how to use the setweek function from date-fns in javascript

To use the setWeek function from date-fns in JavaScript, first install the library by running npm install date-fns in your terminal.

Then, import the setWeek function and create a new Date object representing the date you want to modify:

index.tsx
import { setWeek } from 'date-fns';

const myDate = new Date('2022-02-07');
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Finally, call the setWeek function on this date, passing in the desired ISO week number and optional options:

index.tsx
const result = setWeek(myDate, 10, { weekStartsOn: 1 });

console.log(result); // 2022-03-07T00:00:00.000Z
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In this example, the setWeek function is used to set the week to the 10th week of the year, starting on Monday (represented by 1). The resulting date is March 7th, 2022.