how to use the getdaysinyear function from the date-fns library in typescript

To use the getDaysInYear function from the date-fns library in TypeScript, you would need to import it and provide it with a date object parameter.

Here is an example code snippet:

index.ts
import { getDaysInYear } from 'date-fns';

const date = new Date('2021-01-01');
const daysInYear = getDaysInYear(date);
console.log(daysInYear); // Output: 365
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In the code above, we first import the getDaysInYear function from the date-fns library. We then create a Date object (in this case, with the date 2021-01-01). Finally, we call the getDaysInYear function and pass it our date object as a parameter to get the number of days in the calendar year of the date object (in this case, 365).