temporal-extra/dist/inspectors.js

Locale-aware date utilities for Temporal: week numbers, date adjusters, polyfill support and more

import "./week-info/polyfill.js";
const getFirstWeekStart = (year, weekInfo) => {
    const yearDate = Temporal.PlainDate.from({ year: year, month: 1, day: 1 });
    const dayOfYearStart = yearDate.dayOfWeek;
    const offset = (7 + dayOfYearStart - weekInfo.firstDay) % 7;
    if (7 - offset >= weekInfo.minimalDays) {
        return yearDate.subtract({ days: offset });
    }
    return yearDate.add({ days: 7 - offset });
};
/**
 * Calculates locale-aware week number.
 */
export const localeAwareWeekNumber = (date, locale) => {
    const weekInfo = (typeof locale === "string" ? new Intl.Locale(locale) : locale).getWeekInfo();
    const thisYearFirstWeekStart = getFirstWeekStart(date.year, weekInfo);
    if (Temporal.PlainDate.compare(date, thisYearFirstWeekStart) < 0) {
        const prevYearFirstWeekStart = getFirstWeekStart(date.year - 1, weekInfo);
        return prevYearFirstWeekStart.until(thisYearFirstWeekStart, { largestUnit: "weeks" }).weeks;
    }
    const nextYearFirstWeekStart = getFirstWeekStart(date.year + 1, weekInfo);
    if (Temporal.PlainDate.compare(date, nextYearFirstWeekStart) >= 0) {
        return 1;
    }
    const diff = thisYearFirstWeekStart.until(date, { largestUnit: "weeks" }).weeks;
    return Math.floor(diff) + 1;
};