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

To use the differenceInCalendarMonths function from the date-fns library in TypeScript, you first need to install the library using npm:

index.ts
npm install date-fns
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Then you can import the function and use it in your code:

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

const date1 = new Date('2021-01-01');
const date2 = new Date('2021-04-01');

const diffInMonths = differenceInCalendarMonths(date2, date1);
console.log(`The difference in months is ${diffInMonths}`);
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In the code above, we imported the differenceInCalendarMonths function from date-fns and used it to calculate the difference in calendar months between two dates. We then logged the result to the console.

Note that differenceInCalendarMonths returns an integer, representing the number of calendar months between the two dates.