JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://thecodeplayer.com/uploads/js/jquery.easing.min.js"></script>
<form id="msform">
    <!-- progressbar -->
    <ul id="progressbar">
        <li class="active">Account Setup</li>
        <li>Social Profiles</li>
        <li>Personal Details</li>
        <div class="clearfix"></div>
    </ul>
    <!-- fieldsets -->
    <fieldset>
         <h2>Variable Height Fieldset (1/3)</h2>

        <input type="button" name="next" class="next action-button" value="Next" />
    </fieldset>
    <fieldset>
         <h2>Variable Height Fieldset (2/3)</h2>

        <input type="button" name="previous" class="previous action-button" value="Previous" />
        <input type="button" name="next" class="next action-button" value="Next" />
    </fieldset>
    <fieldset>
         <h2>Variable Height Fieldset (3/3)</h2>

        <input type="button" name="previous" class="previous action-button" value="Previous" />
        <input type="submit" name="submit" class="submit action-button" value="Submit" />
    </fieldset>
</form>
<footer class="tm-footer">Footer Content Here (Needs to be under the fieldsets)</footer>

CSS

#msform {
    margin: 30px auto;
    text-align: center;
    position:relative;
    height:250px;
}
#msform fieldset {
    background: white;
    border: 0 none;
    border-radius: 3px;
    box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
    box-sizing: border-box;
    width: 80%;
    margin: 20px 10%;
    position:absolute;
}
/*Hide all except first fieldset*/
 #msform fieldset:not(:first-of-type) {
    display: none;
}
#msform .action-button {
    width: 100px;
    background: #27AE60;
    font-weight: bold;
    color: white;
    border: 0 none;
    border-radius: 1px;
    cursor: pointer;
    padding: 10px 5px;
    margin: 10px 5px;
}
#msform .action-button:hover, #msform .action-button:focus {
    box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
}
/*progressbar*/
 #progressbar {
    margin-bottom: 30px;
    padding:0;
    height:50px;
    /*CSS counters to number the steps*/
    counter-reset: step;
    position:relative;
}
#progressbar li {
    list-style-type: none;
    color: #2C3E50;
    text-transform: uppercase;
    font-size: 9px;
    width: 33.33%;
    float: left;
    position: relative;
}
#progressbar li:before {
    content: counter(step);
    counter-increment: step;
    width: 20px;
    line-height: 20px;
    display: block;
    font-size: 10px;
    color: white;
    background: red;
    border-radius: 3px;
    margin: 0 auto 5px auto;
}
/*progressbar connectors*/
 #progressbar li:after {
    content:'';
    width: 100%;
    height: 2px;
    background: green;
    position: absolute;
    left: -50%;
    top: 9px;
    z-index: -1;
    /*put it behind the numbers*/
}
#progressbar li:first-child:after {
    /*connector not needed before the first step*/
    content: none;
}
/*marking active/completed steps green*/

/*The number of the step and the connector before it = green*/
 #progressbar li.active:before, #progressbar li.active:after {
    background: #27AE60;
    color: white;
}
.tm-footer {
    text-align:center;
}
}

JavaScript

//jQuery time
    var current_fs, next_fs, previous_fs; //fieldsets
    var left, opacity, scale; //fieldset properties which we will animate
    var animating; //flag to prevent quick multi-click glitches

    $(".next").click(function () {
        if (animating) return false;
        animating = true;

        current_fs = $(this).parent();
        next_fs = $(this).parent().next();

        //activate next step on progressbar using the index of next_fs
        $("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active");

        //show the next fieldset
        next_fs.show();
        //hide the current fieldset with style
        current_fs.animate({
            opacity: 0
        }, {
            step: function (now, mx) {
                //as the opacity of current_fs reduces to 0 - stored in "now"
                //1. scale current_fs down to 80%
                scale = 1 - (1 - now) * 0.2;
                //2. bring next_fs from the right(50%)
                left = (now * 50) + "%";
                //3. increase opacity of next_fs to 1 as it moves in
                opacity = 1 - now;
                current_fs.css({
                    'transform': 'scale(' + scale + ')'
                });
                next_fs.css({
                    'left': left,
                        'opacity': opacity
                });
            },
            duration: 800,
            complete: function () {
                current_fs.hide();
                animating = false;
            },
            //this comes from the custom easing plugin
            easing: 'easeInOutBack'
        });
    });

    $(".previous").click(function () {
        if (animating) return false;
        animating = true;

        current_fs = $(this).parent();
        previous_fs = $(this).parent().prev();

        //de-activate current step on progressbar
        $("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active");

        //show the previous...