JSFiddle - React, Tailwind, and code Playground

by bizamajig

CSS

html {
    height: 100%;
    background-image: url(http://www.artisanaljavascript.com/images/tradition.jpg);
    background-size: 100%;
    background-repeat:no-repeat;
    background-position: 50% 50%;
    transition: background-size 30s;
}
.trans {
    background-size: 120%;
}

JavaScript

setTimeout(function() {
    $('html').addClass('trans');
}, 1000);