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

To use the lastDayOfWeek() function from date-fns in JavaScript, first, you need to install the date-fns library. You can install it via npm by running the following command:

npm install date-fns

Once you have installed the library, you can import the lastDayOfWeek() function by adding the following line to your JavaScript code:

index.tsx
const { lastDayOfWeek } = require('date-fns');
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Alternatively, you can import the library via CDN by adding the following line to your HTML file:

<script src="https://cdn.jsdelivr.net/npm/date-fns@2.20.1/esm/index.js"></script>
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After importing the function, you can use it as follows:

index.tsx
const lastDayOfWeek = lastDayOfWeek(new Date(), {weekStartsOn: 1}); // Returns the last day of the week (Sunday) based on the given date.
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The first argument to lastDayOfWeek() is the date for which you want to find the last day of the week. The second argument is an options object that you can use to set the start day of the week. In the above example, we have set the start day of the week to Monday (1). By default, the start day of the week is Sunday.

Note that the lastDayOfWeek() function returns a Date object representing the last day of the week.