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

To use the subISOWeekYears function from the date-fns library in JavaScript, you will need to install the date-fns package first:

index.tsx
npm install date-fns
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Then, you can import the function into your code:

import { subISOWeekYears } from 'date-fns';
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The subISOWeekYears function is used to subtract a number of ISO week-numbering years from a given date. It takes two arguments: the date to subtract from, and the number of years to subtract. Here's an example:

const date = new Date('2022-06-01');
const numYears = 2;

const result = subISOWeekYears(date, numYears);
console.log(result); // Output: Mon May 31 2021 00:00:00 GMT-0700 (Pacific Daylight Time)
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In this example, we are subtracting two ISO week-numbering years from June 1st, 2022, which results in May 31st, 2021.