import { i as isSameDay } from './index-a8ebe06c.js';
import { r as requiredArgs, t as toDate, l as toInteger } from './index-4456ba1e.js';

/**
 * @name isToday
 * @category Day Helpers
 * @summary Is the given date today?
 * @pure false
 *
 * @description
 * Is the given date today?
 *
 * > ⚠️ Please note that this function is not present in the FP submodule as
 * > it uses `Date.now()` internally hence impure and can't be safely curried.
 *
 * ### 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} date - the date to check
 * @returns {Boolean} the date is today
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // If today is 6 October 2014, is 6 October 14:00:00 today?
 * var result = isToday(new Date(2014, 9, 6, 14, 0))
 * //=> true
 */

function isToday(dirtyDate) {
  requiredArgs(1, arguments);
  return isSameDay(dirtyDate, Date.now());
}

/**
 * @name addDays
 * @category Day Helpers
 * @summary Add the specified number of days to the given date.
 *
 * @description
 * Add the specified number of days to the given date.
 *
 * ### 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} date - the date to be changed
 * @param {Number} amount - the amount of days to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} - the new date with the days added
 * @throws {TypeError} - 2 arguments required
 *
 * @example
 * // Add 10 days to 1 September 2014:
 * const result = addDays(new Date(2014, 8, 1), 10)
 * //=> Thu Sep 11 2014 00:00:00
 */

function addDays(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var date = toDate(dirtyDate);
  var amount = toInteger(dirtyAmount);

  if (isNaN(amount)) {
    return new Date(NaN);
  }

  if (!amount) {
    // If 0 days, no-op to avoid changing times in the hour before end of DST
    return date;
  }

  date.setDate(date.getDate() + amount);
  return date;
}

/**
 * @name subDays
 * @category Day Helpers
 * @summary Subtract the specified number of days from the given date.
 *
 * @description
 * Subtract the specified number of days from the given date.
 *
 * ### 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} date - the date to be changed
 * @param {Number} amount - the amount of days to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
 * @returns {Date} the new date with the days subtracted
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Subtract 10 days from 1 September 2014:
 * const result = subDays(new Date(2014, 8, 1), 10)
 * //=> Fri Aug 22 2014 00:00:00
 */

function subDays(dirtyDate, dirtyAmount) {
  requiredArgs(2, arguments);
  var amount = toInteger(dirtyAmount);
  return addDays(dirtyDate, -amount);
}

/**
 * @name isYesterday
 * @category Day Helpers
 * @summary Is the given date yesterday?
 * @pure false
 *
 * @description
 * Is the given date yesterday?
 *
 * > ⚠️ Please note that this function is not present in the FP submodule as
 * > it uses `Date.now()` internally hence impure and can't be safely curried.
 *
 * ### 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} date - the date to check
 * @returns {Boolean} the date is yesterday
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // If today is 6 October 2014, is 5 October 14:00:00 yesterday?
 * var result = isYesterday(new Date(2014, 9, 5, 14, 0))
 * //=> true
 */

function isYesterday(dirtyDate) {
  requiredArgs(1, arguments);
  return isSameDay(dirtyDate, subDays(Date.now(), 1));
}

export { isYesterday as a, isToday as i };
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