import timezoneOffset from './timezoneOffset';

/**
 * Abbreviated time zone name or similar information.
 */
function timezoneAbbr(date) {
    // Date.toString gives different results depending on the
    // browser/system so we fallback to timezone offset
    // chrome: 'Mon Apr 08 2013 09:02:04 GMT-0300 (BRT)'
    // IE: 'Mon Apr 8 09:02:04 UTC-0300 2013'
    const tz = /\(([A-Z]{3,4})\)/.exec(date.toString());
    return tz ? tz[1] : timezoneOffset(date);
}

export default timezoneAbbr;