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

To use the isFirstDayOfMonth function from date-fns library in TypeScript, we need to first install the date-fns library using the following command:

npm install date-fns
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After installing the date-fns library, we can import the isFirstDayOfMonth function from the library as shown below:

index.ts
import { isFirstDayOfMonth } from 'date-fns';
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Once we have imported the function, we can use it in our TypeScript code as shown below:

index.ts
const date = new Date('2022-01-01');

if (isFirstDayOfMonth(date)) {
  console.log('Date is the first day of the month');
} else {
  console.log('Date is not the first day of the month');
}
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In the above code, we first create a new Date object with "2022-01-01" as the input. We then use the isFirstDayOfMonth function to check if the date is the first day of the month, and log the result accordingly.

Note that the isFirstDayOfMonth function returns a boolean value, true if the date is the first day of the month, and false otherwise.