How to Set Default Value If Null in Javascript

In this article, you will learn how to set default value if null in Javascript.

Let’s say you have a null variable named ‘a’ with the value null.

var a = null;

In order to set a default value, you can use the nullish coalescing operator ??.

var a = null;

console.log(a ?? "a is null");

Note: The nullish coalescing operator ?? is a logical operator that functions by returning the value on its right side if the value on its left side is null or undefined. Else, it will return the value on its left side.