timetracker/games/static/js/utils.js

/**
 * @description Formats Date to a UTC string accepted by the datetime-local input field.
 * @param {Date} date
 * @returns {string}
 */
export function toISOUTCString(date) {
  function stringAndPad(number) {
    return number.toString().padStart(2, 0);
  }
  return `${
    date.getFullYear()}-
    ${stringAndPad(date.getMonth() + 1)}-
    ${stringAndPad(date.getDate())}T
    ${stringAndPad(date.getHours())}:
    ${stringAndPad(date.getMinutes())
  }`;
}