JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>

<div id="target1" style="position: absolute; left: 10px; top: 80px;">jQuery.css</div>
<div id="target2" style="position: absolute; left: 160px; top: 80px;">300px</div>
<div id="target3" style="position: absolute; left: 310px; top: 80px;">0.000000000005px</div>
<div id="target4" style="position: absolute; left: 460px; top: 80px;">5.00...05e-12px</div>

CSS

div
{
    position: absolute;
    border: 1px solid black;
    width: 150px;
    height: 100px;
}

JavaScript

var tinyTop = 5;
tinyTop /= 1000000;
tinyTop /= 1000000;
$("#target1").css({top: tinyTop});

document.getElementById("target2").style.top="300px";
document.getElementById("target3").style.top="0.000000000005px";
document.getElementById("target4").style.top=tinyTop+"px";