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

To use the lastDayOfDecade function from date-fns in JavaScript, you need to first install the date-fns library in your project. You can do this by running the following command in your terminal:

index.tsx
npm install date-fns
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Once installed, you can import the lastDayOfDecade function and use it to find the last day of the decade for a given date. Here is an example:

index.tsx
// Import the date-fns library
import { lastDayOfDecade } from 'date-fns';

// Create a date object for December 31, 2019
const date = new Date(2019, 11, 31);

// Use the lastDayOfDecade function to find the last day of the decade for 2019
const lastDayOfDecade = lastDayOfDecade(date);

console.log(lastDayOfDecade); // Output: Mon Dec 31 2029 00:00:00 GMT-0500 (Eastern Standard Time)
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In this example, we import the lastDayOfDecade function from the date-fns library. We then create a new Date object for December 31, 2019. We pass this date to the lastDayOfDecade function to find the last day of the decade for this date. The result is a new Date object representing the last day of the decade, which we log to the console.

Note that the lastDayOfDecade function returns a new Date object, so you can use it to find the last day of the decade for any date.