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

The closestIndexTo function from the date-fns library can be used to find the index of the date closest to a given date from an array of dates. Here is an example of how to use the closestIndexTo function in TypeScript:

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 closestIndexTo function from the date-fns library:

   index.ts
   import { closestIndexTo } from 'date-fns';
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3. Create an array of dates:

   index.ts
   const dates = [
     new Date(2022, 0, 1),
     new Date(2022, 0, 2),
     new Date(2022, 0, 3),
     new Date(2022, 0, 4),
     new Date(2022, 0, 5),
   ];
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4. Call the closestIndexTo function with the target date and the array of dates:

   index.ts
   const targetDate = new Date(2022, 0, 6);
   const closestIndex = closestIndexTo(targetDate, dates);
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   The closestIndex variable will contain the index of the date closest to the targetDate in the dates array.

Here is the complete example code:

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

const dates = [
  new Date(2022, 0, 1),
  new Date(2022, 0, 2),
  new Date(2022, 0, 3),
  new Date(2022, 0, 4),
  new Date(2022, 0, 5),
];

const targetDate = new Date(2022, 0, 6);
const closestIndex = closestIndexTo(targetDate, dates);

console.log(closestIndex); // Output: 4
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