How to get the number of days in given month in JavaScript

In this Article we will go through how to get the number of days in given month only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const daysInMonth = (month, year) => new Date(year, month, 0).getDate();

Parameters month is zero-based index.