date-fns/add.d.cts

Modern JavaScript date utility library

import type { ContextOptions, DateArg, Duration } from "./types.ts";
/**
 * The {@link add} function options.
 */
export interface AddOptions<DateType extends Date = Date>
  extends ContextOptions<DateType> {}
/**
 * @name add
 * @category Common Helpers
 * @summary Add the specified years, months, weeks, days, hours, minutes, and seconds to the given date.
 *
 * @description
 * Add the specified years, months, weeks, days, hours, minutes, and seconds to the given date.
 *
 * **You don't need date-fns\***:
 *
 * Temporal has a built-in `add` method on all its classes:
 *
 * - [`Temporal.Instant.prototype.add()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/Instant/add)
 * - [`Temporal.PlainDate.prototype.add()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainDate/add)
 * - [`Temporal.PlainDateTime.prototype.add()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainDateTime/add)
 * - [`Temporal.PlainTime.prototype.add()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainTime/add)
 * - [`Temporal.PlainYearMonth.prototype.add()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/PlainYearMonth/add)
 * - [`Temporal.ZonedDateTime.prototype.add()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/add)
 *
 * \* **Not really**, see: https://date-fns.org/you-dont-need-date-fns
 *
 * @typeParam DateType - The `Date` type the function operates on. Gets inferred from passed arguments. Allows using extensions like [`UTCDate`](https://github.com/date-fns/utc).
 * @typeParam ResultDate - The result `Date` type, it is the type returned from the context function if it is passed, or inferred from the arguments.
 *
 * @param date - The date to be changed
 * @param duration - The object with years, months, weeks, days, hours, minutes, and seconds to be added.
 * @param options - An object with options
 *
 * @returns The new date with the seconds added
 *
 * @example
 * // Add the following duration to 1 September 2014, 10:19:50
 * const result = add(new Date(2014, 8, 1, 10, 19, 50), {
 *   years: 2,
 *   months: 9,
 *   weeks: 1,
 *   days: 7,
 *   hours: 5,
 *   minutes: 9,
 *   seconds: 30,
 * })
 * //=> Thu Jun 15 2017 15:29:20
 *
 * @example
 * // Using Temporal:
 * // Add the following duration to 1 September 2014, 10:19:50
 * Temporal.PlainDateTime.from("2014-09-01T10:19:50")
 *   .add({
 *     years: 2,
 *     months: 9,
 *     weeks: 1,
 *     days: 7,
 *     hours: 5,
 *     minutes: 9,
 *     seconds: 30,
 *   })
 *   .toString();
 * //=> "2017-06-15T15:29:20"
 */
export declare function add<
  DateType extends Date,
  ResultDate extends Date = DateType,
>(
  date: DateArg<DateType>,
  duration: Duration,
  options?: AddOptions<ResultDate> | undefined,
): ResultDate;
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