JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://momentjs.com/downloads/moment.min.js"></script>
<script src="http://momentjs.com/downloads/moment-timezone-with-data.min.js"></script>
<script src="https://bitbucket.org/pellepim/jstimezonedetect/downloads/jstz-1.0.4.min.js"></script>

<span id = "tmz"></span>

JavaScript

var tz = jstz.determine();
console.log(tz.name());