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

The isSunday function from the date-fns library can be used to determine if a given date object is a Sunday or not. Here is an example of how to use it:

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

const date1 = new Date('2021-08-01');
const date2 = new Date('2021-08-02');

console.log(isSunday(date1)); // true
console.log(isSunday(date2)); // false
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In this example, we first import the isSunday function from the date-fns library using the require statement.

We then create two Date objects representing August 1st and 2nd, 2021. We pass each of these Date objects to the isSunday function and log the result to the console.

The first call to isSunday returns true because August 1st, 2021 was a Sunday, while the second call returns false because August 2nd, 2021 was not a Sunday.