timestamp-convert.js

  /**
   * Convert DateTime to timestamp
   * @param {Number} y Full year 
   * @param {Number} M Month (1..12)
   * @param {Number} d Date (1..31)
   * @param {Number} h Hour (0..23)
   * @param {Number} m Minute (0..59)
   * @param {Number} s Second (0..59)
   * @param {Number} l Millisecond (0..999)
   * @oaram {Number} z Time zone
   * @returns {Number}
   */
  function date2ts([y, M, d, h, m, s, l, z]) {
    const date = new Date();
    date.setFullYear(y);
    date.setMonth(M - 1);
    date.setDate(d);
    date.setHours(h);
    date.setMinutes(m);
    date.setSeconds(s);
    if (l) {
      date.setMilliseconds(l);
    }
    if (z) {
      date.getTimezoneOffset(z);
    }
    return date.getTime();
  }

  /**
   * Convert Timestamp to DateTime
   * @param {Number} t Unix timestamp
   * @returns {Number[]}
   */
  function ts2date(t) {
    const date = new Date(t);
    const y = date.getFullYear();
    const M = date.getMonth() + 1;
    const d = date.getDate();
    const h = date.getHours();
    const m = date.getMinutes();
    const s = date.getSeconds();
    const l = date.getMilliseconds();
    const z = date.getTimezoneOffset();
    return [y, M, d, h, m, s, l, z];
  }