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

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

import { Temporal } from "@js-temporal/polyfill";
import { plainDate } from "../../regex/index.js";
import { isLeapSecond } from "./isLeapSecond.js";
/**
 * Return true if `value` is a valid ISO PlainDate string.
 *
 * - Uses regex to check format before parsing.
 * - Rejects leap seconds (e.g., "2024-12-31T23:59:60").
 * - Rejects invalid dates (e.g., "2024-02-30").
 *
 * @param value ISO PlainDate string
 * @returns boolean indicating validity
 *
 * @example isValidDate("2024-03-10") // true
 * @example isValidDate("2024-02-30") // false
 * @example isValidDate("invalid") // false
 * @example isValidDate("2024-12-31T23:59:60") // false (leap second - not a valid date)
 */
export function isValidDate(value) {
    if (isLeapSecond(value)) {
        return false;
    }
    if (!plainDate.test(value)) {
        return false;
    }
    try {
        Temporal.PlainDate.from(value);
        return true;
    }
    catch {
        return false;
    }
}