how to use the subdays function from date-fns in javascript

The subdays function from date-fns is used to subtract a specified number of days from a given date. Here's how you can use it in JavaScript:

1. First, install the date-fns library using npm or yarn:

# using npm
npm install date-fns

# using yarn
yarn add date-fns
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2. Import the subdays function in your JavaScript file:

index.tsx
import { subDays } from 'date-fns';
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3. Use the subdays function to subtract days from a date:

index.tsx
const today = new Date(); // e.g. 2021-09-01

const threeDaysAgo = subDays(today, 3); // subtract 3 days from today's date
console.log(threeDaysAgo); // output: 2021-08-29T22:00:00.000Z (depending on your timezone)
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The subdays function takes two arguments: the first is the date you want to subtract days from, and the second is the number of days to subtract (as an integer). The function returns a new Date object with the specified number of days subtracted.