Dart LanguageEasy20 XP2 min read
How do typedefs work in Dart and why are they useful?
TL;DR: typedef creates a named alias for function types or complex generic types, improving code readability and allowing recursive type definitions.
Full Answer
Typedefs serve two main purposes: aliasing function signatures for callbacks/handlers, and creating readable names for complex generic types.
Code Examples
darttypedef for function types and generic aliases
Output
true false
Interview Tip
💡
Generic typedefs (Dart 2.13+) enable powerful abstractions. They're different from type aliases in that they can have type parameters: typedef Parser<T> = T Function(String).
#typedef#function-types#generics#type-alias