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

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

import { Temporal } from "@js-temporal/polyfill";
import { isValidDateTime } from "../validate/index.js";
/**
 * Return the day of month (1-31) for a given ISO 8601 datetime string.
 *
 * - Returns zero-padded string for day.
 * - Returns "" for invalid input.
 *
 * @param value ISO datetime string
 * @returns Day (01-31) or "" on invalid input
 *
 * @example parseDayFromDateTime("2024-03-15T12:30:00") // "15"
 * @example parseDayFromDateTime("2024-12-31T23:59:59") // "31"
 * @example parseDayFromDateTime("invalid") // ""
 */
export function parseDayFromDateTime(value) {
    if (!isValidDateTime(value))
        return "";
    try {
        const dateTime = Temporal.PlainDateTime.from(value);
        return dateTime.day.toString().padStart(2, "0");
    }
    catch {
        return "";
    }
}