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

date-fns is a popular JavaScript library for working with dates and times. differenceInWeeks is a built-in function provided by date-fns that calculates the number of weeks between two dates.

To use differenceInWeeks, you first need to install date-fns using a package manager such as npm or yarn.

npm install date-fns
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or

yarn add date-fns
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Then you can import the differenceInWeeks function from date-fns in your JavaScript code and use it to calculate the difference between two dates in weeks.

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

const date1 = new Date(2021, 5, 1);
const date2 = new Date(2021, 5, 15);

const weeksDifference = differenceInWeeks(date1, date2);

console.log(weeksDifference); // 2
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In the example code above, the differenceInWeeks function is used to calculate the number of weeks between date1 and date2. The result is assigned to the weeksDifference variable and printed to the console.