JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <div id="first" ></div>
    <div id="second"></div>
</div>

CSS

#first,#second {
    background-color: red;
    display: inline-block;
    width:50px;
    height:50px;
    margin:0px;
    padding:0px;
    border: 0px;
}

JavaScript

$(document).ready(function(){});