@burglekitt/gmt/dist/zoned/validate/isValidTimeZone.js

Temporal-based date and time utilities with timezone support and polyfill integration

import { Temporal } from "@js-temporal/polyfill";
import { timeZoneLike } from "../../regex/index.js";
/**
 * Validate whether a string is a valid IANA timeZone identifier.
 *
 * - Uses Temporal.ZonedDateTime.from to test timezone validity.
 * - Uses regex to check format.
 * - Returns false for invalid timezone formats.
 *
 * @param timeZone timeZone identifier to validate
 * @returns boolean indicating validity
 *
 * @example isValidTimeZone("America/New_York") // true
 * @example isValidTimeZone("Europe/London") // true
 * @example isValidTimeZone("Invalid/Timezone") // false
 */
export function isValidTimeZone(timeZone) {
    try {
        Temporal.ZonedDateTime.from({
            year: 2020,
            month: 2,
            day: 28,
            hour: 0,
            minute: 0,
            second: 0,
            timeZone,
        });
        return timeZoneLike.test(timeZone) && true;
    }
    catch {
        return false;
    }
}