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

To use the isleapyear function from the date-fns library in JavaScript, follow these steps:

  1. Install the date-fns library using your preferred package manager. For example, using npm:
npm install date-fns
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  1. Import the isleapyear function from the date-fns library at the top of your JavaScript file:
index.tsx
import { isLeapYear } from 'date-fns';
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  1. Call the isleapyear function and pass it a Date or a valid date string as an argument:
index.tsx
const result = isLeapYear(new Date('2020-01-01'));
console.log(result); // true
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The isleapyear function returns a boolean value that indicates whether the given year is a leap year or not. In the example above, the function returns true because 2020 is a leap year.

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