Function calendar

src/chronos/moment/calendar.ts:39–66

(date: Date,
                         time: Date,
                         formats: CalendarSpec,
                         locale: Locale = getLocale(),
                         config: DateParsingConfig = {})

}

export function calendar(date: Date,
                         time: Date,
                         formats: CalendarSpec,
                         locale: Locale = getLocale(),
                         config: DateParsingConfig = {}): string {
  // We want to compare the start of today, vs this.
  // Getting start-of-today depends on whether we're local/utc/offset or not.
  const now = time;
  const sod = startOf(cloneWithOffset(now, date,  config), 'day', config._isUTC);
  const format = getCalendarFormat(date, sod, {_isUTC: true, _offset: 0}) || 'sameElse';

  let output;
  if (formats) {
    const _format = formats[format];
    if (isString(_format)) {
      output = _format;
    }
    if (isFunction(_format)) {
      output = _format.call(null, date, now);
    }
  }

  if (!output) {
    output = locale.calendar(format, date, cloneDate(now));
  }

  return formatDate(date, output, config._locale._abbr, config._isUTC, config._offset);
}