JSFiddle - React, Tailwind, and code Playground

HTML

<div class="image"></div>

CSS

.image {
    height:200px;
    width:200px;
    background: green;
}

JavaScript

$(document).ready(function () {

    setTimeout(function () {
        changeColor('purple')
    }, 1000);

});

function changeColor(color) {
    $(".image").css('background', color);
};