title: How to get time zone offset from IANA time zone code in JavaScript?
body: <p>I have <a href="https://www.iana.org/time-zones" rel="noreferrer">IANA</a> time zone code like "Asia/Kolkata" and I need to get time zone offset like -330 in JavaScript. I am not able to get time zone offset any help will be appriciated.</p>