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

To use the subISOWeekYears function from the date-fns library in TypeScript, you can follow the below steps.

1. Install date-fns library as a dependency in your project using npm or Yarn.

npm install date-fns
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or

yarn add date-fns
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2. Import the subISOWeekYears function in your TypeScript file where you want to use it.

import { subISOWeekYears } from 'date-fns';
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3. Use the subISOWeekYears function to subtract the specified number of ISO week-numbering years from the given date.

const myDate = new Date('2022-07-01');
const yearsToSubtract = 2;

const newDate = subISOWeekYears(myDate, yearsToSubtract);

console.log(newDate); // Output: 2020-07-03T00:00:00.000Z
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In the above example, we are subtracting 2 ISO week-numbering years from the date 2022-07-01 and the output is 2020-07-03T00:00:00.000Z. The subISOWeekYears function takes two arguments - the first argument is the date to subtract years from, and the second argument is the number of ISO week-numbering years to subtract.