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

To use the differenceInQuarters function from date-fns library in JavaScript, you need to first install the library via npm or yarn.

npm install date-fns
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Once it is installed, you can import the function and use it in your JavaScript code as shown below:

index.tsx
import { differenceInQuarters } from 'date-fns';

const start = new Date(2022, 0, 1);
const end = new Date(2022, 9, 15);

const difference = differenceInQuarters(end, start);

console.log(difference); // Output: 3
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Here, we have imported the differenceInQuarters function from date-fns. The function takes two arguments, end and start, which are Date objects representing the dates you want to calculate the difference between.

The function returns the difference between the two dates in quarters, i.e., the number of full three-month periods between the two dates.

In the example above, we have created two Date objects representing January 1, 2022 and October 15, 2022. We have then passed these dates to the differenceInQuarters function, which returns 3 since there are 3 full quarters between the two dates (Q1, Q2, and Q3).