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

To use the endOfQuarter function from date-fns in JavaScript, you need to follow these steps:

1. Install the date-fns package using npm or yarn:

   # npm
   npm install date-fns
   
   # yarn
   yarn add date-fns
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2. Import the endOfQuarter function in your JavaScript file:

   index.tsx
   import { endOfQuarter } from 'date-fns';
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3. Call the endOfQuarter function with a Date object or a valid date string as the argument:

   index.tsx
   const date = new Date('2021-03-15');
   const endOfQuarterDate = endOfQuarter(date);
   
   console.log(endOfQuarterDate); // Output: 2021-03-31T23:59:59.999Z
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The endOfQuarter function returns a new Date object representing the end of the quarter for the specified date. For example, if the specified date is 2021-03-15, the end of the quarter date would be 2021-03-31T23:59:59.999Z.