What are advanced interfaces in TypeScript?

What are advanced interfaces in TypeScript?

Advanced interfaces in TypeScript allow you to define complex types, including optional properties, readonly properties, and function types.

Can you give me an example of an advanced interface?

Sure! Here's an example:

interface User {
    id: number;
    name: string;
    email?: string; // optional property
    readonly createdAt: Date; // readonly property
    greet(): string; // method
}

How do I use this interface in a function?

You can use the interface as a type for function parameters. For example:

function welcomeUser(user: User): string {
    return `Welcome, ${user.name}!`;
}

What are some common use cases for advanced interfaces?

Common use cases include defining data models, API responses, and ensuring type safety in complex applications.