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

To use the getDaysInMonth function from the date-fns library in JavaScript, you can follow these steps:

First, you need to install the date-fns library using a package manager like npm.


npm install date-fns
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Import the getDaysInMonth function in your JavaScript file.


index.tsx
import { getDaysInMonth } from 'date-fns';
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Now you can use the getDaysInMonth function to get the number of days in a month.


index.tsx
const numberOfDays = getDaysInMonth(new Date(2021, 0)); // 31
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The getDaysInMonth function takes a Date object as its first argument, which represents the month for which you want to get the number of days. You can also pass a second argument to specify the year. If you don't pass a second argument, the current year will be used by default.

In this example, new Date(2021, 0) represents January 2021. The getDaysInMonth function returns the number of days in January, which is 31.

You can use this function to get the number of days in any month by passing a Date object that represents that month.