JSFiddle - React, Tailwind, and code Playground

HTML

<div class="relative">
    relative
    <div class="absolute">
        absolute
    </div>
</div>

CSS

.relative {
    position: relative;
    left: 50px;
    top: 50px;
    border: 1px solid blue;
    width: 100px;
    height: 100px;
}
.absolute {
    position: absolute;
    border: 1px solid red;
    left: 0;
    top: 0;
}

JavaScript

$(function() {
    $('.absolute').prependTo('body');
});