JSFiddle - React, Tailwind, and code Playground

by Idered

HTML

<script src="http://platform.twitter.com/widgets.js"></script>
<script src="http://fonts.googleapis.com/css?family=Open+Sans"></script>
<div class="twitter-follow">
    <a href="//twitter.com/Idered" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @Idered</a>
    <a href="//twitter.com/Idered" class="twitter-follow__button">Follow @Idered</a>
</div>

<p>Click, and <a href="http://twitter.com/Idered">check</a> my twitter profile, it works :)</p>

CSS

body {
    font-family: "Open Sans", sans-serif;
}

.twitter-follow {
    position: relative;
    display: inline-block;
}

.twitter-follow iframe {
    opacity: 0;
}

.twitter-follow__button {
    color: #666;
    text-decoration: none;
    width: 100%;
    top: 0;
    left: 0;
    position: absolute;
    display: block;
    text-align: center;
    line-height: 28px;
    background: #fff;
    border: 1px solid #00a0d1;
    border-radius: 5px;
    font-family:"Open Sans";
    font-size: .75em;
    z-index: -1;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.twitter-follow__button.active, .twitter-follow iframe:hover + .twitter-follow__button {
    display: inline-block;
    background: #00a0d1;
    color: #fff;
}

JavaScript

/* Created by Idered | http://idered.pl 
 * Comments here: https://news.ycombinator.com/item?id=5391457 */

var twitterButton = document.querySelector('.twitter-follow__button'),
    detectFollow = setInterval(function () {
        if (/twitter-follow-button/.test(document.activeElement.className)) {
            twitterButton.innerText = 'Thanks!';
            twitterButton.className = twitterButton.className + " active";
            clearInterval(detectFollow);
        }
    }, 250);