getISOWeek
import { getISOWeek } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// Which week of the ISO-week numbering year is 2 January 2005?
const result = getISOWeek(new Date(2005, 0, 2))
//=> 53
function getISOWeek<DateType extends Date>(date: DateType | number | string): number;