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

To use the setISOWeek function from date-fns in JavaScript, you must first install the library via a npm package manager. You can install date-fns using the following command in your terminal:

index.tsx
npm install date-fns
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Once you have installed date-fns, you can use the setISOWeek function to set the ISO week of a given date. The function takes two arguments: the Date object and the ISO week number. The function returns a new Date object with the given ISO week number.

Here is an example implementation:

index.tsx
const { setISOWeek } = require('date-fns');

const date = new Date('2021-11-11'); // Thu Nov 11 2021 00:00:00 GMT-0800 (Pacific Standard Time)
const newDate = setISOWeek(date, 48); // Sun Nov 28 2021 00:00:00 GMT-0800 (Pacific Standard Time)

console.log(newDate);
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In the above example, we imported the setISOWeek function from the date-fns library using destructuring. We created a new Date object with the value of '2021-11-11'.

We then called the setISOWeek function on this Date object, passing in 48 as the second argument to set it to the 48th ISO week of 2021. The function returned a new Date object with the adjusted ISO week.

We logged this new Date object to the console and got Sun Nov 28 2021 00:00:00 GMT-0800 (Pacific Standard Time) as the output.

Overall, the setISOWeek function is quite useful when you need to adjust the ISO week of a given Date object in JavaScript.