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

To use the addDays function from the date-fns library in TypeScript, first make sure that you have installed the @types/date-fns package which provides type definitions for TypeScript.

Then to use the addDays function, import it from the date-fns package and invoke it by passing in a date and the number of days that you want to add. Here is an example:

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

const today = new Date();
const tomorrow = addDays(today, 1);

console.log(tomorrow); // output: "2022-03-27T17:58:34.348Z"
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In this example, we first import the addDays function from the date-fns package. We then create a new Date object called today that represents the current date and time.

We then invoke the addDays function by passing in today as the first argument, and 1 as the second argument to indicate that we want to add one day to today. The addDays function returns a new Date object representing tomorrow's date, which we assign to a variable called tomorrow.

Finally, we print out the tomorrow variable to the console, which outputs the date in ISO format "yyyy-mm-ddThh:mm:ss.sssZ".