JSFiddle - React, Tailwind, and code Playground
HTML
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/jquery-ui.min.js"></script>
<label id="has-tt-label" for="has-tt" title="Some <b>great</b> input!">Some Input: </label><input type="text" id="has-tt" title></input>
JavaScript
$(document).tooltip();
$("#has-tt").tooltip({content:function(){return "Some <b>great</b> HTML tooltip text!";}});