Function parseMinParts

core/src/components/datetime/utils/parse.ts:203–237

(min: string, todayParts: DatetimeParts)

 * month, day, hour, and minute information.
 */
export const parseMinParts = (min: string, todayParts: DatetimeParts): DatetimeParts | undefined => {
  const result = parseDate(min);

  /**
   * If min was not a valid date then return undefined.
   */
  if (result === undefined) {
    return;
  }

  const { month, day, year, hour, minute } = result;

  /**
   * When passing in `max` or `min`, developers
   * can pass in any ISO-8601 string. This means
   * that not all of the date/time fields are defined.
   * For example, passing max="2012" is valid even though
   * there is no month, day, hour, or minute data.
   * However, all of this data is required when clamping the date
   * so that the correct initial value can be selected. As a result,
   * we need to fill in any omitted data with the min or max values.
   */
  return {
    month: month ?? 1,
    day: day ?? 1,
    /**
     * Passing in "HH:mm" is a valid ISO-8601
     * string, so we just default to the current year
     * in this case.
     */
    year: year ?? todayParts.year,
    hour: hour ?? 0,
    minute: minute ?? 0,
  };
};