import toInteger from '../_lib/toInteger/index.ts'import toDate from '../toDate/index.ts'import requiredArgs from '../_lib/requiredArgs/index.ts'
/** * @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 */export default function addDays( dirtyDate: Date | number, dirtyAmount: number): Date { requiredArgs(2, arguments)
const date = toDate(dirtyDate) const 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}