startOfWeekYear
import { startOfWeekYear } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// The start of an a week-numbering year for 2 July 2005 with default settings:
const result = startOfWeekYear(new Date(2005, 6, 2))
//=> Sun Dec 26 2004 00:00:00
@example
// The start of a week-numbering year for 2 July 2005
// if Monday is the first day of week
// and 4 January is always in the first week of the year:
const result = startOfWeekYear(new Date(2005, 6, 2), {
weekStartsOn: 1,
firstWeekContainsDate: 4
})
//=> Mon Jan 03 2005 00:00:00
function startOfWeekYear<DateType extends Date>(date: DateType | number | string, options?: StartOfWeekYearOptions): DateType;
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startOfWeekYear<DateType extends Date>(date: DateType | number | string, options?: StartOfWeekYearOptions): DateType
[src]§Parameters
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options?: StartOfWeekYearOptions optional
[src]- An object with options