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

To use the startOfYear function from the date-fns library in TypeScript, you'll need to import it like this:

index.ts
import { startOfYear } from 'date-fns';
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Then, you can use the function to get the start of the year for a given Date object like this:

index.ts
const date = new Date('2022-02-14');
const startOfYearDate = startOfYear(date); // returns January 1st, 2022
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Note that the startOfYear function returns a new Date object representing the start of the year, and does not modify the original Date object. By default, the function sets the time component of the new object to 00:00:00.000.