What is type checking for optional properties in TypeScript?

Can you explain type checking for optional properties in TypeScript?

Sure! In TypeScript, optional properties are defined using a question mark (?). They allow you to specify that a property may or may not be present in an object.

How do I define an interface with optional properties?

You can define an interface like this: interface User { name: string; age?: number; }. Here, age is optional.

What happens if I try to access an optional property that doesn't exist?

If you try to access a non-existent optional property, TypeScript will not throw an error, but it will return undefined.

Can I use optional properties with classes?

Yes, you can! Optional properties can be used in classes just like in interfaces. You define them in the class constructor.