JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container"><!--
    --><div class="box"></div><!--
    --><div class="box"></div><!--
    --><div class="box"></div><!--
    --><div class="box"></div><!--
    --><div class="box"></div><!--
    --><div class="box"></div><!--
--></div>

CSS

#container{
    width:300px;
    border:1px solid black;
}
.box{
    display:inline-block;
    height:50px;
    width:50px;
    background-color:black;
    margin:0;
    padding:0;
}