JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block">Какой-то контент</div>

CSS

.block{
  transition: all .5s;
  width: 100px;
  height: 100px;
  background-color: red;
}
.block:hover{
  height: 120px;
  width: 120px;
}