JSFiddle - React, Tailwind, and code Playground

HTML

<div id="header">
    Header
</div>
<div id="middle">
    Middle begin<br />Middle<br />Middle<br />Middle<br />Middle<br />Middle<br />Middle<br />Middle end
    <div id="push"></div>
</div>
<div id="footer">
    Footer
</div>

CSS

* {
    margin: 0;
}
html, body {
    height: 100%;
}
#header {
    float: left;
    width: 100%;
}
#middle {
    min-height: 100%;
    height: auto !important;
    height: 100%;
    margin: 0 auto -4em;
}
#footer, #push {
    height: 4em;
    clear: both;
}

/* Following styles are optional: */
#header {
    background: #ccf;
}
#middle {
    background: #cfc;
}
#footer {
    background: #fcc;
}