How do I handle NaN values in JavaScript?

How do I handle NaN values in JavaScript?

In JavaScript, you can check for NaN using the isNaN() function or Number.isNaN(). Would you like examples?

Yes, please provide some examples.

Sure! Here's an example:

let value = NaN;
console.log(isNaN(value)); // true
console.log(Number.isNaN(value)); // true

The first method checks if the value is NaN, while the second is more strict.

What if I want to replace NaN with a default value?

You can use the logical OR operator or the nullish coalescing operator:

let value = NaN;
let safeValue = value || 0; // 0 if value is falsy
let safeValue2 = value ?? 0; // 0 if value is null or undefined