JSFiddle - React, Tailwind, and code Playground
HTML
<div class="a">fsdfdasfdsfsedfds</div>
CSS
div {
color: lightGreen;
}
JavaScript
console.log($('div.a').css('color'));
if ($('div.a').css("color") == "rgb(60,60,60)") {
$('div.a').css("color", "#666");
}