how to use the getweekyear function from the date-fns library in typescript

To use the getWeekYear function from the date-fns library in TypeScript, first ensure that date-fns is properly installed in your project. You can install it using either npm or yarn, depending on what you're using for package management:

index.ts
npm install date-fns
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or

index.ts
yarn add date-fns
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Once you've installed date-fns, you can import the getWeekYear function into your TypeScript file using:

index.ts
import { getWeekYear } from 'date-fns';
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The getWeekYear function takes a date (Date object) as its argument and returns the year of the ISO week that the date belongs to. For example, if the given date falls between December 28th and January 3rd (inclusive), the function will return the year of the next ISO week. Here's an example usage of the function:

index.ts
const date = new Date('2021-10-23');
const weekYear = getWeekYear(date); // 2021
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Note that the getWeekYear function considers the ISO week numbering system, which defines the first week of a year as the one that contains the first Thursday of that year. So if your date falls in the last week of December, the week year returned by the function may be different from the calendar year of the date.

That's the basic usage of the getWeekYear function from the date-fns library in TypeScript. I hope this helps!