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

To use the intervalToDuration() function from the date-fns library in TypeScript, first you need to install the library by running:

index.ts
npm install date-fns
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Then, to use the intervalToDuration() function, you can import it from the library and call it with two arguments: the start date and the end date of the interval you want to calculate the duration for. Here's an example:

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

const startDate = new Date('2021-06-01');
const endDate = new Date('2021-06-05');

const duration = intervalToDuration({ start: startDate, end: endDate });

console.log(duration); // { years: 0, months: 0, days: 4, hours: 0, minutes: 0, seconds: 0 }
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In this example, the intervalToDuration() function calculates the duration between the startDate and endDate parameters and returns an object with properties for each part of the duration (years, months, days, hours, minutes, and seconds). The duration is { years: 0, months: 0, days: 4, hours: 0, minutes: 0, seconds: 0 }, indicating that the interval between the two dates is four days.

Note that you can also pass an optional third argument to the intervalToDuration() function to specify additional options, such as whether to round up or down when calculating the duration. See the date-fns documentation for more information on the available options.