What is the difference between types and interfaces in TypeScript?

What is the difference between types and interfaces in TypeScript?

In TypeScript, both types and interfaces can be used to define the shape of an object, but they have some differences. Interfaces are primarily used for defining object shapes and can be extended or implemented, while types can represent any valid TypeScript type, including primitives, unions, and intersections.

Can you give me an example of when to use an interface over a type?

Sure! Use an interface when you want to define a contract for classes to implement. For example, if you have a class that needs to adhere to a specific structure, an interface is a good choice. Types are better for more complex types or when you need to use unions.

Are there any performance differences between using types and interfaces?

Generally, there are no significant performance differences between types and interfaces in TypeScript. The choice between them is more about design and readability than performance.

Can interfaces extend multiple other interfaces?

Yes, interfaces can extend multiple other interfaces using a comma-separated list. This allows you to create a new interface that combines the properties of multiple existing interfaces.