Function formatDistance

pkgs/core/src/formatDistance/index.ts:100–208

(
  laterDate: DateArg<Date> & {},
  earlierDate: DateArg<Date> & {},
  options?: FormatDistanceOptions,
)

 * //=> 'pli ol 1 jaro'
 */
export function formatDistance(
  laterDate: DateArg<Date> & {},
  earlierDate: DateArg<Date> & {},
  options?: FormatDistanceOptions,
): string {
  const defaultOptions = getDefaultOptions();
  const locale = options?.locale ?? defaultOptions.locale ?? defaultLocale;
  const minutesInAlmostTwoDays = 2520;

  const comparison = compareAsc(laterDate, earlierDate);

  if (isNaN(comparison)) throw new RangeError("Invalid time value");

  const localizeOptions = Object.assign({}, options, {
    addSuffix: options?.addSuffix,
    comparison: comparison as -1 | 0 | 1,
  });

  const [laterDate_, earlierDate_] = normalizeDates(
    options?.in,
    ...(comparison > 0 ? [earlierDate, laterDate] : [laterDate, earlierDate]),
  );

  const seconds = differenceInSeconds(earlierDate_, laterDate_);
  const offsetInSeconds =
    (getTimezoneOffsetInMilliseconds(earlierDate_) -
      getTimezoneOffsetInMilliseconds(laterDate_)) /
    1000;
  const minutes = Math.round((seconds - offsetInSeconds) / 60);
  let months;

  // 0 up to 2 mins
  if (minutes < 2) {
    if (options?.includeSeconds) {
      if (seconds < 5) {
        return locale.formatDistance("lessThanXSeconds", 5, localizeOptions);
      } else if (seconds < 10) {
        return locale.formatDistance("lessThanXSeconds", 10, localizeOptions);
      } else if (seconds < 20) {
        return locale.formatDistance("lessThanXSeconds", 20, localizeOptions);
      } else if (seconds < 40) {
        return locale.formatDistance("halfAMinute", 0, localizeOptions);
      } else if (seconds < 60) {
        return locale.formatDistance("lessThanXMinutes", 1, localizeOptions);
      } else {
        return locale.formatDistance("xMinutes", 1, localizeOptions);
      }
    } else {
      if (minutes === 0) {
        return locale.formatDistance("lessThanXMinutes", 1, localizeOptions);
      } else {
        return locale.formatDistance("xMinutes", minutes, localizeOptions);
      }
    }

    // 2 mins up to 0.75 hrs
  } else if (minutes < 45) {
    return locale.formatDistance("xMinutes", minutes, localizeOptions);