JSFiddle - React, Tailwind, and code Playground

HTML

<div class="fixed">Fixed</div>
<div class="relative">Relative</div>

CSS

div {
    height: 100px; 
    width: 100px; 
}

.relative {
    background-color: #99FFFF;
}


.fixed {
    background-color: #CCFFCC; 
    position: fixed; 
    top: 100px;
}

body {
    height: 2000px;
}