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

To use the comparedesc function from the date-fns library in TypeScript, follow the steps below:

1. Install the date-fns library using npm or yarn:

npm install date-fns
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or

yarn add date-fns
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2. Import the comparedesc function in your TypeScript file:

index.ts
import { comparedesc } from 'date-fns';
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3. Use the comparedesc function in your code to compare two dates in descending order:

index.ts
const result = comparedesc(new Date(2021, 9, 1), new Date(2021, 0, 1));
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The comparedesc function returns a number that indicates the order of the two dates. If the first date is greater than the second date, it returns -1. If the first date is less than the second date, it returns 1. If the two dates are equal, it returns 0.

You can use the result of the comparedesc function to sort an array of dates in descending order, for example:

index.ts
const dates = [
  new Date(2021, 9, 1),
  new Date(2021, 0, 1),
  new Date(2021, 4, 1),
];

dates.sort((a, b) => comparedesc(a, b));

console.log(dates); // [2021-10-01T04:00:00.000Z, 2021-05-01T04:00:00.000Z, 2021-01-01T05:00:00.000Z]
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In this example, the dates array is sorted in descending order using the comparedesc function. The result is [2021-10-01T04:00:00.000Z, 2021-05-01T04:00:00.000Z, 2021-01-01T05:00:00.000Z], which is the order of the dates from latest to earliest.