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

To use the subdays function from the date-fns library in TypeScript, you can install the library through npm and import the function in your TypeScript file.

First, install the date-fns library using npm:

index.ts
npm install date-fns
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Then, import the subDays function in your TypeScript file:

index.ts
import { subDays } from 'date-fns';
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You can then use the subDays function to subtract a specified number of days from a date. Here's an example:

index.ts
const myDate = new Date('2021-09-28');
const numDaysToSubtract = 3;

const newDate = subDays(myDate, numDaysToSubtract);

console.log(newDate); // Output: 2021-09-25T00:00:00.000Z
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In this example, we use the subDays function to subtract 3 days from the myDate variable, which is set to September 28, 2021. The subDays function returns a new date object that represents the result of subtracting the specified number of days from the input date. The output shows that the new date is September 25, 2021.