JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
    <a href="#" title="Modify this">Modify</a>
</div>

CSS

.box {
  width: 148px;
  height: 148px;
  border: 1px solid silver;
  float: left;
  margin-right:15px;
  position: relative;
  background-color:#eee;
}
.box a {
  width: 100%;
  padding: 5px 0;
  color: #fff;
  text-decoration: none;
  text-align: center;
  background: #000;
  display: none;
  position: absolute;
  bottom: 0px;
}

JavaScript

var boxLink = $('.box a');
$('.box').hover(function () {
  boxLink.stop().slideToggle(200);
});