startOfMonth.d.ts 1.2 KB

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  1. import type { ContextOptions, DateArg } from "./types.js";
  2. /**
  3. * The {@link startOfMonth} function options.
  4. */
  5. export interface StartOfMonthOptions<ResultDate extends Date>
  6. extends ContextOptions<ResultDate> {}
  7. /**
  8. * @name startOfMonth
  9. * @category Month Helpers
  10. * @summary Return the start of a month for the given date.
  11. *
  12. * @description
  13. * Return the start of a month for the given date. The result will be in the local timezone.
  14. *
  15. * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments.
  16. * Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
  17. * @typeParam ResultDate - The result `Date` type, it is the type returned from the context function if it is passed,
  18. * or inferred from the arguments.
  19. *
  20. * @param date - The original date
  21. * @param options - An object with options
  22. *
  23. * @returns The start of a month
  24. *
  25. * @example
  26. * // The start of a month for 2 September 2014 11:55:00:
  27. * const result = startOfMonth(new Date(2014, 8, 2, 11, 55, 0))
  28. * //=> Mon Sep 01 2014 00:00:00
  29. */
  30. export declare function startOfMonth<
  31. DateType extends Date,
  32. ResultDate extends Date = DateType,
  33. >(
  34. date: DateArg<DateType>,
  35. options?: StartOfMonthOptions<ResultDate> | undefined,
  36. ): ResultDate;