JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.4/jstz.min.js"></script>
<div id="c"></div>

JavaScript

var tz = jstz.determine();
var timezone = tz.name();
$("#c").text(timezone);