What s the difference between class and interface in TypeScript When do you use them

Question

I've got a login page that uses username and password in TypeScript.

export interface UserLogin {
  email: string;
  password: string;
}
//OR
export class UserLogin {
  email: string;
  password: string;
}

How do you know when to use what?

Answer 1

A class is a blueprint of how objects are supposed to be implemented, whereas interfaces are used only for type-checking.

In your case, it would be right to use an interface for UserLogin.