engelsystem/resources/assets/js/date.js

/**
 * Formats a Date to HH:MM, e.g. 09:23 or 13:37
 *
 * @param {Date} date
 * @returns {string|undefined} Formatted time or undefined for non-Date
 */
export const formatTime = (date) => {
  if (!date instanceof Date) return;

  return String(date.getHours()).padStart(2, '0') + ':'
        + String(date.getMinutes()).padStart(2, '0');
}

/**
 * Formats a Date to YYYY-MM-DD, e.g. 2023-05-18
 *
 * @param {Date} date
 * @returns {string|undefined} Formatted date or undefined for non-Date
 */
export const formatDay = (date) => {
  if (!date instanceof Date) return;

  return String(date.getFullYear()) + '-'
        + String(date.getMonth() + 1).padStart(2, '0') + '-'
        + String(date.getDate()).padStart(2, '0');
}