JSFiddle - React, Tailwind, and code Playground
HTML
<div class="header">
</div>
<div class="footer">
</div>CSS
.header {
background:red;
width:500px;
height:100px;
}
.container {
background:yellow;
width:500px;
height:100px;
}
.footer {
position: fixed;
top: 200px;
background:green;
width:500px;
height:100px;
}