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

The startOfDecade function from date-fns library can be used in TypeScript with the following steps:

1. Install the date-fns library using npm or yarn. Run the following command in the terminal:

   index.ts
   npm install date-fns
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   or

   index.ts
   yarn add date-fns
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2. Import the startOfDecade function in your TypeScript file:

   index.ts
   import { startOfDecade } from 'date-fns';
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3. Use the startOfDecade function with a Date object to get the start of the decade:

   index.ts
   const date = new Date('2021-08-17');
   const startOfDecade = startOfDecade(date);
   console.log(startOfDecade); // Output: 2020-01-01T00:00:00.000Z
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   The startOfDecade function returns a new Date object set to the start of the decade.

4. If you get a TypeScript error like TypeError: startOfDecade is not a function, you may need to add the "esModuleInterop": true option to your tsconfig.json file:

   {
     "compilerOptions": {
       "esModuleInterop": true
     }
   }
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   This option allows you to import default exports from libraries that do not have a default export.