When should I use null in JavaScript?

When should I use null in JavaScript?

You should use null to represent the intentional absence of any object value. It's a way to indicate that a variable is empty.

How is null different from undefined?

Null is an assignment value, while undefined means a variable has been declared but not assigned a value.

Can I use null for checking if an object exists?

Yes, you can use null to check if an object is intentionally set to no value, which can help in conditional statements.

Are there any best practices for using null?

It's best to use null when you want to explicitly indicate that a variable should have no value, rather than leaving it undefined.