@burglekitt/gmt/dist/plain/validate/isValidTime.js

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

import { Temporal } from "@js-temporal/polyfill";
import { plainTime } from "../../regex/index.js";
import { isLeapSecond } from "./isLeapSecond.js";
/**
 * Return true when `value` is a valid ISO PlainTime string.
 *
 * - Uses regex to check format before parsing.
 * - Rejects leap seconds (e.g., "23:59:60").
 * - Rejects invalid times (e.g., "24:00:00", "23:60:00").
 *
 * @param value ISO PlainTime string
 * @returns boolean indicating validity
 *
 * @example isValidTime("12:34:56") // true
 * @example isValidTime("24:00:00") // false (invalid hour)
 * @example isValidTime("23:60:00") // false (invalid minute)
 * @example isValidTime("23:59:60") // false (leap second)
 */
export function isValidTime(value) {
    if (isLeapSecond(value)) {
        return false;
    }
    if (!plainTime.test(value)) {
        return false;
    }
    try {
        Temporal.PlainTime.from(value);
        return true;
    }
    catch {
        return false;
    }
}