JSFiddle - React, Tailwind, and code Playground

HTML

<div id="result1">
    
</div>

JavaScript

$('#result1').html(timezone());

function timezone() {
    var offset = new Date().getTimezoneOffset();
    var minutes = Math.abs(offset);
    var hours = Math.floor(minutes / 60);
    var prefix = offset < 0 ? "+" : "-";
    return prefix+hours;
}