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

To use the lastdayofisoweekyear function from the date-fns library in TypeScript, you need to follow the below steps:

1. Install the date-fns library:

   index.ts
   npm install date-fns
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2. Import the lastDayOfISOWeekYear function from the date-fns library:

   index.ts
   import { lastDayOfISOWeekYear } from 'date-fns';
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3. Call the imported function by passing the ISO week year number as the argument:

   index.ts
   const lastDayOfYear = lastDayOfISOWeekYear(2021);
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4. The return value from the function call would be a Date object representing the last day of the specified ISO week year.

Here's the complete example code snippet:

index.ts
import { lastDayOfISOWeekYear } from 'date-fns';

const isoWeekYear = 2021;
const lastDayOfYear = lastDayOfISOWeekYear(isoWeekYear);

console.log(`Last day of ISO week year ${isoWeekYear}: ${lastDayOfYear}`);
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In the above code, lastDayOfYear variable will contain the date object representing the last day of the 2021 ISO week year.