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

differenceInBusinessDays is a function provided by the date-fns library to calculate the number of business days between two dates. Here is an example of how to use this function in TypeScript:

First, install the date-fns library using the following command:

index.ts
npm install date-fns
21 chars
2 lines

Once installed, import the differenceInBusinessDays function in your TypeScript file:

index.ts
import { differenceInBusinessDays } from 'date-fns';
53 chars
2 lines

Now, you can call the differenceInBusinessDays function by passing two date objects as arguments:

index.ts
const startDate = new Date('2022-01-01');
const endDate = new Date('2022-01-31');
const businessDays = differenceInBusinessDays(endDate, startDate);
console.log(`Number of business days between ${startDate} and ${endDate} is ${businessDays}`);
244 chars
5 lines

This will output the following message in the console:

index.ts
Number of business days between Sat Jan 01 2022 00:00:00 GMT+0530 (India Standard Time) and Mon Jan 31 2022 00:00:00 GMT+0530 (India Standard Time) is 22
154 chars
2 lines

Note that startDate should always come before endDate. If endDate is before startDate, differenceInBusinessDays will return a negative number.