TypeScript16 min readTypeScript Type Aliases
Use type aliases to create reusable custom types and combine them with unions and intersections.
Type aliases give names to complex types. ## Basic ```ts type ID = number | string; let userId: ID = 101; ``` ## Object alias ```ts type User = { id: ID; name: string; }; ``` ## Intersection ```ts type A = { a: number }; type B = { b: number }; type C = A & B; let obj: C = { a: 1, b: 2 }; ``` ## Type vs Interface - Type: unions, primitives - Interface: object shapes, extension ## Remember - Use type for flexibility - Combine with unions/intersections