sectom/private/formatDate.js

Sectom is a useful npm package that has multiple easy to use functions.

/**
 *
 * @param {Date} d
 * @param {number} offset
 * @returns {string}
 */
function formatDate(d, offset) {
  function z(n) {
    return ("0" + n).slice(-2);
  }
  // Default offset to 0
  offset = offset || 0;
  // Generate offset string
  var offSign = offset < 0 ? "-" : "+";
  offset = Math.abs(offset);
  var offString =
    offSign +
    ("0" + ((offset / 60) | 0)).slice(-2) +
    ":" +
    ("0" + (offset % 60)).slice(-2);
  // Generate date string
  return (
    d.getUTCFullYear() +
    "-" +
    z(d.getUTCMonth() + 1) +
    "-" +
    z(d.getUTCDate()) +
    "T" +
    z(d.getUTCHours()) +
    ":" +
    z(d.getUTCMinutes()) +
    ":" +
    z(d.getUTCSeconds()) +
    offString
  );
}

module.exports = formatDate;