JSFiddle - React, Tailwind, and code Playground

HTML

<div id='a'>A</div>
<div id='b'>B</div>
<div id='c'>C</div>

CSS

#a {
 z-index: 1;   
    position: absolute;
    background-color: red;
}
#b {
 z-index: 2;  
    position: absolute;
    background-color: green;
}

#c {
    z-index: 10;
    background-color: blue;
}