how to use the getweek function from date-fns in javascript

To use the getWeek function from date-fns, first you need to install the package using npm or yarn.

npm install date-fns
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Then, import the getWeek function and use it with a Date object as its parameter:

index.tsx
import { getWeek } from 'date-fns';

const date = new Date('2022-03-20');
const week = getWeek(date);

console.log(week);  // Output: 12
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The getWeek function returns the number of the week in the year for the given date. In the example, date is set to March 20th, 2022, which is in the 12th week of the year. The week variable will therefore have a value of 12.