JSFiddle - React, Tailwind, and code Playground
HTML
<script src='http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js'></script>
<div id='jquery_mouseover'>
<p>Watch me change!</p>
</div>
JavaScript
var oldText = $('#jquery_mouseover').text();
$('#jquery_mouseover').hover(
function () {
$(this).text('Wow, I changed!');
}, function () {
$(this).text(oldText);
});