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

To use the getOverlappingDaysInIntervals function from the date-fns library in TypeScript, you need to first install the library using npm or yarn, and then import the function in your TypeScript file.

Here's an example of how to use the getOverlappingDaysInIntervals function to find the number of overlapping days between two date intervals:

index.ts
import { getOverlappingDaysInIntervals } from 'date-fns';

// Define two date intervals
const interval1 = {
  start: new Date(2022, 0, 1),
  end: new Date(2022, 0, 10),
};

const interval2 = {
  start: new Date(2022, 0, 5),
  end: new Date(2022, 0, 15),
};

// Calculate the overlapping days between the two intervals
const overlappingDays = getOverlappingDaysInIntervals(interval1, interval2);

console.log(overlappingDays); // Output: 5
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In this example, we first import the getOverlappingDaysInIntervals function from the date-fns library. We then define two date intervals using the Date constructor, and pass them as input to the getOverlappingDaysInIntervals function.

The function returns the number of overlapping days between the two intervals, which we then log to the console.

Make sure to import the Date and getOverlappingDaysInIntervals types from the date-fns package in your TypeScript file.