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

To use the isSaturday function from the date-fns library in TypeScript, you will need to first install the library using:

index.ts
npm install date-fns
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After installing, you can import the function in your TypeScript file like this:

index.ts
import { isSaturday } from 'date-fns';
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Once imported, you can pass a date object or a date string to the isSaturday function and it will return a boolean value indicating whether or not the provided date is a Saturday.

Here's an example:

index.ts
const someDate = new Date('2021-07-31');

if (isSaturday(someDate)) {
  console.log('This date is a Saturday!');
} else {
  console.log('This date is not a Saturday.');
}
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In the example above, we create a new Date object representing July 31st, 2021. We then pass this date to the isSaturday function, and if it returns true, we log a message saying that the date is a Saturday. If isSaturday returns false, we log a message saying that the date is not a Saturday.

Note that isSaturday is a pure function that does not modify the passed date object. It only returns a boolean value based on the day of the week of the passed date object.