@burglekitt/gmt/dist/plain/parse/parseHourFromTime.js

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

import { Temporal } from "@js-temporal/polyfill";
import { isValidTime } from "../validate/index.js";
/**
 * Return the hour (0-23) for a given ISO 8601 time string.
 *
 * - Returns zero-padded string for hour.
 * - Returns "" for invalid input.
 *
 * @param value ISO time string
 * @returns Hour (00-23) or "" on invalid input
 *
 * @example parseHourFromTime("12:30:00") // "12"
 * @example parseHourFromTime("invalid") // ""
 */
export function parseHourFromTime(value) {
    if (!isValidTime(value))
        return "";
    try {
        const time = Temporal.PlainTime.from(value);
        return time.hour.toString().padStart(2, "0");
    }
    catch {
        return "";
    }
}