  visibility: visible;
  transition: visibility 0ms, opacity 500ms;
}

.popup {
  width: 200px;
  height: 100px;
  background: red;
  position: absolute;
  top: 70px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 500ms, visibility 0ms 500ms;
}