@gitlab/ui/dist/utils/datetime_utility.js

GitLab UI Components

// These utility methods come from the Gitlab repo; app/assets/javascripts/lib/utils/datetime_utility.js

/**
 * This method allows you to create new Date instance from existing
 * date instance without keeping the reference.
 *
 * @param {Date} date
 */
var newDate = function newDate(date) {
  return date instanceof Date ? new Date(date.getTime()) : new Date();
};
/**
 * Computes the difference between 2 date objects.
 *
 * @param {Date} a the start date
 * @param {Date} b the end date
 * @example
 * // returns 5
 * getDayDifference(new Date('2020-08-10'), new Date('2020-08-15'));
 * @returns {Number} Number of days between the 2 dates
 */

var getDayDifference = function getDayDifference(a, b) {
  var millisecondsPerDay = 1000 * 60 * 60 * 24;
  var date1 = Date.UTC(a.getFullYear(), a.getMonth(), a.getDate());
  var date2 = Date.UTC(b.getFullYear(), b.getMonth(), b.getDate());
  return Math.floor((date2 - date1) / millisecondsPerDay);
};
/**
 * Subtracts a given number of days from a given date and returns the new date.
 *
 * @param {Date} date the date that we will substract days from
 * @param {Number} daysInPast number of days that are subtracted from a given date
 * @example
 * // returns Mon Aug 10 2020 00:00:00
 * getDateInPast(new Date('2020-08-15'), 5);
 * @returns {Date} Date in past as Date object
 */

var getDateInPast = function getDateInPast(date, daysInPast) {
  return new Date(newDate(date).setDate(date.getDate() - daysInPast));
};
/**
 * Adds a given number of days to a given date and returns the new date.
 *
 * @param {Date} date the date that we will add days to
 * @param {Number} daysInFuture number of days that are added to a given date
 * @example
 * // returns Mon Aug 15 2020 00:00:00
 * getDateInFuture(new Date('2020-08-10'), 5);
 * @returns {Date} Date in future as Date object
 */

var getDateInFuture = function getDateInFuture(date, daysInFuture) {
  return new Date(newDate(date).setDate(date.getDate() + daysInFuture));
};
/**
 * Are the given two dates equal
 *
 * @param {Date} date1
 * @param {Date} date2
 * @returns {Boolean}
 */

var areDatesEqual = function areDatesEqual(date1, date2) {
  return Boolean(date1 && date2 && new Date(date1).getTime() === new Date(date2).getTime());
};

export { areDatesEqual, getDateInFuture, getDateInPast, getDayDifference, newDate };