JSFiddle - React, Tailwind, and code Playground

by ChaseWest

HTML

<div class="gallery"></div>

CSS

div{
    background-color: black;
    height: 100px;
    width: 100px;
    
}

JavaScript

var x=1;

switch(x) {
    case 1: {
        document.getElementsByClassName("gallery")[0].style.backgroundColor="blue";
    }
}