Types vs. interfaces in TypeScript

The article explores the nuanced differences and similarities between types and interfaces in TypeScript, offering guidance on when to use each. It explains that both are used to define data shapes, but types offer more flexibility, supporting union types, tuples, function types, and advanced features like conditional and mapped types. Interfaces, on the other hand, facilitate declaration merging, which is not possible with types, and are more aligned with object-oriented programming, supporting polymorphism and inheritance via the extends keyword. The choice between types and interfaces often depends on the programmer's style and the specific requirements of the project, such as the need for advanced type manipulations or declaration merging. The article suggests using types when working with advanced type features and interfaces for declaration merging, providing a comprehensive overview of their capabilities to aid developers in making informed decisions.