JSFiddle - React, Tailwind, and code Playground
HTML
<p><b>Note:</b> This example does not work in Internet Explorer.</p>
<div></div>
<p>Hover over the div element above, to see the transition effect.</p>CSS
div
{
opacity:0;
width:100px;
height:100px;
background:red;
transition:width 2s;
-moz-transition:width 2s; /* Firefox 4 */
-webkit-transition:width 2s; /* Safari and Chrome */
-o-transition:width 2s; /* Opera */
}
div:hover
{
opacity:100;
width:300px;
}