JSFiddle - React, Tailwind, and code Playground

by serio

HTML

<div class="report">Font size is <span class="size">128</span>px
    <br />
    <br />
</div>
<div class="controls"> <a href="#" class="up">+</a>
 <a href="#" class="down">-</a>

</div>
<div class="loader"></div>

CSS

.loader {
    display: inline-block;
    width: 20px;
    text-align: center;
    font-size: 128px;
}
.controls a {
    padding: 5px 10px;
    color: blue;
    border: 1px solid blue;
    text-decoration: none;
}

/*
emoji fails to display:
on retina display @ 129px
on non-retina display @ 256px
Tested: OSX 10.9.5 Chrome Canary: Version 41.0.2272.2
*/

JavaScript

$(function () {
    var seq = [
        '🌑',
        '🌒',
        '🌓',
        '🌔',
        '🌕',
        '🌝',
        '🌖',
        '🌗',
        '🌘',
        '🌚', ];
    var i = 0;

    var $loader = $('.loader');
    var $size = $('.size');

    $('.controls a').click(function (e) {
        var $this = $(this);
        $loader.css('font-size', function (i, size) {
            size = parseInt(size);
            $size.text(size);
            return $this.hasClass('up') ? ++size : --size;
        });
    });

    (function moon() {
        setTimeout(function () {
            el = document.getElementsByClassName('loader')[0];
            el.textContent = seq[i];
            i = (i === seq.length - 1) ? 0 : ++i;
            moon();
        }, 40);
    })();
});