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
21 chars
2 lines

2. Import the isleapyear function from the date-fns library at the top of your JavaScript file:

index.tsx
import { isLeapYear } from 'date-fns';
39 chars
2 lines

3. 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
80 chars
3 lines

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.