What are the best practices for using interfaces in TypeScript?

What are the best practices for using interfaces in TypeScript?

Some best practices include using interfaces to define contracts for objects, extending interfaces for reusability, and keeping them simple.

Can you explain how to extend interfaces?

Sure! You can extend an interface by using the extends keyword. For example, interface A extends B {} allows A to inherit properties from B.

What about optional properties in interfaces?

Optional properties can be defined using a question mark, like propertyName?: type. This makes the property optional when implementing the interface.

Are there any common mistakes to avoid?

Yes, common mistakes include overusing interfaces for every object, not using them for function types, and forgetting to keep them updated.