JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
   <div id="header"></div>
   <div id="body">
     <p>Sample content.</p>
     <p>Sample content.</p><p>Delete some of this to see it works.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p><p>Sample content.</p>
   </div>
   <div id="footer"></div>
</div>

CSS

html,
body {
   margin:0;
   padding:0;
   height:100%;
}
#container {
   min-height:100%;
   position:relative;
}
#header {
   background:#ff0;
   padding:10px;
}
#body {
   padding:10px;
   padding-bottom:60px;
}
#footer {
   position:absolute;
   bottom:0;
   width:100%;
   height:60px;
   background:#6cf;
}