JSFiddle - React, Tailwind, and code Playground

HTML

<p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. <a href="#" title="Hello, i am a link">Vestibulum</a> tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. <a href="#" title="This is another link">Mauris placerat</a> eleifend leo.</p>

<br/>

<table>
<tr>
  <td title="cell 1 tooltip">table cell 1 </td>
  <td title="cell 2 tooltip">table cell 2 </td>
</tr>
</table>

CSS

a {
  color: #900;
  text-decoration: none;
}

a:hover {
  color: red;
  position: relative;
}

td[title]:hover:after,
a[title]:hover:after{
  content: attr(title);
  padding: 4px 8px;
  color: #333;
  position: absolute;
  white-space: nowrap;
  z-index: 20px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
  -moz-box-shadow: 0px 0px 4px #222;
  -webkit-box-shadow: 0px 0px 4px #222;
  box-shadow: 0px 0px 4px #222;
  background-image: -moz-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #eeeeee),color-stop(1, #cccccc));
  background-image: -webkit-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -moz-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -ms-linear-gradient(top, #eeeeee, #cccccc);
  background-image: -o-linear-gradient(top, #eeeeee, #cccccc);
}