JSFiddle - React, Tailwind, and code Playground

HTML

<div class="test">abc</div>

CSS

.test {
    width: 100px;
    height: 100px;
}

JavaScript

//$('.test').css({ '-webkit-box-shadow': 'inset 2px 2px 5px #DEDEDE' });

$('.test').css('background', '-webkit-gradient(linear,left top,left bottom,from(#a4a4a4),to(#FFFFFF))');

//$('.test).css({ 'background': '-webkit-gradient(linear,left top,left bottom,from(#f4f4f4),to(#FFFFFF))' });