JSFiddle - React, Tailwind, and code Playground

HTML

<div id="global-stripe"></div>
<div id="page-header-wrapper">
    <div id="page-header">
        <div class="col hd-left">
            <ul>
                <li><a href="zzz"><div class="hd-icon"></div></a>

                </li>
            </ul>
        </div>
        <div class="col hd-center">FooBar</div>
        <div class="col hd-right"></div>
    </div>
</div>
<div id="fake-body"></div>

CSS

* {
    box-sizing: border-box;
}
body {
    margin: 0;
}
#global-stripe {
    background-color: #333;
    height: 20px;
}
#page-header-wrapper {
    height: 100px;
}
#page-header-wrapper .page-header-fixed {
    position: fixed;
    height: 60px;
    top: 0;
}
#page-header {
    height: 100px;
    width: 100%;
    border-bottom: 2px solid #ccc;
    background-color: #eee;
    overflow: hidden;
    display: inline-block;
    z-index: 9999;
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -ms-transition: all 1s ease;
    -o-transition: all 1s ease;
    transition: all 1s ease;
}
#page-header li {
    display: inline-block;
    padding: 10px;
    border: 1px solid #eee;
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
    border-radius: 5px;
}
#page-header li:hover {
    border: 1px solid #ccc;
    background-color: #ddd;
}
.hd-icon {
    height:50px;
    width: 50px;
    border: 1px solid #000;
    display: inline-block;
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -ms-transition: all 1s ease;
    -o-transition: all 1s ease;
    transition: all 1s ease;
}
.col:last-of-type {
    float: right;
    text-align: right;
}
.hd-center {
    font-size: 48px;
    text-align: center;
    -webkit-transition: all 1s ease;
    -moz-transition: all 1s ease;
    -ms-transition: all 1s ease;
    -o-transition: all 1s ease;
    transition: all 1s ease;
}

.col {
    width: 33.33%;
    float: left;
}
.page-header-fixed li {
    padding: 5px;
}
.page-header-fixed .hd-icon {
    width: 25px;
    height: 25px;
}
.page-header-fixed .hd-center {
    font-size: 36px;
}
#fake-body {
    height: 1000px;
}

JavaScript

$(function () {
    var stripe_height = $("#global-stripe").height();

    $(window).scroll(function () {
        var scroll_top = $(window).scrollTop();
        if (scroll_top > stripe_height) {
            // make header fixed
            $("#page-header").addClass("page-header-fixed");
        } else if (scroll_top < stripe_height) {
            // remove fixed header
            $("#page-header").removeClass("page-header-fixed");
        }
    });
});