Software: Apache/2.4.41 (Ubuntu). PHP/8.0.30 

uname -a: Linux apirnd 5.4.0-204-generic #224-Ubuntu SMP Thu Dec 5 13:38:28 UTC 2024 x86_64 

uid=33(www-data) gid=33(www-data) groups=33(www-data) 

Safe-mode: OFF (not secure)

/usr/local/lib/node_modules/wonlog/node_modules/date-fns/esm/differenceInYears/   drwxr-xr-x
Free 13.04 GB of 57.97 GB (22.5%)
                            Encoder    Tools    Proc.    FTP brute    Sec.    SQL    PHP-code    Update    Self remove    Logout    

Viewing file:     index.js (1.77 KB)      -rw-r--r--

import toDate from "../toDate/index.js";
import differenceInCalendarYears from "../differenceInCalendarYears/index.js";
import compareAsc from "../compareAsc/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
/**
 * @name differenceInYears
 * @category Year Helpers
 * @summary Get the number of full years between the given dates.
 *
 * @description
 * Get the number of full years between the given dates.
 *
 * ### v2.0.0 breaking changes:
 *
 * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of full years
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many full years are between 31 December 2013 and 11 February 2015?
 * const result = differenceInYears(new Date(2015, 1, 11), new Date(2013, 11, 31))
 * //=> 1
 */

export default function differenceInYears(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments);
  var dateLeft = toDate(dirtyDateLeft);
  var dateRight = toDate(dirtyDateRight);
  var sign = compareAsc(dateLeft, dateRight);
  var difference = Math.abs(differenceInCalendarYears(dateLeft, dateRight)); // Set both dates to a valid leap year for accurate comparison when dealing
  // with leap days

  dateLeft.setFullYear(1584);
  dateRight.setFullYear(1584); // Math.abs(diff in full years - diff in calendar years) === 1 if last calendar year is not full
  // If so, result must be decreased by 1 in absolute value

  var isLastYearNotFull = compareAsc(dateLeft, dateRight) === -sign;
  var result = sign * (difference - Number(isLastYearNotFull)); // Prevent negative zero

  return result === 0 ? 0 : result;
}