locutus/esm/python/calendar/monthrange.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { daysInMonth, normalizeCalendarMonth, normalizeCalendarYear, pythonWeekday } from "../_helpers/_calendar.js";
export function monthrange(year, month) {
    //      discuss at: https://locutus.io/python/calendar/monthrange/
    // parity verified: Python 3.12
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //       example 1: monthrange(2024, 2)
    //       returns 1: [3, 29]
    if (arguments.length === 0) {
        throw new TypeError("monthrange() missing 2 required positional arguments: 'year' and 'month'");
    }
    if (arguments.length === 1) {
        throw new TypeError("monthrange() missing 1 required positional argument: 'month'");
    }
    const normalizedYear = normalizeCalendarYear(year, 'monthrange');
    const normalizedMonth = normalizeCalendarMonth(month, 'monthrange');
    return [pythonWeekday(normalizedYear, normalizedMonth, 1), daysInMonth(normalizedYear, normalizedMonth)];
}