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

To use the add function from the date-fns library in TypeScript, you should first install the package:

npm install date-fns
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Then, you can import the add function and use it in your code:

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

const myDate = new Date();
const result = add(myDate, { days: 2 });
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In the example above, we imported the add function from the date-fns library and called it with two parameters:

1. myDate, which is the date we want to add some time to.
2. { days: 2 }, which is an object specifying the amount of time we want to add (in this case, two days).

The add function returns a new Date object with the added time.

Note that by default, TypeScript will not infer the correct type for the second parameter of the add function. To get correct type annotations, you can import the Duration type:

index.ts
import { add, Duration } from 'date-fns';

const myDate = new Date();
const duration: Duration = { days: 2 };
const result = add(myDate, duration);
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By using the Duration type, TypeScript will ensure that you pass a valid object to the add function.