JSFiddle - React, Tailwind, and code Playground

HTML

<div id="outer">
    <div id="inner">
        top content
    </div>
    
    bottom content
</div>

CSS

body
{
    padding: 0;
    margin: 0;
}

div#outer
{
    padding-top: 300px;
}

div#inner
{
    position: absolute;
    top: 0;
    background: yellow;
    display: block;
    height: 300px;
    width: 100%;
}