JSFiddle - React, Tailwind, and code Playground

by Gabriele Petrioli

HTML

<div id="container" class="box">
    <div class="box top left"></div>
    <div class="box top center"></div>
    <div class="box top right"></div>
    
    <div class="box middle left"></div>
    <div class="box middle center"></div>
    <div class="box middle right"></div>
    
    <div class="box bottom left"></div>
    <div class="box bottom center"></div>
    <div class="box bottom right"></div>
</div>

CSS

#container{
    width:200px;
    height:200px;
    position:relative;
    border:1px solid black;
}
.box{
    border:1px solid red;
    position:absolute;
    width:20px;
    height:20px;    
}
.top{top:0}
.middle{top:50%;margin-top:-10px;/*half of the .box height*/}
.bottom{bottom:0}

.left{left:0;}
.center{left:50%;margin-left:-10px;/*half of the .box width*/}
.right{right:0;}