get browser timezone javascript

var clientTimezoneOffset = new Date().getTimezoneOffset()/60;//offset in hours
Intl.DateTimeFormat().resolvedOptions().timeZoneconsole.log(new Date().toTimeString().slice(9));
console.log(Intl.DateTimeFormat().resolvedOptions().timeZone);
console.log(new Date().getTimezoneOffset() / -60);