Source: isSameDay/index.js

import startOfDay from '../startOfDay/index'
import requiredArgs from '../_lib/requiredArgs/index'

/**
 * @name isSameDay
 * @category Day Helpers
 * @summary Are the given dates in the same day?
 *
 * @description
 * Are the given dates in the same day?
 *
 * ### 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 first date to check
 * @param {Date|Number} dateRight - the second date to check
 * @returns {Boolean} the dates are in the same day
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // Are 4 September 06:00:00 and 4 September 18:00:00 in the same day?
 * var result = isSameDay(new Date(2014, 8, 4, 6, 0), new Date(2014, 8, 4, 18, 0))
 * //=> true
 */
export default function isSameDay(dirtyDateLeft, dirtyDateRight) {
  requiredArgs(2, arguments)

  var dateLeftStartOfDay = startOfDay(dirtyDateLeft)
  var dateRightStartOfDay = startOfDay(dirtyDateRight)

  return dateLeftStartOfDay.getTime() === dateRightStartOfDay.getTime()
}