JSFiddle - React, Tailwind, and code Playground

by skeller88

HTML

<title>z-index quirk</title>
<div id="section-with-video">
    <div id="section">
        <div id="cell"></div>
    </div>
    
    <div id="video">
    </div>
</div>

CSS

#section-with-video {
    position: relative;
}

#section {
    display: table;
    position: relative;
}

#video {
    background-color: red;
    z-index: 1;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

#cell {
    width: 50px;
    height: 50px;
    display: table-cell;
    vertical-align: middle;
    position: relative;
    background-color: blue;
    z-index: 2;
}