flatpickr/src/utils/dates.ts

A lightweight, powerful javascript datetime picker

import { Locale } from "types/locale";
/**
 * Compute the difference in dates, measured in ms
 */

export function compareDates(date1: Date, date2: Date, timeless?: boolean) {
  if (timeless !== false) {
    return (
      new Date(date1.getTime()).setHours(0, 0, 0, 0) -
      new Date(date2.getTime()).setHours(0, 0, 0, 0)
    );
  }

  return date1.getTime() - date2.getTime();
}

export const monthToStr = (
  monthNumber: number,
  shorthand: boolean,
  locale: Locale
) => locale.months[shorthand ? "shorthand" : "longhand"][monthNumber];

export const getWeek = (givenDate: Date) => {
  const onejan = new Date(givenDate.getFullYear(), 0, 1);
  return Math.ceil(
    ((givenDate.getTime() - onejan.getTime()) / 86400000 +
      onejan.getDay() +
      1) /
      7
  );
};

export const duration = {
  DAY: 86400000,
};