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

To use the lastdayofisoweek function from the date-fns library in TypeScript, you first need to install the library by running the following command in your project directory:

npm install date-fns
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Then you can import the lastdayofisoweek function from the date-fns library like this:

index.ts
import { lastDayOfISOWeek } from 'date-fns';
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The lastDayOfISOWeek function takes one parameter, which is a date object or a string representing a date. It returns a new Date object representing the last day (Sunday) of the ISO week for the given date.

Here's an example of how to use the lastDayOfISOWeek function in TypeScript:

index.ts
const date = new Date('2021-08-27T00:00:00Z');
const lastDayOfWeek = lastDayOfISOWeek(date);
console.log(lastDayOfWeek); // Output: Sun Aug 29 2021 00:00:00 GMT+0100 (British Summer Time)
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In this example, we start by creating a new Date object representing 27th August 2021. We then pass this date object to the lastDayOfISOWeek function, which returns a new Date object representing the last day (Sunday) of the ISO week that contains the 27th August 2021. We then log this last day of the week to the console.