@burglekitt/gmt/dist/zoned/parse/parseTimeZoneFromZoned.js

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

import { Temporal } from "@js-temporal/polyfill";
import { isValidZonedDateTime } from "../validate/index.js";
/**
 * Extract the IANA timeZone identifier from an ISO 8601 zoned datetime string.
 *
 * - Extracts timeZone id from a ZonedDateTime.
 * - Returns "" for invalid input.
 *
 * @param value zoned ISO 8601 datetime string
 * @returns IANA timeZone id or "" when invalid
 *
 * @example parseTimeZoneFromZoned("2024-02-29T12:34:56.789+00:00[UTC]") // "UTC"
 * @example parseTimeZoneFromZoned("invalid") // ""
 */
export function parseTimeZoneFromZoned(value) {
    if (!isValidZonedDateTime(value)) {
        return "";
    }
    try {
        return Temporal.ZonedDateTime.from(value).timeZoneId ?? "";
    }
    catch {
        return "";
    }
}