import { getWeek } from "https://deno.land/x/date_fns@v2.6.0/index.js";
Examples
// Which week of the local week numbering year is 2 January 2005 with default options?
var result = getISOWeek(new Date(2005, 0, 2))
//=> 2
// Which week of the local week numbering year is 2 January 2005 with default options? var result = getISOWeek(new Date(2005, 0, 2)) //=> 2
// Which week of the local week numbering year is 2 January 2005, // if Monday is the first day of the week, // and the first week of the year always contains 4 January? var result = getISOWeek(new Date(2005, 0, 2), { weekStartsOn: 1, firstWeekContainsDate: 4 }) //=> 53