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import toDate from "../toDate/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
/**
* @name getISODay
* @category Weekday Helpers
* @summary Get the day of the ISO week of the given date.
*
* @description
* Get the day of the ISO week of the given date,
* which is 7 for Sunday, 1 for Monday etc.
*
* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_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 given date
* @returns {Number} the day of ISO week
* @throws {TypeError} 1 argument required
*
* @example
* // Which day of the ISO week is 26 February 2012?
* const result = getISODay(new Date(2012, 1, 26))
* //=> 7
*/
export default function getISODay(dirtyDate) {
requiredArgs(1, arguments);
var date = toDate(dirtyDate);
var day = date.getDay();
if (day === 0) {
day = 7;
}
return day;
}