JSFiddle - React, Tailwind, and code Playground

by electronoob

HTML

<form>
  <label>local time as UTC</label><br/>
  <input type="text" value="" id="full"/>
  <br/>
    <label>utc offset</label><br/>
  <input type="text" value="" id="offset"/>
  <br/>
  <label>timezone</label><br/>
  <input type="text" value="" id="timezone"/>
  <br/><br/>
  <input type="submit" value="send to esp"/>
</form>

JavaScript

offset.value = new Date().getTimezoneOffset();

timezone.value = Intl.DateTimeFormat().resolvedOptions().timeZone;

full.value = new Date().toUTCString();