JSFiddle - React, Tailwind, and code Playground

HTML

<div id = "container"></div>

CSS

#container {
    /* Dimensions */
    width: 50%;
    height: 50%;
    
    /* Positioning */
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
    
    /* Styling */
    background-color: #0c0c0c;
}