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import toDate from '../toDate/index'
import requiredArgs from '../_lib/requiredArgs/index'
/**
* @name isMonday
* @category Weekday Helpers
* @summary Is the given date Monday?
*
* @description
* Is the given date Monday?
*
* ### 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 Monday
* @throws {TypeError} 1 argument required
*
* @example
* // Is 22 September 2014 Monday?
* var result = isMonday(new Date(2014, 8, 22))
* //=> true
*/
export default function isMonday(date: Date | number): boolean {
requiredArgs(1, arguments)
return toDate(date).getDay() === 1
}
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