JSFiddle - React, Tailwind, and code Playground

by Bharat Soni

HTML

<div class="parent">
    <div class="child"></div>
</div>

CSS

.parent{background-color:red;width:60%;height:1000px;position:relative;}
.child{position:fixed;width:100%;height:40px;background-color:green;opacity:0.7;}