everyutil/date/convertDateToISOWeekString.js

A comprehensive library of lightweight, reusable utility functions for JavaScript and TypeScript, designed to streamline common programming tasks such as string manipulation, array processing, date handling, and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.convertDateToISOWeekString = void 0;
/**
 * Returns string like 2025-W26 for the ISO week.
 * @author @dailker
 * @param {Date} date
 * @returns {string}
 */
function convertDateToISOWeekString(date) {
    const d = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()));
    const dayNum = d.getUTCDay() || 7;
    d.setUTCDate(d.getUTCDate() + 4 - dayNum);
    const yearStart = new Date(Date.UTC(d.getUTCFullYear(), 0, 1));
    const week = Math.ceil((((d.getTime() - yearStart.getTime()) / 86400000) + 1) / 7);
    return `${d.getUTCFullYear()}-W${week}`;
}
exports.convertDateToISOWeekString = convertDateToISOWeekString;