office-ui-fabric-react/lib/utilities/dateMath/DateMath.d.ts

Reusable React components for building experiences for Office 365.

import { DayOfWeek, DateRangeType } from '../dateValues/DateValues';
/**
 * Returns a date offset from the given date by the specified number of days.
 * @param {Date} date - The origin date
 * @param {number} days - The number of days to offset. 'days' can be negative.
 * @return {Date} A new Date object offset from the origin date by the given number of days
 */
export declare function addDays(date: Date, days: number): Date;
/**
 * Returns a date offset from the given date by the specified number of weeks.
 * @param {Date} date - The origin date
 * @param {number} weeks - The number of weeks to offset. 'weeks' can be negative.
 * @return {Date} A new Date object offset from the origin date by the given number of weeks
 */
export declare function addWeeks(date: Date, weeks: number): Date;
/**
 * Returns a date offset from the given date by the specified number of months.
 * The method tries to preserve the day-of-month; however, if the new month does not have enough days
 * to contain the original day-of-month, we'll use the last day of the new month.
 * @param {Date} date - The origin date
 * @param {number} months - The number of months to offset. 'months' can be negative.
 * @return {Date} A new Date object offset from the origin date by the given number of months
 */
export declare function addMonths(date: Date, months: number): Date;
/**
 * Returns a date offset from the given date by the specified number of years.
 * The method tries to preserve the day-of-month; however, if the new month does not have enough days
 * to contain the original day-of-month, we'll use the last day of the new month.
 * @param {Date} date - The origin date
 * @param {number} years - The number of years to offset. 'years' can be negative.
 * @return {Date} A new Date object offset from the origin date by the given number of years
 */
export declare function addYears(date: Date, years: number): Date;
/**
 * Returns a date that is a copy of the given date, aside from the month changing to the given month.
 *  The method tries to preserve the day-of-month; however, if the new month does not have enough days
 * to contain the original day-of-month, we'll use the last day of the new month.
 * @param {Date} date - The origin date
 * @param {number} month - The 0-based index of the month to set on the date.
 * @return {Date} A new Date object with the given month set.
 */
export declare function setMonth(date: Date, month: number): Date;
/**
 * Compares two dates, and returns true if the two dates (not accounting for time-of-day) are equal.
 * @return {boolean} True if the two dates represent the same date (regardless of time-of-day), false otherwise.
 */
export declare function compareDates(date1: Date, date2: Date): boolean;
/**
 * Compare the date parts of two dates
 * @param {Date} date1 - The first date to compare
 * @param {Date} date2 - The second date to compare
 * @returns {Number} A negative value if date1 is earlier than date2, 0 if the dates are equal, or a positive value
 * if date1 is later than date2.
 */
export declare function compareDatePart(date1: Date, date2: Date): Number;
/**
 * Gets the date range array including the specified date. The date range array is calculated as the list
 * of dates accounting for the specified first day of the week and date range type.
 * @param {Date} date - The input date
 * @param {DateRangeType} dateRangeType - The desired date range type, i.e., day, week, month, etc.
 * @param {DayOfWeek} dayOfWeek - The first day of the week.
 * @returns {Date[]} An array of dates representing the date range containing the specified date.
 */
export declare function getDateRangeArray(date: Date, dateRangeType: DateRangeType, firstDayOfWeek: DayOfWeek): Date[];
/**
 * Checks whether the specified date is in the given date range.
 * @param {Date} date - The origin date
 * @param {Date[]} dateRange - An array of dates to do the lookup on
 * @returns {bool} True if the date matches one of the dates in the specified array, false otherwise.
 */
export declare function isInDateRangeArray(date: Date, dateRange: Date[]): boolean;