JSFiddle - React, Tailwind, and code Playground

by bakhshi

HTML

<div class="container">
    <div class="in"></div>
</div>

CSS

.container{
    width:500px;
    height:500px;
    position:relative;
    background-color:blue;
}
.in{
    position:absolute;
    background-color:yellow;
    left:0;
    right:0;
    top:0;
    bottom:0;
        margin:auto;
    height:50px;
}