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

You can use the isThisQuarter() function from the date-fns library in JavaScript to check if a given date is in the current quarter or not. Here's an example:

index.tsx
const { isThisQuarter } = require('date-fns');

const today = new Date();
console.log(isThisQuarter(today)); // true

const someDate = new Date('2021-08-01');
console.log(isThisQuarter(someDate)); // true

const nonQuarterDate = new Date('2021-09-15');
console.log(isThisQuarter(nonQuarterDate)); // false
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In the above code snippet, we first import the isThisQuarter function from the date-fns library. We then use it to check whether the current date (today), a given date (someDate), and another non-quarter date (nonQuarterDate) fall in the current quarter or not.

The isThisQuarter() function returns a boolean (true or false) based on whether the given date is in the current quarter or not. If it's in the current quarter, it returns true; otherwise, it returns false.