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import startOfWeek from "../startOfWeek/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
/**
* @name startOfISOWeek
* @category ISO Week Helpers
* @summary Return the start of an ISO week for the given date.
*
* @description
* Return the start of an ISO week for the given date.
* The result will be in the local timezone.
*
* 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 original date
* @returns {Date} the start of an ISO week
* @throws {TypeError} 1 argument required
*
* @example
* // The start of an ISO week for 2 September 2014 11:55:00:
* var result = startOfISOWeek(new Date(2014, 8, 2, 11, 55, 0))
* //=> Mon Sep 01 2014 00:00:00
*/
export default function startOfISOWeek(dirtyDate) {
requiredArgs(1, arguments);
return startOfWeek(dirtyDate, {
weekStartsOn: 1
});
}
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