What is the difference between interface and type in TypeScript?

What is the difference between interface and type in TypeScript?

In TypeScript, both 'interface' and 'type' can be used to define object shapes, but they have some differences. Interfaces are extendable and can be merged, while types are more flexible and can represent any valid TypeScript type.

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

Sure! Use an interface when you want to define a contract for classes or when you need to extend multiple interfaces. For example, if you have a class that implements a specific structure, using an interface is ideal.

What about using type? When should I prefer it?

You should prefer 'type' when you need to create union types or when you want to define a more complex type that includes primitives, tuples, or other types. It's more versatile in that sense.

Are there any performance differences between using interface and type?

Generally, there are no significant performance differences between the two. The choice between them is more about design and use case rather than performance.